For Valve Stem In Internal Combustion Engine Patents (Class 277/502)
  • Patent number: 9371749
    Abstract: A valve stem seal assembly has a metal retainer, an elastomeric seal, and a metal valve guide. The metal retainer and the elastomeric seal are attached to each other, and the elastomeric seal is in sealable contact with the metal valve guide, while the metal retainer is in metal-to-metal gripping contact with the metal valve guide. A stop may be formed in the metal retainer that cooperates with a shoulder formed in the metal valve guide in order to prevent over-installation of the assembly of the elastomeric seal with attached metal retainer, when this assembly is installed over the metal valve guide.
    Type: Grant
    Filed: February 1, 2013
    Date of Patent: June 21, 2016
    Assignee: Dana Automotive Systems Group, LLC
    Inventors: Timothy A. Hegemier, Alexander S. Williamson, Robert W. Lehmann
  • Patent number: 9347343
    Abstract: Described herein is a gasket for a valve of an internal-combustion engine; the valve comprises at guide element defining a through seat, find a stein slidably mobile in said seat; the gasket comprises an annular sealing element, which is elastically deformable and is designed to be set externally on the valve to co-operate both with the guide element and with the stem, and an annular supporting member, which is set coaxially on at least part of the sealing element in such a way that the latter is radially pressed between the supporting member and the valve; the supporting member comprises a first portion for interaction with the sealing element and a second portion for positioning in use the gasket on the engine; the first and second portions of the supporting member form part of a first component and a second component respectively, that are distinct from one another and are mounted coaxially by snap-action coupling means.
    Type: Grant
    Filed: June 12, 2014
    Date of Patent: May 24, 2016
    Assignee: FREUDENBERG SEALING TECHNOLOGIES S.A.S. DI EXTERNA ITALIA S.R.L.U.
    Inventors: Claudio Zoppi, Andrea Giordano, Paolo Fervier, Daniele Bordabossana
  • Patent number: 9284863
    Abstract: A valve stem seal (1) seals a valve stem (4) that is reciprocally movable in an axial direction. The valve stem seal includes a base body (8) that is connectable with a valve stem guide (6). A first seal lip (10) is resiliently positioned relative to the base body via an elastic connection (16) and seals the valve stem relative to an oil chamber (24). A second seal lip (12) is spaced in the axial direction (2) from the first seal lip and seals the valve stem relative to a gas chamber. The second seal lip is also resiliently positioned relative to the base body via the elastic connection.
    Type: Grant
    Filed: September 27, 2012
    Date of Patent: March 15, 2016
    Assignee: AKTIEBOLAGET SKF
    Inventors: Juergen Kurth, Juergen Netzer
  • Patent number: 9052018
    Abstract: An eccentricity tolerant valve stem seal assembly includes an elastomeric seal having an upper metal retainer extending down and within an upper seal portion which has an inwardly directed sealing lip for contacting a valve stem. There are also a flexible middle and a lower seal portions. The lower seal portion is connected to a lower metal seal retainer that is disposed up to a lower edge of the middle seal portion. The flexible middle seal portion allows the upper seal portion to flex from an eccentric valve stem without losing the sealing function of the sealing lip. In cooperation with the above described structure, a separate cover may be in a tight tolerance fit with the lower seal retainer over top of the eccentricity tolerant valve stem seal, in order to limit axial displacement of the upper portion of the seal due to high manifold pressure.
    Type: Grant
    Filed: July 11, 2011
    Date of Patent: June 9, 2015
    Assignee: Dana Automotive Systems Group, Inc.
    Inventors: Timothy A. Hegemier, Robert W. Lehmann, Alexander S. Williamson
  • Patent number: 9010089
    Abstract: A reductant delivery unit (10) includes a fluid injector (12) and a flange (20) coupled with the fluid injector. An exhaust boss (28) has a surface (39) defining a through-hole (40) that communicates with a vehicle's exhaust flow path. The flange is coupled to a mounting surface such that the outlet of the fluid injector communicates with the exhaust flow path so as to control injection of urea solution into the exhaust gas flow path. A gasket (32) is sandwiched between the flange and the mounting surface. The gasket has a surface (37) defining a through-hole (38) therein that communicates with the through-hole in the exhaust boss to permit the urea solution to pass from the fluid outlet to the exhaust flow path. Gasket shielding structure (44) covers the surface defining the through-hole in the gasket to prevent the urea solution from contacting the gasket.
    Type: Grant
    Filed: August 18, 2011
    Date of Patent: April 21, 2015
    Assignee: Continental Automotive Systems, Inc.
    Inventors: Stephen C. Bugos, Michael J. Hornby
  • Patent number: 8893681
    Abstract: A valve stem seal assembly for an internal combustion engine includes an annular rigid case disposed around a valve guide and a valve stem. An annular elastomeric body is press fit within the annular rigid case and including a radially inwardly extending seal lip in sealing contact with the valve stem. The annular elastomeric body includes a first axial end facing the valve guide and a second axial end facing away from the valve guide. The annular rigid case includes a radially inwardly extending end wall opposing the second axial end of the annular elastomeric body and including a lip support extending axially from an inner portion of the radially inwardly extending end wall and opposing a radially inner surface of the radially inwardly extending seal lip.
