Did You Know...
...that after Parker Brothers executives turned down the game of Monopoly because it had "52 fundamental errors" (including taking too long to play), a copy of the game wound up in the home of the company president who stayed up until 1 a.m. to finish playing it? He was so impressed by the game that the next day he wrote to inventor Charles Darrow and offered to buy it!
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| Number | Title | Issue Date |
| 7258256 | Surface pressure load device of slide valve A surface pressure releasing plate and a surface pressure releasing bar are slidable relative to each other smoothly by compressing compression springs uniformly. A surface pressure applying device for a slide valve according to the present invention compresses comp... | 08/21/2007 |
| 7137974 | Sterile connector A sterile to sterile connection device comprising a connector and one or more coupling devices. The connector has body portion which has two openings sealed from the environment so as to form a sterile environment within the connector. At least one of the openings b... | 11/21/2006 |
| 6745999 | Gate valve for high-density slurries, and a valve body assembly, and a solids-containing wall lining means therefor Flexible, plastic, solids-containing liners or panels are disposed in the chamber of the valve body for contacting, interfacing engagement with the gate. Accordingly, the panels and gate substantially fully occupy the chamber, and prevent an entry of slurry solids t... | 06/08/2004 |
| 6561483 | Gate valve A gate valve according to the present invention including a first valve plate having a valve opening and a second valve plate connected to the first valve plate via a first bellows, in which the rigidity and the like of the valve plates, a valve rod, and ... | 05/13/2003 |
| 6561484 | Gate valve A gate valve according to the present invention including a first valve plate having a valve opening, a second valve plate connected to the first valve plate via first bellows, and an actuator provided between the first valve plate and the second valve pl... | 05/13/2003 |
| 6056267 | Isolation valve with extended seal life A gate valve assembly having a primary and secondary seating surface for preventing process fluids from contacting the seals of the valve is provided. Additionally, a purge gas inlet can be disposed in the valve body to prevent process gases from contacti... | 05/02/2000 |
| 5435520 | Backseat assembly for an expanding gate valve A backseat assembly for an expanding gate valve includes a sealing member slidingly disposed about the stem and a biasing member biasing the sealing member away from the gate. Upon the gate and segment traveling to the open position of the valve, the segm... | 07/25/1995 |
| 5232199 | Sliding gate line blind A sliding gate line blind for preventing fluids from traveling downstream from the blind including a body for connection to a pipeline, the body being open to the atmosphere and having an inner portion and an outer portion, the body having an entrance pas... | 08/03/1993 |
| 5211373 | Gate valve having expanding gate and floating seats An expanding gate valve having replaceable valve seats that are capable of longer operating life than conventional valve seats. The valve seats of the present invention have sealing faces that are case hardened to a hardness of about Rockwell 60 C and are... | 05/18/1993 |
| 5195722 | Fool proof slide gate valve A fool proof slide gate valve wherein a slide gate valve body houses a gate which is constructed to encompass a wedge and its related components whereby when an external force is transmitted to said wedge, the gate effectively opens flow or closes flow to... | 03/23/1993 |
| 5116022 | Stop valve for pipe bridge A double disk wedge valve the valve disk of which is movable by an actuating rod and is provided with a pipe bridge which includes two sealing rings connected by way of a compensator, said sealing rings in the open position of the valve being urged by ela... | 05/26/1992 |
| 4971098 | Valve and improved seat seal therefor An improved seal ring for sealing across the annular space between the exterior of a seat ring and the inner surface of a counterbore recess surrounding the entry of either the inlet or outlet into the valve chamber within the valve body, the seal ring in... | 11/20/1990 |
