Composite Or Hollow Valve Stem Or Head Making Patents (Class 29/888.45)
  • Patent number: 11898473
    Abstract: A method for shaping a hollow valve preform of a pull rod (20) includes a structuring bulb (22) which is inserted into the cavity (56) of a shaft portion (44) of a valve preform. The structuring bulb (22) has an outer diameter, and has an outer structuring, whereafter the hollow shaft portion (44) is shaped, wherein at least a portion of an inner diameter of the cavity (56) is reduced below an outer diameter of the structuring bulb (22). The structuring bulb (22) is then pulled out through the shaped shaft portion (44), wherein the outer structuring is at least partially pressed into the surface of the cavity (56).
    Type: Grant
    Filed: July 22, 2020
    Date of Patent: February 13, 2024
    Assignee: Federal-Mogul Valvetrain GmbH
    Inventors: Thorsten Matthias, Dirk Schober
  • Patent number: 11506091
    Abstract: Internal combustion piston engine includes a cylinder head partly defining two ducts and a combustion chamber, and poppet valves movably arranged in the cylinder head between positions allowing or preventing flow between the combustion chamber and the ducts. The poppet valve has a stem, a valve head having a hollow interior space, a lower surface facing the combustion chamber, an upper surface including a portion adjacent the stem, and a peripheral edge section that extends from the upper surface of the valve head to the lower surface. The valve head is formed separate from but connected to the valve stem in a manner to enclose the hollow space, for example, by a circumferential welding seam. The peripheral edge section contains an arcuate contact surface that extends from the upper to lower surfaces of the valve head and without any sharp edges between upper and lower surfaces.
    Type: Grant
    Filed: February 7, 2022
    Date of Patent: November 22, 2022
    Assignee: Cyclazoom, LLC
    Inventor: Michael Kipnis
  • Patent number: 11486313
    Abstract: A valve assembly for a turbine engine includes a valve arranged in an air flow path. The valve has a shaft. The valve is movable between an open position and a closed position. An electric actuator is coupled to the shaft and is configured to move the valve between the open position and the closed position. A thermal barrier is arranged between the valve and the electric actuator.
    Type: Grant
    Filed: June 14, 2019
    Date of Patent: November 1, 2022
    Assignee: Hamilton Sundstrand Corporation
    Inventors: Francis P. Marocchini, Aaron F. Rickis, August M. Coretto, Gary R. Marconi, Scott W. Simpson, Glenn Gradischer, William E. Rhoden
  • Patent number: 11181078
    Abstract: A high-pressure pump includes a pressurizing chamber forming portion, a suction passage forming portion, a seat member, a valve member, a cylindrical member, a needle, a movable core, a biasing member, a fixed core, and a coil including a winding portion. The coil generates an attractive force between the fixed core and the movable core when the winding portion is energized. The coil includes an outer cylindrical surface and multiple inner cylindrical surfaces that have different diameters. The multiple inner cylindrical surfaces are arranged in order of increasing diameter in a direction toward a pressurizing chamber. The movable core has an end surface that faces the fixed core, and the end surface of the movable core is located between a center, in an axial direction, of a smallest diameter one of the plurality of inner cylindrical surfaces and a center, in an axial direction, of the outer cylindrical surface.
    Type: Grant
    Filed: March 24, 2020
    Date of Patent: November 23, 2021
    Assignee: DENSO CORPORATION
    Inventors: Keita Kurigami, Shinichiro Koshimoto, Yoshihito Suzuki, Hiroshi Inoue, Tatsumi Oguri, Keigo Ohata, Takayuki Makihara, Taiki Kukita
  • Patent number: 10443456
    Abstract: An exhaust valve for an internal combustion engine comprises a valve disc having a first side (14) and a second side (16), a valve stem extending from the first side of the valve disc, and an annular valve seat area (11) located at the first side of the valve disc. The annular valve seat area (11) is of a nickel-base alloy or a chromium-base alloy and has a valve seat surface. The annular valve seat area has at least a first annular portion (43) located in between two second annular portions (42). The first annular portion has lower hardness than the two second annular portions.
