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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 |
| 7618244 | Compressor valve plate A valve plate assembly for a compressor includes a first plate and a second plate disposed between and providing communication between a compressor head and a compressor body. The first and second plates are separated by a spacer supporting a load approximately cent... | 11/17/2009 |
| 7367789 | Device for maintaining a static seal of a high pressure pump A pressure enclosure includes a first component having an opening, a second component coupled to the first component in a position over the opening, a third component positioned between the first and second components and covering the opening, and a load chamber def... | 05/06/2008 |
| 7364413 | Reciprocating compressor with enlarged valve seat area A reciprocating compressor is provided with a discharge valve having an area inward of a valve seat which is greater than the area of the discharge port. The valve seat also has a distinct shape compared to the valve port in preferred embodiments. The increased area... | 04/29/2008 |
| 7328688 | Fluid pumping apparatus, system, and method A fluid pumping apparatus, system, and method are disclosed in which an apparatus according to one embodiment of the invention comprises a housing, an inlet through which the fluid enters the housing, an outlet through which the fluid leaves the housing, a valve com... | 02/12/2008 |
| 7247006 | Method and apparatus for sealing an ultrahigh-pressure fluid system An ultrahigh-pressure fluid system, such as an ultrahigh-pressure fluid pump, includes an improved dynamic seal assembly that can withstand pressures above 40,000 psi, and more preferably, pressures up to and beyond 87,000 psi. The dynamic sealing assembly includes ... | 07/24/2007 |
| 7121812 | High pressure pump having replaceable plunger/valve cartridges A high pressure fluid jetting system generally includes a fluid cylinder pump, a drive assembly, a pressurized liquid supply and an applicator gun. The drive assembly includes a diesel engine or electric powered motor which drives a rotatable drive shaft. The drive ... | 10/17/2006 |
| 7074022 | Discharge valve assembly for reciprocating compressors A reciprocating compressor including cylinder block with a plurality of cylinder bores. A piston is positioned in each bore and mounted to move in response to the a crankshaft, causing each piston to reciprocate within the cylinder bore. The compressor further inclu... | 07/11/2006 |
| 7059366 | Air bleed mechanism for a submersible turbine pump A manifold for a submersible turbine pump having an air bleed mechanism for removing air from a discharge chamber of the manifold. The manifold includes the discharge chamber that receives fuel pumped from an underground storage tank (UST), the air bleed mechanism, ... | 06/13/2006 |
| 7040877 | Compressor valve plate A valve plate assembly includes an upper valve plate, a lower valve plate, an annular spacer and a center spacer. The annular spacer is located between the upper and lower valve plates and around the outer periphery of the upper and lower valve plates. The center sp... | 05/09/2006 |
| 7029245 | Blood pumping unit, with a coplanar disk inlet valve and an annular outlet valve A unit for pumping fluid, particularly blood, is provided with an enclosure that has two half-shells and an elastic membrane fixed perimetrically to the enclosure in order to divide its space into two parts. One of the half-shells is provided with valves that are lo... | 04/18/2006 |
| 6960068 | Center valve sleeve retention system for an oscillating pump A pump (10) includes an impeller (12) positioned in a housing (11). A valve assembly (13) is positioned within a valve sleeve (25) which is carried by the impeller (12). The impeller (12) is carried by an armature ( | 11/01/2005 |
| 6921253 | Dual chamber micropump having checkvalves A micropump has two chambers separated by an actuator for causing fluid to flow in the chambers. Each chamber is equipped with a ball that acts as a valve for allowing flow in a desired direction. The balls are heavier than the fluid being pumped, and reside at an i... | 07/26/2005 |
| 6843645 | Cooling system for a magnetic pump A magnet pump includes a synthetic resin casing, divided into a front casing and a rear casing and configured to internally form an impeller housing chamber and a magnet can housing chamber contiguous thereto, having an inlet and an outlet for a target fluid to be t... | 01/18/2005 |
