Did You Know...
...Chester Carlson was a patent agent who tired of having to make multiple copies of patent applications using the only duplication method available at the time: carbon paper. In 1959 he came up with a new copying system and took it to IBM for evaluation. The "experts" at IBM determined potential sales to be only 5,000 units because people wouldn't want to use a bulky machine when they had carbon paper. Carlson's invention was the xerography process, the company founded on the system is Xerox.
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| Number | Title | Issue Date |
| 8011669 | Valve stem seal with gas relief features 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 configu... | 09/06/2011 |
| 7900932 | Valve stem sealing assembly 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 val... | 03/08/2011 |
| 7862048 | Gasket for a valve in an internal combustion engine 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... | 01/04/2011 |
| 7828298 | Firewall sealing assembly 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 membe... | 11/09/2010 |
| 7654537 | Gasket for a valve in an internal combustion engine 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... | 02/02/2010 |
| 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 |
| 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 |
| 7134670 | Rotation shaft seal A rotation shaft seal provided with a rubber sealing portion which contacts a surface of a rotation shaft and an outer case to which the rubber sealing portion is unitedly fixed. The outer case has an inner brim portion on an inner end portion on a sealed fluid side... | 11/14/2006 |
| 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 |
| 7017915 | Stem or shaft seal arrangement 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 por... | 03/28/2006 |
| 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 |
| 6877719 | Valve shaft seal 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 o... | 04/12/2005 |
| 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 |
| 6752398 | Valve stem seal assembly 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 finger... | 06/22/2004 |
| 6679502 | Valve stem seal assembly with valve guide retainer 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 di... | 01/20/2004 |
| 6659469 | 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... | 12/09/2003 |
| 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 |
| 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 |
| 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 |
| 6394462 | Push rod seal for disc brake actuator 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... | 05/28/2002 |
| 6270082 | Coextruded valve stem seal A coextruded valve stem seal is provided that includes a sleeve having an upper and lower portion, a central vertical axis, and a generally concentric aperture. The sleeve includes an inner layer an inner layer of a resilient sealing material, such as a r... | 08/07/2001 |
| 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 |
| 6254103 | Seal A seal comprises a support member having an outer periphery of substantially circular form, and a resilient seal member mounted upon the support member, the seal member, when occupying a relaxed condition, having an outer periphery of generally circular f... | 07/03/2001 |
| 6227548 | Seal for machine parts that reciprocate relative to one another A seal such as a valve shaft seal for use with machine parts that reciprocate relative to each other includes an elastomer sealing lip adapted to rest with a radial spring preload on one machine part and a sleeve-shaped holder carrying the sealing lip and... | 05/08/2001 |
| 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 |
| 5846391 | Seal for a sensor element of a gas sensor A seal for a sensor element for a gas sensor for determining the oxygen content in a gas to be measured including exhaust gases of internal combustion engines, the seal including a metallic housing having defined therein a longitudinal bore; a sensor elem... | 12/08/1998 |
| 5657785 | Method of replacing valve packing A turbine fuel valve packing assembly including two sets of packing rings in which at least one packing ring is a V-shaped packing ring, a compression member, lantern ring, and packing gland with a sealing ring is disclosed which effectively seals turbine... | 08/19/1997 |
| 5577742 | Metallic stem seal with inclined channel and integral support member A valve stem seal comprising a cylindrical stem-sealing membrane and a membrane supporting flange. The membrane has a corrugated profile which defines one or more loop-shaped channels bounded by contact surfaces on a radially inner face and each channel i... | 11/26/1996 |
| 5553869 | Bonded valve stem seal with retainer tangs An inventive valve stem seal assembly includes a seal body bonded to a metal retainer without the need for a separate retaining ring or a garter spring. Compressive radial force between the seal body and a corresponding engagement surface of a valve stem ... | 09/10/1996 |
| 5237971 | Valve stem seal assembly A valve stem seal assembly for installation about a valve stem surrounded by a valve guide includes a sleeve-like elastomer body having the following four components: (1) an annular, outer, oil-sealing lip for sealingly surrounding the valve stem in the i... | 08/24/1993 |
| 5110142 | Valve stem oil seal A valve stem oil seal comprises a cup-shaped case engageable with the valve guide of a piston-type internal combustion engine in sealing relationship. A seal element has a radial flange portion disposed between a radial flange on the case and a support wa... | 05/05/1992 |
| 5072950 | Valve stem assembly A valve stem seal assembly comprises a valve stem seal having an external flange and a sealing lip, a washer having a tapered axial bore therein, a spring extending between the external flange of the seal and the washer, and a member engaging the seal and... | 12/17/1991 |
| 5066029 | Annular sealing apparatus An improved seal for sealing across an annulus between an inner cylindrical sealing surface and an outer cylindrical sealing surface. The seal provides a body and a flange spaced therefrom with an annular flexible arch extending between the body and the f... | 11/19/1991 |
| 5062397 | Valve stem seal A stem seal for a poppet valve in an internal combustion engine. The seal is a ring type seal received in a groove formed in the valve stem and in sealing engagement with the inside diameter of a tubular valve guide. In accordance with one aspect of the i... | 11/05/1991 |
| 5058541 | Valve operating system of internal combustion engine A valve operating system for an internal combustion engine has an engine valve having a valve shaft portion and a valve body portion at an end tip of the valve shaft portion. The engine valve is supported on the body of the engine for opening and closing ... | 10/22/1991 |
| 5050893 | Valve stem oil shield A valve stem oil shield comprises a cup-shaped deflector having a radial flange with an aperture therein for the acceptance of the valve stem. An annular grommet of U-shaped cross-section is disposed between the deflector and the valve stem to mechanicall... | 09/24/1991 |
