Seated In Groove Having Stepped Walls Patents (Class 277/586)
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Patent number: 10620079Abstract: In some aspects, waterjet cutting pressurization systems can include a water pump: (i) having a pressurization chamber and (ii) having a high-pressure water seal maintaining water pressure within the chamber; and a leak detector in fluid communication with the high-pressure water seal and configured to monitor a leak rate of a fluid from the high-pressure water seal.Type: GrantFiled: August 14, 2017Date of Patent: April 14, 2020Assignee: Hypertherm, Inc.Inventors: James E. Farnsworth, Cedar J. Vandergon, Jon W. Lindsay
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Publication number: 20140374997Abstract: The invention relates to a seal on a disk valve, in which a sealing collar consisting of elastomeric material is used for both the static flange seals and the dynamic seals on the valve disk and on the switching pin, the sealing function of the static flange seals (14) being separate from the sealing function of the dynamic disk seal.Type: ApplicationFiled: October 25, 2012Publication date: December 25, 2014Inventors: Frank Lauer, Thomas Kramer
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Publication number: 20120146292Abstract: A seal ring is provided which allows the interior of a cylinder 1 of a screw extruder to be maintained at elevated temperature and elevated pressure, thus suppressing a variation in the pressure in the cylinder 1. In a special seal ring 300 attached to a screw shaft 7 in the cylinder of the screw extruder so as to be rotatable integrally with the screw shaft 7, thus restraining a material to be treated from being fed from upstream to downstream in the cylinder, a lead groove 317 extending in an axial direction of the shaft 7 is formed in an outer circumferential surface 316 opposing with a predetermined gap to an inner circumferential surface 1a of the cylinder. The lead groove 317 serves to disturb the flow of the material to be treated passing between the outer circumferential surface 316 and the inner wall surface 1a of the cylinder 1 to complex the flow. This stabilizes feeding resistance to suppress a variation in the pressure in the cylinder 1.Type: ApplicationFiled: August 18, 2009Publication date: June 14, 2012Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHAInventors: Sadao Ikeda, Takashi Nagase
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Patent number: 7758020Abstract: A valve in which durability of a sealing member made from an elastic material can be increased and sealing capability can be advantageously maintained over a wide range from a large differential pressure to a low differential pressure. A valve (100), in which a valve disc (1) and a valve seat (2) are brought into close contact via a sealing member (5) composed of an elastic material and provided at the valve disc (1) or valve seat (2), comprises a throttle section (30) defined by the shape of at least one of the valve disc (1) and valve seat (2). The throttle section (30) narrows a flow passage formed between the valve disc (1) and valve seat (2) and is provided near the sealing member (5). The flow passage narrowed by the throttle section (30) is so set that narrowing preferentially proceeds in the flow passage in close proximity to the sealing member (5) during the closing operation of the valve disc (1).Type: GrantFiled: November 22, 2005Date of Patent: July 20, 2010Assignee: Toyota Jidosha Kabushiki KaishaInventors: Tomoyoshi Kobayashi, Norio Yamagishi
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Patent number: 7624965Abstract: A valve in which durability of a sealing member made from an elastic material can be increased and sealing capability can be advantageously maintained over a wide range from a large differential pressure to a low differential pressure. A valve (100), in which a valve disc (1) and a valve seat (2) are brought into close contact via a sealing member (5) composed of an elastic material and provided at the valve disc (1) or valve seat (2), comprises a throttle section (30) defined by the shape of at least one of the valve disc (1) and valve seat (2). The throttle section (30) narrows a flow passage formed between the valve disc (1) and valve seat (2) and is provided near the sealing member (5). The flow passage narrowed by the throttle section (30) is so set that narrowing preferentially proceeds in the flow passage in close proximity to the sealing member (5) during the closing operation of the valve disc (1).Type: GrantFiled: November 22, 2005Date of Patent: December 1, 2009Assignee: Toyota Jidosha Kabushiki KaishaInventors: Tomoyoshi Kobayashi, Norio Yamagishi
