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| Number | Title | Issue Date |
| 7354046 | Sealing apparatus having sequentially engageable seals Advantageous seal systems are provided that include a barrier member movable relative to a shaft to allow sequential engagement of resilient seal members, e.g., lip seals, with the shaft. Movement of the barrier member may be effected manually or through introductio... | 04/08/2008 |
| 7237778 | Shut off valve assembly about a shaft of a device having an entry into a vessel The invention is a shut-off seal assembly for use with the drive assembly of fluid-containing vessels. The shut-off seal assembly first locks the seal carrier of the drive assembly in place so that it may not rotate in a clockwise or a counter-clockwise direction. T... | 07/03/2007 |
| 7134668 | Differential pumping seal apparatus A differential pumping seal apparatus includes a differential pumping seal for sealing a first space and a second space from each other in a non-contact manner, and a back up seal mechanism for sealing the first space and the second space from each other in a contac... | 11/14/2006 |
| 6979002 | Sealing apparatus having sequentially engageable seals Advantageous seal systems (1500) are provided that include a barrier member movable relative (1504) to a shaft (1550) to allow sequential engagement of resilient seal members (1506), e.g., lip seals, with the shaft. Movement of the barrie... | 12/27/2005 |
| 6782592 | Method for retrofitting a pressure molding system A system for pressure molding plastic material includes a source of hot flowable plastic material and a manifold for receiving hot flowable plastic material from the source and for transporting the hot flowable plastic material to a nozzle that is disposed within a ... | 08/31/2004 |
| 6202668 | Valve with fire-resistant seal A valve with fire-resistant seal for use in industrial piping applications. The valve includes a valve body with a valve element therein. The valve is illustrated as a ball valve, but other valve configurations could also be used. A valve stem engages the... | 03/20/2001 |
| 6152454 | Sealing device for rotating shaft The present invention relates to a sealing device for rotating shaft, intended to prevent leaks of a lubricant medium at a bearing supporting the shaft of a machine, this device including, for this purpose, between stationary parts and rotating parts of t... | 11/28/2000 |
| 6142773 | Enveloping device and vertical heat-treating apparatus for semiconductor process system The process tube of a vertical heat-treating apparatus for semiconductor wafers has a port at the bottom to be opened and closed by a lid. A sealing mechanism is arranged to seal the connecting portion between the flange of the port and the flange of the ... | 11/07/2000 |
| 6098990 | Sealing device for rotating shaft The present invention relates to a sealing device for rotating shaft, intended to prevent leaks of a lubricant medium at a bearing supporting the shaft of a machine, this device including, for this purpose, between stationary parts and rotating parts of t... | 08/08/2000 |
| 6092809 | Secondary seal for a sealing arrangement A sealing arrangement for sealing lubricating oil in and debris out of a final drive of an earth moving machine is disclosed. The sealing arrangement includes a secondary seal for use in severe environments to protect a primary oil seal. The secondary sea... | 07/25/2000 |
| 5941530 | Unidirectional environment barrier seal for subsea wellhead equipment and valves A sealing arrangement for a subsea wellhead component is provided which comprises a primary seal to prevent leakage of internal pressure from within the wellhead component and a secondary seal surrounding the primary seal to prevent entry of ambient press... | 08/24/1999 |
| 5913523 | Transmission leak repair process and plate therefor A method and device for repairing a leak between a channel member through which an axle passes and a cover member of a vehicular transmission or otherwise between inner and outer members. The diameter of the opening in the cover member for the axle is gre... | 06/22/1999 |
| 5878858 | Rotational control apparatus with selective fluid actuation supply A versatile apparatus (2) for controlling the transmission of rotational forces between first and second rotatable members preferably takes the form of a clutch that can be activated by axially shifting an internal actuation member (140) through the intro... | 03/09/1999 |
| 5860748 | Sealing device for roller bearing A sealing device for a bearing comprises a first bearing member having a peripheral shoulder portion, a second bearing member, and a seal member integrally connected to the second bearing member and having an inner peripheral portion and an inner peripher... | 01/19/1999 |
| 5820132 | Sealing device for rotating shaft When the annular seal 11 which provides sealing around a shaft 1 is damaged, something which is signalled by an oil leak, the axially mobile seal carrier 10 is pushed to the left, with the aid of the lug 13, to bring an additional seal 12 into service, th... | 10/13/1998 |
| 5755372 | Self monitoring oil pump seal A seal system for an oil well head, wherein the shaft rotates about its axis to drive a progressive cavity type pump. Primary and secondary polytetrafluoroethylene seals surround a sleeve that encircles the shaft. Pressure detectors connect to the space b... | 05/26/1998 |
| 5562294 | Backup seal for axial face seal A fluid handling machine having a shaft, a radially disposed housing, and a backup seal. During normal operation, the backup seal is concentric with and radially spaced from the shaft. The backup seal includes a first annular portion located adjacent the ... | 10/08/1996 |
| 5487550 | Secondary gas/liquid mechanical seal assembly A secondary mechanical seal assembly is used on a shaft that is rotatable within a housing to seal both gaseous and liquid medium. The assembly includes a stationary seal face element that is fixed relative to the housing and a rotating seal face element ... | 01/30/1996 |
| 5449180 | Safety device for primary pump The invention relates to a safety device that ensures longitudinal sealing of the shaft of a primary pump following the rupture of one of the seals separating the high-pressure chamber from the low-pressure chamber of the fluid in the pump, the device mad... | 09/12/1995 |
