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| Number | Title | Issue Date |
| 7635004 | Non-pyrotechnic isolation valve element A housing has a passageway containing a valve seat. A valve element seals against the valve seat to maintain the valve in the closed position. A release rod extends from the valve body and a shell surrounds the release rod, preventing its movement. The shell is form... | 12/22/2009 |
| 7438087 | Overpressure rotary valve assembly with locking pin and collapsible member An overpressure rotary valve assembly for detecting and abating an overpressure condition. A valve member is configured for movement between a closed position and an open position. A locking pin contactingly retains the valve member in a selected one of the open and... | 10/21/2008 |
| 7370671 | Valve activation assembly which mechanically collapses a collapsible member in response to both overpressure and underpressure conditions A valve activation assembly which mechanically collapses a collapsible member, such as a buckling pin, in response to both overpressure and underpressure conditions of a pressurized fluid. A retention member retains the valve member in a selected position with respe... | 05/13/2008 |
| 7335002 | Fluid end A fluid end for a high-pressure pump including a unitary body with a plurality of horizontal passages each for receiving a reciprocating plunger at one of its ends and a pressure relief valve at the other of its ends. The body is provided with a corresponding number... | 02/26/2008 |
| 7311117 | Reset relief valve A reset relief valve with a body having an inlet port, an outlet port, and an interior wall partially defining an enclosed chamber, a piston disposed in the body and moveable between a first position at which the piston is disposed in fluid flow-blocking relationshi... | 12/25/2007 |
| 7198099 | Method and system for injecting a treatment fluid into a well A system for injecting a treatment fluid into a well, the system includes: a surface controlled subsurface safety valve; a valve control conduit which extends from the surface controlled subsurface safety valve to a wellhead of the well, wherein the surface controll... | 04/03/2007 |
| 7124770 | Shear mechanism for backpressure relief in a choke valve The present invention relates to a mechanism for preventing damage to the actuator of a hydraulic choke valve in the event of excessive backpressure on the outlet of the choke. The backpressure relief device is applicable to a choke valve which meters flow from a hi... | 10/24/2006 |
| 6880568 | Pressure relief system with multi-port valve A pressure relief system is provided to detect and abate an overpressure condition in a pressurized fluid disposed in a conduit. The system includes a valve assembly and an actuator configured to actuate the valve assembly to establish an overpressure path for the p... | 04/19/2005 |
| 6843265 | Pressure relief system with supply activated valve A pressure relief system for detecting and abating an overpressure in a pressurized fluid. The system includes a pressure response assembly that has a pressure responsive member, such as a buckling pin, configured to buckle when a predetermined force is applied to t... | 01/18/2005 |
| 6796321 | Pressure relief valve A pressure relief valve including a valve seat and a valve seat retainer abutting the valve seat. The valve seat has a central channel whereas the valve seat retainer has a number of peripheral channels. A deformable plug is positioned between the valve seat and the... | 09/28/2004 |
| 6666230 | Pressure relief system with trigger activated valve A pressure relief system is provided to detect and abate an overpressure condition in a pressurized fluid. An actuator assembly establishes an overpressure path for the pressurized fluid when a pressure of the pressurized fluid reaches a predetermined lev... | 12/23/2003 |
| 6659119 | Fluid pressure responsive dual piston or emergency shutdown valve actuator This valve actuator is formed by a pair of pistons in a sleeve valve body fluid pressure or vacuum moved away from each other for angularly rotating a shaft, transversely journaled by the body, in a predetermined direction and opening or closing a fluid c... | 12/09/2003 |
| 6651687 | Pressure relief system with clutch activated valve A pressure relief system for detecting and correcting an overpressure situation in a pressurized fluid. The system includes a pressure responsive member such as a buckling pin configured to mechanically collapse when a predetermined force is applied to th... | 11/25/2003 |
| 6651686 | Valve actuator system An actuator system for a system valve exposable to a source of system pressure. A piston within a sensing vessel is caused to move longitudinally from a first position to a second position in response to a designated system pressure. A first piston stem c... | 11/25/2003 |
| 6637448 | Contamination-free pyrovalve A contamination-free pyrovalve having first tubing section and a second tubing section. The first and second tubing sections are disposed in spaced-apart relation such that a conveying path between the first and second tubing section is established. An op... | 10/28/2003 |
| 6491055 | Pressure relief apparatus A pressure relief apparatus includes a valve having a body. A shaft is rotatably disposed in the body and has an exterior end extending through the body. A plug, which may contain an internal passageway, is mounted on the shaft and is disposed in the flui... | 12/10/2002 |
| 6488044 | Pressure relief apparatus A pressure relief apparatus includes a valve having a body. A shaft is rotatably disposed in the body and has an exterior end extending through the body. A plug, which may contain an internal passageway, is mounted on the shaft and is disposed in the flui... | 12/03/2002 |
| 6484742 | Cartridge assembly for valve A cartridge assembly for a valve is disclosed. The cartridge assembly includes a cartridge containing an activation component. The cartridge and activation component are configured to be replaceable as a unit. The activation component prevents the valve f... | 11/26/2002 |
| 6425410 | High impact type gate pressure release valve An inline high pressure fluid release valve is formed by a valve body having a transverse opening forming a fluid passageway interposed in a fluid conductor. A vertically moveable plunger in the valve body includes a disc normally closing the fluid passag... | 07/30/2002 |
| 6412512 | Pressure control valve The invention relates to a pressure control valve 1 for a tank intended to contain a fluid and comprising at least one flap 5 obturating an aperture linking the inside (I) and the outside (E) of the tank, such flap being held in the obturating position by... | 07/02/2002 |