    Type: Grant
    Filed: July 9, 2018
    Date of Patent: October 15, 2019
    Assignee: MAN DIESEL & TURBO, FILIAL AF MAN DIESEL & TURBO SE. TYSKLAND
    Inventors: Harro Andreas Hoeg, Christian Skaaning
  • Patent number: 9683467
    Abstract: A system includes a reciprocating engine, the reciprocating engine includes a poppet valve having a first valve end and a second valve end. The poppet valve includes a valve head having the first valve end. The valve head may open and close a fluid passageway within the reciprocating engine. The poppet valve also includes a stem extending from the valve head and having a first length. The stem has the second valve end and the second valve end is substantially opposite the first valve end. The poppet valve also includes a cavity aligned with a centerline axis of the poppet valve. The cavity includes a first region disposed within the valve head and a second region disposed within the stem, and the second region has a second length that is shorter than the first length. The poppet valve further includes a metal alloy disposed within the cavity. The metal alloy is in a liquid-phase during operation of the reciprocating engine and may transfer heat from the valve head to the stem.
    Type: Grant
    Filed: December 10, 2014
    Date of Patent: June 20, 2017
    Assignee: GENERAL ELECTRIC COMPANY
    Inventor: Julian Richard Knudsen
  • Patent number: 9194263
    Abstract: Forming of a valve head portion (1) of a hollow engine valve (V) comprising a material particularly satisfactory in heat resistance is performed by cold forging. On this occasion, the material with excellent heat resistance is worked to form a valve head portion semifinished product (11) having a hollow hole (S11) whose inner diameter (?11) is equal to the maximum inner diameter (?11) of a hollow hole (S1) of a finished product of the valve head portion (1), and having a diameter-increased section (111) whose maximum outer diameter (?12) is equal to the maximum outer diameter (?12) of a diameter-increased section (1a) of the finished product. Parts of the valve head portion semifinished product other than a central part to a lower part of the diameter-increased section (111) are necked down by cold forging performed a plurality of times to obtain the finished product of the valve head portion (1). This method of obtaining the finished product is provided by the present invention.
    Type: Grant
    Filed: July 31, 2013
    Date of Patent: November 24, 2015
    Assignees: MITSUBISHI HEAVY INDUSTRIES, LTD., YOSHIMURA COMPANY
    Inventor: Hyoji Yoshimura
  • Patent number: 9015940
    Abstract: A method of manufacturing a valve for an internal combustion engine, comprises: (i) a primary step of forging a bulging portion at one end of a rod material to form a generally disk-shape valve head of the valve having a tapered periphery; (ii) an thickness adjustment step of machining an excessively thick portion of the valve head; and (iii) a secondary step of forging a peripheral region of the valve head to create radial slip deformations therein to form a valve face of the valve head. In the step of thickness adjustment, only the front end of the disk-shape valve head is machined without harming dense grain flow lines induced in the tapered face (16a) in the primary forging while advantageously saving the valve material and reducing thickness adjustment time. In the secondary forging, the hardness of the valve face is further enhanced.
    Type: Grant
    Filed: October 14, 2011
    Date of Patent: April 28, 2015
    Assignee: Nittan Valve Co., Ltd.
    Inventors: Kazunori Kurahashi, Maiku Mikami
  • Patent number: 8978248
    Abstract: A method of manufacturing a valve (10) is provided, in which an intermediate valve product having a generally disk-shape valve head is formed by a die unit (20). The valve head is then machined to have a proper thickness and a tapered face on the periphery of the disk-shape valve head. The valve head is repeatedly forged in secondary forging by means of a die unit (40) equipped with a die (42) and a press punch (48) while angularly displacing the tapered face relative to the die (42) through a predetermined angle. Since the die (42) has protruding pressing sections and grooves (46) along the circumference of the die, a uniformly deformed and hardened valve face (16) is formed on the valve head.
    Type: Grant
    Filed: October 14, 2011
    Date of Patent: March 17, 2015
    Assignee: Nittan Valve Co., Ltd.
    Inventors: Kazunori Kurahashi, Maiku Mikami
  • Publication number: 20140360452
    Abstract: A method for producing a hollow valve of an internal combustion engine may include providing a hollow valve stem, a valve cone, and a valve bottom; pushing the valve cone over the valve stem via a press fit, wherein the valve cone includes an outer surface transitioning to the valve stem to define a testing surface; and welding the valve cone to the valve stem via at least one of a laser beam and an electron beam, wherein the welding occurs such that no melting of the outer surface in the region of the testing surface of the valve cone occurs.
