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Dionysius Lardner, Professor of Natural Philosophy and Astronomy at University College, London ; 1830
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| Number | Title | Issue Date |
| 7093819 | Ball valve with shear bushing and integral bracket for stem blowout protection A valve 100 comprising a one piece valve body 112 having an axial fluid bore 124 and a rotatable fluid control element 110. The body 112 includes an integral bracket 128 which provides an open access area between the bracket... | 08/22/2006 |
| 6488265 | Ball valve assembly An improved ball valve assembly is provided for use on firefighting equipment and other applications. The ball valve assembly includes an improved seal assembly which includes both a load bearing seal element and a soft elastomeric seal element. Both seal... | 12/03/2002 |
| 6286811 | Ball valve assembly An improved ball valve assembly is provided for use on firefighting equipment and other applications. The ball valve assembly includes an improved seal assembly which includes both a load bearing seal element and a soft elastomeric seal element. Both seal... | 09/11/2001 |
| 5820103 | Ball segment valve and ball segment valve arrangement A ball segment valve comprise a valve housing (23) with a circular annular valve seat (28), a valve body (26) which has the shape of a spherical segment which is rotatable about an axis of rotation (49) which intersects the center of the sphere of which t... | 10/13/1998 |
| 4928921 | Ball valves for pipelines In a ball valve, valve seats are spring-urged against a valve ball turnable between open and closed position. Each seat has an annular face confronting the ball, the face being a surface of revolution of a line inclined to the said axis. The face is inter... | 05/29/1990 |
| 4505294 | Slurry valve A ball valve is provided to transmit high density substances such as fluids which are free flowing at elevated temperatures but which are viscous, semi-solid or solid at ambient temperatures. Such substances tend to clog standard ball valves over relative... | 03/19/1985 |
| 4449544 | Blowdown valve A ball valve is provided for cleaning out piping systems between steam boilers and turbine generators of electrical power generating plants prior to start up operations. The valve is designed to minimize impingement between foreign substances trapped in t... | 05/22/1984 |
| 4386756 | Self centering floating metal seal for a ball valve The invention is an improved self-centering, floating metal seal to be used in combination with a ball valve which controls the flow of fluid in a conduit. The ball valve includes a valve body which has a bore extending therethrough and which also has an ... | 06/07/1983 |
| 4326697 | Valves with non-lubricated plug Valves or cocks with rotary plug in which the plug is provided with flexible gaskets of annular shape located symmetrically with respect to the plane passing through the axis of rotation of the plug and the axis of the cylindrical conduit of the plug, sea... | 04/27/1982 |
| 4273309 | Valve mechanism incorporating universal seat spring A valve mechanism according to the present invention incorporates at least one movable valve seat that is received within a seat pocket of the valve body and establishes sealing engagement with a movable valve element. An annular universal seat spring for... | 06/16/1981 |
| 4262688 | Metal seat assemblies for valves A metal seat assembly (40) for sealing against the sealing surface of a valve member movable between open and closed positions. The seat assembly comprises an outer metallic ring (44) having an inwardly extending metal seal lip (58) hinged to the main bod... | 04/21/1981 |
| 4258900 | Structure maintaining seats against ball valves A ball valve assembly that is solids-proof, corrosion-resistant, will maintain seals even under large pressure differentials, and can operate from cryogenic levels to high temperature ranges. An annular recess is formed in the valve body adjacent the ball... | 03/31/1981 |
| 4258901 | Valve sealing device A sealing device for a valve which includes a valve body having a fluid passage and an inner valve for opening or closing said fluid passage, said sealing device comprising a seat packing disposed in a peripheral groove formed in the valve body and partly... | 03/31/1981 |
| 4226263 | Erosion control trim in a control mechanism for a ball valve The invention is an improvement for controlling the flow of fluid in a conduit to be used in combination with a ball valve. The ball valve includes a valve body which has a bore extending therethrough and which also has an inlet and an outlet which are ax... | 10/07/1980 |
| 4217923 | Ball valve with readily removable ball and seats for high temperature environment A ball valve assembly in which the ball and valve seats are readily removable from the valve housing, the valve being designed for a high temperature environment. The valve seats cooperate with seat supports and the ball, each of two valve seats comprisin... | 08/19/1980 |
| 4180244 | Stopcock formed of sheet metal A stopcock with the exception of its shaft, journal and bearings, is constructed of a plurality of sheet metal parts welded together to form a housing and a plug rotatably mounted in the housing. The housing is made up of a tubular member with ring disks ... | 12/25/1979 |
| 4147327 | Metallic seals for ball valve A ball or spherical plug valve has a pair of annular metallic seal rings mounted in grooves in the valve chamber around the inlet and outlet passageways of the valve body. Each metallic seal ring is of a one-piece generally uniform angled cross-section to... | 04/03/1979 |
| 4140149 | Plug cock Plug cock equipped with a rotating plug, which comprises a cylindrical body pivoting about an axis perpendicular to the axis of the cylinder and through which passes a conduit for the passage of fluid, which body comprises, at least one of its two axial e... | 02/20/1979 |
| 4085770 | Seat and trunnion assemblies for rotary valves A plug valve is disclosed having a valve chamber with inlet and outlet flow passages in fluid communication therewith, at least one of the flow passages having a generally cylindrical seat recess formed therein about the flow passage and an axially movabl... | 04/25/1978 |
| 4084785 | Ball valve with linear elastomeric seal mounting A ball valve where a housing with inlet and outlet ports encompasses a ported gate having spherical surfaces and mounted for rotation about an axis perpendicular to one of the ports. A linear spring assembly seals the ported gate and includes a structure ... | 04/18/1978 |
| 4076211 | Ball valve A ball valve having a valve body, a main flow passage therethrough, a lateral bore extending generally perpendicularly through the passage, and a unitary ball valve member received in the lateral bore. The ball valve member has a spherical ball portion wi... | 02/28/1978 |
| 4054262 | Cock having a rotating valve removable from above A cock valve includes a hollow body having first and second opposite end portions with the first end portion having a circular upper aperture formed therein. A valve is rotatably positioned within the body for rotation about an axis extending between said... | 10/18/1977 |
| 3985334 | Ball valve A ball valve with an actuator wherein a seal assembly with a combination O-ring swivel and seal for producing a tight seal is hidden in a pocket isolated from the flow of fluid through the valve by an inlet reentrant flange and the valve body. The swivel ... | 10/12/1976 |
| 3960363 | Ball valve A ball valve with an actuator wherein a seal assembly with a combination O-ring swivel and seal for producing a tight seal is hidden in a pocket isolated from the flow of fluid through the valve by an inlet reentrant flange and the valve body. The swivel ... | 06/01/1976 |
