Did You Know...
...In 1790, the cost to obtain a patent was between $4 and $5.
PatentStorm News
Make the Most of Our Site
See this month's Top Inventors and Most Cited Patents.
Stay on top of the latest innovations by subscribing to an RSS feed.
Registered users: Manage your profile.
| Number | Title | Issue Date |
| 8100407 | Packing cartridges and pressure-dampening elements for plunger-type pumps A package cartridge is provided for use in the maintenance of a packing bore for a plunger-type pump. According to one aspect, a packing cartridge includes: a generally-cylindrical sleeve adapted to be at least partially positioned in the packing bore, a first abutm... | 01/24/2012 |
| 7766340 | Two-piece sealing device Rings described herein can be installed in a stuffing box assembly about a rotary element without the need for dismantling the apparatus. A system can comprise at least two rings. Each ring can have a first section and a second section. The first section of the ring... | 08/03/2010 |
| 7357373 | Pilot-type two-port valve A two-port valve includes a valve part configured to open and close a valve seat in a liquid flow path connecting a first port and a second port by a valve member and a pilot-type valve driving mechanism to open and close the valve member through a rod. The rod pass... | 04/15/2008 |
| 7341258 | Cammed seal assembly with sealing ring having an angled leg portion and foot portion with elastomeric energizer element A seal assembly seals first and second operational surfaces spaced apart by a gap. The first surface includes a seal groove having a base surface and first and second side surfaces. A sealing element in the seal groove has a foot portion extending parallel to the ba... | 03/11/2008 |
| 7303179 | Split packing follower for use with valves Split packing followers for use with valves are disclosed. A disclosed packing follower includes a first member having a first portion of a flange and a first portion of a curved wall extending substantially perpendiculary from the first portion of the flange to def... | 12/04/2007 |
| 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 |
| 7191843 | Valve apparatus with seal assembly A valve apparatus. The valve apparatus is disposed within a well so that an annulus is formed between an outer portion of the valve and an inner portion of the well. In one preferred embodiment, the valve apparatus comprises an outer mandrel containing an annulus po... | 03/20/2007 |
| 7178806 | Cinchpac self-loading rotary shaft seal A seal for a conveyor drive which has an elastomer which is compressed between a cap ring and a housing. ... | 02/20/2007 |
| 7121554 | High-pressure sealing In a high-pressure cylinder with an axial plunger, a seal assembly for scaling the gap between the cylinder wall and the plunger. The assembly is disposed in an annual recess in the wall having an open end and a bottom opposite thereto, and comprises a plunger-seali... | 10/17/2006 |
| 7121716 | Mixing equipment sealing device A shaft sealing arrangement for sealing bores around a pair of stirrer shafts that emerge through a wall of an associated mixing vessel includes a pair of generally cylindrical shaft sealing assemblies designed to be carried on adjacent stirrer shafts, each gland as... | 10/17/2006 |
| 7118114 | Dynamic sealing arrangement for movable shaft A dynamic sealing arrangement for preventing leakage of a fluid along a shaft includes multiple seals and pressurized barrier sealant. According to one aspect, at least three seals are arranged along the shaft with pressurized barrier sealant between the first and s... | 10/10/2006 |
| 7111821 | Control valve, in particular plug valve with sealing system The present invention relates to a plug valve comprising a valve body and a shutter that can be actuated, in the form of a segment of a sphere provided with a mobile shaft in rotation and/or translation, said valve also comprising a double-barrier sealing system at ... | 09/26/2006 |
| 7110827 | Electrical connectors for medical lead having weld-less wiring connection Low resistivity, implantable electrical connectors and biomedical leads having the connectors mechanically coupled in a non-welded attachment to low resistivity wires to extend implanted device battery life. One electrical connector includes an electrically conducti... | 09/19/2006 |
| 7055593 | Well stuffing box packing Disclosed herein are apparatus and methods for sealing a well stuffing box. ... | 06/06/2006 |
| 7048254 | Low-leakage valve apparatus A low-leakage valve apparatus which reduces fugitive emissions from valves to the ambient atmosphere. A secondary packing chamber or gland is installed on an existing valve to intercept leakage past the valve's original primary packing gland, which otherwise would e... | 05/23/2006 |
| 6935771 | Mixer seal and bearing apparatus and method An assembly for supporting a mixer shaft in an opening in a vessel wall has a support mounted to the vessel wall around the opening and a seal ring supported by the support that engages a circumference of the mixer shaft with a sealing contact. A first bearing is mo... | 08/30/2005 |
| 6902383 | Apparatus containing cooling and warming devices for the preparation of a polymer solution A novel apparatus for the preparation of a polymer solution includes a stirring device, an extruder connected to the stirring device, a cooling device connected to the extruder, and a warming device connected to the cooling device. The extruder is a fiber or membran... | 06/07/2005 |
| 6869079 | Stackable metallic seal and method of using same A seal for sealing between a first component and a second component includes a first metallic element comprising a plurality of sealing profiles and defining a groove therein and a second metallic element comprising a plurality of sealing profiles and a protrusion m... | 03/22/2005 |
| 6840520 | Valve plug seal assembly A seal assembly is adapted for use in a valve having a trim cage with an inner surface extending along an axis and a plug sized to fit inside the trim cage inner surface, wherein the plug is adapted to move along the axis. The seal assembly includes a spring-loaded ... | 01/11/2005 |
| 6834862 | Shaft sealing system for a rotary mechanical device A sealing system to be inserted into the seal cavity of a rotary mechanical device to provide a seal and a bearing surface to eliminate whip in a rotating shaft. The sealing system includes a split bushing element to allow easy installation over the shaft. The bushi... | 12/28/2004 |
