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| Number | Title | Issue Date |
| 7387178 | Self relieving seal Self relieving seals of this invention comprise an elastomeric seal body having a first sealing surface and a second sealing surface for contact with respective drill bit sealing surfaces. The seal includes a pair of external surfaces that each extend along the seal... | 06/17/2008 |
| 7201241 | Self relieving seal Self relieving seals of this invention comprise an elastomeric seal body having a first sealing surface and a second sealing surface for contact with respective drill bit sealing surfaces. The seal includes a pair of external surfaces that each extend along the seal... | 04/10/2007 |
| 7168536 | Brake master cylinder comprising plunger pistons and radial grooves inserted into the housing in order to receive sealing joints The present invention relates to a tandem master cylinder including two plunger pistons and its object is to design the cylinder as simple as possible and to render its assembly as economical as possible. This object is achieved by inserting circumferential annular ... | 01/30/2007 |
| 7083170 | Rod or piston primary seal A rod or piston primary seal, which includes a primary seal (2) facing the space (1) to be sealed and a secondary seal (3) facing away from it, in which the primary seal (2) is fitted into the groove (4), of a holding element (5... | 08/01/2006 |
| 6976548 | Self relieving seal Self relieving seals of this invention comprise an elastomeric seal body having a first sealing surface and a second sealing surface for contact with respective drill bit sealing surfaces. The seal includes a pair of external surfaces that each extend along the seal... | 12/20/2005 |
| 6974387 | Blow-molded articles and blow-molding methods for producing them A flexible bellows, such as for protecting the end of a longitudinally movable steering rack, has a hollow connector mounted on it adjacent its larger diameter fixing collar. The connector enables a connection to be made from the interior of the bellows through a si... | 12/13/2005 |
| 6858150 | Water processing device with liquid seal A water processing device for removing contaminants from water for consumption, consisting of: 1) a heat exchanger; 2) a heater; 3) a boiler chamber; 4) a liquid level control device; 5) a demister; 6) a degasser; and, 7) a self-cleaning component. A water seal to p... | 02/22/2005 |
| 6739592 | Brush seal device A brush seal device is mounted to one of two parts that move relative to each other with a gap therebetween, and seals the gap between the parts. Even when a brush seal abuts on the other part, it is deformed accordingly. As a result, wear of the brush seal is preve... | 05/25/2004 |
| 6364316 | Dual pressure balanced noncontacting finger seal An annular sealing apparatus is disclosed for disposition in cooperation with a body defining a bore and a rotating member rotatably received in the bore, the bore and rotating member bounding a high fluid pressure region and a relatively lower pressure f... | 04/02/2002 |
| 6241254 | Detachable stationary sealing device The invention relates to the sealing of detachable joints of the pipelines and manifolds by using metal elastic gaskets. A detachable stationary sealing device comprises the flanges having sealing surfaces, being tapered for one of the flanges and concave... | 06/05/2001 |
| 6196550 | Pressure balanced finger seal An annular sealing apparatus is disclosed for disposition in cooperation with a body defining a bore and a rotating member rotatably received in the bore, the bore and rotating member bounding a high fluid pressure region and a relatively lower pressure f... | 03/06/2001 |
| 6173962 | Brush seal A brush seal includes a mounting ring that carries radially inwardly directed bristles. A backing member attached to the mounting ring is positioned alongside the bristles. A chamber defined by the bristles and the backing member is pressurized with fluid... | 01/16/2001 |
| 6168162 | Self-centering brush seal A self-centering brush seal is disposed in an annular groove formed in a stationary component about a rotatable component, the stationary and rotatable components having a common axis. The brush seal includes a plurality of bristles projecting into sealin... | 01/02/2001 |
