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| Number | Title | Issue Date |
| 7287756 | Film riding shaft seal The invention is a film-riding seal for a pump shaft that is resistant to the deposition of iron oxides such as hematite and goethite on the confronting, spaced apart, seal surfaces. The seal generally comprises a ceramic runner mounted on the pump shaft and an adja... | 10/30/2007 |
| 7097176 | Balanced mechanical seal assembly A mechanical seal having a single rotatable seal ring having a pair of concentric seal faces to form a radially inner seal face and a radially outer seal face. The mechanical seal also includes first and second stationary seal rings, each having a seal face, where t... | 08/29/2006 |
| 7090221 | Seal device A seal contact surface of a seal lip member and a protruding lip member of an end face seal are separated from each other and frictional heat generated at the seal lip member due to sliding motion is prevented from being transferred to the end face seal for softenin... | 08/15/2006 |
| 7021830 | Seal ring and rolling bearing unit with seal ring It is intended that the rotation resistance is decreased while the durability and seal performance are kept in the rolling bearing unit with seal ring. The most thin wall-thickness portion 30 is provided in the vicinity of the base end of the seal lip ... | 04/04/2006 |
| 6362548 | Housing with integral gasket components for a rearview mirror actuator assembly A housing member for an actuator assembly for adjusting the orientation of a mirror element in a mirror assembly provides integral weather seals and noise dampeners. The weather seals and noise dampeners are injection molded with or onto a base wall of th... | 03/26/2002 |
| 6224059 | Controlled contact pressure for scroll compressor seal An improved seal for defining a back pressure chamber in a scroll compressor includes a tab extending toward the rear face of the orbiting scroll. The tab reduces the contact force created against the rear face of the orbiting scroll by the gas pressure i... | 05/01/2001 |
| 6059293 | Split mechanical face seal with seal face fluid introducing structure A split face seal that provides fluid sealing between a housing and a rotating shaft includes first and second seal rings each having at least two seal ring segments and a radially extending seal face. The seal ring faces of the seal rings are opposed to ... | 05/09/2000 |
| 6003874 | Apparatus for sealing rotary tubes An apparatus for sealing a rotary tube drum of a furnace to another furnace component. Two concentric resilient metal ring segments are provided on a disk to comprise the sealing elements of the present invention. A plurality of springs arranged as a ring... | 12/21/1999 |
| 5865441 | Emission seal The shaft seal assembly of cartridge designed for sealing shafts entering or exiting enclosed vessels. The enclosed vessels may have a pressure different from the atmospheric pressure and the seal will normally prevent leakage from or into the vessel. The... | 02/02/1999 |
| 5820129 | Mechanical split double seals Split mechanical seal assemblies which include a pressurized fluid barrier and multiple concentric and axially aligned stationary seal rings. The stationary seal rings are in sealing relation with a rotary seal ring at their respective seal faces, and wit... | 10/13/1998 |
| 5794940 | End face seal with sacrificial wear-in excluder An end face seal especially adapted for use in severe service environments such as for sealing track pins or track rollers of crawler type tractors. The seal includes a primary annular seal ring, having a radially extending flange with a portion for conta... | 08/18/1998 |
| 5727792 | Triple cartridge seal having one inboard and two concentric seals for chemical processing pump A chemical processing centrifugal pump is provided with a triple cartridge seal arrangement including a first seal axially spaced from a pair of concentric seals. The passageway along the pump shaft between the single seal and the radially inwardmost conc... | 03/17/1998 |
| 5690471 | Water pump A water pump includes a shaft to which an impeller has been attached, and a water pump housing in which the shaft is freely rotatably supported by a plain bearing. An annular mandrel having a lip seal fixedly secured to its distal end is inserted into an ... | 11/25/1997 |
| 5642888 | Temperature and pressure resistant rotating seal construction for a pump A seal construction is provided for sealing a rotating pump shaft against passage of a fluid along its central axis. The seal construction includes front and rear sealing flanges mounted coaxially to and rotatable with the pump shaft. Stationary engaging ... | 07/01/1997 |
| 5553867 | Triple cartridge seal having one inboard and two concentric seals for chemical processing pump A chemical processing centrifugal pump is provided with a triple cartridge seal arrangement including a single inboard seal and a pair of concentric seals located rearward (i.e. outboard) of the inboard seal, the concentric seals being closest to the pump... | 09/10/1996 |
| 5531456 | Thrust cover for a centrifugal pump having dual sealing arrangement A centrifugal pump includes a liquid-filled interior space that is sealed by a thrust cover. The thrust cover is provided with an opening for the introduction of a shaft on the side of the thrust cover remote from the pump's interior space. A first counte... | 07/02/1996 |
| 5499902 | Environmentally safe pump including seal A motor driven environmentally safe pump includes a sealed motor housing (22) sealingly affixed to a sealed pump housing. The pump housing defines a fluid pumping chamber (43) in which is a fluid pumping impeller (46). A triplex rotating seal (31) is disp... | 03/19/1996 |
| 5494299 | Temperature and pressure resistant rotating seal construction for a pump A seal construction is provided for sealing a rotating pump shaft against passage of a fluid along its central axis. The seal construction includes front and rear sealing flanges mounted coaxially to and rotatable with the pump shaft. A temperature stabil... | 02/27/1996 |
| 5492339 | Rotary seal assembly A seal assembly for a vehicle wheel assembly is provided for use between its two relatively rotatable, coaxial parts to seal the inner bearing chamber. The seal assembly includes a pair of nested casings forming an S-shaped recess in cross section definin... | 02/20/1996 |