    Type: Grant
    Filed: March 7, 2013
    Date of Patent: November 25, 2014
    Assignee: Freudenberg-NOK General Partnership
    Inventor: David Sakata
  • Patent number: 8764019
    Abstract: A gasket for a valve in an internal combustion engine is provided with a first elastically deformable portion adapted to cooperate with a rod of the valve. A second elastically deformable portion is adapted to cooperate with an outer surface of a guide element of the valve, and a third elastically deformable portion is interposed between the first and the second elastically deformable portions and bearing a cantilevered gas tight seal lip is adapted to cooperate with the rod of the valve. The lip displays a frustoconical configuration with a section decreasing in opposite direction to the pressure forces directed towards the first elastically deformable portion and is connected to the third elastically deformable portion at its greater section part. The lip is further connected on the side exposed to the pressure forces, to the third elastically deformable portion by a surface bearing one or more waves.
    Type: Grant
    Filed: December 20, 2007
    Date of Patent: July 1, 2014
    Assignee: Corcos Industriale S.a.s. di Freudenberg & Cosso S.r.l.
    Inventor: Claudio Zoppi
  • Patent number: 8668203
    Abstract: A valve stem seal can include an elastomeric component having a first portion for having a sealed engagement with a valve stem, and a pressure relief lip engaging a valve guide. The pressure relief lip can have a sealing configuration and a venting configuration. The venting configuration can allow excess exhaust gases to vent from a combustion chamber. After the venting of excess exhaust gases, the pressure relief lip can close to the sealing configuration to prevent oil from entering the combustion chamber. The elastomeric body or the valve guide can include a pressure relief channel. The elastomeric body can also include a bumper engaging the valve guide. The pressure relief channel can be disposed in the bumper.
    Type: Grant
    Filed: June 26, 2012
    Date of Patent: March 11, 2014
    Assignee: Freudenberg-NOK General Partnership
    Inventor: David Sakata
  • Patent number: 8601991
    Abstract: A valve stem seal assembly in an internal combustion engine includes a cylinder head including an aperture therein in communication with a cylinder bore and a recessed pocket surrounding the aperture. A valve guide is received in the aperture and a valve stem is received in the valve guide. A valve seal support includes a radially outwardly extending flange disposed against a surface of the cylinder head external to the recessed pocket and a cylindrical body that extends into the recessed pocket. A valve spring contacts the flange and a resilient seal is secured to the rigid valve seal support and in sealing engagement with the valve stem.
    Type: Grant
    Filed: August 2, 2011
    Date of Patent: December 10, 2013
    Assignee: Freudenberg-NOK General Partnership
    Inventors: Rory S. Pawl, Patrick L. Scheib, John A. London
  • Publication number: 20130200574
    Abstract: A valve stem seal assembly has a metal retainer, an elastomeric seal, and a metal valve guide. The metal retainer and the elastomeric seal are attached to each other, and the elastomeric seal is in sealable contact with the metal valve guide, while the metal retainer is in metal-to-metal gripping contact with the metal valve guide. A stop may be formed in the metal retainer that cooperates with a shoulder formed in the metal valve guide in order to prevent over-installation of the assembly of the elastomeric seal with attached metal retainer, when this assembly is installed over the metal valve guide.
    Type: Application
    Filed: February 1, 2013
    Publication date: August 8, 2013
    Inventors: Timothy A. Hegemier, Alexander S. Williamson, Robert W. Lehmann
  • Patent number: 8439330
    Abstract: A stem shoulder seal with double rings is composed of a sealing ring, a clamping ring and a spherical or conical stem shoulder, and the sealing ring is of a self-energized seal designed to its ultimate allowable strength and automatically free of any load beyond its ultimate strength. An assembly of independent dual stem seals, consisting of a stem shoulder seal with double rings, a stem cylinder seal with triangular sections and an isolating mating, can ensure that a stem has three seals which get well seated automatically at the same time to bear an identical ultimate medium pressure independently or without any mutual interference in service when assembled to the extent that the stem operating torque is just definitely increased, thereby ensuring that a stem sealing has a triple safety.
    Type: Grant
    Filed: April 28, 2011
    Date of Patent: May 14, 2013
    Assignees: Zhejiang China Value Co., Ltd.
    Inventors: Changxiang Xu, Mao Yang, Zhanji Chen
  • Publication number: 20130082203
    Abstract: A valve stem seal (1) seals a valve stem (4) that is reciprocally movable in an axial direction. The valve stem seal includes a base body (8) that is connectable with a valve stem guide (6). A first seal lip (10) is resiliently positioned relative to the base body via an elastic connection (16) and seals the valve stem relative to an oil chamber (24). A second seal lip (12) is spaced in the axial direction (2) from the first seal lip and seals the valve stem relative to a gas chamber. The second seal lip is also resiliently positioned relative to the base body via the elastic connection.
