Did You Know...
...that Thomas Edison's patent application on his phonograph was approved by the Patent Office in just seven weeks? In contrast, it took Gordon Gould, the inventor of the laser, 30 years to obtain his patent -- finally awarded in 1988!
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 |
| 8156960 | Servo pressure control valve A valve for controlling pressure in a system is provided. The valve includes a housing, a servo spool and a piston positioned within the housing with the piston and the servo spool being movable relative to each other. The piston defines a first orifice configured t... | 04/17/2012 |
| 8136545 | Apparatus to regulate fluid flow Apparatus to regulate fluid flow are disclosed. The apparatus includes an example regulator valve and an example automatically-adjusting or self-adjusting amplifier valve to maintain fluid flow during low downstream demand fluid flow conditions, and to maintain the ... | 03/20/2012 |
| 7302961 | Surge relief valve A surge relief valve comprising a main valve body having a dome port and an inlet port. The inlet port is in fluid communication with a first fluid. The invention further includes a dome reservoir connected to the main valve body via the dome port and arranged to ho... | 12/04/2007 |
| 7287541 | Method, apparatus and system for controlling fluid flow A system, apparatus and method of controlling the flow of a fluid are provided. In accordance with one embodiment of the present invention, a flow control device includes a valve having a flow path defined therethrough and a valve seat in communication with the flow... | 10/30/2007 |
| 7175155 | Control valve apparatus and pressure circuit The control valve apparatus holds a seat valve member in a position seated on a valve seat to thereby prevent a backward flow even if the pressure in the inlet chamber side becomes lower than the pressure in the outlet chamber side. With a pilot control valve member... | 02/13/2007 |
| 7150299 | Assembly and method for containing, receiving and storing fluids and for dispensing gas from a fluid control and gas delivery assembly having an integrated fluid flow restrictor A fluid control and gas delivery assembly and method for containing, receiving and storing hazardous fluids and for dispensing gas comprising a container, a fluid fill path, a gas dispensing path, a first shut-off valve, a pressure reducer, a fluid flow restrictor, ... | 12/19/2006 |
| 7147188 | Aircraft store ejector rack systems and methods Store ejector rack systems and methods having an improved fluid actuator assembly for sequencing the opening of the hooks from which the store is suspended and the pressurization of thrusters which force the store away from the aircraft are disclosed. In one embodim... | 12/12/2006 |
| 7025083 | Quick closing shut-off valve A quick closing shut-off valve includes an inlet, an outlet and a passage there between. A closing element blocks the passage when in the closed position. The closing element is interconnected to a piston via a pull rod. The piston is positioned within a working cha... | 04/11/2006 |
| 7013916 | Sub-atmospheric gas delivery method and apparatus An apparatus for containing and delivering hazardous gases at sub-atmospheric pressure from a pressurized container is provided which includes a valve body in sealed communication with an outlet orifice of the pressurized container. The outlet orifice of the pressur... | 03/21/2006 |
| 6945272 | Passively actuated valve A passively actuated valve for isolating a high pressure zone from a low pressure zone and discontinuing the isolation when the pressure in the high pressure zone drops below a preset threshold. If the pressure in the high pressure zone drops below the preset thresh... | 09/20/2005 |
| 6935363 | Pressure control system for low pressure operation A pressure control system for controlling the pressure of a process fluid stream at a certain location having a pressure regulator disposed in the process fluid stream, through which the process fluid stream flows. A first pilot controller senses the pressure of the... | 08/30/2005 |
| 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 |
| 6823785 | Printing unit A printing unit has at least four cylinders that form a printer. At least two of these four cylinders rotate independently of each other. At least one of the cylinders in the group of at least four cylinders has a set up rotational speed that is not zero and that is... | 11/30/2004 |
| 6796323 | Dual seat valve A dual seat valve which selectively supplies and releases fluid to and from a reservoir, such as a dome of a main valve in a pressure relief system. The valve comprises a housing with an interior chamber and an annular first seat surface. A valve assembly is configu... | 09/28/2004 |
| 6752168 | System for controlling the working conditions for mechanical pumps, and a regulation valve for such a system A system for controlling the working conditions for mechanical pumps supplying associated devices with pressure fluid via a pipe system. A valve means (25) is placed between at least one of the pumps and an appurtenant device supplied by the pump, which valve... | 06/22/2004 |
| 6418956 | Pressure controller A pressure controller is provided for a pressure regulator. The pressure controller controls a pressure regulator to deliver process fluid at a regulated pressure from a variable supply. The pressure controller includes a control pressure source independe... | 07/16/2002 |
| 6386228 | Pilot device for a safety valve A control device includes a pressure-displacement transducer for triggering a control part for activating a safety valve of a pressure vessel. A space in the pressure-displacement transducer can be connected to a blow-off tank through a drainage line. A f... | 05/14/2002 |
| 6386227 | Non-flowing pilot valve A non-flowing pilot valve is disclosed having a sense piston assembly (16) and a feedback sleeve (40) co-axially mounted within a valve body (12). A dome-line chamber (32) and an exhaust-line chamber (34) are isolated from each other by a feedback sleeve ... | 05/14/2002 |
| 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 |
| 6318406 | Pilot operated relief valve A pilot operated safety relief valve (14) having a main piston valve member (26). A dome chamber (42) is provided in the valve body (18) over piston valve member (26) and a cap (44) forms a closure for dome chamber (42). A pilot valve (46) is mounted on t... | 11/20/2001 |
