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| Number | Title | Issue Date |
| 7287547 | Inlet or outlet valve for a pump An inlet or outlet valve for a pump comprises a closing body (3) pretensioned by a spring element (4). The closing body (3) can open or close a passage on a valve seat (2). The valve also comprises a guide element (5) for guiding t... | 10/30/2007 |
| 7237569 | Ball check valve A ball check valve includes a mounting base, a valve cage and a valve ball. The valve cage is mounted on the mounting base and includes a base, multiple holding fingers and a filtering and regulating device. The holding fingers are formed on the base and are arrange... | 07/03/2007 |
| 7234480 | Telescopic snap valve A telescopic snap valve assembly and method of assembling a snap valve with a liquid holding bag in a box fitting. The valve assembly includes a valve member having a lower protruding telescopic end with a raised exterior lower edge. The telescopic end of the valve ... | 06/26/2007 |
| 7063516 | One-way valve A double diaphragm pump including an air manifold, two air chambers to either side of the air manifold, two pump chambers to either side of the air chambers and diaphragms extending between the air chambers and pump chambers are stacked together in horizontal assemb... | 06/20/2006 |
| 6899127 | Non-vibrating ball check valve A ball check valve comprises a valve body chamber which includes an inlet opening, an outlet opening, and a ball that is free to travel within the valve body chamber. A valve seat is adapted for receiving the ball. A body clearance section is located downstream of t... | 05/31/2005 |
| 6510869 | Ball check valve The present invention provides a ball check valve in which the area of a channel leading from a ball chamber to a discharge-side channel can be increased, and the adhesion of a ball to a valve seat surface is satisfactory even when the ball check valve is... | 01/28/2003 |
| 6280166 | Compressor having a valve mechanism of relatively high accuracy In a compressor in which a gas passage is made to have a first and a second end portion opposite to each other and conducts a gaseous fluid from the first end portion to the second end portion, a valve seat member is press-fitted into the first end portio... | 08/28/2001 |
| 6105610 | Cartridge valve with triple sequential seal A valve includes a valve body including a recess therein, a valve element movably disposed in the recess and a seal member disposed in the recess. The seal member has first, second and third separate and distinct sealing surfaces which are engageable by t... | 08/22/2000 |
| 6029685 | Cage assembly for ball check valves An improved cage assembly for ball check valves includes an insert comprising a unitary structure formed from STELLITE.RTM. having a passageway therethrough. A ball is positioned in the passageway of the insert for movement between two positions one of wh... | 02/29/2000 |
| 6007314 | Downhole pump with standing valve assembly which guides the ball off-center Disclosed is a standing valve containing a ball, in which during operation, the ball is moved by ball guides to a position off center and yet not impinged against the valve, and in which unequal fluid flow areas are created around the horizontal circumfer... | 12/28/1999 |
| 5799689 | Tubular refrigerant check valve with idented outer housing portion A check valve connectable in a refrigerant line is economically fabricated from only three parts--(1) a copper tubing body connectable in the refrigerant line, (2) a nonmetallic shutoff ball, and (3) an annular valve seat member having a conically tapered... | 09/01/1998 |
| 5797426 | Check valve and trap assembly A combination check valve and fluid trap device for connection to the outflow aperture of a condensate moisture drain system on an air conditioner, ice maker, cooler or like apparatus, the device comprising a ball float sealingly seated on a float seat wi... | 08/25/1998 |
| 5791374 | Check valve for the pre-combustion chamber of an internal combustion engine A check valve assembly is adapted to be installed in a pre-combustion chamber for an internal combustion engine. The check valve includes a ball closure element which is responsive to normal fuel/air supply pressure to be held in an open position and is r... | 08/11/1998 |
| 5785083 | Tubular refrigerant check valve with snap-together internal valve cage structure A check valve connectable in a refrigerant line is economically fabricated from only four parts--(1) a copper tubing body connectable in the refrigerant line, (2) a nonmetallic shutoff ball, (3) an annular valve seat member having a diametrically opposite... | 07/28/1998 |
| 5749394 | Check valve including molded valve seat A ball check valve including a housing and a ball element movably positioned in the housing. An insert member is located at an inlet port of the housing, and an elastomeric element is molded directly onto the insert member and is positioned facing toward ... | 05/12/1998 |
| 5662138 | Drop head structure The present invention relates to a water drop structure which not only functions as a water drop but also prevents pests from intruding indoors, smell from leaking indoors, and sewage back flow when the robe is clogged. It has a main body, main drum, cont... | 09/02/1997 |
| 5593292 | Valve cage for a rod drawn positive displacement pump A valve cage whose tubular side wall has a progressively diminishing thickness between the seat and the stop means, whereby the bore is tapered and upwardly enlarging in that interval. Therefore the flow area between the ball provided in the bore and the ... | 01/14/1997 |
| 5474541 | Valved nozzle for re-usable reservoir of a flowable product A re-usable nozzle for dispensing a flowable product from a resilient container has a removable one-way valve which facilitates cleaning and sterilisation of the nozzle. When the nozzle is used for dispensing a flowable pharmaceutical, the nozzle controls... | 12/12/1995 |
| 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 |
| 5370507 | Reciprocating chemical pumps Chemical pumps are disclosed in which all parts wetted by the fluid being pumped are made of fluoroplastic material, with the pumps having check valves that include floating ball members and O-rings positioned adjacent to the floating ball members. The re... | 12/06/1994 |