    Type: Application
    Filed: September 27, 2012
    Publication date: April 4, 2013
    Applicant: AKTIEBOLAGET SKF
    Inventors: Juergen Kurth, Juergen Netzer
  • Publication number: 20130032118
    Abstract: A valve stem seal assembly in an internal combustion engine includes a cylinder head including an aperture therein in communication with a cylinder bore and a recessed pocket surrounding the aperture. A valve guide is received in the aperture and a valve stem is received in the valve guide. A valve seal support includes a radially outwardly extending flange disposed against a surface of the cylinder head external to the recessed pocket and a cylindrical body that extends into the recessed pocket. A valve spring contacts the flange and a resilient seal is secured to the rigid valve seal support and in sealing engagement with the valve stem.
    Type: Application
    Filed: August 2, 2011
    Publication date: February 7, 2013
    Applicant: FREUDENBERG-NOK GENERAL PARTNERSHIP
    Inventors: Rory S. Pawl, Patrick L. Scheib, John A. London
  • Publication number: 20130015625
    Abstract: An eccentricity tolerant valve stem seal assembly includes an elastomeric seal having an upper metal retainer extending down and within an upper seal portion which has an inwardly directed sealing lip for contacting a valve stem. There are also a flexible middle and a lower seal portions. The lower seal portion is connected to a lower metal seal retainer that is disposed up to a lower edge of the middle seal portion. The flexible middle seal portion allows the upper seal portion to flex from an eccentric valve stem without losing the sealing function of the sealing lip. In cooperation with the above described structure, a separate cover may be in a tight tolerance fit with the lower seal retainer over top of the eccentricity tolerant valve stem seal, in order to limit axial displacement of the upper portion of the seal due to high manifold pressure.
    Type: Application
    Filed: July 11, 2011
    Publication date: January 17, 2013
    Inventors: Timothy A. Hegemier, Robert W. Lehmann, Alexander S. Williamson
  • Publication number: 20130000588
    Abstract: A valve stem seal (10) for a combustion engine may comprise a cylindrical body (12) including a mounting portion (16) and a valve stem sealing portion (14) integrally formed with the mounting portion (16), and an o-ring (26) configured for sealing engagement with a valve stem reciprocating in a valve guide (40) of a valve of the combustion engine. The mounting portion (16) may define an opening (18) for receiving an upper end (43) of the valve guide (40) and may be configured for substantially fluid-tight engagement with the upper end (43) of the valve guide (40). The valve stem sealing portion (14) may include an annular groove (22) formed in an inner surface of the cylindrical body (12). The o-ring (26) may be received in the annular groove.
    Type: Application
    Filed: June 29, 2012
    Publication date: January 3, 2013
    Applicant: Caterpillar Motoren GmbH & Co. KG
    Inventors: Hartmut Bartel, Hendrik Herold, Ole Ehlert, Ulrich Holst, Jan Rodenbeck
  • Publication number: 20120267861
    Abstract: A valve stem seal can include an elastomeric component having a first portion for having a sealed engagement with a valve stem, and a pressure relief lip engaging a valve guide. The pressure relief lip can have a sealing configuration and a venting configuration. The venting configuration can allow excess exhaust gases to vent from a combustion chamber. After the venting of excess exhaust gases, the pressure relief lip can close to the sealing configuration to prevent oil from entering the combustion chamber. The elastomeric body or the valve guide can include a pressure relief channel. The elastomeric body can also include a bumper engaging the valve guide. The pressure relief channel can be disposed in the bumper.
    Type: Application
    Filed: June 26, 2012
    Publication date: October 25, 2012
    Applicant: FREUDENBERG-NOK GENERAL PARTNERSHIP
    Inventor: David Sakata
  • Patent number: 8246006
    Abstract: A valve seal has a sealing lip and a compressible portion. The valve seal is utilized to seal a valve guide and a stem. The valve guide has a height within a predetermined range of heights and the sealing lip sealingly engages the stem. The compressible portion has at least two articulating portions with a hinge portion between the two articulating portions. The compressible portion sealingly engages the valve guide and articulates to accept the valve guide without substantially deforming the lip or interfering with the stem.
    Type: Grant
    Filed: June 1, 2006
    Date of Patent: August 21, 2012
    Assignee: Dana Automotive Systems Group, LLC
    Inventor: Mark A. Leimer
  • Patent number: 8235394
    Abstract: A valve stem seal can include an elastomeric component having a first portion for having a sealed engagement with a valve stem, and a pressure relief lip engaging a valve guide. The pressure relief lip can have a sealing configuration and a venting configuration. The venting configuration can allow excess exhaust gases to vent from a combustion chamber. After the venting of excess exhaust gases, the pressure relief lip can close to the sealing configuration to prevent oil from entering the combustion chamber. The elastomeric body or the valve guide can include a pressure relief channel. The elastomeric body can also include a bumper engaging the valve guide. The pressure relief channel can be disposed in the bumper.
    Type: Grant
    Filed: April 23, 2008
    Date of Patent: August 7, 2012
    Assignee: Freudenberg-NOK General Partnership
    Inventor: David Sakata
  • Publication number: 20120111297
    Abstract: A valve stem seal for an internal combustion engine includes a seal body having a gas seal assembly spaced from an oil seal assembly in the axial direction of the valve stem seal. The gas seal assembly includes a first gas lip and a second gas lip disposed between the oil seal assembly and the first gas lip.