| 4585207 | Expanding gate valve with pneumatic actuator A piston type pneumatic powered actuator (9) for operating a valve (10) of the expanding gate type wherein velocity of the piston-stem-gate drive train is maintained substantially constant in the latter stage of the actuator stroke. The actuator (9) inclu... | 04/29/1986 |
| 4568058 | Dual stage hydraulic actuator for expanding gate valve A dual stage hydraulic actuator (9) for actuation of an expanding gate valve (10). The actuator is mountable to the valve housing and comprises a housing 40 which defines a piston chamber 41 and a primary piston (61) slidably received therein. An actuator... | 02/04/1986 |
| 4543981 | Sliding gate valves In order to resist alteration of the spring forces utilized for applying seal pressure between the valve bodies in sliding gate valves for molten metal pouring, particularly those of the manually operated type, the valve support plate and the mounting pla... | 10/01/1985 |
| 4531710 | Expanding gate valve There is disclosed an expanding gate valve having seats which are press-fitted into annular recesses in the valve body on opposite sides of the gate, each seat including a ring having at least one annular rib on its outer end which is of a harder material... | 07/30/1985 |
| 4530488 | Through conduit gate valve with double expanding gate assembly An improved through conduit gate valve having a double expanding gate assembly with floating seats. The gate assembly carries at its edges flat guide strips which are slightly thicker than the collapsed thickness of the gate. These strips engage the seals... | 07/23/1985 |
| 4515174 | Gate valve with internal pressure relief means A valve (10) having an expansible gate assemblage of ported juxtaposed gate and segment members (18, 19) which are movable into sealing engagement with upstream and downstream valve seats (28) about the flow passage (12, 14) in the open and closed conditi... | 05/07/1985 |
| 4486003 | Gate valve structure An expanding gate valve with a valve seat structure which comprises a pair of "floating" seat rings (60) loosely received in annular seat pockets (52) surrounding the flow passage through the valve and each having an axial dimension which exceeds the dept... | 12/04/1984 |
| 4401292 | Valve seat structure A seat assembly for an expanding gate valve comprising an outer loose fitting main ring (31) with a resilient face seal (41) for sealing against an expanding gate assembly which is mounted in a valve chamber (11) and an inner auxiliary ring (44) fitting l... | 08/30/1983 |
| 4376524 | Low stress stem connection structure for a non-rising stem type gate valve A low stress stem connection structure (77) for connecting the rotatable stem (43) and the gate member (33) of a non-rising stem type gate valve (1). The stem (43) has an externally threaded end section (47) and the gate member (33) has an externally thre... | 03/15/1983 |
| 4372531 | Ceramic gate valve and components therefor The present invention comprises an improved ceramic gate valve having within the valve housing a ceramic valve gate, which is surrounded by a peripherally disposed compression band for providing strength thereto, and which is engaged by a pair of ceramic ... | 02/08/1983 |
| 4359203 | Valve assembly A valve structure in which a valve member moves into and out of contact with first and second valve seating areas, the valve member contacting the seating areas with different forces. The movable valve member is comprised of block members coupled together... | 11/16/1982 |
| 4341369 | Expanding gate valve assembly A gate valve (10) has an expanding gate assembly (34) for reciprocal movement transversely of the flow passage (16, 18). The expanding gate assembly (34) includes a gate element (68) and complementary segment (70) which expand away from each other when th... | 07/27/1982 |
| 4334666 | Expanding gate valve with position responsive interlock A gate valve (10) has an expanding gate assembly (34) mounted in the valve chamber (14) for movement between open and closed positions. The gate assembly (34) includes a gate (44) connected to a valve stem (28) and a segment (52) is carried by the gate (4... | 06/15/1982 |
| 4320890 | Valve seat structure A valve seat structure for an expanding type gate valve (20). A valve seat (64) is received in each annular seat recess (62) formed around the upstream and downstream flow passages (24, 26) and opening to the valve chamber (22) wherein a gate assembly (32... | 03/23/1982 |