| 5492337 | Rotary spring loaded seal assembly A seal assembly for a vehicle wheel assembly is provided for use between its two relatively rotatable coaxial parts, to seal the bearing chamber. The seal assembly includes a pair of nested casings forming a C-shaped recess in cross section. An annular wa... | 02/20/1996 |
| 5484267 | Cooling device for a pump and corresponding barrier tank A centrifugal pump system including a pump having a rotating seal disposed therein, the temperature of the seal being substantially maintained at an acceptable level by circulating a temperature stabilizing liquid to and from a chamber arranged immediatel... | 01/16/1996 |
| 5411366 | Motor driven environmentally safe pump A motor driven environmentally safe pump includes a sealed motor housing (22) sealingly affixed to a sealed pump housing. The pump housing defines a fluid pumping chamber (43) in which is a fluid pumping impeller (46). A triplex rotating seal (31) is disp... | 05/02/1995 |
| 5340273 | Sealing and pumping means and methods environmentally leak-proof pump with misting chamber defined therein An environmentally leak-proof pump is provided including: an environmentally leak-proof motor housing having located therein a motor for rotatably driving a rotating shaft; a piston seal axially forward of the motor; and an oil misting chamber disposed be... | 08/23/1994 |
| 5312140 | Fluid swivel structure A fluid swivel is described, of the type which includes a ring-shaped outer structure (12, FIG. 2 ) that rotates about a ring-shaped inner structure (14), and which form an annular chamber (18) between them and a pair of gap passages (24, 26) between them... | 05/17/1994 |
| 5261676 | Sealing arrangement with pressure responsive diaphragm means A seal construction is provided for sealing a rotating shaft against passage of a fluid along its central axis. The sealed construction includes a sealing flange fixedly mounted on the shaft and rotatable with the shaft. The sealing flange has a forward a... | 11/16/1993 |
| 5217235 | Seal assembly A sealing assembly between first and second relatively rotatable parts, such as the parts of a tunnel boring machine, in which a flange on a first part has a radial sealing face engaged by the axial faces of inner and outer sealing rings mounted on the bo... | 06/08/1993 |
| 5207436 | Low friction unitized seal A unitized seal incorporates two nested steel casing, a PTFE disk with two edges in sealing contact with one casing, and an elastomer seal with two lips in sealing contact with the back of the PTFE disk. The PTFE disk provides two primary, low friction se... | 05/04/1993 |
| 5064205 | Active magnetic seal An active magnetic seal for controlling leakage from turbine shafts or other rotating equipment by the inclusion of circumferential electromagnet windings forming a dynamically controllable magnetic gap between the axial borders of rotor and stator elemen... | 11/12/1991 |
| 5024364 | Unitized oil seal and method of making a unitized oil seal A unitized oil seal having an annular inner seal case (12) having a J-shaped cross section formed by an inner wall (24) and a first axial flange (28) interconnected by a first radial flange (26). The oil seal also has an annular outer seal case (14) havin... | 06/18/1991 |
| 5018750 | Shaft seal assembly An oil seal arrangement includes a non-rotating oil ring and a rotating guide ring. A flexible oil seal is bonded to the oil ring and sealingly engages the guide ring to retain lube oil in a bearing chamber. A flexible lip seal and a spacer member rotate ... | 05/28/1991 |
| 4962936 | Sealing unit A unitized seal (A) for sealing between a stationary shaft (16) and the bore of a rotating housing is comprised of a rotary member (1) having an outer cylindrical portion (1a), a flange portion (4) extending radially inwardly from one end of the cylindric... | 10/16/1990 |
| 4900039 | Twin face seal A redundant seal arrangement employs first and second face-type seal assemblies for sealing between a housing and rotary member. A drain passage communicates with an intermediate area disposed between the first and second seal assemblies. During normal op... | 02/13/1990 |
| 4878402 | Water resistant control linkage A fluid resistant control linkage assembly having a housing with interior and exterior sides. The control linkage has a circular groove defined in the exterior side of the housing. A ring is rotatably disposed with the groove. A handle is affixed to the r... | 11/07/1989 |
| 4822183 | Thrust ball bearing with improved sealing A unitary molded plastic ball cage for a thrust bearing with axially opposed races has seals molded to the cage separator that break away at assembly for independent sealing operation.... | 04/18/1989 |
| 4813689 | Dual face seal with radially projecting annular disc A seal between a first component (1') formed by the stationary component (2'). The first component is provided with a radially outwardly projecting annular disc (3') which grips around a ring housing (4') having a U-shaped cross section and being sealed a... | 03/21/1989 |
| 4810240 | Centrifugal separator of liquids with rotating seals on the fixed upper head The centrifugal separator is provided with an inlet (1) for the liquid in the center, two exits (4 and 5) for the two phases of different density, rotating seals (13,14,15 and 21) which on contact with rings (10,11,12 and 19) resiliently fixed to the fixe... | 03/07/1989 |
| 4759554 | Mechanical face seals A mechanical face seal comprises a first seal face member associated in fixed relationship and sealed with respect to one component, a second seal face member associated in fixed rotational relationship and sealed with respect to a second component and a ... | 07/26/1988 |
| 4708711 | Pressure centrifuge A pressure centrifuge with a process chamber enclosed by a pressure housing and a drum and a screw concentrically supported. The connections between the process chamber and the atmosphere are located in the area of bearing supports and provided with rotat... | 11/24/1987 |
| 4688991 | Aseptic pump A centrifugal pump is provided including a first stationary seal ring mounted from the pump housing for slight axial and radial shifting relative thereto. The stationary seal ring includes inner and outer large and small diameter axially facing seal faces... | 08/25/1987 |
| 4669735 | Fail safe high pressure shaft seal A shaft seal assembly 10 for a high speed centrifugal pump has a primary seal (30) and a secondary seal (32). During normal operation the primary seal has its nose (38) in firm engagement with a seal face (28) and the secondary seal has its nose (42) in l... | 06/02/1987 |