    Type: Application
    Filed: April 6, 2010
    Publication date: May 10, 2012
    Inventor: J├╝rgen Netzer
  • Patent number: 8011669
    Abstract: A valve stem seal can include an elastomeric component having a first portion for having a sealed engagement with a valve stem, a second portion for engaging a valve guide, and a pressure relief lip extending from the second portion. The first portion can be configured to extend away from or within the second portion, and the second portion can have a channel formed therein. The pressure relief lip can have a sealing configuration and a venting configuration. The venting configuration can allow excess exhaust gases to vent from a combustion chamber. After the venting of excess exhaust gases, the pressure relief lip can close to the sealing configuration to prevent oil from entering the combustion chamber.
    Type: Grant
    Filed: December 6, 2007
    Date of Patent: September 6, 2011
    Assignee: Freudenberg-NOK General Partnership
    Inventors: David Sakata, Tigree Milam Butcher
  • Patent number: 7900932
    Abstract: A valve stem seal assembly includes a retainer and a sealing element disposed within the retainer. The retainer includes upper and lower portions. The sealing element is attached to the upper portion of the retainer and includes a first sealing lip for sealing a valve stem. An optional second sealing lip may also be included.
    Type: Grant
    Filed: August 3, 2004
    Date of Patent: March 8, 2011
    Assignee: Dana Automotive Systems Group, LLC
    Inventors: Mark A. Leimer, Mark A. Stamback, Cathy Stamback, legal representative
  • Patent number: 7862048
    Abstract: A gasket for a valve in an internal combustion engine is provided with a support element having a tubular configuration according to an axis and coaxially mounted on the valve. An elastically deformable element is interposed between the support element and the valve. The support element includes a first portion elongated according to the above mentioned axis, and a second portion extending from the first portion in a direction transversal to the axis, at least partially housed in an annular seat of the elastically deformable element and having its radially outermost end connected to the first portion itself. The support element comprises a third portion extending from the radially innermost end of the second portion and folded on the second portion itself so as to generate, in the folding area, a rounded edge cooperating with the annular seat of the elastically deformable element.
    Type: Grant
    Filed: December 7, 2009
    Date of Patent: January 4, 2011
    Assignee: Corcos Industriale S.a.s. di Freudenberg & Cosso S.r.l.
    Inventor: Francesco Scarano
  • Publication number: 20100295252
    Abstract: A valve stem seal utilizes a multi-piece construction to reduce the required manufactured tolerances and/or improve the stress handling capabilities. The valve stem seal can include a first member or can which can be assembled to a second member or spring seat. The can and/or spring seat can have a plurality of axially extending resilient fingers that are biased such that when assembled the fingers are bent against the bias due to the engagement between the can and the spring seat. The fingers on the spring seat allow the spring seat to bend or move relative to the can to accommodate the loading of a valve spring on the spring seat. The use of resilient fingers on the can and/or the spring seat reduces the manufacturing tolerances required for the valve stem seal.
    Type: Application
    Filed: May 20, 2009
    Publication date: November 25, 2010
    Applicant: FREUDENBERG-NOK GENERAL PARTNERSHIP
    Inventors: Rory S. Pawl, Patrick L. Scheib, John A. London
  • Patent number: 7828298
    Abstract: A firewall sealing assembly is provided for use between a firewall and a penetrating member. The assembly comprises a flexible coupling and a secondary seal. The flexible coupling is configured to provide a primary seal between the firewall and the penetrating member. The secondary seal is configured to provide a secondary seal between the firewall and the penetrating member. The secondary seal is positioned spaced apart from the flexible coupling to define a seal cavity there between.
    Type: Grant
    Filed: April 30, 2007
    Date of Patent: November 9, 2010
    Assignee: Honeywell International Inc.
    Inventor: Mark R. Cummings
  • Publication number: 20100084821
    Abstract: A gasket for a valve in an internal combustion engine is provided with a support element having a tubular configuration according to an axis and coaxially mounted on the valve. An elastically deformable element is interposed between the support element and the valve. The support element includes a first portion elongated according to the above mentioned axis, and a second portion extending from the first portion in a direction transversal to the axis, at least partially housed in an annular seat of the elastically deformable element and having its radially outermost end connected to the first portion itself. The support element comprises a third portion extending from the radially innermost end of the second portion and folded on the second portion itself so as to generate, in the folding area, a rounded edge cooperating with the annular seat of the elastically deformable element.
    Type: Application
    Filed: December 7, 2009
    Publication date: April 8, 2010
    Applicant: Corcos Industriale S.a.s. di Freudenberg & Cosso S.r.l.
    Inventor: Francesco Scarano
  • Patent number: 7654537
    Abstract: A gasket for a valve in an internal combustion engine is provided with a support element having a tubular configuration according to an axis and coaxially mounted on the valve. An elastically deformable element is interposed between the support element and the valve. The support element includes a first portion elongated according to the above mentioned axis, and a second portion extending from the first portion in a direction transversal to the axis, at least partially housed in an annular seat of the elastically deformable element and having its radially outermost end connected to the first portion itself. The support element comprises a third portion extending from the radially innermost end of the second portion and folded on the second portion itself so as to generate, in the folding area, a rounded edge cooperating with the annular seat of the elastically deformable element.