| 6263905 | Automatic regulating valve apparatus An automatic regulating valve apparatus comprises a main valve unit, and a pilot valve unit operatively connected to the main valve unit to control the main valve unit. The main valve unit comprises a main valve casing, a main valve element disposed in th... | 07/24/2001 |
| 6209577 | Modulating action non-flowing pilot operated relief valve A pilot valve includes a body having a channel formed therein, an inlet chamber formed along the channel, an inlet port in communication with the inlet chamber, a control port in communication with the channel, and a vent port in communication with the ch... | 04/03/2001 |
| 6173735 | Method and apparatus for regulating gas flow A pilot-operated, pressure-loaded, movable diaphragm-type gas-flow regulator valve is shown which is used in flow control applications. A regulator body internal port arrangement interconnects two independent throttling mechanisms in series. Two throttle ... | 01/16/2001 |
| 6161571 | Modulating relief valve A modulating relief valve comprising a main relief valve and a dome pressure control system. The main relief valve has an inlet subject to system pressure, an outlet, a valve member normally sealing the inlet, a piston that rises and falls wit the valve m... | 12/19/2000 |
| 6135142 | Control valve device An automatic-control valve device has a main valve unit, and a pilot valve unit for controlling the main valve unit. The pilot valve unit has a pilot valve A which closes when pressure in a downstream passage on the downstream side of the main valve unit ... | 10/24/2000 |
| 6082390 | Gas blanket controller A gas blanket controller, comprising a housing defining a chamber sealed with a diaphragm on a first side of the chamber, and a fitting for a tank outlet on another side of the chamber; a rod secured to the diaphragm for movement with the diaphragm; a rod... | 07/04/2000 |
| 6019121 | Pressure reducing valve A pressure reducing valve 30 comprises a body unit 32, a bonnet unit 36, and an operating unit 38 having a handle 126. The pressure reducing valve 30 further comprises a first diaphragm 84, a second diaphragm 86, a third diaphragm 100, and a fourth diaphr... | 02/01/2000 |
| 5996606 | Four-port valve and three-way valve A four-port changeover valve in an emergency water storage tank facility for changing over the flow paths of the water main and to the tank by axially moving the valve rod. Three valve seats are formed axially in a valve box. The valve rod extends through... | 12/07/1999 |
| 5992449 | Pilot operated safety relief valve adapted for low fluid pressures A safety relief valve (10) has a diaphragm actuator (24) including a diaphragm (26) with a dome chamber (34) on one side of the diaphragm (26) and an underdome chamber (36) on an opposed side of the diaphragm (26). A diaphragm operated pilot control valve... | 11/30/1999 |
| 5909747 | Radial flow diaphragm valve A valve arranged for radial fluid flow from its inlet to its outlet has a spring-loaded diaphragm covering a valve cage member having a central opening communicating with the valve inlet surrounded by a plurality of peripheral openings communicating with ... | 06/08/1999 |
| 5890508 | Main relief valve for safety relief system A pilot operated safety relief valve (14) has a main piston valve member (60) mounted for reciprocal movement between open and closed positions. The lower end of piston valve member (60) has a seat retainer (87) to retain an annular seat (89) therein. An ... | 04/06/1999 |
| 5842501 | Pilot operated safety relief valve A pilot operated safety relief valve assembly including a main safety relief valve (14) and a pilot valve (36) connected directly to the relief valve (14) is disclosed. Main safety relief valve (14) has a planar mounting face (76) in contact relation with... | 12/01/1998 |
| 5762102 | Pneumatically controlled no-bleed valve and variable pressure regulator A pneumatically controlled assembly for the no-bleed regulation of the pressure of a gas as it flows in a pressurized line and including two balance valves that are set to respond to variations in pressure in conjunction with a controller valve so as to e... | 06/09/1998 |
| 5758686 | Control valve abnormality detection method and apparatus In a control valve abnormality detection method of detecting abnormality in a control valve, a characteristic expression representing the relationship between three factors in the normal state of the control valve is pre-set. The three factors consist of ... | 06/02/1998 |
| 5590684 | Dual pilot manifold assembly for a safety relief valve A manifold assembly 10 for operating a safety relief valve 12 includes a manifold block 60 having a block inlet port 230, a block dome pressure port 232, and a pair of control cavities 220 and 222 each adapted for receiving a pilot valve 70 or auxiliary c... | 01/07/1997 |
| 5520206 | Exhaust reduction system for control valves An exhaust reduction system for reducing gas emissions in pipeline controlling devices which operate control valves, which system adjusts and reduces the pressure of a control stream of gas from a conventional line pressure regulator to the control valves... | 05/28/1996 |
| 5398719 | Pressure protection installation for a pressure vessel A combination pressure vessel and pressure protection installation for the pressure vessel includes a connector pipe connected to the pressure vessel. A valve assembly has a housing block disposed directly on the connector pipe and has at least one safety... | 03/21/1995 |
| 5323799 | Fully mechanical pressure relief system A mechanical pressure relief system for a pressurized operating system which is suitable for high purity applications. The pressure relief system utilizes a mechanical logic switch, operable at a set point pressure, in conjunction with a pressurized actua... | 06/28/1994 |
| 5275202 | Adjustable emergency relief vent with surge protection A vent for relieving pressure from within a storage tank at a predetermined tank pressure through an opening in the tank including a mounting member for connecting the vent in sealed engagement with the opening and for providing a valve opening and associ... | 01/04/1994 |
| 5174321 | Method and apparatus for determining set pressure of pilot operated pressure relief valve A testing system for a pilot operated, pressure relief valve of the type wherein movement of the pilot in response to a predetermined line pressure effects the opening of the pressure relief valve comprising a portable apparatus including a source of test... | 12/29/1992 |