    Type: Application
    Filed: June 10, 2014
    Publication date: December 11, 2014
    Inventors: Peter Kroos, Christoph Luven, Alexander Mueller, Alexander Puck
  • Publication number: 20140360014
    Abstract: A method for producing a hollow valve of an internal combustion engine may include providing a valve stem and a valve disc having a valve bottom and a valve cone; placing the valve bottom centrally in a mounting of an assembly device; holding the valve stem via a holding device; concentrically placing the valve stem onto the valve bottom and rotating the valve stem together with the valve bottom; welding the valve stem to the valve bottom; pushing the valve cone over the valve stem until the valve stem contacts the valve bottom; welding the valve cone together with the valve bottom; and welding the valve cone together with the valve stem.
    Type: Application
    Filed: June 11, 2014
    Publication date: December 11, 2014
    Inventors: Peter Kroos, Christoph Luven, Alexander Mueller, Alexander Puck
  • Patent number: 8881391
    Abstract: A method for producing a hollow engine valve is disclosed which involves gradually reducing the size of the outer diameter and inner diameter of a hollow shaft of a semi-finished product sequentially inserting the hollow shaft into a plurality of molding holes having different hole shapes so as to gradually extend the length of the hollow shaft, and forming the hollow shaft into a predetermined shape by sequentially performing a drawing process. The semi-finished product is subjected to heat treatment such that the hardness thereof is equal to or less than a predetermined hardness, and the maximum thickness between the hollow shaft and an umbrella portion connected to the bottom edge of the hollow shaft is formed to be thicker than the thickness of the hollow shaft by means of a molding hole of a die which is adjusted to have a specific length and maximum inner diameter.
    Type: Grant
    Filed: September 24, 2010
    Date of Patent: November 11, 2014
    Assignees: Mitsubishi Heavy Industries, Ltd., Yoshimura Company
    Inventors: Hirokazu Morii, Hyoji Yoshimura
  • Patent number: 8713793
    Abstract: Disclosed is a method—for producing an engine valve (V) filled with metallic sodium (Na) within by means of: forming a stem section (S), which has a hollow section (H), at an intended size by successively drawing the stem section (S) using dies (D1, D2, Dx, Dx+1, Dn) in a manner so as to causing the size of the outer diameter and the inner diameter of the stem section (S) to contact in a stepwise fashion; and inserting metallic sodium (Na) into the hollow section (H) of the stem section (S)—wherein after drawing the stem section (S) until the inner diameter of the hollow section (H) of the stem section (S) has become a prescribed size (steps S11-S15) and then inserting the block-shaped solid metallic sodium (Na) into the hollow section (H) of the stem section (S) (step S16), the stem section (S) is further drawn (steps S17 and S18).
    Type: Grant
    Filed: September 9, 2010
    Date of Patent: May 6, 2014
    Assignees: Mitsubishi Heavy Industries, Ltd., Yoshimura Company
    Inventors: Hirokazu Morii, Hyoji Yoshimura
  • Patent number: 8707556
    Abstract: An injection nozzle sleeve servicing system is provided.
    Type: Grant
    Filed: August 17, 2011
    Date of Patent: April 29, 2014
    Assignee: Bosch Automotive Service Solutions LLC
    Inventors: Syed Imam, Rick Martin
  • Patent number: 8561297
    Abstract: Provided is a method for producing an engine valve by subjecting a stem portion having a hollow part to a drawing treatment using a series of dies such that the outer diameter and inner diameter of the stem portion become smaller in steps and the stem portion is thereby molded to the desired size, whereby, after the stem portion has been subjected to the drawing treatment until the inner diameter of the hollow part of the stem portion has reached a specific size, sodium metal in the form of a solid block is introduced to the hollow part of the stem portion, and a protective agent made from solid paraffin or naphthalene is also introduced to the hollow part of the stem portion such as to form a barrier between the sodium metal and the atmosphere, after which the stem portion is further subjected to a cold drawing treatment.
