Famous Patents
In 1608, Dutch eyeglass maker Hans Lipperhey filed the first patent for a working telescope. The patent was denied.
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 |
| 7823859 | Normally-closed valve having a microflow rate adjusting device A normally-closed valve having a microflow rate adjusting device includes a valve stem for opening and closing a fluid passage; a biasing device for biasing the valve stem in a direction to close the fluid passage; a piston body which is engaged in a cylinder in an ... | 11/02/2010 |
| 7571890 | Valve construction and method of use An actuated valve having a rotatable cam that controls an opening and closing disc and stop members for the cam, the cam having a notch that allows the cam to be stopped between fully open and fully closed, and an adjustable member on the stop member that correspond... | 08/11/2009 |
| 7357368 | Combined valve A combined valve is constructed by integrating a manual valve operating as a safety mechanism and a pilot valve. When a handle of a knob of the manual valve is in a safety mechanism release position, a valve mechanism can be opened and closed depending on whether or... | 04/15/2008 |
| 7337805 | Valve with adjustable stop An adjustable mechanism for a valve or actuator is provided. The adjustable mechanism cooperates with one or more pistons, which in turn cooperates with a valve element to limit the axial displacement of the valve element relative to the valve seat. The adjustable m... | 03/04/2008 |
| 7137405 | Low pressure check valve A check valve for preventing backflow of media including a valve movably coupled to a carrier body, the valve including a flexible membrane disposed therein such that the flexible membrane flexibly engages an aperture in the carrier body to prevent backflow of media... | 11/21/2006 |
| 7090190 | Flow control valve There is disclosed a flow control valve which regulates a flow rate by determining a stop position of a piston by contact in an opened state, and which enables remote and high-precision flow rate regulation. In a closed state, an urging force of a return spring acts... | 08/15/2006 |
| 6935610 | Partial stroke valve test apparatus A partial stroke valve testing apparatus is operably inserted between an emergency shutdown valve and a valve actuator, and comprises a drive cam attached to a drive shaft interconnecting the valve and actuator and an engagement cam attached to an engagement shaft w... | 08/30/2005 |
| 6932318 | Flow control device A flow control device comprises an inlet port through which fluid is supplied, an outlet port through which the fluid is delivered, a valve body which is arranged in a passage between the inlet port and the outlet port so as to open and close the passage, the flow c... | 08/23/2005 |
| 6814338 | Two-port vacuum valve capable of adjusting valve-opening A first piston and a second piston are accommodated in a piston chamber of a cylinder. The first piston is connected to a main valve member which opens and closes a main flow passage. The second piston is connected to a second rod having a stopper whose position can... | 11/09/2004 |
| 6607175 | Media control valve The present invention is related to valves for the controlling the flow of media. For example, the valves of the present invention may control the flow of solid media into a fluid stream. More, specifically, the valves of the present invention may be used... | 08/19/2003 |
| 6585004 | Multi-stage flow control Disclosed is system for controlling a dynamic hydraulic component, such as a hydraulic actuator or motor. The system allows for either zero, restricted or full fluid flow to the hydraulic component. This enables either no movement, slow, precise movements... | 07/01/2003 |
| 6585051 | Hydraulically operated fluid metering apparatus for use in a subterranean well, and associated methods A hydraulically operated fluid metering apparatus provides discharge of a known volume of fluid to an actuator of a well tool. In one described embodiment, the fluid metering apparatus is connected to a hydraulic input of a well tool actuator. Discharge o... | 07/01/2003 |
| 6425145 | Push button for metered flow By depressing a push button (13), a user deforms a flexible diaphragm (30) and thereby causes an incompressible fluid to flow from a first actuation-chamber segment (42) through openings (48) in a divider wall (46) and into a second chamber segment (44). ... | 07/30/2002 |
| 6341715 | Valve for the flow control of a fluid comprising solid particles Apparatus for operating a closure for an aperture of a material storage container has a device to regulate the position of the closure relative to the aperture, so that an annular gap through which material is discharged is adjustable to prevent crushing ... | 01/29/2002 |
| 6274885 | Active matrix display device with TFTs of different refractive index In producing a semiconductor device by annealing with laser light irradiation, while a linear laser light is scanned in a direction perpendicular to a line, the annealing is performed for a semiconductor material. In this state, since an anneal effect in ... | 08/14/2001 |
| 6079437 | Diaphragm valve with flow control stem air bleed A diaphragm valve includes a valve housing, a diaphragm assembly mounted within the valve housing, a pilot valve coupled to the valve housing and a flow control stem mounted in an upper bonnet of the valve housing. The valve housing has an inlet passage a... | 06/27/2000 |
| 6000675 | Tension-spring return rotary valve actuator A rotary valve actuator with movable actuator linkage maintained in a constant "pull-pull" tension, includes a sliding canister, rotatable lever, and a return spring substantially aligned in-line with each other. The linear motion of the canister in respo... | 12/14/1999 |
| 5848608 | Vacuum-pressure-control slow exhaust valve To reduce the axial length of a slow exhaust valve and thus the size of the valve, a secondary valve seat and a secondary valve body constituting a secondary valve mechanism for restrictively opening a channel connecting a chamber port and a pump port dur... | 12/15/1998 |
| 5755424 | High-pressure valve A high-pressure valve comprising a piston whose upper surface is acted upon intermittently by a medium, such as air, to control vertical movement of the piston, the valve including a connection of the piston to a needle valve. The needle valve coacts with... | 05/26/1998 |