| 6837694 | Hydraulic pump unit with orifice plate for vehicle brake control system A hydraulic pump unit for vehicle brake control system comprising a pump housing, a cylinder received in a receiving hole formed in the pump housing. The cylinder has a bottom portion and is provided at the bottom portion with an outlet valve. A plunger is slidingly... | 01/04/2005 |
| 6767195 | Valve for hermetic compressor A valve for a hermetic compressor has a valve plate disposed between a cylinder block and a cylinder head. The cylinder block has a cylinder, and the cylinder head has a refrigerant suction chamber and a refrigerant discharge chamber, which are partitioned from one ... | 07/27/2004 |
| 6705846 | Piston pump In a piston pump, in particular for pressure medium delivery in slip-controlled hydraulic brake systems, including a suction valve and a delivery valve, external preassembly and possibilities of external testing of the delivery and suction valves result from providi... | 03/16/2004 |
| 6514055 | Piston pump having a hollow piston The invention relates to a piston pump for a slip-controlled hydraulic vehicle brake system. For the sake of a short structural length of the piston pump, piston of the piston pump is a hollow piston, whose interior forms a positive displacement chamber o... | 02/04/2003 |
| 6497562 | Piston pump In a piston pump (1), in particular for pressure medium delivery in slip-controlled hydraulic brake systems, including a suction valve (82) and a delivery valve (81), external preassembly and possibilities of external testing of the delivery and suction v... | 12/24/2002 |
| 6453940 | Insert bonded combination valve A combination valve including a metal sleeve and a valve body. The valve body is formed of a resilient material and insert bonded or vulcanized to the metal sleeve and includes a cylindrical elongated member defining a passageway therethrough and an annul... | 09/24/2002 |
| 6382940 | High pressure plunger pump housing and packing A Y-block fluid section plunger pump housing has a cylinder bore which is transversely elongated at its intersection with suction and discharge bores to provide stress relief and a reduction in housing weight. An integral suction valve retainer arm furthe... | 05/07/2002 |
| 6368071 | High pressure fuel pump An axial plunger pump includes a shaft having a swash plate effecting swing motion and transmitting driving force from the outside, plungers reciprocate by the swing motion of the swash plate. A cylinder block has cylinders formed so as to open on the sid... | 04/09/2002 |
| 6241492 | High pressure pump A high pressure fluid pump 10 supplies fluids to a water blasting or cutting gun 14. The pump 10 is preferably of the in-line type, wherein both an inlet check valve 60 and a discharge check valve 62 move linearly along the axis 40 of the plunger 30 durin... | 06/05/2001 |
| 6231323 | High pressure reciprocating pump A high pressure reciprocating pump (10) for high fluid pressures between 30,000 and 60,000 psi and having a valve cartridge (57) positioned within a manifold block (15) of the pump (10). The valve cartridge (57) has a fixed body (58) with a plurality of e... | 05/15/2001 |
| 6193483 | Full flow tubing stationary valve pump apparatus A full flow tubing stationary valve pump apparatus includes an cuter annulus barrel, an inner working barrel positioned in radially inwardly spaced relation from the outer annular barrel to define a vertical flow annulus therebetween, an elongated inner p... | 02/27/2001 |
| 6162031 | Seal seat for high pressure pumps and vessels A seal assembly for a high pressure vessel. The pressure vessel can include a first material and can have a face with a bore extending through the face such that the bore has an edge at an intersection of the bore and the face. A check valve, including a ... | 12/19/2000 |
| 6135735 | Piston pump The invention relates to a piston pump for a slip-controlled hydraulic vehicle brake system. For a compact structure of the piston pump, an inlet valve and outlet valve in the form of check valves be disposed in a valve bore at a tangent to a cylinder bor... | 10/24/2000 |
| 6132180 | Automatic pumping apparatus utilizing wave motion An automatic pumping apparatus utilizing wave motion comprises one or more than one sink-and-float members provided so as to move up and down in accordance with a wave motion, positioned below the respective sink-and-float members, connected to the respec... | 10/17/2000 |
