William F. Semple, a dentist, was awarded the first US Patent on chewing gum in 1869. His recipe contained powdered chalk.
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| Number | Title | Issue Date |
| 7383649 | Vehicle license plate frame A transparent vehicle license plate frame has an elastomeric gasket. The frame includes a periphery and an inner side for disposal adjacent to a license plate. The elastomeric gasket is disposed on the inner side near the periphery of the frame and is injection-mold... | 06/10/2008 |
| 7316386 | Valve stem seal assembly A valve stem seal assembly having a retainer body that includes an annular interior passageway defined by a wall is disclosed. At least one internal sprue extends between top and bottom ends of the retainer body and are formed within the wall. A channel is concentri... | 01/08/2008 |
| 7316402 | Segmented component seal A seal for restricting leakage of a fluid from a first chamber, through a gap between two components, to a second chamber is provided. A slot is formed in each of the two components. The slots face one another and are open to the gap. Each slot contains a longitudin... | 01/08/2008 |
| 7311311 | Seal A seal rubber 3 is placed in a first peripheral groove 2 formed in one main surface 1A of an approximately flat-plate-shaped metal body 1. A second peripheral groove 4 and multiple communicating holes 5 to communicate betwee... | 12/25/2007 |
| 7267092 | Apparatus including a preformed one-piece seal An apparatus includes a crankshaft provided with a first bearing and a second bearing. The apparatus further includes a first bearing seal positioned adjacent the first bearing and a second bearing seal positioned adjacent the second bearing. The apparatus further i... | 09/11/2007 |
| 7217081 | Cooling system for a seal for turbine vane shrouds A seal for sealing a seal groove in a shroud of a turbine vane. The seal may include a cooling system configured to pass cooling fluids through a cooling fluid supply port in a shroud, through a cooling system in which the cooling fluids contact the shroud and the s... | 05/15/2007 |
| 7210220 | Apparatus for and method of forming seals in fuel cells and fuel stacks A sealing technique is provided for forming complex and multiple seal configurations for fuel cells and other electrochemical cells. To provide a seal, for sealing chambers for oxidant, fuel and/or coolant, a groove network is provided extending through the various ... | 05/01/2007 |
| 7207220 | Fluid coupling for a chromatograph A fluid coupling comprises a compliant material, a seal gland having at least one projection configured to contact the compliant material, and a cover plate configured to compress the compliant material into the gland, thus forcing the compliant material against the... | 04/24/2007 |
| 7201381 | Metallic seal The present invention is directed to a resilient, annular, metallic seal member having a generally ājā shaped cross-section. The annular, metallic seal member includes a first end portion having a first distal end, a generally curled second end portion that exte... | 04/10/2007 |
| 7159874 | Sealing construction A sealing construction provided with a plate member of metal and a rubber member forming a sealing portion and unitedly fixed to the plate member on which a ring concave groove is formed on an obverse face. And, plural through holes, having enlarged opening end port... | 01/09/2007 |
| 7101147 | Sealing arrangement A sealing arrangement that can be employed to maintain a seal in any suitable pressure vessel including but not limited to a gas turbine engine. The sealing arrangement is forg sealing a leakage gap between at least two relatively moveable parts that are adjacent to... | 09/05/2006 |
| 7063503 | Turbine shroud cooling system A cooled turbine shroud assembly includes a first cooling path and a second cooling path adapted to provide shroud impingement air at different pressures to enhance efficiency. The cooling air is preferably acquired from a common source of secondary air. In one aspe... | 06/20/2006 |
| 7004476 | Combustion gas seal for injector A combustion gas seal for injectors having the function to prevent the leak of a combustion gas when the injector is mounted on a cylinder head of an engine, wherein the seal is made of a resin and the entire surface of the combustion gas side end of the seal is exp... | 02/28/2006 |