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Publication number: 20090079138Abstract: An improved replaceable valve shaft sealing system is disclosed that enables the operator to greatly reduce the maintenance needs of valves where rotational movement of a shaft, that is connected to the actual metering apparatus of the valve, actuates the opening or closing of the valve thereby regulating fluid flow. Such valves are subjected to differentiations in pressure, including the suction that occurs during pressure drops, temperature, which directly effects the valve body material and tolerances through thermal expansion, degradation of the sealing members due to presence of chemicals and absence of lubrication and wear due to the constant adjustment of the valve due to environmental variables, Current designs use O-rings to prevent the seepage of fluid into the valve body and though the rotating shaft, but current designs do little to prevent contamination of the lubrication into the fluid flow nor eliminate any of the axial loads that can cause O-rings to fail.Type: ApplicationFiled: September 23, 2008Publication date: March 26, 2009Applicant: GRISWOLD CONTROLS INCInventor: David Burton Keiser
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Patent number: 7334660Abstract: A rack bushing seal assembly for a rack and pinion steering assembly that includes a bushing, a bushing liner and a locking material. The bushing defines an annular recess on an outer surface of the bushing. The bushing liner is positioned within the bushing. The locking material is positioned within the annular recess for retaining the rack bushing seal assembly within a rack tube. A rack bushing seal assembly also includes a bushing having a first annular flange with a pressure port formed therein, and a first tube portion with a channel portion formed therein, wherein the pressure port is in fluid communication with the channel portion. The rack bushing seal assembly also includes a bushing liner having a second annular flange and a second tube portion, the bushing liner being positioned within the first tube portion of the bushing. A rack tube is placed in abutting arrangement with the first annular flange of the bushing wherein the channel portion is in fluid communication with the rack.Type: GrantFiled: March 31, 2005Date of Patent: February 26, 2008Assignee: TRW Automotive U.S. LLCInventors: Michael J. Damore, Richard A. Stoll
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Patent number: 6805360Abstract: The regulator connects to a high pressure fluid supply and regulates the pressure to a downstream apparatus. If an over-pressure occurs, it is vented to atmosphere. A segmented body reduces production cost. An elongate control stem engages a supply seal assembly and a vent seal assembly and moves axially with respect to these seal assemblies to achieve regulation and venting. Both the supply seal assembly and the vent seal assembly are bi-directional and operate when forces are applied from opposing directions.Type: GrantFiled: October 11, 2002Date of Patent: October 19, 2004Assignee: Gilmore Valve Co., Ltd.Inventors: Rodney C. Hope, Thomas W. Neugebauer
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Patent number: 6719295Abstract: In a gas turbine having a chordal hinge seal between an inner rail of each nozzle segment and an annular axially facing sealing surface of a nozzle support ring, a supplemental seal is disposed between the support ring and inner rail of the nozzle segment on a lower pressure side of the chordal hinge seal. The supplemental seal comprises a segmented annular composite tubular woven compliant seal disposed in a cavity along a sealing surface of the inner rail of the segment. The seal bears against the annular sealing surface of the nozzle support ring, which compresses the seal. Because of the compliant nature of the seal, a supplemental seal is formed on the low pressure side of the chordal hinge seal.Type: GrantFiled: December 28, 2001Date of Patent: April 13, 2004Assignee: General Electric CompanyInventors: Abdul-Azeez Mohammed-Fakir, Mahmut Faruk Aksit, Ahmad Safi, Srikanth Vedantam, Ning Fang
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Patent number: 6666458Abstract: A ceramic composite valve seal for a rotary valve assembly for use in internal combustion engines having rotary intake valves and rotary exhaust valves which have a spherical peripheral surface, the valve seal being of two-piece construction surrounding the intake or exhaust port and having an upper surface designed to contact the peripheral surface of the rotary valve, the two-piece construction defining a channel whereby compressed gases exert additional pressure on the seal enhancing the sealing contact between the seal and the valve.Type: GrantFiled: February 12, 2002Date of Patent: December 23, 2003Inventor: George J. Coates