    Type: Grant
    Filed: May 2, 2011
    Date of Patent: October 22, 2013
    Assignees: Mitsubishi Heavy Industries, Ltd., Yoshimura Company
    Inventors: Kazutaka Maruyama, Hirokazu Morii, Hyoji Yoshimura
  • Patent number: 8522434
    Abstract: Forming of a valve head portion (1) of a hollow engine valve (V) comprising a material particularly satisfactory in heat resistance is performed by cold forging. On this occasion, the material with excellent heat resistance is worked to form a valve head portion semifinished product (11) having a hollow hole (S11) whose inner diameter (?11) is equal to the maximum inner diameter (?11) of a hollow hole (S1) of a finished product of the valve head portion (1), and having a diameter-increased section (111) whose maximum outer diameter (?12) is equal to the maximum outer diameter (?12) of a diameter-increased section (1a) of the finished product. Parts of the valve head portion semifinished product other than a central part to a lower part of the diameter-increased section (111) are necked down by cold forging performed a plurality of times to obtain the finished product of the valve head portion (1). This method of obtaining the finished product is provided by the present invention.
    Type: Grant
    Filed: September 17, 2009
    Date of Patent: September 3, 2013
    Assignees: Mitsubishi Heavy Industries, Ltd., Yoshimura Company
    Inventor: Hyoji Yoshimura
  • Publication number: 20130019474
    Abstract: Provided is a method for producing an engine valve by subjecting a stem portion having a hollow part to a drawing treatment using a series of dies such that the outer diameter and inner diameter of the stem portion become smaller in steps and the stem portion is thereby molded to the desired size, whereby, after the stem portion has been subjected to the drawing treatment until the inner diameter of the hollow part of the stem portion has reached a specific size, sodium metal in the form of a solid block is introduced to the hollow part of the stem portion, and a protective agent made from solid paraffin or naphthalene is also introduced to the hollow part of the stem portion such as to foam a barrier between the sodium metal and the atmosphere, after which the stem portion is further subjected to a cold drawing treatment.
    Type: Application
    Filed: May 2, 2011
    Publication date: January 24, 2013
    Applicants: YOSHIMURA COMPANY, MITSUBISHI HEAVY INDUSTRIES, LTD.
    Inventors: Kazutaka Maruyama, Hirokazu Morii, Hyoji Yoshimura
  • Publication number: 20120304464
    Abstract: A method for manufacturing a hollow engine valve includes inserting a half-finished hollow shaft section in sequence into die holes which have different hole shapes, and sequentially drawing so as to reduce the outer diameter and the inner diameter of the hollow shaft section and stretch its length in stages. The half-finished product is subjected to heat treatment so that the hardness thereof is lower than or equal to a predetermined level. A shaft end sealing section is formed by increasing the wall thickness of the opening end of the hollow shaft section toward the inside of the opening and the gap in the shaft end sealing section is welded.
    Type: Application
    Filed: October 6, 2010
    Publication date: December 6, 2012
    Applicants: YOSHIMURA COMPANY, MITSUBISHI HEAVY INDUSTRIES, LTD.
    Inventors: Hirokazu Morii, Hyoji Yoshimura
  • Publication number: 20120255175
    Abstract: A method for producing a hollow engine valve is disclosed which involves gradually reducing the size of the outer diameter and inner diameter of a hollow shaft of a semi-finished product sequentially inserting the hollow shaft into a plurality of molding holes having different hole shapes so as to gradually extend the length of the hollow shaft, and forming the hollow shaft into a predetermined shape by sequentially performing a drawing process. The semi-finished product is subjected to heat treatment such that the hardness thereof is equal to or less than a predetermined hardness, and the maximum thickness between the hollow shaft and an umbrella portion connected to the bottom edge of the hollow shaft is formed to be thicker than the thickness of the hollow shaft by means of a molding hole of a die which is adjusted to have a specific length and maximum inner diameter.
    Type: Application
    Filed: September 24, 2010
    Publication date: October 11, 2012
    Applicants: YOSHIMURA COMPANY, MITSUBISHI HEAVY INDUSTRIES, LTD.
    Inventors: Hirokazu Morii, Hyoji Yoshimura
  • Patent number: 8230834
    Abstract: A hollow poppet valve has a stem portion provided at one end thereof with a tip portion; a cap portion; and a flared fillet portion formed between the stem portion and the cap portion, wherein at least a part of the stem portion that connects to the fillet portion is a thin hollow cylindrical member, and the cap member is welded to the fillet portion. The cap member is thin and has an arcuate axial cross section. It is laser-beam welded to the seat-abutment portion formed at the open end of the fillet portion such that a weld bead is formed along the inner periphery of the interface of the mated ends of the members. The weld bead adds an extra weld depth to the weld, which increases the modulus of section of the welded regions of the cap member and the fillet portion and enhances their welding strength.