    Type: Grant
    Filed: December 20, 2007
    Date of Patent: February 2, 2010
    Assignee: Corcos Industriale S.a.s. di Freudenberg & Cosso S.r.l.
    Inventor: Francesco Scarano
  • Publication number: 20090256315
    Abstract: To provide a sealing device in which a spring retainer portion integrally provided on a metal ring is neither worn away nor damaged, whereby it is made possible to achieve an easy production and a cost reduction, a sealing device is constructed by a cylindrical metal ring, a seal lip provided on one end of the metal ring and made of a rubber-like elastic material, a spring retainer portion provided on the other end of the metal ring, and a spring seated on the spring retainer portion, and the spring retainer portion is provided with an engaging means for preventing a rotating motion of the spring.
    Type: Application
    Filed: April 8, 2009
    Publication date: October 15, 2009
    Applicant: NOK CORPORATION
    Inventor: Kokichi HAMAMOTO
  • Publication number: 20090146382
    Abstract: A valve stem seal can include an elastomeric component having a first portion for having a sealed engagement with a valve stem, a second portion for engaging a valve guide, and a pressure relief lip extending from the second portion. The first portion can be configured to extend away from or within the second portion, and the second portion can have a channel formed therein. The pressure relief lip can have a sealing configuration and a venting configuration. The venting configuration can allow excess exhaust gases to vent from a combustion chamber. After the venting of excess exhaust gases, the pressure relief lip can close to the sealing configuration to prevent oil from entering the combustion chamber.
    Type: Application
    Filed: December 6, 2007
    Publication date: June 11, 2009
    Applicant: FREUDENBERG-NOK GENERAL PARTNERSHIP
    Inventors: David Sakata, Tigree Milam Butcher
  • Patent number: 7438036
    Abstract: A valve stem seal having an annular valve body with an upper surface, a lower surface, and defining an aperture is disclosed. The valve body is positioned for selective sealing engagement with a valve stem. At least one orifice is disposed on an inner surface of the annular valve body between the annular valve body and the valve stem. The orifice controls the rate of oil flow between the annular valve body and the valve stem.
    Type: Grant
    Filed: February 3, 2005
    Date of Patent: October 21, 2008
    Assignee: Dana Automotive Systems Group, LLC
    Inventors: Eric W. Hesher, Robert W. Lehmann
  • Publication number: 20080157482
    Abstract: A gasket for a valve in an internal combustion engine is provided with a first elastically deformable portion adapted to cooperate with a rod of the valve. A second elastically deformable portion is adapted to cooperate with an outer surface of a guide element of the valve, and a third elastically deformable portion is interposed between the first and the second elastically deformable portions and bearing a cantilevered gas tight seal lip is adapted to cooperate with the rod of the valve. The lip displays a frustoconical configuration with a section decreasing in opposite direction to the pressure forces directed towards the first elastically deformable portion and is connected to the third elastically deformable portion at its greater section part. The lip is further connected on the side exposed to the pressure forces, to the third elastically deformable portion by a surface bearing one or more waves.
    Type: Application
    Filed: December 20, 2007
    Publication date: July 3, 2008
    Applicant: Corcos Industriale S.a.s. di Freudenberg & Cosso S.r.l.
    Inventor: Claudio Zoppi
  • Publication number: 20080007011
    Abstract: A compressed gas cylinder valve seal comprising a non-metallic seal substrate having a top surface, and a bottom surface connected to one another along a circumferential skirt, an elastomeric material overmold retention channel passing completely through the seal substrate, an elastomeric material overmolded onto the top surface and the bottom surface and filling the elastomeric material overmold retention channel, and a gas passageway passing axially, completely through the non-metallic seal substrate.
    Type: Application
    Filed: July 7, 2006
    Publication date: January 10, 2008
    Inventor: Henry Buermann
  • Patent number: 7025030
    Abstract: A valve stem seal assembly includes a changeable cap. The cap is made of a flexible material, such as plastic or the like. A sealing element with sealing lips for sealing the valve stem is integrally bonded to the cap. The cap includes one or more tabs with a gripping member that cooperates with a corresponding gripping member on the retainer to snap-fit the cap onto the retainer. The retainer can also be made of plastic material. Once fitted onto the retainer, the cap can be easily removed by constructively destroying the one or more tabs using a tool, such as a screwdriver. A cap with a new sealing element can then be snap-fit on the retainer. The changeable cap allows for replacement of the sealing element without replacing the retainer or other components of the valve stem seal assembly.
    Type: Grant
    Filed: August 21, 2003
    Date of Patent: April 11, 2006
    Assignee: Dana Corporation
    Inventor: Mark A. Leimer
  • Patent number: 7017915
    Abstract: An improved seal arrangement in an assembly such as a valve assembly in which a compression member is provided to press a seal between the compression member and the valve body. In a preferred form, the compression member includes a recess which receives a first portion of the seal, and a second portion of the seal is disposed between the compression member and the valve body. In addition, a first inclined surface is provided in the recess of the compression member. The first inclined surface contacts a second inclined surface provided on the first portion of the seal. A third inclined surface on the compression member contacts a fourth inclined surface provided at a juncture between the first and second portions of the seal. Further, a fifth inclined surface is provided on the housing to contact a sixth inclined surface provided on the second portion of the seal.