| 5636652 | Valve for a hydraulic elevator A transition valve for a hydraulic elevator includes a block, a spool, an actuator, and an end cap. The actuator may be either a solenoid type actuator or an electric motor type actuator. The end cap includes an opening permitting engagement between the a... | 06/10/1997 |
| 5626516 | Pressure actuated door The invention is a flow control for a ventilation duct. It includes a movable panel which is attached to a variable volume reservoir. The application of vacuum to the reservoir controls the angular position of the door and the volume of the reservoir.... | 05/06/1997 |
| 5623968 | Valve assembly with manually actuated valve override A valve assembly for a pneumatic machine including a valve body having a first end, a second end, a central bore extending through the ends and a plurality of flow ports formed in the body; a valve spool movable through the bore along an axis in response ... | 04/29/1997 |
| 5390895 | Slow vent valve A slow vent valve for semiconductor wafer manufacturing equipment is disclosed, which generates a gentle flow of nitrogen gas to the vacuum chamber enough to maintain an undisturbed ambient environment for the wafer being processed in the chamber, protect... | 02/21/1995 |
| 5325888 | Pipeline valve transmission apparatus An apparatus is provided which includes a valve transmission designed to connect a valve actuator to a rotational valve. The valve transmission includes a pinion, a pair of stepped racks, and a lower gear, all within a housing. The pinion is designed to b... | 07/05/1994 |
| 5190263 | Locking mechanism for an actuator A locking mechanism for an actuator prevents the unauthorized operation of the actuator and also permits a viewer to determine whether the actuator is in a locked open, locked closed or unlocked position. The invention utilizes a clear cover guard which i... | 03/02/1993 |
| 5097747 | Pilot adjuster-connector for adjusting the speed of pneumatic pressure cylinders The invention discloses a controlled connector-adjuster permitting two different speeds in the same stroke of a double-acting pneumatic pressure cylinder. In the absence of a control signal at the orifice (13) of the apparatus, the escape pressure from th... | 03/24/1992 |
| 5094426 | Metering valve assembly Metering valve assembly having a poppet movable relative to a valve seat for controlling communication through an orifice. The poppet is urged toward the valve seat with a closing force, and the poppet can be adjusted gradually to provide a fine adjustmen... | 03/10/1992 |
| 4852773 | Adjustable flow applicator for a positive displacement constant flow-rate dispenser An adjustable flow applicator includes a body having an axial flow pasasge and an inlet passage adapted for connection to a source of pressurized fluidic material dispensed by a positive displacement constant flow rate dispenser. A nozzle is connected to ... | 08/01/1989 |
| 4801051 | Flow control device for a fluid dispensing apparatus An improved liquid dispensing apparatus having a micro-adjustment of the opening travel of a needle valve of the apparatus. This micro-adjustment comprises a sleeve-stop member which is axially movable but non-rotatable in the body of the apparatus. One e... | 01/31/1989 |
| 4794847 | Rotary actuator A rotary actuator for a damper shaft controls the angular position of the damper shaft in accordance with variations in fluid pressure inside of the actuator. The actuator includes a housing, a flexible diaphragm within the housing separating it into a fl... | 01/03/1989 |
| 4747576 | Flow control valve A flow control valve in which the main body of the valve and the first and the second cylinder is disposed coaxially with each other. The valve body disposed in the main body forms a first and a second separate chamber in the main body. A first and a seco... | 05/31/1988 |
| 4708316 | Variable rate EGR valve with step motor control and method therefor A variable flow rate valve (10) comprising; a housing (12) defining a vacuum chamber (35) and a flexible diaphragm (50) secured to said housing (12). The diaphragm defines one extreme of the pressure chamber (35) and is movable in one direction in respons... | 11/24/1987 |
| 4699353 | Rotary valve actuator A valve actuator for providing rotational drive to a valve through a valve stem, where the valve includes a flange with attachment bolt holes for attachment of the actuator thereto using bolts. The actuator has an outer body having a sidewall and a base e... | 10/13/1987 |
| 4671485 | Solenoid-operated pilot valve with adjustable flow control A solenoid-operated pilot valve of the diaphragm type which includes an assembly for controlling the flow of liquid through the valve. The valve has particular although not exclusive utility for irrigation purposes. The valve includes a diaphragm chamber ... | 06/09/1987 |
| 4629156 | Pressure relief and shut-off valve A combination valve for relieving excess pressure while also stopping downstream gas flow. A pull-type valve core is mounted within the gas flow passage of a valve body. It includes an actuating plunger operatively connected to a poppet that overlies the ... | 12/16/1986 |
| 4421292 | Air-operated oil pressure control valve An air operated oil pressure control valve wherein the inlet port and the outlet port for oil are provided in the valve body at a position wherein they face each other with a normally closed valve port located in between. When compressed air is introduced... | 12/20/1983 |
| 4408627 | Exhaust brake valve unit The invention provides an automatic exhaust brake valve unit having a hollow body with an exhaust gas passage extending therethrough and a valve closure member movable in the hollow body between a closed position in which it closes the passage, and an ope... | 10/11/1983 |
| 4325535 | Actuator mechanism for a rotary valve or the like An actuator for a rotary valve preferably embodying a diaphragm motor operated by pressure fluid. A driving sleeve is reciprocated linearly by the diaphragm motor and within said sleeve is a rotatable shaft, which is axially aligned with the diaphragm mot... | 04/20/1982 |
| 4287812 | Control valve A control valve is provided between a direction-changeover valve and an actuator in a fluid-pressure operating system. This control valve includes a body having an inlet and an outlet; a fluid passage interconnecting the inlet and the outlet; a valve body... | 09/08/1981 |
| 4284261 | Stroke adjustment for vacuum motor A vacuum motor for controlling a carburetor choke valve in which the stroke of the motor is limited to a predetermined length for a predetermined period of time after which the length of stroke is increased a predetermined amount.... | 08/18/1981 |
