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| Number | Title | Issue Date |
| RE40764 | Two-piece valve stem seal A two piece valve stem seal assembly including first and second generally cylindrical shells, one of which is partially axially nested or inserted within the other. The valve stem seal assembly also includes an engagement portion on the one of the shells for grippin... | 06/23/2009 |
| 7438036 | Oil metering valve seal 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... | 10/21/2008 |
| 7328679 | Valve guide structure A valve guide structure is provided which can suppress deterioration of a valve guide even if radial stress is applied on an upper portion of a stem of a valve. The valve guide structure is such that the stem 2 of the valve 1 is supported by an ... | 02/12/2008 |
| 7299779 | Upside-down square-up valve stem seal A valve stem seal of an internal combustion engine is described wherein the valve stem seal includes an outer peripheral surface and an inner sealing surface. The inner sealing surface minimizes ingress of a liquid upwardly from an intake port area into an overhead ... | 11/27/2007 |
| 7159847 | Supplementary control valve device for the inlet channel of a reciprocating internal combustion engine The additional control valve device has a valve element which is guided between a gantry magnet and a trapping magnet in a reversibly movable manner in the direction of the longitudinal axis. An encircling seal is arranged on that side of the housing, in which the g... | 01/09/2007 |
| 7147229 | Shaft seal assembly with retaining ring and washer A shaft seal assembly (10) features an annular carrier (14), an annular shaft seal element (16) and an annular felt washer (18) in an integral assembly that can be installed in one step using a simple push-on tool. The washer (18) ... | 12/12/2006 |
| 7086276 | Temperature correction method and subsystem for automotive evaporative leak detection systems A method and sensor or sensor subsystem permit improved evaporative leak detection in an automotive fuel system. The sensor or sensor subsystem computes temperature-compensated pressure values, thereby eliminating or reducing false positive or other adverse results ... | 08/08/2006 |
| 7086367 | Air flow arrangement for a reduced-emission single cylinder engine The present invention provides a reduced emission, single cylinder engine incorporating an air flow arrangement for improving flow efficiency of the intake air drawn into the engine and the exhaust discharged from the engine. ... | 08/08/2006 |
| 7040301 | Fuel system with integrated pressure management A fuel system supplying fuel to an internal combustion engine of a vehicle. The fuel system includes an integrated pressure management system managing pressure and detecting leaks in the fuel system. The integrated pressure management system also performs a leak dia... | 05/09/2006 |
| 7025030 | Valve stem seal assembly with changeable cap 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 grippi... | 04/11/2006 |
| 7025084 | Integrated pressure management system for a fuel system An integrated pressure management system manages pressure and detects leaks in a fuel system. The integrated pressure management system also performs a leak diagnostic for the head space in a fuel tank, a canister that collects volatile fuel vapors from the head spa... | 04/11/2006 |
| 6938877 | Valve stem seal assembly A valve stem seal assembly includes a retainer and a sealing element disposed within the retainer. The retainer includes a step and one or more installation pads. The sealing element includes a first sealing lip for sealing a valve stem, and a second sealing lip for... | 09/06/2005 |
| 6931919 | Diagnostic apparatus and method for an evaporative control system including an integrated pressure management apparatus A diagnostic appartus and method for a fuel system that supplies fuel to an internal combustion engine. The fuel system includes a fuel tank that has a headspace and a filler occluded by a removable cap, a charcoal canister in fluid communication with the headspace,... | 08/23/2005 |
| 6910500 | Integrated pressure management system for a fuel system An integrated pressure management system manages pressure and detects leaks in a fuel system. The integrated pressure management system also performs a leak diagnostic for the head space in a fuel tank, a canister that collects volatile fuel vapors from the head spa... | 06/28/2005 |
| 6901902 | Two-piece valve stem seal A two piece valve stem seal assembly including first and second generally cylindrical shells, one of which is partially axially nested or inserted within the other. The valve stem seal assembly also includes an engagement portion on the one of the shells for grippin... | 06/07/2005 |
| 6877749 | Seal for use with a movable rod An apparatus for and method of providing a seal (300) for a movable rod (111) is described. The seal includes a flexible material (303) and a rigid seat (305) that may be utilized as a spring seat. The flexible material (303) has a... | 04/12/2005 |
| 6848671 | Valve spring anti-rotation apparatus A valve stem seal assembly includes several protrusions or bumps on the bottom of a spring seat flange or on a spring wear washer surrounding the seal. The protrusions can be either cast formed or machined in place. In described embodiments, the protrusions are adap... | 02/01/2005 |
| 6764079 | Valve seal assembly with straight-walled retainer 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... | 07/20/2004 |
| 6761141 | Valve stem seal with built-in sprue 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 a... | 07/13/2004 |
| 6647943 | Valve stem seal assembly with locator system 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 g... | 11/18/2003 |