    Type: Grant
    Filed: October 3, 2001
    Date of Patent: March 28, 2006
    Assignee: Metso Automation USA Inc.
    Inventors: Philip J. Dorrian, David C. Bayreuther
  • Patent number: 6877719
    Abstract: A valve shaft seal includes a reinforcing ring having a cylindrical section extending over a certain axial length and possessing an outer diameter, a sealing element disposed on the reinforcing ring, and a valve spring supported on a radially extending end section of the reinforcing ring. To support the valve spring on the radially extending end section of the reinforcing ring, the radially extending end section extends radially farther inward in the direction of the axis of the valve shaft seal than the outer diameter of the cylindrical section of the reinforcing ring.
    Type: Grant
    Filed: October 18, 2002
    Date of Patent: April 12, 2005
    Assignee: AB SKF
    Inventor: Werner Heinl
  • Patent number: 6764079
    Abstract: A radially compliant valve stem seal assembly is adapted for installation over a valve guide of an internal combustion engine. The assembly includes a metallic cylindrical straight-walled retainer with an elastomeric sealing element chemically bonded to the interior surface of the retainer. The sealing element includes upper and lower portions; the upper portion includes a pair of sealing lips comprising an oil sealing lip and a gas sealing lip. The lips are adapted to meter oil through an interface between the seal assembly and the associated valve stem for assuring proper lubrication at the interface. The lower portion of the elastomeric sealing element provides one or more annular radially inwardly oriented gripping ribs adapted to engage the guide via an interference fit. The gripping ribs are adapted to balance forces of installation against those of securement of the valve stem seal assembly over a wide valve guide diameter tolerance range.
    Type: Grant
    Filed: April 19, 2002
    Date of Patent: July 20, 2004
    Assignee: Dana Corporation
    Inventors: Timothy A. Hegemier, Alexander S. Williamson
  • Patent number: 6761141
    Abstract: A valve stem seal assembly includes a retainer with one or more built-in sprues, a cavity at one end, an annular flange on the opposite end, and a cylindrical interior passageway therebetween. The built-in sprues extend from the bottom surface of the cavity to the annular flange. When the valve stem seal assembly is fitted atop the valve guide, a gap is formed between the bottom surface of the cavity of the retainer and the top surface of the valve guide to accommodate manufacturing tolerances in the height of the valve guide. A jacket is integrally bonded to the retainer by introducing material into the cavity, through the built-in sprues, and out of the bottom of the annular flange. A method of manufacturing the valve stem seal assembly with one or more built-in sprues is disclosed.
    Type: Grant
    Filed: December 10, 2002
    Date of Patent: July 13, 2004
    Assignee: Dana Corporation
    Inventor: Mark Alan Leimer
  • Patent number: 6752398
    Abstract: A valve stem seal assembly incorporates a cylindrical retainer having an axis and an upper end about which symmetrically and circumferentially arranged, alternating first and second sets of fingers have radially inwardly depending upper ends. The first set of fingers is generally parallel to the axis and the upper ends are generally perpendicular to the axis to engage a first exterior annular groove of an elastomeric seal body. The first set of fingers provides for axial attachment of the seal body to a top of a valve guide. The second set of fingers is generally arcuate and the upper ends extend radially inwardly to engage a second exterior annular groove of the seal body. The second set of fingers eliminates the need for a garter spring used by traditional valve stem seal assemblies by generating a force to urge the sealing lip against a reciprocating valve stem.
    Type: Grant
    Filed: December 2, 2002
    Date of Patent: June 22, 2004
    Assignee: Dana Corporation
    Inventor: Troy D. McArthy
  • Publication number: 20040104537
    Abstract: A valve stem seal assembly incorporates a cylindrical retainer having an axis and an upper end about which symmetrically and circumferentially arranged, alternating first and second sets of fingers have radially inwardly depending upper ends. The first set of fingers is generally parallel to the axis and the upper ends are generally perpendicular to the axis to engage a first exterior annular groove of an elastomeric seal body. The first set of fingers provides for axial attachment of the seal body to a top of a valve guide. The second set of fingers is generally arcuate and the upper ends extend radially inwardly to engage a second exterior annular groove of the seal body. The second set of fingers eliminates the need for a garter spring used by traditional valve stem seal assemblies by generating a force to urge the sealing lip against a reciprocating valve stem.
    Type: Application
    Filed: December 2, 2002
    Publication date: June 3, 2004
    Applicant: DANA CORPORATION
    Inventor: Troy D. McArthy
  • Patent number: 6679502
    Abstract: A valve stem seal assembly for an internal combustion engine includes an elastomer seal body and a metal retainer adapted to secure the seal body in place over a valve guide. The cylindrical seal body has an aperture with at least one radially inwardly directed sealing lip adapted to engage a reciprocally movable valve stem to minimize escape of oil lubricant from the engine along a path between the valve guide and stem. The retainer, formed of a spring metal cylindrical body adapted to frictionally retain the seal body at its upper end, contains first and second sets of axially depending resilient fingers at its lower end. The first set of fingers mechanically engages and supports a unique valve guide member within a valve guide aperture of a cylinder head deck, while the second set of fingers supports the seal assembly directly against the head deck under a valve spring.
