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| Number | Title | Issue Date |
| 7264877 | Sliding element for seals and their process of manufacturing Sliding element for seals includes 25 to 75 weight % carbonaceous impalpable powdery aggregate of non-graphitizing carbon and/or graphitizing carbon and 20 to 50 weight % synthetic resin as binder. The sliding element is blended with the range of 5 to 25 weight % ca... | 09/04/2007 |
| 7226671 | Use of powder metal sintering/diffusion bonding to enable applying silicon carbide or rhenium alloys to face seal rotors A method for making aerospace face seal rotors reinforced by rhenium metal, alloy, or composite in combination with silicon carbide or other ceramic. The resulting rotor also is disclosed. Ceramic grains, preferably silicon carbide (SiC), are mixed with powdered met... | 06/05/2007 |
| 7172202 | Spherical annular seal member and method of manufacturing the same A spherical annular seal member (1) has a seal body (4) in which a heat-resistant material (2) and a reinforcing member (3) made of a metal wire have been compressed to fill meshes of the metal wire net of the reinforcing member (3... | 02/06/2007 |
| 7117961 | Dynamic seal with soft interface A device and method for dynamically sealing between rotatable members such as a rolling cone of a rock bit. The assembly includes a seal ring having a facing surface of a relatively hard material, such as hardened steel or tungsten carbide, and a second seal ring of... | 10/10/2006 |
| 7090919 | Sliding element for seals and their process of manufacturing Described herein is a sliding element for seals mainly comprised of 25 to 75 weight % carbon aggregate and 20 to 50 weight % thermosetting synthetic resin binder. The element has spherical pores whose diameter is in the range of from 1 to 100 μm. The pores are isol... | 08/15/2006 |
| 7080510 | Exhaust gas sealing system for turbocharger An exhaust gas sealing system for a turbocharger includes a control valve for controlling a flow of an exhaust gas in a turbine housing, a shaft extending to an outside of the turbine housing through a bearing bore provided on the turbine housing, one end of the sha... | 07/25/2006 |
| 7037477 | Silicon carbide-based porous material and process for production thereof A silicon carbide-based porous material containing silicon carbide particles (1) as an aggregate and metallic silicon (2), wherein the average particle diameter of the silicon carbide-based porous material is at least 0.25 time the average particle dia... | 05/02/2006 |
| 7011803 | Honeycomb structure and method for its manufacture A honeycomb structure having a large number of channels through along the axial direction and being defined by partition walls. A honeycomb structure containing a refractory particle to be an aggregate and metallic silicon and being porous. This honeycomb structure ... | 03/14/2006 |
| 6994351 | Mechanical seal device and method for a scraped surface heat exchanger A sealing method and apparatus is provided for sealing between a rotating shaft and a fixed housing such as found in scraped surface heat exchangers. The sealing apparatus and method includes a sealed cartridge where a gland and a trapped seal ring can be releaseabl... | 02/07/2006 |
| 6962339 | Bellows type mechanical seal A sealing system for sealing one end of a rotating shaft from fluids. The sealing system includes a resilient bellows element connected at each end to a thrust plate. The bellows acts like a compression spring forcing the thrust plates against respective sealing ele... | 11/08/2005 |
| 6946096 | Use of powder metal sintering/diffusion bonding to enable applying silicon carbide or rhenium alloys to face seal rotors A method for making aerospace face seal rotors reinforced by rhenium metal, alloy, or composite in combination with silicon carbide or other ceramic. The resulting rotor also is disclosed. Ceramic grains, preferably silicon carbide (SiC), are mixed with powdered met... | 09/20/2005 |
| 6918594 | Face seal assembly with composite stator A composite face seal has an annular seal rotor and an annular seal stator, both having a metal base portion and a radially extending flange. The flange has first and second axially facing surfaces. A first ceramic ring may be mounted to the first surface of the fla... | 07/19/2005 |