    Type: Grant
    Filed: October 10, 2008
    Date of Patent: July 31, 2012
    Assignee: Nittan Valve Co., Ltd.
    Inventor: Hiromitsu Endo
  • Patent number: 7941922
    Abstract: A method for manufacturing a lightweight valve is provided. The lightweight valve includes a valve stem, a hollow valve cone and a valve disk closing the valve cone, the valve stem being provided with a hollow space at an end facing the valve disk, the valve disk also having a force transmission element extending through the hollow valve cone into the stem hollow space. The method includes producing a first one-piece component forming the valve disk with the force transmission element by casting, forming and/or a powder metallurgy method, producing a second component forming the valve stem and the valve cone and joining the first and second components together and connecting them by a material, non-positive and/or positive connection.
    Type: Grant
    Filed: November 6, 2004
    Date of Patent: May 17, 2011
    Assignee: Daimler AG
    Inventors: Holger Stark, Martin Schlegl
  • Patent number: 7895989
    Abstract: A butterfly valve-type throttle valve 10 includes a valve shaft 12 extending across an intake air passage 5 of an internal combustion engine, and a butterfly-type valve body 14 for adjusting a flow rate of an intake air flowing through the intake air passage 5 by rotating in unison with the valve shaft 12. The valve body 14 is constituted by two split members 20, and is configured such that the split members 20 are coupled to each other by a welding 36, which is a coupling that uses no screw, and such that an axial hole 34 for fitting with the valve shaft 12 is formed through the coupling. A gap closing member 16 is provided on a circumferential edge portion of the valve body 14 for closing a gap between the valve body 14 positioned at a fully closed position and a passage wall surface 5a of the intake air passage 5.
    Type: Grant
    Filed: January 9, 2007
    Date of Patent: March 1, 2011
    Assignee: Aisan Kogyo Kabushiki Kaisha
    Inventor: Takashi Bessho
  • Patent number: 7716828
    Abstract: A resin main body (3) defining a bore (7) through which intake air flows, and a valve body (60) having a shaft part (20) rotatably supported by the main body (3) and a valve part (4) for opening and closing the bore (7) of the main body (3) are provided. The main body (3) is molded with the valve body (60) inserted together with a pair of bearing sleeves (24). At the time of molding the main body (3), the bearing sleeves (24) are biased in a direction opposite to the flow of the intake air with the valve body (60) being positioned in place.
    Type: Grant
    Filed: May 31, 2005
    Date of Patent: May 18, 2010
    Assignee: Aisan Kogyo Kabushiki Kaisha
    Inventors: Naoto Miyauchi, Hiroshi Asanuma, Mikiharu Yoshizaka, Masashi Ozeki
  • Patent number: 7610677
    Abstract: A method for optimizing the friction, wear, and function of an injection-molded throttle valve unit, including a throttle valve housing and a throttle valve that can move in relation to it. The throttle valve housing is injection molded out of a first plastic material inside a first cavity, then transferred to a second cavity. Bearing bushes are inserted into the throttle valve housing to constitute a hard material on hard material friction pairing between the bearing bushes and the throttle valve housing; either the bearing bushes are inserted into the throttle valve housing in a non-rotating fashion and the valve shaft rotates in relation to the bearing bushes or the bearing bushes rotate in relation to the throttle valve housing. The moving throttle valve is injection molded from a second plastic material inside the second cavity. The bearing bushes are preferably manufactured out of a metallic material and remain dimensionally stable when subjected to the injection pressure.
    Type: Grant
    Filed: September 2, 2005
    Date of Patent: November 3, 2009
    Assignee: Robert Bosch GmbH
    Inventors: Christian Lorenz, Roland Zoelch, Frank Schonder
  • Publication number: 20090266314
    Abstract: This invention provides a coolant-containing hollow poppet valve, which, in use, in consideration of a temperature distribution caused in each pert of the valve, causes a lowering in fatigue strength and creep strength in the valve at its site exposed to high temperatures falling within the tolerante of design standard, and, in consideration of required properties at the other valve sites, holds abrasion resistance and strength, and a process for producing the same.
    Type: Application
    Filed: November 15, 2005
    Publication date: October 29, 2009
    Applicant: NITTAN VALVE CO., LTD.
