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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 |
| 7225830 | Fluid control valve A fluid control valve having a spring biased shuttle plunger member which opens or closes fluid flow through a plurality of radially spaced apart fluid passageways disposed between an upstream chamber and downstream chamber in the valve body responsive to a fluid pr... | 06/05/2007 |
| 6539974 | Valve with guide extensions for valve plate The valve includes a valve seat (1) having passage channels (2) for the controlled medium which are arranged essentially in a ring-shape and concentrically, of a catcher (3) having flow-off channels (4), a valve plate (5) that is movably arranged, in part... | 04/01/2003 |
| 6530395 | Check valve arrangement A check valve arrangement utilizes a disc (15) for a valve member while eliminating the need for a ball. A valve seat in the common sense is unnecessary, too. Instead, a substantially flat surface (13) interacts with the disc (15). In order to allow unidi... | 03/11/2003 |
| 6510868 | Profiled plate valve The subject application is directed to a compressor valve having a valve seat, a valve guard and a sealing plate with contoured sealing surfaces, the valve seat having defining inlet flow ports for admitting a controlled medium into the valve, the lower s... | 01/28/2003 |
| 5785081 | Compressor inlet valve An inlet valve assembly for an air compressor and/or compressor-exhauster having a plug member disposed in a cylinder head. A buffer plate screwed onto the lower end of a multi-threaded stud. A spring plate disposed on top of the buffer plate and a guide ... | 07/28/1998 |
| 5669411 | Compressor valve A novel compressor valve is disclosed. Generally, the valve includes a valve guard containing a flange portion formed thereon. The valve will contain a valve seat adapted to engage the valve guard. The valve contains a first sealing plate and a second sea... | 09/23/1997 |
| 5275541 | Fluid-operated valve for pumps and the like A diaphragm pump has a first fluid-operated valve which opens when the diaphragm performs a suction stroke and a second fluid-operated valve which opens when the diaphragm performs a compression stroke. The volumetric efficiency of the pump is enhanced by... | 01/04/1994 |
| 5232354 | Compressor discharge valve assembly having plural wave ring biasing means A hermetic compressor including a crankcase defining a cylinder. The crankcase has an annular recess formed in the discharge end thereof which defines a shoulder. A cylinder head is disposed over the annular recess. A discharge valve assembly is disposed ... | 08/03/1993 |
| 4951706 | Flapper check valve This invention relates to a flapper check valve having a valve housing which has at least one outlet opening. A valve backer plate having a plurality of arcuate backer through holes is positioned generally parallel to a valve port plate having a plurality... | 08/28/1990 |
| 4924906 | Ring valve The valve plate (6) which is spring-loaded against the valve seat (2) of the ring valve comprises individual annular plates (10) disposed over the passage channels (1) of the valve seat, plus a support plate (11) which lies jointly on all the annular plat... | 05/15/1990 |
| 4705068 | Ported-plate, fluid control valve The valve comprises a configuration in which the flow-through paths are more uniformly and smoothly arranged, albeit incorporating additional paths vis-a-vis prior art valves of like overall dimensions. The additional paths are accommodated through relief... | 11/10/1987 |
| 4106816 | Hub cap for trailer wheels and the like A hub cap for a vehicle wheel, such as a boat trailer, which hub cap retains grease and blocks water flow into the wheel bearing while providing for automatic expulsion of excess grease when pressure increases within the hub, such as is caused by heating ... | 08/15/1978 |
| 4028243 | Relief valve for a fluid filter assembly Flexible assembly facilitating members attached to the valve body of a relief valve for a fluid treatment assembly, such as a fluid filter assembly, serve to maintain the valve components as a unit prior to assembly of the valve into the fluid filter asse... | 06/07/1977 |