| 5348454 | Liquid pump resilient inlet insert for pumping high solids content liquids A liquid pump adapted for pumping liquids containing high percentages of solids in suspension, including a foot valve and pumping chamber, and having an insert in the pumping chamber adjacent the foot valve seat, the insert having a resilient inner surfac... | 09/20/1994 |
| 5297580 | High pressure ball and seat valve with soft seal A valve seat for a ball valve of a positive displacement pump for producing fluid from a subsurface formation wherein the valve seat is provided by a valve assembly having a non-corrosive hollow metallic housing therein which may have an internal radial g... | 03/29/1994 |
| 5232014 | Check valve A check valve includes a spherical closing member arranged in a flow duct of a valve body. The flow duct includes guide ribs with stop surfaces. The spherical closing member is displaceable by medium flowing through the valves between the stop surfaces an... | 08/03/1993 |
| 5183068 | Ball and seat valve The present invention relates to a ball and seat valve having an improved design that increase the reliability and fracture resistance of the seat. The fracture resistance of the seat is increased by providing the seat with a beveled edge. When a force is... | 02/02/1993 |
| 5178184 | Pump valve apparatus A valve having a tubular valve body, an inlet, an outlet and a flow passage therebetween. A valve seat is carried by the valve body at the inlet. A cylindrical cage with flow ports through its walls is carried by the valve body, the interior of which defi... | 01/12/1993 |
| 5012867 | Well flow control system A system for controlling flow in a well conduit including a landing nipple in the well conduit and a standing valve, which after landing in the landing nipple may be retrieved or expended from the landing nipple. The standing valve permits upward flow and... | 05/07/1991 |
| 4974628 | Check valve cartridges with controlled pressure sealing A check valve cartridge insertable into a valve housing which is adapted to couple to a pump fluid head. The check valve cartridge has a fluid pathway therethrough with a desired direction for fluid flow. The cartridge utilizes a ball-seat assembly to con... | 12/04/1990 |
| 4945945 | Check valve assembly for corrosive fluids A high pressure check valve assembly includes a ceramic cage loosely fitted into the bore of a body so as to leave at least a partial clearance between the cage and the body. A passage through the cage includes a retaining section adjacent a fluid inlet e... | 08/07/1990 |
| 4781213 | Ball check valve A ball check valve assembly for chemical pumps. A fluid conduit terminates at a first surface in a port of circular cross section. Within the conduit, an O ring seat is aligned with the port; an elastomeric O ring is positioned in the seat. Spacer means, ... | 11/01/1988 |
| 4691735 | Plunger valve apparatus for oil well pump A traveling valve or a standing valve for an oil well lift pump 10 includes a piston 36 which lifts a ball 50 above the valve seat 48 to open the valve and sets the ball 50 back onto the seat 48 to close the valve. The ball 50 is contained within a ball p... | 09/08/1987 |
| 4667696 | Flow valve An adjustable nonreturn ball valve for connection in a pipeline includes an elongate unobstructed main housing arranged to be connected at each end to flow pipes. There is an auxiliary housing located intermediate the ends of the main housing which has a ... | 05/26/1987 |
| 4513778 | Check valve In a subsurface positive displacement pump used in the petroleum industry for pumping crudes characterized by a high degree of suspended solid particles, a ball check valve comprising a valve ball and a valve seat assembly wherein the valve seat assembly ... | 04/30/1985 |
| 4387736 | Fluid control apparatus Fluid control apparatus including inlet and outlet check valve assemblies connected to a mounting block, filter means operatively associated with the check valve assemblies and a pulse damper device positioned on the mounting block for maintaining a conti... | 06/14/1983 |
| 4246002 | Flash arrester For use in a welding system which uses combustible gases and the like, a flash arrester comprising a main body having an opening therethrough and including a frusto-conical seat, and a ball cage body positioned in the main body and having an axial opening... | 01/20/1981 |
| 4243067 | Ball type check valve A check valve which has top and bottom flanges and a valve body thereinbetween. The flanges have aligned holes therethrough which serve as an inlet (bottom flange) and an outlet (top flange) for fluid flowing through the valve. A spherical ball is contain... | 01/06/1981 |
| 4162021 | Pressure-vacuum relief fuel tank cap with roll-over safety valve feature A pressure-vacuum cap for a chamber such as an automobile gas tank having a normally upwardly extending filler neck formed with a peripherally and radially extending, upwardly facing sealing surface concentric with the longitudinal axis of the neck, the c... | 07/24/1979 |
| 4155374 | Internal check ball retainer An internal check ball retainer for use in an in line check valve assembly has a M-shape configuration with a rectangular cross section. The in line check valve assembly includes a check valve having a check ball hole connected to a smaller through hole b... | 05/22/1979 |
| 4108203 | Check valve assembly A check valve assembly for use in a drill string to prevent reverse flow of drilling fluid through the string while permitting such fluid to be pumped downwardly through the well under normal conditions. The assembly includes: a valve body; a ball valve m... | 08/22/1978 |
| 4070237 | Automatic vacuum stabilizing valve An automatic adjustable bleed valve having an angularly displaceable valve body provided with an inlet opening and an outlet opening. A passageway interconnects a lower inlet and upper outlet openings. A gravity actuated displaceable valve element is moun... | 01/24/1978 |
| 4069840 | Ball check valve A check valve for permitting fluid flow in one direction and preventing flow in the reverse direction may comprise: a tubular body having a longitudinal flowbore therethrough; an annular seat within the flowbore; an inclined cylindrical pocket communicati... | 01/24/1978 |
