Did You Know...
...that power steering was invented by independent inventor Francis W. Davis? As chief engineer in the 1920s of the truck division of the Pierce Arrow Motor Car Company, he saw how hard it was to steer heavy vehicles. So that he would be able to keep the profits from his future invention, Davis left his job, rented a small engineering shop in Waltham, Mass., and developed a hydraulic power steering system that led to power steering.
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| Number | Title | Issue Date |
| 7178786 | Stem construction for rotatable valve body A valve stem construction for a manipulable valve member used to control fluid flow through a valve. The valve stem extends externally of the valve housing for engagement by a valve handle used to manipulate the valve member between open and closed positions. The va... | 02/20/2007 |
| 7163189 | Tapping valve of plastics material for transport and storage containers for liquids A tapping valve of plastics material for transport and storage containers for liquids, which is constructed as a flap valve or ball valve, includes a valve housing with an inlet connection connectable to an outlet connection of the liquid container and an outlet con... | 01/16/2007 |
| 6073648 | Metal element having a laminated coating A laminated coating protects a metal substrate in a highly corrosive and highly erosive environment. A coating of a noble metal, such as gold, is bonded to the metal substrate, such as by electroplating or by flame spray. The noble-metal coating protects ... | 06/13/2000 |
| 5170989 | Sealing assembly for valve member A seat assembly (28) for a valve member (20) includes a seat carrier (40) defining a pocket to receive a rigid seat ring (42). The outer peripheral surface (56) of the rigid seat ring (42) is spaced radially from the inner peripheral surface (45) of the s... | 12/15/1992 |
| 5069240 | Flexible seating structure for rotary valves A flexible seating apparatus is disclosed for use in rotary valves comprising a flexible seat ring attached to one of the valve body and valve closure member in a cantilevered fashion and maintained thereagainst by a resilient member, the latter being hel... | 12/03/1991 |
| 4976403 | Valve with metallic bellows valve stem seal A fire-resistant valve 10 with a valve stem 40 mounted for linear motion through a valve stem bore 41 in the valve body 12 and connected to a valve element 20 by a connection means which effects movement of the valve element 20 between its valve open and ... | 12/11/1990 |
| 4936545 | Ball valve for refrigerating systems Improved ball valve for refrigerating systems, formed by a valve body and an inlet duct and an outlet duct. The other component parts such as a ball shutter, a circular flange, a closure member, an actuating means and sealing means are all mounted by intr... | 06/26/1990 |
| 4911409 | Ball valve There is disclosed a ball valve which includes a ball closure rotatably mounted within a cavity formed in a main portion of the valve body and spring pressed against a seat ring on one side of the ball closure, and an end portion of the valve body which i... | 03/27/1990 |
| 4911408 | Seat assembly for ball valves A top entry ball valve (10) has a removable top plate (34) to permit the removal of a ball valve member (80). Valve seat assemblies (98, 100) each include a primary metal seat member (102), a concentric secondary elastomeric seat member (104), and a conce... | 03/27/1990 |
| 4890816 | Valve seats A metal valve seat for a butterfly valve or ball valve and has the form of an apertured disc with a radially outward part (4A) by which it is securable to a valve body and a radially inward dished part (4B) which projects laterally around the disc apertur... | 01/02/1990 |
| 4753443 | Composite annular seals for rotary ball valves and ball joints A composite annular seal for a rotary ball valve or ball joint comprises a sealing ring (C) of low friction material intended to engage the ball (2), a first metal ring (A) of which part of one face is adapted resiliently to engage and conform with part o... | 06/28/1988 |
| 4671308 | Fire-safe ball valve An improved, soft-seated fire-safe ball valve is disclosed. The ball valve includes a body having a central passageway, a ball member positioned in the passageway, and a pair of radially inwardly extending shoulders in the passageway disposed circumferent... | 06/09/1987 |
| 4667926 | Ball valve A ball valve in which, even when a connecting sleeve is removed by loosening the associated union nut, the ball and annular seals of the valve will not blow out of the valve body under fluid pressure. A ball with an integral spindle is arranged in the val... | 05/26/1987 |
| 4637421 | In-line repairable top entry ball valve An in-line repairable top entry floating ball valve having internal components that are replaceable through an access opening, closed by a valve bonnet, while the valve body is located within a flow line. The valve mechanism is provided with seats which m... | 01/20/1987 |
