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...During the Civil War, the Confederacy established its own Patent Office which issued 266 patents, a third of which concerned implements of war.
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| Number | Title | Issue Date |
| 7905254 | Shut-off valve A cutoff valve having an upstream valve part and a downstream valve part which are assembled in series in a flow passage. Each of the valve elements at the valve parts are formed separably stacking a large diameter first valve element and a small diameter second val... | 03/15/2011 |
| 7234527 | System and method for fail-safe disconnect from a subsea well A system and method for controllably separating a conduit into an upper portion and a lower portion. The system includes a first valve in the upper portion of the conduit above a point of separation, and a second valve in the lower portion of the conduit below the p... | 06/26/2007 |
| 7185853 | Air discharge valve for an aircraft An air discharge valve for an aircraft has an inner valve flap (1) and an outer valve flap (3) which partially overlap each other to form a nozzle of the Laval type with a nozzle inlet (6) converging toward a nozzle neck (S) and with a nozzle ou... | 03/06/2007 |
| 7181306 | Enhanced plasma etch process A method of operating a plasma etcher wherein gas is introduced into the etcher at a substantially higher rate than a previous standard rate for a desired etch selectivity, and the throttle valve's open value is set to a substantially greater open value than a previ... | 02/20/2007 |
| 7128080 | Surge prevention device A surge prevention valve may be used to prevent the formation of an initial surge of high pressure. The valve may be located, for example, between a high pressure gas cylinder and a medical pressure regulator. The valve is provided with first and second valves locat... | 10/31/2006 |
| 6910504 | Surge prevention device A surge prevention valve may be used to prevent the formation of an initial surge of high pressure. The valve may be located, for example, between a high pressure gas cylinder and a medical pressure regulator. The valve is provided with first and second valves locat... | 06/28/2005 |
| 6901962 | Surge prevention device A surge prevention valve may be used to prevent the formation of an initial surge of high pressure. The valve may be located, for example, between a high pressure gas cylinder and a medical pressure regulator. The valve is provided with first and second valves locat... | 06/07/2005 |
| 6843264 | Multi-phase pressure control valve for process chamber A new and improved, multi-phase pressure control valve for facilitating quick and accurate attainment and stabilization of gas pressure inside a semiconductor fabrication process chamber such as an etch chamber or CVD chamber. In one embodiment, the multi-phase pres... | 01/18/2005 |
| 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 |
| 6745794 | Flow control valve A valve assembly in which a primary valve is provided within a primary passageway of a valve housing to control flow rates of a fluid flow within the primary passageway. The primary valve is moved between open and closed positions relative to a valve seat defined in... | 06/08/2004 |
| 6663194 | Solenoid valve for brake systems A solenoid valve for brake systems, including a spool movably set in a valve housing, provided along its central axis with the first orifice which has a predetermined diameter, and provided at a position around the plunger with a plunger guide having a pr... | 12/16/2003 |
| 6634382 | Hydraulic control device A hydraulic control device for an apparatus for injecting fuel into a combustion chamber of an internal combustion engine has an externally controllable actuation device and a valve part, which cooperates with this actuation device. In order to determine ... | 10/21/2003 |
| 6622743 | Surge prevention device A surge prevention valve may be used to prevent the formation of an initial surge of high pressure. The valve may be located, for example, between a high pressure oxygen cylinder and a medical pressure regulator. The valve also may be used for other purpo... | 09/23/2003 |
| 6581635 | Pilot-type two-port vacuum valve A main valve mechanism for opening and closing a main flow path between a first port and a second port has a main valve body, a large-diameter first piston for opening the main valve body, a main pressure operating chamber for driving the first piston, an... | 06/24/2003 |
| 6581621 | Valve and fuel tank provided with a valve for a motor vehicle The invention relates to a valve and a fuel tank provided with a valve for a motor vehicle. Bleeder valves for integrated compensation volumes for fuel tanks are known in the prior art. One disadvantage of known valves is that if the tank is filled slowly... | 06/24/2003 |
| 6513541 | Vent valve A pipeline vent valve comprising a body (13) defining a chamber (A) having an inlet (17) towards its lower end which is adapted to be connected to a pipeline and an outlet (21) towards its upper end, the outlet defined by a valve seat, a first valve membe... | 02/04/2003 |
| 6289932 | Dual port soft start valve A valve 10 is provided which has two pathways which each extend between an inlet bore 4 and an outlet bore 6 of the valve 10. A soft start passage 55 initially opens to equalize pressure between the inlet bore 4 and the outlet bore 6. A main poppet or oth... | 09/18/2001 |
| 6283154 | Control valve for use in a reservoir injection system for a diesel engine A control valve contains a housing with an inlet connection, an outlet connection and a return connection. A first seat valve with a first valve body and a second seat valve with a second valve body are disposed in the housing. The first seat valve is dis... | 09/04/2001 |
| 6273136 | Differential valve, specifically a cabin air discharge valve in an aircraft, and method for regulating cabin pressure Disclosed is a differential valve specifically a cabin air discharge valve for use in the cabin pressure regulating system of an airplane. The valve has two valve stages for closing a valve port including a smaller first stage and a larger second stage. T... | 08/14/2001 |
| 6250383 | Lubricator for underbalanced drilling A system usable with a subterranean well includes a tubing and a lubricator. The tubing is adapted to receive a drill string in a passageway of the tubing, and the lubricator is located downhole and is connected to the tubing. The lubricator is adapted to... | 06/26/2001 |