    Type: Grant
    Filed: August 28, 2001
    Date of Patent: January 20, 2004
    Assignee: Dana Corporation
    Inventor: Mark Alan Leimer
  • Patent number: 6659469
    Abstract: An elastomeric valve stem seal component is adapted for installation over a valve guide of an internal combustion engine. The seal component incorporates fabric reinforcement within an annular jacket body of the component. In one preferred form, the fabric is positioned intermediate two elastomeric layers of the seal body; i.e. between an inner layer and an outer layer. One preferred manufacturing method provides extrusion of a tube having a fabric reinforcement layer already provided between inner and outer layers. A cutting die incorporates a push ring adapted to move the component along a staged molding assembly process. A series of threaded core pins are utilized for conveyance of the component in the fabrication process, which includes extruding a rubber tube and cover over a series of threaded core pins, cutting a portion of the rubber tube to a predetermined length, and molding the predetermined length to produce the component.
    Type: Grant
    Filed: February 6, 2003
    Date of Patent: December 9, 2003
    Assignee: Dana Corporation
    Inventor: Mark A. Leimer
  • Patent number: 6609700
    Abstract: A valve stem seal assembly for an internal combustion engine includes an elastomer seal body and a metal retainer adapted to hold the seal body in place over a valve guide. The circumferential seal body includes an aperture containing at least one radially inwardly directed sealing lip adapted to engage an engine valve stem to minimize escape of oil lubricant from the engine, particularly along a path between the valve guide and the reciprocally moving valve stem. The seal body contains an annular exterior groove adapted to receive an end wall in the upper extremity of the retainer. The retainer, formed of spring metal, comprises a cylindrical body containing a plurality of axially depending resilient fingers. The bottom extremities of the fingers have inwardly turned ends adapted to mechanically engage a circumferentially disposed groove or a step of a boss formed in the exterior cylindrical surface of the valve guide.
    Type: Grant
    Filed: May 31, 2001
    Date of Patent: August 26, 2003
    Assignee: Dana Corporation
    Inventor: Mark Alan Leimer
  • Publication number: 20030146580
    Abstract: A radially compliant valve stem seal assembly for an internal combustion engine includes a metallic retainer having a plurality of circumferentially spaced, axially depending legs. Each of the legs includes at least one radially inwardly depending protuberance adapted to engage a valve guide surface. The legs are arranged and disposed on the retainer to be radially flexible, yet axially stiff, to balance forces of installation against those of securement of valve stem seal assembly over a wide valve guide diameter tolerance range. In one disclosed embodiment, the retainer has three separate circumferentially spaced legs, each including a single dimple in its structure. The dimples are adapted to provide the only direct contact of the legs with the valve guide circumference. The retainer legs are adapted to flex radially outwardly, and produce a spring tension between the dimples and the guide for maintaining the dimples in engagement with the valve guide.
    Type: Application
    Filed: February 1, 2002
    Publication date: August 7, 2003
    Inventor: Timothy Alan Hegemier
  • Publication number: 20030052458
    Abstract: A unitized seal for use in a gas spring seal assembly. The unitized seal includes a rigid thermoplastic insert having an elastomeric sealing layer surrounding the insert and bonded to the insert. The insert provides rigidity to the seal and includes a central, axial opening that receives and guides a rod slidably engaged with the insert. The sealing layer engages the interior surface of the gas spring cylinder to prevent the pressurized gas contained within the gas spring from escaping around the seal. The sealing layer also includes a central, axial opening aligned with the passage in the insert that slidably engages the rod and further prevent gas from escaping the gas spring cylinder. The unitized seal may be formed in a single or two-step process. In the single step process, the insert and sealing layer are formed by injection molding processes in a single mold and are bonded to one another by a subsequent covulcanization process.
    Type: Application
    Filed: August 9, 2002
    Publication date: March 20, 2003
    Inventor: Muhammad Salim Zafar
  • Patent number: 6527275
    Abstract: An elastomeric valve stem seal component is adapted for installation over a valve guide of an internal combustion engine. The seal component incorporates fabric reinforcement within an annular jacket body of the component. In one preferred form, the fabric is positioned intermediate two elastomeric layers of the seal body; i.e. between an inner layer and an outer layer. One preferred manufacturing method provides extrusion of a tube having a fabric reinforcement layer already provided between inner and outer layers. A cutting die incorporates a push ring adapted to move the component along a staged molding assembly process. A series of threaded core pins are utilized for conveyance of the component in the fabrication process, which includes extruding a rubber tube and cover over a series of threaded core pins, cutting a portion of the rubber tube to a predetermined length, and molding the predetermined length to produce the component.