| 6802468 | Water-sealing component assembly Nut that screws together with pinion gear, and bearing that is arranged on the inner circumferential side of the nut, are provided on the front of a spinning-reel rotor. Pressing member is mounted on the front faces of the nut and bearing, such that it abuts on oute... | 10/12/2004 |
| 6655695 | Face seal assembly with composite rotor A composite face seal having an annular seal rotor with a metal base portion and a radially extending flange. The flange having first and second axially facing surfaces. A first ceramic ring is mounted to the first surface of the flange by a first braze j... | 12/02/2003 |
| 6616144 | Mechanical seal with embedded lubrication A mechanical seal for providing a seal around the drive shaft of a variable displacement swash plate type compressor used in an air conditioning system for a vehicle comprising a rotating bearing surface, an associated stationary bearing surface and a lub... | 09/09/2003 |
| 6528168 | Carbon/silicon carbide composite material A carbon/silicon composite material wherein a silicon carbide containing carbon layer which is formed by silicon and boron carbide being penetrated from a surface of a carbon substrate into the inside thereof to allow the silicon and carbon of the carbon ... | 03/04/2003 |
| 6257589 | Aerospace housing and shaft assembly A seal assembly having a first seal ring of a generally annular shape and defining radial and circumferential directions, and a second seal ring positioned in facing relation to the first seal ring. One of the first seal ring and the second seal ring incl... | 07/10/2001 |
| 6209185 | Earth-boring bit with improved rigid face seal A method of constructing an earth-boring bit provides a face seal assembly with a diamond layer having a face with recesses for enhanced lubrication. The earth-boring bit has a bit body, at least one cantilevered bearing shaft, including a base and a cyli... | 04/03/2001 |
| 6152453 | Spherical annular seal member and method of manufacturing the same In the inner portion of a spherical annular seal member (55) extending from a cylindrical inner surface (52) to an outer surface (53) formed in the shape of a partially convex spherical surface, a heat-resistant sheet member (3) having a heat-resistant co... | 11/28/2000 |
| 6045029 | Earth-boring bit with improved rigid face seal An earth-boring bit has a bit body, at least one cantilevered bearing shaft, including a base and a cylindrical journal bearing surface extending inwardly and downwardly from the bit body, and at least one cutter mounted for rotation on the cylindrical jo... | 04/04/2000 |
| 6007068 | Dynamic face seal arrangement A radial face seal arrangement is disclosed comprising a stationary seal g that is spring loaded against a seal seat affixed to a rotating shaft. The radial face seal arrangement further comprises an arrangement that not only allows for preloading of the... | 12/28/1999 |
| 5952080 | Bearing having micropores, and design method thereof A method for designing bearings, of improved performance, the load-bearing surfaces of which feature micropores about 2 to 10 microns deep and, preferably, aspect ratios on the order of 7 to 20. The hydrodynamic pressure distribution of a suite of bearing... | 09/14/1999 |
| 5909879 | Diamond film coating for mating parts At least one of the mating wear surfaces of a sliding mechanical seal is coated with diamond. The coating includes an underlayer of high resistance to wear and an overlayer with a reduced resistance to wear as compared to that of the underlayer. The reduc... | 06/08/1999 |
| 5626347 | Coning resistant face seal having a "U" shape A face seal comprising an annular carbon stator having a flat sealing surface in rubbing contact with a flat sealing surface of an annular metallic rotor. The rotor has a head portion connected to a base portion by a neck portion, that is disposed on the ... | 05/06/1997 |
| 5575486 | Grooved run-in face seal An oil seal for sealing off a fast rotating shaft (10) relative to a housing (11) comprises a first seal element (15) mounted on the shaft (10), a second seal element (18) resiliently mounted in the housing (11), both seal elements (15, 18) having coopera... | 11/19/1996 |
| 5551708 | Face ring retainer arrangement for mechanical seal A mechanical seal assembly having a face ring disposed within an axially-opening recess associated with a support ring. The support ring includes a sleevelike shroud which externally surrounds and maintains the face ring in concentric relationship. A sepa... | 09/03/1996 |