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Patent number: 6644430Abstract: A fluid power assisted rack and pinion steering apparatus (10) for a vehicle includes a rack (40) connectable with steerable wheels of the vehicle, a housing (20) partially enclosing the rack (40) and defining a fluid chamber (39), a bushing (390 or 590) encircling the rack (40), a sleeve (420 or 620) supporting the rack (40) for sliding movement relative to the bushing (390 or 590), and a fluid tight seal member (370 or 570) for sealing the fluid chamber (39). The bushing (390 or 590) has opposite axial ends (391, 412 or 591, 612) and is secured in the housing (20) by an interference fit between an outer surface 394 or 594) of the bushing (390 or 590) and an inner surface (26) of the housing (20). The sleeve (420 or 620) extends between the bushing (390 or 590) and the rack (40). The sleeve (420 or 620) has at least one radially extending tab (431 or 631) received in a corresponding recess (418 or 618) in the bushing (390 or 590).Type: GrantFiled: March 27, 2002Date of Patent: November 11, 2003Assignee: TRW Inc.Inventors: Dennis F. Harer, Mark A. Skelton
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Publication number: 20030034614Abstract: A sealing device for a bearing includes first and second annular sealing plates (1, 2) accommodated within an annular end space between inner and outer races (11, 12). Each of the first and second sealing plates (1, 2) is of a generally L-shaped section including a cylindrical (16, 26) wall and a radial upright wall (1a, 2a), and an elastic seal lip element (38). The first sealing plate (1) is secured with the radial upright wall (1a) thereof positioned adjacent respective end faces of the inner and outer races (11, 12), and the radial upright wall (1a) of the first sealing plate (1) has a free end remote from the cylindrical wall (1b) of the first sealing plate (1) spaced a predetermined distance from the cylindrical wall (2b) of the second sealing plate (2) to thereby form a radial gap (4). The radial upright wall (1a) of the first sealing plate (1) also has an outer side face (B) set back inwardly from a free end face (A) of the cylindrical wall (2b) of the second sealing plate (2).Type: ApplicationFiled: September 26, 2002Publication date: February 20, 2003Applicant: NTN CORPORATIONInventors: Hisashi Ohtsuki, Shougo Suzuki, Eiji Tajima
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Patent number: 6467566Abstract: A fluid power assisted rack and pinion steering apparatus (10) for a vehicle includes a rack (40) connectable with steerable wheels of the vehicle, a housing (20) partially enclosing the rack (40) and defining a fluid chamber (39), a bushing (90) encircling the rack (40), a sleeve (110) supporting the rack (40) for sliding movement relative to the bushing (90), and a fluid tight seal member (70) for sealing the fluid chamber (39). The bushing (90) has opposite axial ends and is secured in the housing (20) by an interference fit between an outer surface (94) of the bushing (90) and an inner surface (26) of the housing (20). The sleeve (110) is press fit against a first recessed surface (92) in the bushing (90) of a first diameter. The sleeve (110) thereby extends between the bushing (90) and the rack (40) and engages the rack (40). The seal member (70) is located adjacent a. second recessed surface (103) in one axial end of the bushing (90).Type: GrantFiled: September 24, 2001Date of Patent: October 22, 2002Assignee: TRW Inc.Inventors: Dennis F. Harer, Mark A. Skelton
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Patent number: 6416058Abstract: The invention concerns a packing seal with its lip (1) placed in a toroidal housing (2) of a part (3) mobile in rotation and/or translation relatively to a part (4) and whereof the lip (5) ensuring the seal between the lining and the part (4) exerts on said part (4) an almost constant force whatever the pressure and whereof the support diameter can be maintained also almost constant whatever the temperature.Type: GrantFiled: August 11, 2000Date of Patent: July 9, 2002Inventor: Marian Gorski Zygmunt
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Patent number: 6402158Abstract: A non-contact plastic or rubber seal disk for bearings with improved sealing performance, which can be thrust into the seal groove of the outer ring concentrically with the bearing, with the bearing axis as center, without difficulty and so tightly as to prevent enclosed lubricant from leaking out, with no undesirable force working on the seal disk in service. The seal disk has a peripheral portion to be caught in a ring-shaped seal groove with a U-shaped section, with the peripheral portion of the seal disk in elastic contact with the inner inside wall and the outer inside wall of the groove. The seal groove is formed inside each outer ring, that is, at each end portion of the inside wall of the outer ring of the bearing and comprises an inner inside wall perpendicular to the axis of the bearing, a bottom wall, and an open-out-formed outer inside wall. The seal disk is so configured as to provide a very narrow gap between the bore wall of the seal disk and the inner ring of the bearing.Type: GrantFiled: December 21, 1998Date of Patent: June 11, 2002Assignee: Nichia Precision Industry Co., Ltd.Inventor: Toshiyuki Imazaike
