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| Number | Title | Issue Date |
| 8074967 | Gate valve for vacuum and seal member used therefor A gate valve for vacuum capable of preventing a seal member from being cracked or particles from being produced due to a stress concentration even if the seal member is repeatedly compressed in the state that the adhesive agent is separated from the open side of a s... | 12/13/2011 |
| 8016265 | Valve assembly having a unitary valve sleeve A valve assembly preferably including a housing having a recess and a flange face and a valve sleeve disposed within the recess. The sleeve preferably includes an annulus having an outer surface and an inner surface that defines a passageway about a central axis, th... | 09/13/2011 |
| 7992840 | Pressure rated oil field gate valve The disclosure provides an efficient design for a pressure rated oil field gate valve that meets the challenges of providing a quality product with minimal increase in price due to the design. It minimizes weight increase in the valve body over valves not meeting st... | 08/09/2011 |
| 7988129 | Floating slit valve for transfer chamber interface The present invention generally comprises a floating slit valve for interfacing with a chamber. A floating slit valve moves or “floats” relative to another object such as a chamber. The slit valve may be coupled between two chambers. When a chamber coupled with ... | 08/02/2011 |
| 7845620 | Outfeed gate with wear strip assembly An outfeed gate includes a fixed plate and a sliding plate, wherein bearing strips protect the fixed and sliding plates from excessive wear as they slide over each other. The outfeed gate safely accepts material from a high temperature and pressure environment to an... | 12/07/2010 |
| 7815170 | Valve assembly having a reinforced valve seat A knife gate valve includes a reinforced valve seat which prevents displacement of the valve seat when the valve is opened and closed. The valve includes a valve body defined by a first and second body halves. The valve halves are assembled to define a flow path, a ... | 10/19/2010 |
| 7628381 | Method for replacing seals in recreational vehicles gate valves without removing valve housing from plumbing The present invention provides a method for replacing seals in recreational vehicles gate valves without removing valve housing from plumbing. The method for replacing blade seals in a gate valve features coupling a valve housing of the gate valve to suitable plumbi... | 12/08/2009 |
| 7458559 | Bi-directional knife gate valve apparatus and method An improved method and apparatus for a valve assembly features a valve body, a first seat ring mounted in the valve body, a second seat ring mounted in the valve body, and a retractable blade gate slideable in between the first seat ring and the second seat ring. Th... | 12/02/2008 |
| 7422653 | Single-sided inflatable vertical slit valve A vacuum chamber having a gate valve including a chamber housing defining an internal vacuum region and first and second openings through the chamber housing and a gate valve secured to the chamber housing. The gate valve includes a sealing door located in the proce... | 09/09/2008 |
| 7350766 | Knife gate valve with multi-piece elastomer liner and/or o-rings at flange interface A knife gate valve comprising a two-piece valve body, a knife gate, an elastomeric transverse seal, an elastomeric perimeter seal, and a pair of elastomer liners. Each elastomer liner is positioned between the knife gate and one of the mating valve body halves and d... | 04/01/2008 |
| 7341238 | Device for locking out a pressurized storage container and method for the same A device and method for locking out an explosion suppressor that includes a discharge valve with a load end and a discharge end. The load end and the discharge end define a discharge path therethrough. The discharge valve includes a side opening transverse of the di... | 03/11/2008 |
| 7325783 | Valve seat edge relief profile A valve seat has an outer surface, a rearward end, a face and a forward end. A passage extends from the rearward end to the face. A valve element slidingly contacts the face. Stress relief flanges are located on the face in areas of high bearing stress. Each flange ... | 02/05/2008 |
| 7322251 | Method and apparatus for measuring a parameter of a high temperature fluid flowing within a pipe using an array of piezoelectric based flow sensors A method, apparatus and system are provided to measure the process flow of a fluid or medium traveling in a pipe. The system and apparatus feature a standoff and piezoelectric-based sensor arrangement having a plurality of standoffs arranged on a pipe and a pluralit... | 01/29/2008 |