    Type: Grant
    Filed: May 16, 2001
    Date of Patent: March 4, 2003
    Assignee: Dana Corporation
    Inventor: Mark A. Leimer
  • Publication number: 20030024497
    Abstract: A valve stem seal component overcomes potential orientation misplacement, particularly in cases where no valve stem seal is to be used on an adjacent valve. The component includes an integral locator feature for assuring proper installation atop a valve guide of an internal combustion engine. A plurality of such seal components are employed per engine, each component designed for insertion over at least the intake valve guide of each cylinder. Each component includes a valve stem seal module adapted to be installed over the intake valve guide. A locator is attached to the module via a radial connection portion that extends between the module and locator. The radial connection portion includes an arcuate edge that fits in only one orientation against a curvilinear edge of a boss on the cylinder head. In one described embodiment, the locator is a circular ring adapted to be installed over an exhaust guide.
    Type: Application
    Filed: July 31, 2001
    Publication date: February 6, 2003
    Applicant: Dana Corporation
    Inventors: Mark A. Leimer, Mark A. Stamback, Robert W. Lehmann
  • Publication number: 20020179877
    Abstract: A valve stem seal assembly for an internal combustion engine includes an elastomer seal body and a metal retainer adapted to hold the seal body in place over a valve guide. The circumferential seal body includes an aperture containing at least one radially inwardly directed sealing lip adapted to engage an engine valve stem to minimize escape of oil lubricant from the engine, particularly along a path between the valve guide and the reciprocally moving valve stem. The seal body contains an annular exterior groove adapted to receive an end wall in the upper extremity of the retainer. The retainer, formed of spring metal, comprises a cylindrical body containing a plurality of axially depending resilient fingers. The bottom extremities of the fingers have inwardly turned ends adapted to mechanically engage a circumferentially disposed groove or a step of a boss formed in the exterior cylindrical surface of the valve guide.
    Type: Application
    Filed: May 31, 2001
    Publication date: December 5, 2002
    Applicant: Dana Corporation
    Inventor: Mark Alan Leimer
  • Publication number: 20020171205
    Abstract: An elastomeric valve stem seal component is adapted for installation over a valve guide of an internal combustion engine. The seal component incorporates fabric reinforcement within an annular jacket body of the component. In one preferred form, the fabric is positioned intermediate two elastomeric layers of the seal body; i.e. between an inner layer and an outer layer. One preferred manufacturing method provides extrusion of a tube having a fabric reinforcement layer already provided between inner and outer layers. A cutting die incorporates a push ring adapted to move the component along a staged molding assembly process. A series of threaded core pins are utilized for conveyance of the component in the fabrication process, which includes extruding a rubber tube and cover over a series of threaded core pins, cutting a portion of the rubber tube to a predetermined length, and molding the predetermined length to produce the component.
    Type: Application
    Filed: May 16, 2001
    Publication date: November 21, 2002
    Applicant: Dana Corporation
    Inventor: Mark A. Leimer
  • Patent number: 6412467
    Abstract: The present invention is a valve stem seal assembly module for installation over a valve guide of an internal combustion engine. The module includes a seal retainer and an elastomeric annular seal circumferentially and frictionally contained within the retainer. The retainer is defined by an elongate cylindrical body having an annular flange at its lower end and at least one radially inwardly extending first boss at its upper end. A separate annular spring retainer has a lower radially outwardly extending second boss that interlockingly engages the first boss of the seal retainer, and an upper radially outwardly extending flange; a valve return spring extends longitudinally between and engages respective flanges of spring and seal retainers. The spring is effective to provide resilient engagement of first and second bosses prior to assembly, whereby the spring and seal retainers are telescopingly interconnected to facilitate installation of the module in a pre-assembly mode.
    Type: Grant
    Filed: April 24, 2001
    Date of Patent: July 2, 2002
    Assignee: Dana Corporation
    Inventor: Mark A. Leimer
  • Patent number: 6394462
    Abstract: This is a reliable long-lasting removable seal for attachment to the push rod opening of a service brake actuator that is to be used with a disc brake system. The seal allows the service brake actuator to enjoy the benefits of having breather holes in its housing wall while preventing any unwanted contaminants brought in through such holes from being transmitted to the attached disc brake mechanism. The seal is a hollow molded piece in the form of a tubular insert made of a slightly deformable material that fits into the central opening in the lower service brake housing through which the push rod extends. Flanges on the insert sealingly engage the wall of the service brake housing, and a central bore sealingly engages the push rod. The insert may include a separate internal bushing made of durable material which supports at least one annular seal for engaging the push rod.
    Type: Grant
    Filed: January 26, 2000
    Date of Patent: May 28, 2002
    Assignee: TSE Brakes, Inc.
    Inventors: Savvas K. Constantinides, Ted D Smith
  • Patent number: 6394463
    Abstract: The oil seal of the present invention for a valve stem includes a triple seal lip having a cam chamber side lip, a first combustion chamber side lip and a second combustion chamber side lip. Notches are provided on the second combustion chamber side lip and other notches are provided on the first combustion chamber side lip. These notches permit flow communication from the cam chamber side with the combustion chamber side. The notches provided on the combustion chamber side lip and the notches provided on the second combustion chamber side lip are placed circumferentially shifted from each other so that the notches are not axially aligned relative to the notches. Preferably, the non-notched portion is axially aligned and spaced apart relative to the notched portion.
    Type: Grant
    Filed: October 30, 2000
    Date of Patent: May 28, 2002
    Assignee: Freudenberg-Nok General Partnership
    Inventor: Takeo Otani