| 6609700 | Valve seal assembly with spring finger retainer 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 radiall... | 08/26/2003 |
| 6571761 | Valve stem seal assembly with integral bottom seal A valve stem seal assembly includes a retainer with an elastomeric seal body bonded to the interior of the retainer. The seal body includes first and second annular sealing members that engage a valve stem and valve guide, respectively. The seal body also... | 06/03/2003 |
| 6527275 | Molded rubber jacket with fabric reinforcement for valve stem seal 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 fabri... | 03/04/2003 |
| 6516769 | Valve seal assembly with dual finger retainer system A valve stem seal assembly incorporates a cylindrical valve stem seal retainer having an axis and an upper end about which symmetrically and circumferentially arranged, alternating upper and lower fingers have depending ends which lie in two distinct plan... | 02/11/2003 |
| 6497226 | Modular, compliant, sealing bearing assembly An improved modular, radially-compliant, redundantly-sealing journal-type bearing assembly comprising two bearing elements retained in a housing and positively loaded in opposing directions by a compression spring disposed therebetween. A shaft to be supp... | 12/24/2002 |
| 6450143 | Heavy-duty valve stem seal assembly An integral valve stem seal retainer and spring seat for a valve seal subassembly is disclosed having lower and upper portions. An annular sealing member engages the upper portions of the metal retainer and an annular flange extends radially outwardly of ... | 09/17/2002 |
| 6412467 | Valve seal assembly module with spring and retainers 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 re... | 07/02/2002 |
| 6394463 | Oil seal 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 a... | 05/28/2002 |
| 6318328 | Dry valve stem seal A valve stem seal assembly includes two annular hydraulic seals separated by a generally flat support member, where the seals are axially positioned back to back on an upper free end of a valve stem. The seals and the washer are secured along a radially o... | 11/20/2001 |
| 6269787 | Rocker cover gasket assembly with integral valve stem seals A rocker cover gasket assembly is provided that is suitable for use in connection with a valve assembly for an internal combustion engine. The rocker cover gasket assembly includes a carrier, a plurality of valve stem seals integral with the carrier and a... | 08/07/2001 |
| 6244235 | Heavy-duty valve stem seal assembly An integral valve stem seal retainer and spring seat for a valve seal subassembly is disclosed having lower, intermediate and upper portions. An annular sealing member is bonded to the intermediate and upper portions of the metal retainer and an annular f... | 06/12/2001 |
| 6209504 | Heavy-duty valve stem seal An integral valve stem seal retainer and spring seat for a reduced diameter valve seal subassembly is disclosed having lower and upper portions. An annular sealing member is bonded to the upper portion of the metal retainer and an annular flange extends r... | 04/03/2001 |
| 6205969 | Multi-seal retainer assembly and method for making the same A multi-seal retainer assembly is provided that is suitable for use in connection with a valve assembly for an internal combustion engine. The retainer assembly includes a plurality of valve stem seals and at least one connector, wherein the connector is ... | 03/27/2001 |
| 6202616 | Valve seal assembly for an internal combustion engine The present invention is a valve seal assembly used to prevent the lubricating fluid used to lubricate a valve stem and valve guide from entering the combustion chamber of an internal combustion engine. The valve seal assembly has an outer side surface th... | 03/20/2001 |
| 6148783 | Valve seal body including encapsulated metal spring seat and method for making the same An improved integral valve seal body suitable for an internal combustion engine and a method for making the valve seal body is disclosed. The valve seal body is comprised of a valve seal retainer including a cylindrical body and a metal spring seat. The v... | 11/21/2000 |
| 6125810 | Ceramic valve guide with two internal diameters Ceramic valve guides capable of withstanding high temperature ranges are typically used in high efficiency internal combustion engines. In very large engines these ceramic valve guides can be quite long and forming the required through bore in the ceramic... | 10/03/2000 |
| 6123054 | Sealing ring for reciprocating machine parts A seal for being mounted on a reciprocating machine part to seal the machine part includes a sealing element made of elastomer material. The sealing element has a sealing lip defined by two surfaces that intersect at a sealing edge for resting in a sealin... | 09/26/2000 |
| 6119645 | Valve stem seal with non-rotatable retainer A valve spring seat is disclosed having at least one annular flange in facing relationship with a surface of an engine head. The flange may be part of a valve seal retainer. A radial cut extending inwardly from the radially outermost edge of the flange to... | 09/19/2000 |
| 6006778 | Device for sensing the amount of oil in oil pans A valve stem sealing device used for preventing oil from entering a combustion chamber through a gap formed between a valve guide and a valve stem is disclosed. The valve stem sealing device comprises an annular oil seal surrounding a valve stem and an an... | 12/28/1999 |
| 5873337 | In-guide valve stem seal A two-piece valve stem guide allows the guide to be reamed in-place without damaging an installed valve seal. A first section of the guide is press fitted into an axially extending bore of an internal combustion engine component. Next, a multi-piece seal ... | 02/23/1999 |