| 5303933 | Shut-off seal for a rotatable shaft A shut-off seal for a rotatable shaft penetrating a fluid-holding tank through an opening below the fluid surface. The shut-off seal has a collar secured to the shaft inside the tank and a positionable annular shut-off ring which may be moved into engagem... | 04/19/1994 |
| 5292137 | Rotary shaft sealing method and device A dry-face sealing method for preventing leakage around a rotary shaft uses an annular rigid seal having a smooth sealing surface and an annular resilient seal having a projecting sealing edge aligned coaxially therewith. The annular resilient seal has a ... | 03/08/1994 |
| 5267736 | Sealing apparatus for rotating shafts, in particular stern tube seal for the propeller shaft of a ship A sealing apparatus for rotating shafts, in particular a stern tube seal for a propeller shaft of a ship with or without shaft bushings, with aligned gaskets resting on the shaft and located in a stationary support system, preferably of an axial face seal... | 12/07/1993 |
| 5209497 | Sealing apparatus for rotating shafts, in particular stern tube seal for the propeller shafts of a ship Sealing device for rotating shafts, in particular stern tube seal for the propeller shafts of a ship, with a main seal and a backup seal, in which the main seal is designed as a rotating mechanical seal or as a lip seal, and the backup seal is designed as... | 05/11/1993 |
| 5171024 | Reactor coolant pump shaft seal utilizing shape memory metal A shutdown seal is provided in a pump for activation to prevent passage of fluid along a shaft relative to a fluid-containing housing of the pump through which the shaft extends. The shutdown seal is an annular member having a mounting flange and a sealin... | 12/15/1992 |
| 5129782 | Turbo-machine sealing device A sealing device has two circumferentially fixed sealing rings which, together with a common ring groove in a turbo-machine shaft for both sealing rings, result in a labyrinth seal between the sealing gas space and the lubricating-oil relief space and bet... | 07/14/1992 |
| 5074568 | Shaft seal The shaft seal between a fixed housing wall (2) and a revolving shaft (1) consists of a collar (6) fixedly connected to the shaft (1), respectively one leg of the U-shaped sealing rings (69, 71) pressing against this collar. The cavities (14, 15) of the s... | 12/24/1991 |
| 5071139 | Pressure activated emergency/temporary seal A pressurizable seal assembly provides a temporary seal which allows continued operation of a device, for example a pump, when the primary seal is removed for repair or replacement. The seal assembly includes a seal housing having a selectively pressuriza... | 12/10/1991 |
| 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 |
| 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 |
| 4865333 | Seal protection apparatus The seal protection apparatus is intended to provide protection for a main mechanical seal. It comprises a first seal ring fast on the shaft of a pump and a second seal ring which is connected to the casing of the pump by means of a flexible, annular diap... | 09/12/1989 |
| 4817846 | Transmission shaft sealing arrangement In a seal arrangement between a stationary and a rotating machine part, for example, between a transmission housing and a hollow sleeve exiting from the housing, there are arranged two V-rings oriented concentrically to one another in the one machine part... | 04/04/1989 |
| 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 |
| 4658847 | Bimetallic C-ring seal A self-actuating temperature sensitive seal comprised of a bimetallic C-ring. Differences in the relative rates of thermal expansivity of the inner face and the outer face of the C-ring cause the C-ring to expand or contract in response to temperature var... | 04/21/1987 |
| 4647076 | High pressure fluid swivel A fluid swivel is described, which is especially useful for carrying hydrocarbons at high pressures between stationary and rotating walls of a swivel. The swivel forms a fluid-carrying annular chamber and a pair of gap-like passages lying between the wall... | 03/03/1987 |
| 4625977 | Convertible, stand-by rotary seal assembly A seal assembly has a pair of relatively rotatable sub-assemblies adapted to be attached and sealed respectively to relatively fixed and relatively rotatable members to confine the flow of fluid through the space between the members to a restricted passag... | 12/02/1986 |
| 4624465 | Pneumatic safety seal joint made of elastomer with internal septum A pneumatic safety seal joint, made of elastomer, generally designed to be installed in a slot or groove, this joint having an inflatable internal volume under the pressure of a fluid, and an external seal surface. The joint has an internal volume with ma... | 11/25/1986 |
| 4570942 | Dual diameter valve stem packing A "fire-resistant" packing arrangement (30) for use with linear motion or rotary motion shafts (20) characterized by a stepped dual diameter packing chamber provided by successive enlargements of the stem bore (22). A primary packing assembly (31) dispose... | 02/18/1986 |
| 4568091 | Leak repair clamp with flexible lip seals A sealing member including a seal retainer sleeve provided in segments and two spaced apart grooves defined all around the inner wall of the sleeve. Sleeve is adapted to be fitted around outside of a cylindrical surface on each side of an opening. An elas... | 02/04/1986 |
| 4552368 | Backup seal with bush in form of radially floating washer A backup seal for a main seal (not shown) sealing a rotary shaft (10) to a housing (12) comprises a rotary seal element (20) sealed (22) to the shaft (10) and a stationary seal element (16) sealed (18) to the housing (12). The seal elements (16,20) have o... | 11/12/1985 |
| 4548389 | Redundant high-pressure seal for fluid spring A seal between a piston rod and a housing in which the piston reciprocates for preventing the escape of compressed fluid from the housing. A fixed sealing member engages the piston rod adjacent the housing wall, and a floating sealing member engages the p... | 10/22/1985 |
