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| Number | Title | Issue Date |
| 7168440 | Valve body and seal assembly A valve body and seal assembly comprising a top-stem-guided valve body having at least one cast-in-place elastomeric seal insert in a peripheral seal retention groove and a cast-in-place top guide stem sleeve is made by pouring and curing liquid elastomer in at leas... | 01/30/2007 |
| 7000632 | Valve apparatus A valve apparatus that has a longitudinal axis therethrough comprises a valve seat member, a valve closure member, a fluid flow path, and a screening member. The valve seat member comprises a hollow bore and a first frustoconical contact surface. The valve closure m... | 02/21/2006 |
| 6955181 | Valve body and seal assembly A valve seal assembly comprising a valve body having one or more peripheral integral seal retention grooves and one or more peripheral elastomeric seals, each seal being cast-in-place in an integral seal retention groove having adhesion-inhibiting surfaces and offse... | 10/18/2005 |
| 6701955 | Valve apparatus A valve apparatus that has a longitudinal axis therethrough comprises a valve seat member, a valve closure member, a fluid flow path, and a screening member. The valve seat member comprises a hollow bore and a first frustoconical contact surface. The valv... | 03/09/2004 |
| 5740810 | One hand push button fast flush device A flush device for an intravenous blood pressure monitoring system has a main body which includes a continuous capillary flow channel and a fast flush channel. The continuous capillary flow channel is separated from the fast flush channel by a median wall... | 04/21/1998 |
| 5431186 | Valve body design for use with pumps handling abrasive fluids An improved plastic valve body design and construction which has strength and durability similar to that of steel valve bodies but with significantly reduced manufacturing time and cost. The valve body comprises a unique and nonobvious combination of a pr... | 07/11/1995 |
| 5345965 | Valve body design for use with pumps handling abrasive fluids An improved plastic valve body design and construction which has strength and durability similar to that of steel valve bodies but with significantly reduced manufacturing time and cost. The valve body comprises a unique and nonobvious combination of a pr... | 09/13/1994 |
| 5249600 | Valve seat for use with pumps for handling abrasive fluids An improved valve seat which significantly decreases the impact stress caused by the impact of a mud pump valve body against the valve seat. The valve seat comprises a generally cylindrical body portion with a sealing surface which is sloped from the oute... | 10/05/1993 |
| 5226445 | Valve having convex sealing surface and concave seating surface A valve includes a seat surrounding an orifice having a concave seating surface and a plug having an annular sealing surface for sealingly contacting the seat. The sealing surface is convex and creates a convex discontinuity in an axially-extending, cross... | 07/13/1993 |
| 5088521 | Mud pump valve A valve for use in a valve housing which forms a flow passage, an annular valve seat being provided in the passage and the seat forming an annular seal surface, the housing, the seat and the passage being concentric on a valve axis. The valve includes a v... | 02/18/1992 |
| 5082020 | Valve body for oilfield applications A valve body for use in cementing, fracturing or acidizing operations in well drilling with improved wear resistance to extend the operating life of the valve. The valve includes a hardened metal valve head having urethane legs replaceably attached to the... | 01/21/1992 |
| 5062450 | Valve body for oilfield applications A valve body for use in cementing, fracturing or acidizing operations in well drilling with improved wear resistance to extend the operating life of the valve. The valve includes a hardened metal valve head having urethane legs replaceably attached to the... | 11/05/1991 |
| 4922957 | Valve with replaceable seal element A valve assembly comprises a rigid seat and a valve for opening and closing the seat. The valve comprises a rigid valve body and an elastomeric seal element mounted on the valve body. The seal element includes smoothly concave seat-engaging surface which ... | 05/08/1990 |
| 4860995 | Valve element for use in pumps for handling fluids containing abrasive materials A valve element for use in a high pressure pump, the valve element having a body portion with a top side and a bottom side, a guide means attached to and projecting away from the bottom side of the body portion and an insert secured to the top side of the... | 08/29/1989 |
| 4819689 | Head-guided poppet valve member and valve assembly A poppet valve assembly includes a cage with a cage fluid passage and a seat with a seat fluid passage. A poppet valve member includes a head and is movable between a closed position with the head engaging the seat and an open position with the head space... | 04/11/1989 |
| 4770206 | Mud pump valve Disclosed is a mud pump valve which includes a seat ring adapted for insertion in a mud pump. The seat ring includes a frusto-conical seating surface and an annular seal ring groove about its outer periphery. A seal ring is positioned in and bonded to the... | 09/13/1988 |
| 4545404 | Bonded valve with replaceable insert The invention is of a valve member having a replaceable deformable insert installed in a groove of the member and a deformable backup member secured to the valve member, preferably by bonding, and abutting so as to abut at least a major portion of a trans... | 10/08/1985 |
| 4487222 | Poppet type fluid valve with replaceable wear surface A fluid valve suitable for use in slush pumps is disclosed. The valve includes an elastomeric seal and a metal wear ring held in place on a valve body by a retaining ring. Thrust of the valve body against a valve seat is absorbed by the wear ring which is... | 12/11/1984 |
| 4479508 | Reinforced valve member A reinforced valve member including a body having upstream and downstream sides and an annular rim forming a first sealing surface. A frusto-conical portion of the body extends upstream from the first sealing surface and displays a second sealing surface.... | 10/30/1984 |
| 4448390 | Vacuum control valve for automotive heating and airconditioning systems A vacuum control valve comprising a body having a valve surface with a plurality of valve ports extending through the body from such surface, a soft resilient valve member having a control surface slidable along the valve surface and formed with passage m... | 05/15/1984 |
| 4393895 | Check valve for use with high pressure pump A check valve for use with a high pressure sludge pump in which a valve member such as a ball is movable toward and away from a valve seat in the inlet to the valve housing, and which valve has a valve member lift limiter adjustably mounted on the valve b... | 07/19/1983 |
| 4206901 | Pressure-actuated valve with metering choke A metering apparatus for controlling the rate of closure of a pressure-actuated valve of a type normally used in irrigation systems. When a pressure-actuated valve is closing, fluid from a supply line must flow into a pressure-actuating chamber, gradually... | 06/10/1980 |
| 4180097 | Mud pump valve A mud pump valve including a seat ring having an upwardly facing frusto-conical seating surface and a generally flat closure disc having a downwardly facing frusto-conical seating surface at the lower end thereof. The disc has a groove around the peripher... | 12/25/1979 |
| 4076212 | Stretch seal valve An improved valve for high speed, high pressure pumps, having a dished, rectangular-sectioned, radially stretched seal overhanging the valve body to both cushion and seal the body's closure against the valve seat, and which is pre-stressed in tension suff... | 02/28/1978 |