    Inventors: Takehiko Uchiyama, Takemi Murayama, Teruaki Ando
  • Patent number: 7556011
    Abstract: A sealing region where a valve seat and an outer peripheral surface of a enlarged diameter portion of a flare portion are contacted to each other is configured so that an end on a side opposite a combustion chamber is positioned at a position same as or on a side away from the combustion chamber than an end on a side close to the combustion chamber of a connecting region where a lid member and an inner peripheral surface of the enlarged diameter portion are connected with respect to the axis line direction.
    Type: Grant
    Filed: June 4, 2007
    Date of Patent: July 7, 2009
    Assignees: Suncall Corporation, Toyota Jidosha Kabushiki Kaisha
    Inventors: Ryuji Kishihara, Keiichiro Teratoko, Tadashi Saito, Takao Suzuki, Futoshi Fujiwara
  • Patent number: 7552911
    Abstract: A multipart composite valve for an internal combustion engine, in which a valve shaft (2) and a valve plate (4) are embodied separately while being joined together in an overlapping area (6). The invention is characterized in that at least some parts of the valve shaft (2) are provided with an intermediate layer (8) in the overlapping area (6). Said intermediate layer (8) forms an integral joint with both the valve shaft (2) and the valve plate (4) in the form of a chemical bond, the valve plate (4) being cast onto the valve shaft (2).
    Type: Grant
    Filed: August 16, 2004
    Date of Patent: June 30, 2009
    Assignee: Daimler AG
    Inventors: Holger Stark, Martin Schlegl
  • Publication number: 20090094830
    Abstract: A valve for controlling gas exchange, especially in internal combustion engines, comprises, at a valve stem, a stem end and at the other end thereof a valve cone. The valve cone and/or the valve stem are configured as hollow metal elements in such a manner that the hollow elements are entirely or partially filled with a metal foam. The interfaces between the metal and the metal foam are interlinked on the molecular level.
    Type: Application
    Filed: December 19, 2008
    Publication date: April 16, 2009
    Applicant: MARKISCHES WERK GMBH
    Inventor: Udo Hirnschal
  • Patent number: 7418781
    Abstract: A peripheral, annular groove is incorporated into a throttle valve connector in one step. A first die and a second die are then inserted into the throttle valve connector and a first plastic material is introduced into a first cylindrical cavity formed thereby in a molten state and hardened, resulting in a plastic insert. The first die and the second die are subsequently removed from the throttle valve connector and a third die and a fourth die are inserted into the throttle valve connector. A second cavity is formed therebetween and filled with a second plastic material, whereby a throttle valve is formed and is fixed during the cooling process by shrinkage on the throttle valve shaft.
    Type: Grant
    Filed: April 7, 2005
    Date of Patent: September 2, 2008
    Assignee: Siemens Aktiengesellschaft
    Inventor: Peter Volz
  • Patent number: 7328507
    Abstract: An electrically controlled throttle apparatus is constructed with a throttle body and a throttle valve that are simultaneously molded of a resinous material in the same molding dies. The throttle valve is rotatably assembled in a bore wall part of the throttle body while the throttle valve is rotated by a predetermined rotation angle ? between 45° and 135° with respect to a rotation angle 0° corresponding to its full close position. An outer circumferential periphery of the filler, which is molded to be the throttle valve in a cavity of the molding dies, is compressed by a predetermined pressure when the throttle valve and the throttle body are molded. Thus, dispersion of contraction of the throttle valve can be reduced in its molding process by adding the compression process.
    Type: Grant
    Filed: July 29, 2004
    Date of Patent: February 12, 2008
    Assignee: Denso Corporation
    Inventors: Tsuyoshi Arai, Naoki Hiraiwa, Katsuya Torii
  • Patent number: 7107683
    Abstract: A molding dies have a first shaft holding portion and a second shaft holding portion. The first shaft holding portion supports an outer surface of a metal shaft which is exposed between an axial end surface of the throttle valve and a first collar molded in the throttle body. The second shaft holding portion supports an outer surface of the metal shaft which is exposed between the other axial end surface and a second collar molded in the throttle body. The first and the second collar have a first and second shaft holes into which the metal shaft is inserted. The first and the second holding portions restrict a flowing of melted resin into the first and the second shaft holes.