| 7306201 | Gate valve with tongue and groove or bridging seal to annular seat elements A gate valve for controlling fluid flow, in which a valve body forms a cylindrical flowbore and includes a gate cavity intersecting the flowbore to provide opposed openings into the flowbore. Seat pockets are formed in the opposed openings, each with a radial base a... | 12/11/2007 |
| 7261276 | Flow regulator valve An apparatus such as a multiple orifice valve (MOV) for controlling a flow of pressurized fluid. A housing directs the flow from an inlet to an outlet and supports an interior stationary surface. A moveable surface selectively impedes the flow and is disposed in fac... | 08/28/2007 |
| 7255329 | Gate valve with offset valve stem An improved gate valve has a main body defining a flow passage, and a cylindrical gate member, which has a continuous seal disposed within a groove in the gate surface. The gate is actuated by a valve stem movable through a bonnet connected to the main body, with th... | 08/14/2007 |
| 7231934 | Shut-off actuator with gas generation device A shut-off device, in particular for application in the extraction of natural gas and mineral oil, has a shut-off housing (3) comprising an admission channel (2) and in which a shut-off organ (4) is supported in an adjustable manner relative to ... | 06/19/2007 |
| 7225827 | Insertion valve and installation method A valve assembly for insertion in a pipe containing fluid under pressure includes a valve body adapted to be assembled over the pipe and a valve-stopping mechanism that mounts on the valve body. The hollow valve body interior and an access opening in the valve body ... | 06/05/2007 |
| 7147228 | Pressure relief device A circular seal (19) for the end face of a substantially cylindrical canister, the seal (19) having a substantially rectangular cross-section, and a recess (21) in one side thereof to reduce the area of said cross-section. In use the recessed ar... | 12/12/2006 |
| 7121523 | Fluid control valve Particularly in an engine that has been inactive for a substantial period of time at a cold temperature, fluid forces acting on moving members, such as electronically-activated fluid control valves, may be significant until the engine warms up. A way to reduce the f... | 10/17/2006 |
| 7100893 | Gate valve A gate valve having a polymeric monolithic liner, the liner having cylindrical flange portions projecting from either side to form a fluid passageway through the liner, first and second housing portions forming a liner cavity, the liner being disposed in the liner c... | 09/05/2006 |
| 7059747 | Shutter mechanism for floodlight, with drive The shutter drive mechanism and floodlight has an outer housing which surrounds the light fixture and also which protects the light fixture and a drive mechanism from the elements. Extending outward from the housing is a drive veil which supports the drive mechanism... | 06/13/2006 |
| 7059586 | Knife gate valve having elastomeric gate and chest seals A gate seal for a knife gate valve comprising a sealing surface lining the gate channel and an integral gasket for compression between valve body halves, a chest seal for a knife gate valve comprising a body having an expandable sealing surface and one or more injec... | 06/13/2006 |
| 7032882 | Valve assembly having novel flow characteristics A valve assembly including a housing having a flow channel and an annular surface surrounding the flow channel, a slide plate movable to a closed position, and a seal ring positioned between the annular surface and the slide plate. The seal ring includes a first and... | 04/25/2006 |
| 7017886 | Sliding gate valve A sliding gate valve, a sealing gasket for the valve, and a method of assembling the valve that may be used to govern the flow of a fluid such as a liquid or a gas. The sealing gasket may be characterized as having a circular portion, two connector portions, and a s... | 03/28/2006 |
| 7014164 | Device for protection against explosions in pipe-line A shut-off device (1) for protection against explosions in a pipe-line is fitted with a slide valve plate (10) movable transversely to the direction of flow (A). The slide valve plate is connected via a piston rod (25, 26) to a piston (27, 28... | 03/21/2006 |