| 5924853 | High pressure pump A high pressure fluid pump 10 supplies fluids to a water blasting or cutting gun 14. The pump 10 is preferably of the in-line type, wherein both an inlet check valve 60 and a discharge check valve 62 move linearly along the axis 40 of the plunger 30 durin... | 07/20/1999 |
| 5636975 | Inlet and discharge valve arrangement for a high pressure pump A high-pressure, plunger-type liquid pump including a liquid manifold that includes a plunger chamber in the form of an axial cylindrical bore portion for slidably receiving a pressurizing plunger, and that also includes a valve chamber coaxial with the p... | 06/10/1997 |
| 5609477 | Inlet/outlet valve arrangement for a fluid pressure intensifying apparatus A fluid pressure-intensifying apparatus of the double-acting type has end check valve assemblies (25, 25a). Each assembly has an inner low pressure poppet (100) communicable with the high pressure chamber (30) of the apparatus, and an outer high pressure ... | 03/11/1997 |
| 5605449 | Suction and discharge valve arrangement for a high pressure piston pump There is provided a fluid side of a high pressure water pump is to be used with a pump having a power side which has at least one piston and at least one stuffing box. The fluid side consists of a unitary substantially block shaped fluid end which defines... | 02/25/1997 |
| 5472326 | Valve assemblies for sucker rod operated subsurface pumps This invention relates to an improvement in valve assemblies for reciprocating sucker rod operated subsurface pumps and specifically as to the traveling valves and standing valves. The traveling valve includes a valve body having an inwardly-directed lip ... | 12/05/1995 |
| 5370504 | Ambulant reciprocating compressor having plural pressure collection chambers A pair of oppositely directed pistons are reciprocatingly mounted in a cylinder. The cylinder is formed unilaterally with and encapsulated within a tank for receiving compressed air and has an exhaust port at each end and a valve for controlling the flow ... | 12/06/1994 |
| 5362216 | Coaxial valve arrangement for high pressure positive displacement pumps A positive displacement pump wherein the housing has a thin one-piece plate-like head bolted to the adjacent end of a casing for one or more reciprocable plungers. Each plunger is coaxial (a) with a suction intake valve installed in a larger-diameter port... | 11/08/1994 |
| 5277560 | Ring valve type air compressor with deformable ring valves A ring valve assembly for use in a reciprocating type fluid pump with a piston cylinder and a cylinder head includes a ring valve having a fluid seal surface for selectively closing a fluid passage of a cylinder head and an annular ring retainer having a ... | 01/11/1994 |
| 5253987 | Fluid end for high-pressure fluid pumps A fluid end for use in high-pressure, reciprocating, fluid pumps has a cylinder with a bore therethrough in which a plunger reciprocates. A valve body is disposed at one end of the bore and includes suction valve seat and a discharge valve seat, which are... | 10/19/1993 |
| 5213487 | Ring valve type air compressor with deformable ring valves A ring valve assembly for use in a reciprocating type fluid pump with a piston cylinder and a cylinder head is disclosed. The valve assembly includes a ring valve having a fluid seal surface for a selectively closing a fluid passage of a cylinder head and... | 05/25/1993 |
| 5147189 | Pressure pump with sealing sleeve between head and chamber A maximum-pressure plunger plump has, coaxial with its longitudinal axis, a compression valve and a suction valve. It has a sleeve that floats on a plunger. The sleeve rests on the end facing the head of the pump on an inset. the inset is provided with a ... | 09/15/1992 |
| 5064354 | High pressure fluid pump An improved high pressure, piston pump has at least one two-piece telescoping cylinder having an end flange at one end and a housing containing piston drive means at the other end which are held together by tie rods passing through spacer tubes. The cylin... | 11/12/1991 |
| 5037276 | High pressure pump valve assembly A high pressure fluid pump having a reciprocating piston which pumps fluid through a central passageway in a valve body of a valve assembly. The valve body forms with an end section of the housing a high pressure fluid chamber axially aligned with the pis... | 08/06/1991 |