| 5544896 | Composite face seal A face seal includes an annular carbon stator having a flat surface in rubbing contact with the flat surface of a composite annular rotor. The annular rotor has a head portion and a base portion. Embedded in the head portion are high thermal conductivity ... | 08/13/1996 |
| 5443274 | Non-contact mechanical seal A stationary sealing ring (6) surrounds a rotatable shaft (2) and is fitted to, and held by, a cylindrical guide (1a) of a seal case (1). An extremely small clearance is provided between the outer peripheral surface (6b) of the stationary sealing ring and... | 08/22/1995 |
| 5441799 | Porous silicon carbide Silicon carbide sintered bodies having controlled porosity in the range of about 3-25 vol % are prepared from raw batches containing a multimodal distribution of silicon carbide particles and comprised of at least a first set of particles having one avera... | 08/15/1995 |
| 5435574 | Contactless pressurizing-gas shaft seal A high pressure sealing arrangement of the type in which a rotor sealing ring end face generates a gas pressure with a stator sealing ring end face at a functional gap between a cylindrical portion of the seal housing and the stator sealing ring bridged b... | 07/25/1995 |
| 5375852 | Rotating seal body for face type seal A rotating seal body for a face type seal having a rotor portion secured on and rotatable with a shaft and a stator portion for securement in a housing and sealing faces on each of the portions in rubbing abutment, wherein the seal has thermally conductiv... | 12/27/1994 |
| 5368314 | Contactless pressurizing-gas shaft seal A high pressure sealing arrangement of the type in which a rotor sealing ring end face defines a gas pressure with a stator sealing ring end face has a functional gap between a cylindrical portion of the seal housing and the stator sealing ring bridged by... | 11/29/1994 |
| 5186473 | Device for sealing a gap between two relatively moving surfaces A seal unit for sealing a clearance between relatively movable first and second machine components includes a low-friction, wear-resistant sealing element having a sealing face for sealingly engaging a surface of the first machine component; a spring havi... | 02/16/1993 |
| 5172918 | Secondary seal for gas turbines A secondary seal for use in a high temperature environment, including only non-elastomeric elements, includes split high temperature carbon graphite secondary seal rings axially biased by a first set of springs and radially biased by a second set of sprin... | 12/22/1992 |
| 5149249 | Shaft seal assembly, especially for high-pressure turbocompressors A turbocompressor shaft seal, especially for a high-pressure turbocompressor, has each of its gas-side and atmosphere-side slide rings biased toward a rotor ring of the shaft and associated with blocking-liquid compartments which are interconnected by an ... | 09/22/1992 |
| 5121931 | Noncontact mechanical seal A noncontact mechanical seal has a seal ring which includes a sealing face portion formed by ventilative porous materials and a ventilating portion to pass a gas of a high pressure side to the sealing face portion from the back side of said sealing face p... | 06/16/1992 |
| 5105634 | Scroll apparatus having a modified tip seal groove In a scroll apparatus having interleaving scroll wraps secured to end plates rotating about parallel, non-concentric axes to produce a relative orbital motion, a modified tip seal groove in the tip surface of at least one of the scroll wraps. In the prefe... | 04/21/1992 |
| 5080378 | Silicon carbide sintered body for mechanical seal and mechanical seal using the same A silicon carbide sintered body for a mechanical seal which has independent pores having an average pore diameter of from 10 to 40 μm and a porosity of from 4 to 13 vol %. The mechanical seal includes a stationary sliding ring and a rotary sliding ring, ... | 01/14/1992 |
| 5078411 | Variable magnetic rotary seal A variable magnetic rotary seal sealingly couples a shaft to a housing as the shaft rotates. The variable magnetic rotary seal includes a seal head, a seal ring and a mating ring. The seal head is formed out of a non-magnetic material. The seal head has a... | 01/07/1992 |
| 5037281 | Tip seal for scroll compressor A tip seal for scroll type compressors is provided to seal the tips of the scroll wraps of the stationary and orbiting scrolls. The seal consists of a "C" shaped cross sectional spring formed to fit in a slot in the tip of the scroll wraps. The spring is ... | 08/06/1991 |