    Type: Grant
    Filed: November 8, 2004
    Date of Patent: September 19, 2006
    Assignee: Denso Corporation
    Inventors: Tsuyoshi Arai, Naoki Hiraiwa, Masami Goto, Katsuya Torii, Hiroki Shimada
  • Patent number: 7107678
    Abstract: A throttle valve and the throttle body are formed substantially simultaneously in the same dies. The melted resin is injected in to a cavity through a pair of valve gates. The valve gates are symmetrically located with respect to the throttle valve shaft. A deformation of the throttle valve can be avoided because a stress concentration on the metal shaft of the throttle valve is reduced in opening the dies.
    Type: Grant
    Filed: November 8, 2004
    Date of Patent: September 19, 2006
    Assignee: Denso Corporation
    Inventors: Tsuyoshi Arai, Naoki Hiraiwa, Masami Goto, Katsuya Torii
  • Patent number: 7107679
    Abstract: A throttle valve and the throttle body are formed substantially simultaneously in the same dies. When a movable die moves away from a fixed die, a body ejector pin, a valve ejector pin, and a motor housing ejector pin simultaneously push a bore wall of the throttle body, a motor housing, and peripheral edge of the throttle the valve in a radial direction respectively. A deformation of the throttle valve can be avoided because a stress concentration on the metal shaft of the throttle valve is reduced in opening the dies.
    Type: Grant
    Filed: November 8, 2004
    Date of Patent: September 19, 2006
    Assignee: Denso Corporation
    Inventors: Tsuyoshi Arai, Naoki Hiraiwa, Masami Goto, Katsuya Torii
  • Patent number: 7089663
    Abstract: A throttle valve and the throttle body are formed substantially simultaneously in the same dies. The melted resin is injected in to a cavity through a pair of valve gates. The gas evaporated from a melted resin and remaining air in the cavity are expelled from the cavity into the atmosphere through a gas purge passage. A first and a second split lines of a first and second insert dies function as the gas purge passage. A shortshot and a corrosion generated by the gas can be avoided.
    Type: Grant
    Filed: November 8, 2004
    Date of Patent: August 15, 2006
    Assignee: Denso Corporation
    Inventors: Tsuyoshi Arai, Naoki Hiraiwa, Masami Goto, Katsuya Torii
  • Patent number: 6912984
    Abstract: A composite lightweight engine poppet valve (10, 110, 210) that has a valve head portion (12, 112, 212) and at least a portion of the stem portion (14, 114, 214) made from a titanium intermetallic material attached by way of a solid state attachment to a nickel base alloy transition piece (16, 116, 216) that is heat treated for high creep resistance. The tip portion (18, 118, 218) made from conventional material is first attached to one end of the transition piece. The transition piece (16, 116,216) is cut to a desired length and then attached preferably by friction welding to the titanium intermetallic stem portion (14, 114, 214) at a preselected distance (d1, d2, or d3). The tip portion (18, 118, 218) made from conventional material is then attached to the other end of the transition piece. In another embodiment, a second hollow stem portion (215) is attached to the transition piece (216) and the tip portion (218) is then attached thereto.
    Type: Grant
    Filed: March 28, 2003
    Date of Patent: July 5, 2005
    Assignee: Eaton Corporation
    Inventors: Sundaram L. Narasimhan, Sinharoy Shubhayu, Michael L. Killian, Majo Cecur, Jose F. Masello, Timothy L. Sheren
  • Patent number: 6851165
    Abstract: An apparatus and method for retaining a poppet seal with respect to a housing of an integrated pressure management system. The integrated pressure management system includes an aperture near a mouth of a housing, and the mouth includes a tip that is deformable so as to retain the poppet seal in the aperture. The apparatus includes a die and a collet. The die moves along an axis, and includes a face adapted to engage the mouth. The face includes a forming-over section adapted to engage the tip. The collet surrounds the die and extends along the axis between first and second axial ends. The collet includes first and second portions. The first portion extends between the first axial end and an intermediate axial position. The second portion extends between the intermediate axial position and the second axial end, and includes a plurality of segments positioned about the axis.
    Type: Grant
    Filed: September 24, 2002
    Date of Patent: February 8, 2005
    Assignee: Siemens VDO Automotive, Inc.
    Inventors: Allen Tamman, David Rene Forgeron
  • Publication number: 20030209218
    Abstract: For making an interconnection between a valve head and stem, the interconnection between these parts is made by pouring a cast alloy around the stem end. A connection and a valve are also provided.