| 6968615 | High temperature metallic seal A metallic seal includes a cold formed substrate layer and one or more additional layers. At least one of the layers offers improved resistance to high temperature stress relaxation. ... | 11/29/2005 |
| 6916048 | Device for fluid-tight connection of a fitting to an internal combustion engine fuel injector The fitting has a high-pressure fuel supply conduit, and the injector has a hollow body having a threaded seat engaged by a threaded portion of the fitting. The fitting has a shoulder located between the threaded portion and another portion of the fitting, and the h... | 07/12/2005 |
| 6808363 | Shroud segment and assembly with circumferential seal at a planar segment surface A turbine engine shroud segment having a body including a circumferentially arcuate radially inner surface defining a circumferential arc and a radially outer surface is provided, at least at one axially spaced apart outer surface edge portion surface, with a surfac... | 10/26/2004 |
| 6733234 | Biased wear resistant turbine seal assembly A biased, wear resistant seal assembly for sealing gas flow paths in a turbine system includes a planar shim having transverse legs at each end, a flattened leaf spring to urge the shim into sealing contact with the sealing surfaces of the turbine parts, and a shim ... | 05/11/2004 |
| 6588762 | Lathe cut face seal and method for sealing irregularly shaped cavity A lathe cut sealing ring includes a substantially cylindrical ring of elastomeric material formed about a central axis. The ring includes a rectangular cross-section and has an inner diameter, an outer diameter, opposite planar upper and lower surfaces, a... | 07/08/2003 |
| 6413042 | Stationary flowpath components for gas turbine engines Cooling is facilitated in stationary flowpath components, such as turbine nozzle segments and shrouds, by providing circumferential edges defining a non-linear curvature that matches the curvature of the flow line defined by the gas flow past the stationa... | 07/02/2002 |
| 6273683 | Turbine blade platform seal A rotating blade group 90 for a turbo-machine having an improved device for sealing the gap 110 between the edges 112,114 of adjacent blade platforms 96,104. The gap 110 between adjacent blades 92,100 is sealed by a seal pin 20 its central portion 110 and... | 08/14/2001 |
| 6224064 | Cantering spring loaded fixed base butterfly valve seal A seal for use in spherical disc type butterfly valves. The seal is T-shaped on the inside diameter region where contact is made with the disc and is cupped on radially opposite sides by contoured lips on the seal retainer ring and valve body such that th... | 05/01/2001 |
| 6193240 | Seal assembly A seal assembly that seals a gap formed by a groove comprises a seal body, a biasing element, and a connection that connects the seal body to the biasing element to form the seal assembly. The seal assembly further comprises a concave-shaped center sectio... | 02/27/2001 |
| 6162014 | Turbine spline seal and turbine assembly containing such spline seal A turbine spline seal includes an elongated turbine seal member. The seal member has an elongated, imperforate, and manually-flexible first portion and a manually-rigid second portion lengthwise adjoining the first portion. The turbine assembly includes t... | 12/19/2000 |
| 6102604 | Booted seal for a ball and socket joint The invention relates to a boot seal for a ball and socket joint having a boot seal. The boot seal includes a bulb on a sealing lip. The bulb is compressed within a compression nest that is defined between cooperating radial notches that are formed on the... | 08/15/2000 |
| 6086329 | Seal plate for a gas turbine moving blade A seal plate at the platform portion of a gas turbine moving blade. The seal plate is inserted in a gap between the adjacent platforms at each end portion of a seal pin to prevent air from leaking to the outside. A groove is provided at each of four corne... | 07/11/2000 |
| 6079944 | Gas turbine stationary blade double cross type seal device Seal plates for gas turbine stationary blade inner shrouds are made in a double cross type seal structure with a view to enhance sealing ability. Seal plates 1, 2 are mutually lapped and disposed in a turbine axial direction between inner shrouds 12 of st... | 06/27/2000 |