| 6640823 | Fitting A fitting including a housing (2), a rotatable body (4) which is situated in the housing and which may advantageously be constructed in the form of a conical plug, a bushing (18) provided in the housing to floatingly mount and seal the rotatable body (4),... | 11/04/2003 |
| 6626438 | Seal assembly for telescopic hydraulic cylinder A multi-tube hydraulic cylinder includes annular seal assemblies joining adjacent tubes. Each assembly includes an annular primary seal member and an annular base seal member. The primary seal member is formed from relatively soft elastomer and includes i... | 09/30/2003 |
| 6578850 | Dynamic seal for a drive shaft A dynamic seal for a drive shaft including a seal housing with at least one inlet for injecting a fluid, (i.e., a liquid or gas) into the seal. The seal also has an expeller device, such as an expeller ring mounted on the drive shaft, for expelling the in... | 06/17/2003 |
| 6571819 | Method of installing valve seals and a two-piece tool therefor A method of installing a valve seal at the base of a valve stem of an automotive internal combustion engine is disclosed. A two-piece tool consisting of first and second tool parts is employed for carrying out the method. The first tool part is used to pu... | 06/03/2003 |
| 6561517 | Packing device for rotary valves A packing device, for sealing a longitudinal shaft against leakage of a pressurized fluid, having an elongate valve housing with an annular internal chamber about a coaxial rotatable shaft. The chamber has an inner end with an annular stationary packing s... | 05/13/2003 |
| 6502827 | Sealing device and a method of repairing/replacing sealing devices A sealing device (20, 80, 90), optionally in the form of a kit is provided for sealing about a rotatable member such as a shaft (22). The sealing device or the kit includes a follower housing (32) for mounting about the rotatable member (32) with an axial... | 01/07/2003 |
| 6382633 | Shaft seal device using gland packing A shaft seal apparatus that exhibits a good and reliable sealing performance, even when a rotating shaft undergoes axial vibration, eccentric revolution, or the like. This shaft seal apparatus has gland packings (2) stuffed in a sealed space (10) formed b... | 05/07/2002 |
| 6375196 | Sealing system for a screw conveyor and drive A system is provided for sealingly coupling a gear reducer to a driven machine, such as a screw conveyor. The gear reducer includes a sealing assembly disposed in a bore of the gear reducer housing about an output member, such as an output hub. An adapter... | 04/23/2002 |
| 6354566 | Live loaded valve stem packing with shape memory alloy option Live loaded valve stem packing wherein grafoil packing is molded into a metal cap that prevents extrusion of the packing, and has live loading built into the metal cap. This metal cap can be conventional flat spring materials (17-7PH S.S. or 302 S.S.) or ... | 03/12/2002 |
| 6325387 | Packing gland assembly A packing gland assembly mountable on a shaft extending through an opening in a wall member of an apparatus consisting of a main housing member mountable on the shaft having an opening for receiving the shaft therethrough, the opening being provided with ... | 12/04/2001 |
| 6318729 | Seal assembly with thermal expansion restricter A seal assembly having a first seal with a first mating surface and a recess in the first mating surface, and a second seal having a second mating surface and a recess in the second mating surface. The first mating surface of the first seal is adjacent to... | 11/20/2001 |
| 6231048 | Mechanical seal incorporating a pusher ring for safe and easy assembly and repair An improved mechanical seal incorporating a pusher ring to hold the integral parts of the seal together, in lieu of a typical retaining ring and snap ring aligning and compressing the gland plate. The improvement consists of a pusher ring, fixedly attache... | 05/15/2001 |
| 6220604 | Self-adjusting interlocking bushing A self-adjusting interlocking throat bushing is provided in which mating concentric bushing rings are provided with an interlocking annular slot in the outer bushing ring and an annular ridge at the periphery of the inner bushing ring to hold the two ring... | 04/24/2001 |
| 6212999 | Automatic throat packing torque clip A reciprocating piston pump is provided with an automatic throat positive packing torque clip thereby providing consistent and extended pump life.... | 04/10/2001 |
| 6168161 | Rotary valve shaft seal A shaft seal having spacers positioned between the packing follower and the body of a valve. The spacers are flat, hard members of a certain thickness which allow maximum tightening of the packing fasteners and determine the maximum pressure the packing f... | 01/02/2001 |
| 6161838 | Cartridge seal stack A cartridge seal stack utilizes a plurality of rotary cartridge seals each including a cold flowable plastic ring having a body for sealably engaging a housing bore and a lip for sealably engaging a shaft rotating within the housing bore. A spring is prov... | 12/19/2000 |
| 6126171 | Sealing cartridge An improved sealing cartridge for use in a reciprocating plunger pump which includes a low pressure seal, a vacuum seal, and an oil seal within a unitized cartridge assembly to facilitate servicing and/or replacing the various seals with minimal effort an... | 10/03/2000 |
| 6098986 | Seal A seal (14) for use between a pair of substantially concentric elements (10 and 11) capable of relative movement with respect to each other, said seal comprising a sealing element (17) having a configuration of a helix wherein the opposed axial faces of t... | 08/08/2000 |
| 6076831 | Switch fitting A switch fitting, in particular a cock, ball cock, flap or likewise, with a switch rod for a switch member, which is rotatably and slightly tiltably guided in a switch shaft bore of a fitting housing and which has a sealing surface which is formed on a co... | 06/20/2000 |
| 6003875 | Gland assembly for use with mechanical seal A mechanical seal assembly having multiple compression spring assemblies that are used to bias a stationary seal into sealing engagement with a rotating seal, the springs in the spring assemblies being supported on their internal diameter and having their... | 12/21/1999 |