| 6158745 | Fluid pressure relief seal for liquid and fluid-tight compartments A fluid pressure relief seal for preventing the ingress of fluid into a container and for venting fluid from the container is disclosed. The fluid pressure relief seal works in conjunction with a container having a receptacle and a lid. The receptacle has... | 12/12/2000 |
| 6110045 | Hydraulic torque impulse generator A hydraulic torque impulse generator (16) of the kind having a motor rotated drive member (18;50) formed with a fluid chamber (19;53), an impulse receiving output member (20;51) coaxial with the drive member (18;50) and extending into the fluid chamber (1... | 08/29/2000 |
| 6105945 | Inverted strut damper An inverted strut damper includes an external cylinder which has an expanded midsection and a vertically moveable damper tube arranged concentrically within the outer cylinder. The outer cylinder and tube arrangement form a lubricating oil supply reservoi... | 08/22/2000 |
| 6000701 | Labyrinth seal assembly and method A labyrinth seal system and method for sealing against the flow of a fluid along a rotating member according in which a fixed housing surrounds the rotating member and one or more sealing members extend from the housing and engage the rotating member for ... | 12/14/1999 |
| 5799952 | Brush seal A brush seal element (14) comprises a mounting ring (20) that carries radially inwardly directed bristles (21). A backing ring (23) attached to the mounting ring (20) is positioned alongside the bristles (21). A chamber (25) defined by the bristles (21) a... | 09/01/1998 |
| 5738358 | Extrusion resistant hydrodynamically lubricated multiple modulus rotary shaft seal A hydrodynamically lubricated interference type rotary shaft seal suitable for environmental exclusion and high pressure lubricant retention which incorporates composite multiple modulus construction and a non-planar flexible environmental edge heel geome... | 04/14/1998 |
| 5683278 | Stern tube seal with a pressure control system to adjust to the changing draft of ocean-going ships A system to adjust to the changing draft of ocean-going ships on the aft seal system equipped with several outwardly-directed gaskets and one inwardly-directed gasket, in which, between each two outwardly-directed gaskets a ring-shaped chamber is reserved... | 11/04/1997 |
| 5662335 | Pressure balanced bellows seal A pressure balanced bellows seal for a valve or pump is disclosed. The bellows seal includes a seal bellows assembly which is operatively and sealingly attached to the valve stem, a counterbellows assembly which is substantially concentric with the seal b... | 09/02/1997 |
| 5520257 | Bit with ball plug compensator having pressure relief means A shaft boring bit has a bit body with at least one saddle member secured to the bit body. The saddle receives and supports the ends of a journal member. A cutter is mounted for rotation on the journal member and an anti-friction bearing is disposed betwe... | 05/28/1996 |
| 5434748 | Hermetic electronic equipment with flexible diaphragm, fastened to case by elastic U-shaped ring, for absorbing pressure fluctuations An electronic circuit equipment including a substantially box-shaped case main body (10) for defining a sealed interior space therein and an electronic circuit board (11) having a plurality of electronic components (12) thereon. The case main body (10) co... | 07/18/1995 |
| 5297996 | Rolling or convoluted boot for a constant velocity universal joint with pressure balance being ensured in the joint space A rolling or convoluted boot for a constant velocity universal joint has at least one pressure balancing aperture (19, 19a) located in a pressure balancing region (13, 13a). When the shaft (12) is in a stationary position, the pressure balancing region (1... | 03/29/1994 |
| 5251912 | Radially energized seal This invention relates to an adjustable packing for sealing a gap between two surfaces. The packing includes a packing member for sealing the gap, the sealing pressure thereof being adjusted by means of the elastomer, preferably two-component silicone, se... | 10/12/1993 |
| 5215312 | Housing with a pressure-equalizing element which is retained water-tightly around the edges within a housing wall opening A pressure equalizing membrane made of gas permeable, water impermeable polytetrafluoroethlyene is preassembled to a retaining ring and the ring retained within a housing wall with a watertight seal. Either a one or two part retaining ring is used as a ho... | 06/01/1993 |