| 6367498 | Pressure relief apparatus A pressure relief apparatus includes a valve having a body. A shaft is rotatably disposed in the body and has an exterior end extending through the body. A plug, which may contain an internal passageway, is mounted on the shaft and is disposed in the flui... | 04/09/2002 |
| 6367203 | Rupture panel A rupture panel for relieving an excess pressure differential between the interior and exterior of a vessel having a wall and an opening through the wall includes a first frame section connected to the vessel wall at the opening and a pair of pressure rel... | 04/09/2002 |
| 6341616 | Fire protection fluid relief valve A fluid pressure and heat sensitive valve connected with a flow line includes a collapsible pin, normally maintaining the valve closed, which collapses to open the valve in response to fluid pressure above a predetermined limit and includes a fusible plug... | 01/29/2002 |
| 6325088 | Buckling pin actuated, pilot operated pressure relief valve The present invention provides a method, apparatus and system for using sacrificial buckling pin technology for a reliable actuated safety relief valve and for a pilot valve system. The buckling pin fails at a predicted, predetermined system pressure thro... | 12/04/2001 |
| 6276389 | Toxic fluid safe relief valve A toxic material pressure relief valve is formed by a valve body having a lateral bore and an inline bore forming a fluid passageway intersected by a valve seat in axial alignment with the lateral bore. A bonnet closes the lateral bore and slidably suppor... | 08/21/2001 |
| 6227226 | Fire activated, fail safe, gate valve bonnet A well control system having well controlled fluids distributed through pipes includes valves that are opened by a heat softened valve obstruction element. The translation of a fluid flow obstructing gate in a gate valve is driven by a stem element attach... | 05/08/2001 |
| 6186159 | Rupture disk controlled hydraulically actuated valve assembly A pressure responsive valve assembly is disclosed as having a frangible burst disk that largely controls actuation of the valve. The valve assembly includes a housing having an inlet and an outlet and a valve seat therein. An actuating unit includes a col... | 02/13/2001 |
| 6155284 | Buckling pin latch actuated safety relief valve The invention provides a method for using sacrificial buckling pin technology for a reliable actuated safety relief valve. The buckling pin fails at a predicted system pressure through transfer of force exerted by the system pressure on a sensing piston o... | 12/05/2000 |
| 6131599 | Rupture disk controlled mechanically actuated pressure relief valve assembly Improved burst disk-type pressure responsive valve assemblies (20, 184) of the pressure relief and shutdown variety are provided which utilize frangible burst disks (30, 204) which largely determine the set point pressures for the valves. The assemblies (... | 10/17/2000 |
| 6058961 | High pressure relief valve A right angle relief valve body for high pressure fluid is provided with a bushing type valve seat in the inlet port. A piston valve having rod guide end portions is longitudinally slideable in the valve body toward and away from the inlet port. A sleeve ... | 05/09/2000 |
| 6053194 | Duckbilled check valves and methods of making and using same Disclosed herein are closures that are formed via an injection molding process with a thin breakable web. When they are first placed in a fluid conduit and exposed to line pressure the web will break open so as to thereby create a duckbilled type check va... | 04/25/2000 |
| 5984269 | Rotatable valve assembly Rotatable valve assembly includes a mounting mechanism for rotatably mounting the valve in a housing, the mounting mechanism including a shaft having an outside end extending through the housing. A conversion mechanism converts fluid pressure in the housi... | 11/16/1999 |
| 5836337 | Large diameter low pressure relief valve A large diameter low pressure collapsible pin relief valve adapted to be connected with a vessel containing fluid under low working pressure is formed by a normally closed valve initially released to open by excess fluid pressure in the vessel applied thr... | 11/17/1998 |
| 5727586 | Reclosing collapsible pin pressure relief valve A fluid pressure relief valve of the excess pressure collapsible pin relief valve type which monitors fluid pressure in a system and automatically recloses after opening and discharging an initial volume of high pressure fluid. The relief valve includes a... | 03/17/1998 |
| 5577523 | Method of making relief valve interchangeable buckling pins for a selectable pressure setting A method of making relief valve interchangeable buckling pins for selecting the pressure release setting of a relief valve. Comprises selecting a slender column having a uniform diameter of predetermined dimension cutting the column to a predetermined len... | 11/26/1996 |
| 5577524 | Large diameter resettable rupture pin relief valve A large diameter in-the-field resettable rupture pin relief valve is formed by superposed valves normally closing a valve inlet port and released to open the port under excess pressure by collapsing the pin. Pressure operated cylinders connected with the ... | 11/26/1996 |
| 5575306 | Relief valve trigger for relatively large diameter fluid pressure containers A pressure relief valve trigger is formed by a diaphragm chamber communicating with fluid in a container being monitored by a pressure collapisible pin axially maintaining the diaphragm in the chamber in a given position. A flapper valve latch member rele... | 11/19/1996 |
| 5348039 | Large diameter and relatively high pressure relief valve A pressure relief valve for monitoring pressure in relatively large diameter conductors containing relatively high fluid pressure. The valve having housing openings of equal diameter with respect to the conductor and a flow passageway provided with differ... | 09/20/1994 |
| 5318126 | Explosively opened production valve including a frangible breakup element operated by tubing pressure or rathole pressure or both A production valve includes an outer housing having a production port, a piston disposed within the outer housing and adapted to move from one position to another position, a frangible breakup element supporting the piston in the one position, and a deton... | 06/07/1994 |
| 5297575 | In-line high pressure fluid release valve An in-line high pressure fluid release valve is formed by a valve body having a cylinder and having a transverse opening forming a fluid passageway interposed in a fluid conductor. A piston normally closing the fluid passageway and having a fluid passagew... | 03/29/1994 |