| 4313458 | Restricted movement valve seats for an expanding gate valve In an expanding gate valve, tangential pins (70) are received loosely in peripheral grooves (62) of floating valve seats (26) to prevent the seats from moving inwardly far enough to drag against a gate mechanism (32) which is collapsed for movement betwee... | 02/02/1982 |
| 4291862 | Expanding gate valve A gate valve structure has an expanding valve assembly mounted with the valve chamber comprising a gate (32) and segment (34) which may be laterally expanded. The gate and segment have a plurality of coacting interfitting saw-type teeth (46,48) which defi... | 09/29/1981 |
| 4279404 | Guide arrangement for expanding gate valves The gate assembly (24) of an expanding gate valve has projecting pins (74, 76, 78) which engage guide surfaces (54, 66) of guide rails (52, 64) in order to maintain the gate assembly in a collapsed condition between its open and closed positions. At the f... | 07/21/1981 |
| 4246928 | Restricted movement valve seats for an expanding gate valve In an expanding gate valve, tangential pins (70) are received loosely in peripheral grooves (62) of floating valve seats (26) to prevent the seats from moving inwardly far enough to drag against a gate mechanism (32) which is collapsed for movement betwee... | 01/27/1981 |
| 4240460 | Means for limiting floating movement of gate valve seats A two-piece retainer ring fits within opposed grooves (80,82) in a gate valve seat (64) and the adjacent valve body (12). The opposed grooves are of a width greater than the width of the two ring segments (84) comprising the two-piece ring and limit the m... | 12/23/1980 |
| 4240608 | Controlled float seat arrangement for expanding gate valves An expanding gate valve having a pair of seat spacers (70) which hold apart a pair of floating valve seats (32) to prevent them from binding against a gate mechanism (40) which is collapsed for movement between open and closed positions. The spacers (70) ... | 12/23/1980 |
| 4236692 | Controlled floating seat for gate valves A controlled or limited floating seat for an expanding type gate valve. The seat is received in a shrink fit in a groove formed around the flow passage of the valve adjacent the valve chamber. The seat is able to move in the groove toward the valve chambe... | 12/02/1980 |
| 4208035 | Metal gate valve seat having a flexible front lip face seal A gate valve has annular metal seats mounted in seat pockets around the inlet and outlet passageways at the valve chamber. Each of the seat members has a front face which includes an outer seal surface around the outer perimeter of the seat and a flexible... | 06/17/1980 |
| 4193577 | Expanding gate valve with axially flexed spring plate An improved spring plate (52) for insuring timely cooperation between the gate member (36) and segment member (38) of a linearly reciprocating gate assembly (34) which is expansible to seal the opposed seats of a gate valve. The two members have two pairs... | 03/18/1980 |
| 4189127 | Expanding gate valve There is disclosed a valve having an expanded gate comprising a pair of ported segments each having "V"-shaped, oppositely facing inner surfaces which are yieldably urged into conformity with one another by a pair of leaf springs. Each leaf spring is disp... | 02/19/1980 |
| 4188016 | Spacer carriers for floating seats in gate valves A gate valve structure having a pair of opposed spacer carriers (72,74) fitting within the valve chamber in abutting relation to each other and spacing the floating upstream and downstream seats (60, 62) from each other a predetermined minimum distance. E... | 02/12/1980 |
| 4188014 | Gate valve with position responsive interlock An improved gate valve of the expanding type wherein a gate and segment assembly having cooperative wedge surfaces are moved linearly between a pair of valve seats to block the flow therebetween in one position and open the flow in another, the fluid flow... | 02/12/1980 |
| 4179099 | Expanding gate valve An expanding gate valve according to the present invention includes a gate system incorporating a pair of segments, one segment being formed to define opening cam surface means and the other segment being formed to define closed cam surface means. Spreade... | 12/18/1979 |
| 4179098 | Spacer plates for gate valve seat assemblies A gate valve having a gate assembly of the expanding type employing a gate element (34) and segment (36) with adjacent wedge surfaces to expand the gate mechanism in both open and closed positons. Opposed floating seat skirts (68) having integral seat ass... | 12/18/1979 |