| 5209495 | Reciprocating rod pump seal assembly In accordance with illustrative embodiments of the present invention, a combination stuffing box and pressure transmitter system for use with a reciprocating rod or plunger pump includes a housing that carries primary and secondary seal assemblies separat... | 05/11/1993 |
| 5137284 | Stationary seal ring assembly for use in dry gas face seal assemblies A stationary seal ring assembly for a dry gas face seal unit which comprises a face seal ring adapted to cooperate with a rotating mating ring mounted on a shaft, a shroud mounted on the periphery of the face seal ring to prevent the ring from bending or ... | 08/11/1992 |
| 5058861 | Bellows seal and method for assembling A bellows seal designed to hermetrically seal reciprocating stems from internal fluid pressure in control valves and methods of engaging and disengaging conventional valve plugs and rotatable valve stems from said bellows seal within a completely sealed e... | 10/22/1991 |
| 5052694 | Hydrostatic face seal and bearing A hydrostatic seal includes a high pressure cavity in one of two opposed sealing faces between a shaft and housing for supplying a pressurized barrier fluid between the opposed sealing faces, and an arrangement for preventing passage of the barrier fluid ... | 10/01/1991 |
| 5048981 | Modular drop-in sealed bearing assembly for downhole drilling motors A sealed bearing assembly for downhole drilling motors, which has a modular drop-in type construction. The sealed bearing assembly includes a housing portion which is secured to the drilling shaft and a housing portion which is secured to the casing. A be... | 09/17/1991 |
| 5015000 | Floating seal arrangement A rod seal for a linear hydraulic or pneumatic actuator cylinder includes a seal ring that has a bore that closely matches the diameter of the rods, proximal and distal cylindrical portions and a central annular flange. A seat in the actuator cylinder dis... | 05/14/1991 |
| 4921125 | Support assembly A support assembly (1,11,31) for mounting within a vessel (3) which may be subjected to an inwardly acting pressure differential, comprises a support member (2,12) which is in contact with an internal surface, of the vessel so as to define a recess (4,14)... | 05/01/1990 |
| 4919439 | Balanced ring seal A ring seal comprises an annular seal segment that is fixed against rotation but is axially movable relative to a fixed seal segment. The axially movable seal segment has substantially equal oppositely facing exposed radial surfaces whereby fluid pressure... | 04/24/1990 |
| 4903941 | Pressure equalizing rotary joint This invention pertains to a novel rotary joint which seeks to equalize exterior-interior pressure. This rotary joint is useful in permitting free rotary motion between two components connected by the joint in conditions where unequal pressures exist at t... | 02/27/1990 |
| 4903786 | Earth boring bit with improved two piece bearing and seal assembly An earth boring bit having an improved two piece bearing and seal assembly containing a cantilevered bearing lug that is threaded to receive a mating bearing sleeve, the lug having a transverse shoulder intersected by a mouth on the sleeve to define a bea... | 02/27/1990 |
| 4844480 | Pressure sensitive shaft sealing ring A radial shaft sealing ring includes an outer fastening ring reinforced by an insert for fixing the sealing ring in the bore of a casing through which a rotating shaft passes. The sealing ring includes a sealing lip directed toward the inside of the casin... | 07/04/1989 |
| 4795273 | Propeller shaft bearing arrangement The invention relates to a method for preventing leaks in a propeller shaft bearing arrangement including a plain bearing (2), which is lubricated with oil or water and which supports the propeller shaft (1) extending through an opening in the body (4) of... | 01/03/1989 |
| 4769992 | Reciprocation apparatus with sealing mechanism In a sealing mechanism for a reciprocation apparatus for use in a reciprocating engine having a reciprocation member (108), such as Stirling engine, oil or a fluid is enclosed in a fluid room constituted by a pair of flexible partioning members (112,113) ... | 09/13/1988 |
| 4753304 | Volume and pressure balanced rigid face seal for rock bits An earth boring bit having a rotatable cutter secured to a lubricated, cantilevered bearing shaft, sealed with an improved pressure compensating rigid face seal assembly. The assembly has a rigid ring with a radial face that opposes and engages a radial f... | 06/28/1988 |