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Patent number: 6322079Abstract: A seal cartridge for a face seal comprising an annular housing having an inner and outer wall and a back wall; a seal ring composite in said housing; a first resilient member disposed between said housing and said seal ring composite for providing an axial bias on said seal ring composite, said seal ring composite including a support shell and a sealing insert supported in said shell for providing a primary seal with a rotor; a second resilient member disposed between said seal ring composite and one of said inner and outer walls for providing a secondary seal; a rotor in said housing, said rotor having a sealing ring groove between said rotor and a shaft to be engaged, said groove having an inner end and an outer end; and a sealing ring disposed in said groove, said groove having a width at its inner end approximately equal to or less than the width of said sealing ring and a width at its outer end confronting the shaft greater than the width of said sealing ring for sealing the rotor to the shaft and inhibiType: GrantFiled: October 19, 1999Date of Patent: November 27, 2001Assignee: PerkinElmer, Inc.Inventor: John J. Mullaney, III
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Patent number: 6086070Abstract: A high pressure fluid seal assembly is shown and described. The seal assembly includes a seal carrier having a bore through which a reciprocating pump plunger may pass, the seal carrier having a first annular groove concentric with the bore, and carrying an annular seal. The seal carrier further includes an integral annular guidance bearing positioned in a second annular groove of the seal carrier, the second annular groove and guidance bearing contained therein being axially spaced from the first annular groove and seal contained therein. An inner diameter of the guidance bearing is smaller than an inner diameter of the seal carrier in a region between the seal and the guidance bearing. The seal is therefore supported directly by the seal carrier, although the seal carrier is spaced from the reciprocating plunger by the guidance bearing. Frictional heating in the region of the seal is therefore reduced, thereby increasing the life of the seal.Type: GrantFiled: September 18, 1997Date of Patent: July 11, 2000Assignee: Flow International CorporationInventors: Olivier L. Tremoulet, Jr., Chidambaram Raghavan
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Patent number: 5988591Abstract: A packing mounting groove formed in a spool has a wider portion of a large groove width and a narrower portion of a small groove width, and a packing that is mounted in the packing mounting groove has a first portion that fits in the wider portion and a second portion that fits in the narrower portion. A plurality of fixing protrusions formed concentrically on both sides of the second portion are pressure-contacted with a groove wall of the narrower portion to fixedly mount the packing in the mounting groove.Type: GrantFiled: October 20, 1998Date of Patent: November 23, 1999Assignee: SMC CorporationInventors: Takashi Akimoto, Masamichi Tajima, Makoto Ishikawa
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Patent number: 5934323Abstract: It is an object of this invention to reduce air resistance, which occurs when a packing is mounted in the mounting groove of a spool. Reducing this air resistance facilitates the mounting operation and prevents compressed air from being contained in a groove bottom space, and thus prevents the packing from floating. To achieve this object, a packing mounting groove 14 consisting of a wide portion 14a and a narrow portion 14b is formed in a seal land 13 in the spool. In addition, a packing 11 includes on both sides of its second portion 11b, which is fitted on the narrow portion 14b, a seal lip 18 that contacts the groove wall of the narrow portion 14b in a gas-tight manner such that air is prevented from flowing into the groove bottom. Furthermore, a lip width (f) representing the distance between both seal lips 18 and 18 under a non-seal condition is set the same as or smaller than the width (a) of the wide portion 14a of the mounting groove 14.Type: GrantFiled: February 23, 1998Date of Patent: August 10, 1999Assignee: SMC CorporationInventors: Takashi Akimoto, Masamichi Tajima, Makoto Ishikawa