| 7011294 | Vacuum valve A vacuum valve comprises a valve housing with a valve opening having a longitudinal axis and a valve seat, a valve plate which is displaceable in a straight line in a displacement direction between an open position in which it releases the valve opening and a closed... | 03/14/2006 |
| 7004452 | Valve seal assemblies and methods A method of sealing a valve engaging member to a valve body about a borehole and structure thereof. Two seal members disposed on either side of the valve engaging member include a seat member adjacent the valve engaging member and a pocket insert adjacent the seat m... | 02/28/2006 |
| 7000899 | Shutoff device A shutoff device for shutting off liquids or gases comprises a device housing (10) and a device (13) movable in said housing (10), the device (13) being provided with an opening (14). For sealing purposes, annular sealing bodies ( | 02/21/2006 |
| 6997041 | Dual slide gate valve and method for using same A method and device for pressure testing a pipe line is provided wherein a fitting is inserted into the pipeline by inserting male ends of the pipeline into female ends of the fitting to define a flow path through the fitting extending along a longitudinal axis. The... | 02/14/2006 |
| 6976666 | Electromagnetic valve assembly for controlling airbag An electromagnetic valve assembly for controlling airbags, includes a single valve assembly joined by main valve bodies of two electromagnetic valves each having respective electromagnetic control coils. A ventilation opening of the joined single valve assembly is p... | 12/20/2005 |
| 6966537 | Valve with seat assembly A valve is disclosed having a telescoping seat assembly that fits into a pocket or enlargement of a flow passageway through the valve body. An outer seat element seals with the pocket utilizing a plurality of seal assemblies to seal with the pocket whereby pressure ... | 11/22/2005 |
| 6957816 | Loop seal for knife gate valve A seal for use with a knife gate valve is disclosed, the seal having a loop to which is attached an axially facing sealing lobe. A sealing surface is positioned on the sealing lobe, the sealing surface having an axially projecting leading edge and flanking annular s... | 10/25/2005 |
| 6929244 | Interference-fit seal for gate valves A gate valve has seat rings pressed into counterbores to form seals. Each counterbore is located at an intersection of a flow passage with a central cavity of a body of the gate valve. The counterbore has a cylindrical constant diameter sidewall. The seat ring has a... | 08/16/2005 |
| 6923423 | Small bore gate valve A gate valve comprises a valve body, a stem bore which extends through the valve body, a stem which is disposed in the stem bore and which includes a first stem portion that is sealed to the stem bore, a second, smaller diameter stem portion that is sealed to the st... | 08/02/2005 |
| 6918574 | Reduced torque gate valve with roller screw A gate valve is disclosed which comprises a valve body which includes a flow bore that extends completely therethrough and a gate cavity that extends partially therethrough and intersects the flow bore, a bonnet which is connected to the valve body over the gate cav... | 07/19/2005 |
| 6837483 | Gate valve assembly A gate valve assembly includes a valve seat and a valve. The valve seat includes a passage opening and a contacting region surrounding the passage opening. The valve includes a groove located on a marginal region of the valve, and a sealing body positioned in the gr... | 01/04/2005 |
| 6817593 | Slide gate valve for powder and granular material A sealing member includes a gland packing pressed into a wide, flat, ring-shaped seal housing to seal a sliding portion of a gate plate. The seal housing has a bamboo shoot-like shape or a bevel-like shape structure in front and cross sectional view and includes wid... | 11/16/2004 |
| 6776184 | Insertion valve and installation method A valve assembly for insertion in a line formed by an existing pipe of predetermined outside diameter containing fluid under pressure includes a valve body with a bonnet-supporting flange that defines an access way into the valve body through which an installer can ... | 08/17/2004 |
| 6745999 | Gate valve for high-density slurries, and a valve body assembly, and a solids-containing wall lining means therefor Flexible, plastic, solids-containing liners or panels are disposed in the chamber of the valve body for contacting, interfacing engagement with the gate. Accordingly, the panels and gate substantially fully occupy the chamber, and prevent an entry of slurry solids t... | 06/08/2004 |