| 4545564 | Valve Valve in which a flow-control ball and two conical seals are enclosed in a unitary housing, the housing being formed from a tube of malleable metal, the tube being formed to provide two opposed conical portions after the elements have been inserted in the... | 10/08/1985 |
| 4531273 | Method for fabricating graphite filled sintered metal seats for ball valves A valve seat for ball valves comprises a ring-shaped or annular body fabricated of sintered metal particles having interparticulate spaces which are substantially completely filled with graphite. The seat is fabricated by pumping a dispersion of colloidal... | 07/30/1985 |
| 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 |
| 4502663 | Cock having a spherical plug The present invention relates to a cock having a spherical plug which is supported between two annular sealing elements intended to seal the inlet channel and outlet channel thereof, of which two sealing members at least one consists of a resilient sealin... | 03/05/1985 |
| 4428561 | Ball valve having improved seal means A ball valve operable between a fully-open position and a closed position for regulating fluid flow includes a valve body machined and arranged with a flow passageway extending completely therethrough and receiving at each end a fluid fitting for coupling... | 01/31/1984 |
| 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 |
| 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 |
| 4269391 | Valve sealing device and a valve A valve sealing device is proposed consisting of two parts, one of which contacts the body of the valve and is made of an expanded graphite compact or an expanded graphite--inorganic binder composite compact, and the other of which contacts the valve memb... | 05/26/1981 |
| 4247080 | Seal assembly for valves There is disclosed a seal assembly for sealing between the body of a valve and the closure member thereof, as well as a method for mounting the assembly within an annular groove with the body which surrounds the flowway through one side of the valve. The ... | 01/27/1981 |
| 4235418 | Ball valve having metal seat rings This relates to a ball valve of the top entry non-spherical type. A soft metal coating is deposited on that portion of the seat ring which contacts the valve member or ball. The ball and seat assembly is inserted into a valve chamber such that the seat ri... | 11/25/1980 |
| 4231545 | High pressure ball valve with tipping action A ball valve or the like for high pressure operation having a connection between the actuating stem and the body wall which allows tipping of the ball valve under pressure into tight sealing engagement with the sealing ring at the outlet end of the valve.... | 11/04/1980 |
| 4160478 | Well tools A well tool for inclusion in a tubing string of a well adapted to perform multiple functions including controlling fluid flow through the tubing string and/or cutting coiled tubing or wire line used in the tubing string for performing well completion and ... | 07/10/1979 |
| 4150810 | Machine welded obturator The invention relates to machine welded obturators of generally spherical shape for equipping rotary plug valves. These obturators are composed of a central tube and an envelope formed by two hemispherical segments of pressed sheet metal which are truncat... | 04/24/1979 |
| 4134426 | Seawater hydraulic motor distributing valve based on a hydrosphere bearing A commutating or distributing valve for timing and distributing high prese seawater to a number of individual pistons in a multi-piston hydraulic motor using seawater under pressure as a motivating fluid.... | 01/16/1979 |
| 4117694 | Rotatable refrigerated valve A ball valve for use in a vacuum pumping system has the passage through the valve element provided with a series of metal plates disposed for contact by gas passing through the valve when open. A refrigerant conduit entering the passage through the neck o... | 10/03/1978 |
| 4006881 | Fluid-tight packing for closure devices and devices fitted with said packing At least part of a packing which is compressed between two components of a closure device such as a cock or valve is cut from a sheet of carbonaceous material formed by the association of carbon fibers with expanded graphite and compacted at least to a pa... | 02/08/1977 |
| 3985150 | Ball valve for valving abrasive fluids A valve assembly for valving abrasive fluids. A ball valve member is provided for rotation in a body member, the body member having inlet and outlet bores therein. Tubular inserts of abrasion resistant material - such as boron carbide - are provided in th... | 10/12/1976 |
| 3949965 | Ball valve A small ball valve for chemically active materials is provided which does not require the strength of metal parts and which permits the use of brittle material such as glass or ceramic as well as materials such as fluorocarbon polymers and polytetrafluoro... | 04/13/1976 |