    Type: Application
    Filed: February 27, 2003
    Publication date: November 13, 2003
    Applicant: DaimlerChrysler AG
    Inventors: Hartmut Baur, Peter Busse, Daniel Bala Wortberg
  • Patent number: 6553956
    Abstract: In a composite lightweight valve for internal combustion engines having a solid valve head provided with a center opening and a valve stem received in the center opening of the valve head in a positively locking manner, the valve components are permanently joined to one another by hot upsetting so as to be capable of withstanding the thermal and mechanical effective during engine operation.
    Type: Grant
    Filed: August 4, 2001
    Date of Patent: April 29, 2003
    Assignee: DaimlerChrysler AG
    Inventors: Pavel Hora, Martin Schlegl, Karl-Heinz Thiemann
  • Patent number: 6453867
    Abstract: A valve for an internal combustion engine has a valve stem, a valve cone and a valve disk, with the valve cone having a recess to receive the valve disk, and the valve cone and valve disk together forming a cavity. The valve disk has a lesser diameter than the recess in the valve cone, so that an insulation gap is formed between the recess in the valve cone and the valve disk edge. As a result the valve cone and valve stem are thermally insulated relative to the valve disk, which results in an advantageous, lower operating temperature at the valve cone. Particularly in the case of direct-injection internal combustion engines, this reduces the tendency to coking at the valve cone.
    Type: Grant
    Filed: September 28, 2001
    Date of Patent: September 24, 2002
    Assignee: Ford Global Technologies, Inc.
    Inventors: Helmut Hans Ruhland, Ulrich Bertram
  • Patent number: 6378543
    Abstract: In order to propose a hollow poppet valve having an excellent, high strength to weight properties by constructing it in order that no influence from welding heat is exerted onto the face, and no stress is concentrated at the welded portion, and a method for manufacturing the same valve, a fillet area 14 opened like a flare is integrally formed at one end of the cylindrical stem portion 12, and a cap is integrally welded to the open edge portion of the fillet area, wherein only the open edge portion of the fillet area 14 is made thicker than the other portions, and the face 15 is formed on the thicker portion 30. Thereby, it is possible to prevent the hardness of the face 15 from being lowered due to the cap welding heat, and stress from being concentrated at the welded portion, whereby the property of high strength to weight can be improved.
    Type: Grant
    Filed: July 17, 2000
    Date of Patent: April 30, 2002
    Assignee: Nittan Valve Co., Ltd.
    Inventor: Takemi Murayama
  • Patent number: 6354258
    Abstract: The invention relates to a hollow-stem valve for an internal combustion engine. The valve has a ratio of wall thickness to stem diameter of less than 1:3. The aim of the invention is to minimize the deformation of the valve head. To this end, the valve disk rests directly against the stem.
    Type: Grant
    Filed: August 1, 2000
    Date of Patent: March 12, 2002
    Assignee: Mahle Ventiltrieb GmbH
    Inventors: Marcus Abele, Thomas Glas, Andreas Von Känel, Walter Krepulat, Martin Lechner, Christoph Steinmetz, Frank Sticher
  • Patent number: 6308675
    Abstract: The invention relates to a gas exchange valve with a hollow space, for an internal combustion engine. The valve comprises a valve stem (3), a valve base and a valve disk (2). The valve stem and valve disk or valve stem and valve base have an approximately cylindrical, elongated hollow space which is formed by both parts. The space is sealed by welding. The aim of the invention is to improve the quality of the welding. To this end, an extra mass of the material required for sealing the hollow space is provided on the valve disk or the valve base so that no additional welding material is necessary.
    Type: Grant
    Filed: July 24, 2000
    Date of Patent: October 30, 2001
    Assignee: Mahle Ventilrieb GmbH
    Inventors: Peter Keller, Lothar Mück
  • Patent number: 6226866
    Abstract: The present invention provides a carbon-carbon (C/C) composite valve structure useful for high temperature internal combustion engines comprising (a) a carbon-carbon (C/C) composite valve stem having a flared end and a non-flared end opposite the flared end; and (b) a carbon-carbon (C/C) composite valve head applied onto the flared end of the valve stem, wherein at least one of the carbon-carbon (C/C) composite valve stem and head is coated with a high temperature resistant coating.
    Type: Grant
    Filed: April 13, 2000
    Date of Patent: May 8, 2001
    Assignee: Hitco Carbon Composites, Inc.
    Inventors: Doug Wilson, Sam Lee, Raj Mathur