| 6010133 | Chamber interfacing O-rings and method for implementing same Disclosed is a method for implementing a vacuum seal between an interface of a transport chamber interface port of a transport chamber and another chamber. The transport chamber being configured to mate with the another chamber in an adjacent relationship... | 01/04/2000 |
| 5975844 | Sealing element for sealing a gap and gas turbine plant A sealing element seals a gap which may be formed between two components that are movable thermally relative to one another. Each component has a component groove located one opposite the other. The sealing element is directed along a center line, in a cr... | 11/02/1999 |
| 5934687 | Gas-path leakage seal for a turbine A gas-path leakage seal for generally sealing a gas-path leakage-gap between spaced-apart first and second members of a turbine (such as combustor casing segments of a gas turbine). The seal includes a flexible and generally imperforate metal sheet assemb... | 08/10/1999 |
| 5868398 | Gas turbine stator vane seal A seal for stator vane segments within a gas turbine engine is provided which includes an axial member and an end member. The axial member includes a central portion and at least one axial joint element extending out from the central portion. The central ... | 02/09/1999 |
| 5865600 | Gas turbine rotor A baffle plate (12A) is constructed such that two belt-like elements, bent in a warped arc, are joined by spot welding (13) or brazing (14) at a central portion thereof along a central circumferential portion. Thus, even if there is a difference in a radi... | 02/02/1999 |
| 5687975 | Sealing assembly employing oppositely directed wedges and complementary recesses A sealing assembly for sealing a valve cover and a head, including an elastomeric gasket with a pair of oppositely directed wedges sealing in complementary wedge-shaped recesses in the valve cover flange and head and having a complementary wedged-shaped c... | 11/18/1997 |
| 5669612 | Metallic seal rings An API groove seal is a metal ring of cross-section like a capital letter omega arranged so that the tips of its limbs provide the sole contact with the groove base before and after compression. The central or heel region may abut on the outer side wall o... | 09/23/1997 |
| 5528972 | Bridge seal A bridge seal for a Regenerative Liquid Propulsion Gun System is compressly preloaded into interfacing gun tube cylinder and chamber cylinder seal seats providing an interference fit capable of withstanding corrosive high temperature gases and high frequ... | 06/25/1996 |
| 5507503 | Static seal in combination with interengaged components having complementary diagonal surfaces A sealing element, formed of a substantially non-extrudable material, is configured with a taper at one edge or surface thereof. The element is set in a recess which obtains between interengaged components, with the tapered end exposed, externally. The ta... | 04/16/1996 |
| 5456161 | Compact fluid operated cylinder and method A compact high pressure fluid operated cylinder and method for making same is illustrated wherein an end cap is held within the cylinder by a snap ring (E) carried within a groove at the end of the cylinder to prevent axial dislodgement outwardly from the... | 10/10/1995 |
| 5456229 | Sealing element for internal combustion engine The present invention relates to a sealing element for an internal combustion engine, preferably a two-stroke engine, having a crankcase with an upper part and a lower part in which two roller bearings for the crankshaft are disposed between the upper par... | 10/10/1995 |
| 5445393 | Penetration limiting gland and metal gasket A leak-tight seal is formed by sandwiching a metal gasket between opposing annular ridges surrounding the port to be sealed. The gasket is of metal soft enough to be penetrated by the ridges and includes an annular flange disposed in grooves adjacent the ... | 08/29/1995 |
| 5433454 | Penetration limiting gland and metal gasket A leak-tight seal is formed by sandwiching a metal gasket between opposing annular ridges surrounding the port to be sealed. The gasket is of metal soft enough to be penetrated by the ridges and includes an annular flange disposed in grooves adjacent the ... | 07/18/1995 |
| 5315483 | Housing having non-planar radial seal A housing (10) comprises a first housing member (12) having a rib (14) about a substantial portion of the periphery of the first housing member, the rib being on at least two planes (22 and 24). A second housing member (30) having protrusions (32) on port... | 05/24/1994 |