| 6073654 | Hydraulically trippable check valve for underground mine support hydraulics The body (1) of the hydraulically trippable check valve for mine support hydraulics according to the invention contains: a valve poppet (13) biased in the closing direction by a spring (22); a control piston (17) which can be acted on by a hydraulic contr... | 06/13/2000 |
| 6032692 | Electromagnetic valve, in particular for hydraulic motor vehicle braking systems with wheel slip regulation The present invention relates to an electromagnetic valve including a valve housing (2) in which a sleeve (13) housing a magnetic core (14) is inserted, including a magnetic armature (16) on which a valve closure member (7)is mounted which, in its electro... | 03/07/2000 |
| 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 |
| 5810330 | Magnetic valve for a traction-controlled hydraulic brake system for motor vehicles A magnetic valve that switches at high differential pressures and furnishes a large flow cross section. The magnetic valve has an armature, which when current is supplied to a coil is movable toward a pole core counter to the force of a restoring spring. ... | 09/22/1998 |
| 5657962 | Solenoid valve closure part and recycling circuit for the petrol vapours of internal combustion engines A solenoid valve closure part comprising a seat and a solenoid coil, the valve closure part including the free end of a movable core within the hub of the coil, and further including an intermediate component capable of bearing against the seat and itself... | 08/19/1997 |
| 5651383 | Quick-coupling component with pressure reduction member A quick coupling component (2) comprises a valve member (1) for a main flow (4). Arranged in the valve member is a pressure reduction member with pressure reduction channel (7). The pressure reduction member comprises a shut-off element (8) which is arran... | 07/29/1997 |
| 5518024 | Overfill prevention device for storage tanks An overfill prevention device for storage tanks includes an elongate tubular housing having a liquid flow passageway. A normally open main valve and a normally closed vapor retaining bleed valve are associated with the fluid passageway. Closure of the mai... | 05/21/1996 |
| 5388622 | Automatic shutoff valve A two-stage float actuated shut-off valve for use in underground fuel storage tanks utilizes a drop tube coaxially mounted within the storage tank fill pipe. Fuel flowing into the tank is passed through the drop tube which projects downwardly into the int... | 02/14/1995 |
| 5335692 | Valve having rotatable cage A valve has an on-off control member disposed about an independently rotatable dynamic control member. The on-off control member, which interfaces with a sealing means, may be rotated to a closed position for shutoff purposes. Throttling operation is achi... | 08/09/1994 |
| 5241983 | Device for automatically controlling the flow of liquid into a tank The overfill device is of the type comprising a filling tube having a vertical axis and disposed in the tank, a butterfly valve disposed in the filling tube and movable between a vertical opening position and a closing position which corresponds to a bear... | 09/07/1993 |
| 5172722 | Stop valve for a vacuum apparatus A stop valve for a vacuum apparatus comprises a valve casing having an inlet port and an outlet port, a main valve element housed in the valve casing for selectively opening and closing a flow passageway for causing the inlet port to comunicate with the o... | 12/22/1992 |
| 5139051 | Unloading valve for an air compressor system Start up difficulties in gas compression systems due to undersized motors and/or low voltage conditions are avoided in a system including an electrically operated compressor (10, 36) including a compression chamber (34), a compressed gas reservoir (20) co... | 08/18/1992 |
| 4962783 | Butterfly valve apparatus and method A butterfly valve includes a duct defining a fluid flow path and a plate-like valve member pivotal in the duct to in one position open and close the latter. The valve member is pivotal to a second position spanning the duct and extending parallel to the f... | 10/16/1990 |
| 4896699 | Solenoid valve In a conventional solenoid valve, a solenoid coil is disposed on a spool of a non-magnetic material, which forms a magnetic path therefor. By contrast, according to the invention, a sleeve-shaped guide which is formed as part of a spacer of a magnetic mat... | 01/30/1990 |
| 4759255 | Brake booster with solenoid valves A brake booster includes a solenoid valve which enables the opening or closing of a passage which provides a communication between a constant and a variable pressure chamber through a valve mechanism. The invention utilizes an empty space left within the ... | 07/26/1988 |
| 4674922 | Apparatus and process for controlling a charging operation for a feed of particles of bulk material An apparatus having a charging lock chamber which can be alternately closed off with respect to a supply container by a movable closure head and an annular sealing edge in opposite relationship thereto as a seat therefor, on the one hand, and from a pneum... | 06/23/1987 |
| 4638974 | Electrohydraulic valve assemblies and method A solenoid operated valve assembly formed of a ferromagnetic end stop section and body section, an orifice section and a sleeve section of low magnetically permeable material. The sleeve section has an inner chamber with a centrally disposed portion of re... | 01/27/1987 |
| 4448216 | Subsurface safety valve A surface controlled subsurface safety valve having a ball type valve closure. The ball member and its associated components are protected from damage by preventing excessive control fluid pressure from applying force to the ball member. Also, rotation of... | 05/15/1984 |
| 4154403 | Spraygun A spray gun having a main air valve to regulate the flow of pressured air to the galleries of the gun, and bleed means to bleed air from the high pressure side of the valve to the low pressure side to reduce the effort required by an operator to use the g... | 05/15/1979 |
| 4027474 | Fuel prefill and distributor valve construction A fuel distributor valve for splitting and proportioning fuel feeding more than one set of fuel nozzles of a turbine type power plant is improved upon by adding thereto means to prefill the secondary nozzle and its attendant manifold and fuel passages imm... | 06/07/1977 |
