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| Number | Title | Issue Date |
| 7543797 | Valve device A valve device is provided. The valve device of the present invention includes a planetary component and two valve plates. The two valve plates are disposed on a hole portion of the planetary component opposite to each other, so as to provide a quick opening and clo... | 06/09/2009 |
| 7309057 | Guillotine valve A guillotine valve, used for example in pipelines includes a single block body incorporating sealing elements, each in the form of an annular hose section, which are made of an elastomeric material and which are hollow along their entire circumference, each providin... | 12/18/2007 |
| 7086638 | Methods and apparatus for sealing an opening of a processing chamber In one embodiment, a slit valve is provided that is adapted to seal an opening and that includes a valve housing having a first wall, a first opening formed in the first wall, a second wall and a second opening formed in the second wall. The slit valve also includes... | 08/08/2006 |
| 6997041 | Dual slide gate valve and method for using same A method and device for pressure testing a pipe line is provided wherein a fitting is inserted into the pipeline by inserting male ends of the pipeline into female ends of the fitting to define a flow path through the fitting extending along a longitudinal axis. The... | 02/14/2006 |
| 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 |
| 4817915 | Slide valve A slide valve includes a valve housing and a valve closure control device which is laterally movable within the valve housing, the valve housing including two parallel flange members which have openings therein and seating surfaces on the facing sides the... | 04/04/1989 |
| 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 |
| 4495966 | Separable high vacuum valve A valve structure permitting two vacuum chambers (16, 20) to be separted or joined without breaking the vacuum in either. The structure includes first and second valves (10, 12) positioned at openings in the vacuum chambers, a valve housing 30 surrounding... | 01/29/1985 |
| 4314579 | Gate valve A gate valve comprising a valve body having oppositely disposed inlet and outlet ports, a valve closure member reciprocally disposed within the valve body and interposed between the inlet and outlet ports to provide alternate open and closed positions for... | 02/09/1982 |
| 4290580 | Gate valve A new and improved gate valve suitable for use with high pressure, high temperature fluids such as those developed in coal gasification processes and the like which comprises a valve gate assembly including opposed outwardly facing valve discs is bodily m... | 09/22/1981 |
| 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 |
| 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 |
| 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 |
| 4165063 | Linear retractable seal valve A linear retractable seal valve having a wedge sealing-slip assembly slideably held at opposite side edges of the wedge to guide rails of the valve body and moveable from a distant first location to a second location between inlet and outlet ports of the ... | 08/21/1979 |
| 4162057 | Linear retractable seal valve A linear retractable seal valve having an inlet and outlet port and a fluid passageway therebetween with a lateral passageway perpendicular to the fluid passageway and with a wedge sealing-slip assembly slideably held at opposite side edges of the wedge t... | 07/24/1979 |
| 4145026 | Valve with self-actuating fluid seal A valve having a body with a valve seat and valve element and actuating means for moving the valve element toward and away from the valve seat with stop means in the body for stopping the movement of the valve element when the element is positioned agains... | 03/20/1979 |
