Class 251/204 - Moves with respect to head and seat

Subclass of Class 251 - Valves and valve actuation
Definition: Subject matter wherein the wedge or cam moves with respect
No. of patents: 39
Last issue date: 10/26/2010

Number	Title	Issue Date
7819384	Gate valve device A movable member is fitted in the middle in the vertical direction of a valve body core fitting that forms a gate valve body, and the movable member presses an elastic seal member from the inside of the seal member toward a tube inner wall surface located in a direc...	10/26/2010
7735804	Sealing valve A sealing valve is disclosed. The valve comprises a valve seat, a power element and an elevation section. The valve seat is provided with through hole from front to rear, and the upper end of the valve seat is connected to a guiding body having a guiding slot and a ...	06/15/2010
7341237	Valve mechanism for a vacuum valve A valve mechanism having at least one movable valve member for sealing of a valve opening in a housing. Movements of the individual movable valve members are accomplished essentially parallelly to, and perpendicularly to, the seat surface of the valve during the ope...	03/11/2008
7134642	Vacuum gate valve The invention provides a vacuum gate valve for closing off an opening. The vacuum gate valve can have a valve plate that can be turned so that the alignment of the valve plate will adapt to a valve seat when the valve plate is pressed against the valve seat. ...	11/14/2006
7100892	Non-rubbing gate valve for semiconductor fabrication apparatus A gate valve includes a valve main body having a gate valve body attached to a valve rod; a movement operation mechanism that moves the valve rod in a direction along an axis of the rod up to a position where the gate valve body stops up a flow passage port used for...	09/05/2006
7066443	Gate valve A gate valve has a transfer chamber-side valve element and a process chamber-side valve element connected to a single shaft actuated with a single three-position air cylinder to selectively close a process chamber opening and a transfer chamber opening or fully open...	06/27/2006
7004453	Pendulum valve with a full range of position control Embodiments of the present invention provide a pendulum valve with a full range of normal position control. The pendulum valve can include a valve housing having a flow channel, and a valve body that is movable within the valve housing between a fully open position ...	02/28/2006
6474622	Gate valve A pendulum gate valve incorporates an improved power transmission device for transmitting the movement of a pivot arm of the valve to a valve disk that selectively closes the valve. The power transmission device has a supporting plate and a valve disk sup...	11/05/2002
6390449	Gate valve A gate valve is disclosed comprising an elevatable lever member connected to a piston rod, a displacement member for making up and down movements integrally with the lever member and being tiltably disposed about supporting rollers acting as a pivot point...	05/21/2002
6283445	Gate valve and cylinder apparatus A gate valve in which the structure is simplified and inexpensive, movement of a valve body is smooth and high in speed, a force of inclination moving the valve body is strong, and a sealing property of an opening portion can be improved. The gate valve h...	09/04/2001
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
5884899	Half profile gate valve A gate valve (110) includes a valve housing (112), valve plate (130), and linkage assembly (134, 136, 140). An actuator assembly (124) includes a cylinder component (150) and a piston component (170). Piston component (170) includes a piston rod (174) tha...	03/23/1999
5881998	Half profile slot valve A slot valve (10) comprising a valve housing (12) defining a valve chamber (14) and having a valve gate (34) movable to seal off a central opening (30). An actuator assembly (46) includes a piston component (70, 72) and a cylinder component (60), and a pa...	03/16/1999
5662308	Expanding gate valve assembly An expanding gate valve which includes a reciprocating gate supporting at least one floating segment supported on one side thereof with a wedging means between the gate and the segment for wedging movement of the segment transverse to the fluid flow path ...	09/02/1997
5626324	Non-sliding vacuum gate valve A non-sliding vacuum gate valve has a valve housing with a valve opening therethrough which is opened and closed by a gate valve body moved by a valve rod. The valve rod moves with linear and tilting movement so that the valve body tilts against the valve...	05/06/1997
5415376	Gate valve A gate valve wherein a valve disc is moved to a position where the valve disc is brought into contact with a valve seat and a position where the valve disc is separated from the valve seat by a driving device provided outside of a valve housing through a ...	05/16/1995
5295661	Knife valve A knife valve comprises a body defining a valve seat and a knife blade longitudinally movable by a cylindrical stem in the body for opening and closing a lateral flow passage defined therethrough. The body includes a bonnet with the stem extending thereth...	03/22/1994
5188145	Valve A valve comprising a valve body (1) provided with two openings (2, 3) each fitted with a flange (4, 5) for connection to pipework, and a moving valve member (6) for closing one of the two openings (3), said opening including a valve seat (26) whose profil...	02/23/1993
5168896	Mechanism for opening and closing valve A valve operating mechanism produces a rotating force for causing a valve body of the valve to shift relative to a valve seat thereof, so that the valve is opened and closed. A piston of the mechanism produces a rectilinear reciprocating force. A screw me...	12/08/1992
5120019	Valve Valve mechanism for high-vacuum clean environments, wherein a slot aperture is closed by a gage having a lever. Motion of the gate which covers and uncovers the slot is imparted to the gate by longitudinal movement of the lever. Motion of the gate which s...	06/09/1992
4838520	Valve for a vacuum enclosure A valve for a vacuum enclosure, the valve comprising a valve body (1) which is hollow about an axis Ɗ and which opens out to the outside via two opposite end openings (24, 25) of the valve body, thereby enabling the valve to be inserted in a pumping circ...	06/13/1989
4671487	Gate valve A gate valve has a housing provided with a passage embraced by a valve seat for a fluid medium, carrying solid particles, to flow therethrough. A gate is provided which is connected to a rod of a drive through a beam member. A hole in the beam member rece...	06/09/1987
4560141	Vacuum gate valve A vacuum gate valve includes a spreading mechanism with an actuating member extending between first and second valve plates and movable transversely of the axis of the valve, and parallelepiped spreading members disposed between the first valve plate and ...	12/24/1985
4538640	Multiposition selector valve A multiposition selector valve of the rotary type includes a valve body having a single inlet port and a plurality of outlet ports. Fluid communication between the inlet port and any one of the outlet ports is provided via a check valve assembly mounted o...	09/03/1985
4524796	Sliding-gate valve for use with abrasive materials The invention is a flow and pressure-sealing valve for use with abrasive solids. The valve embodies special features which provide for long, reliable operating lifetimes in solids-handling service. The valve includes upper and lower transversely slidable ...	06/25/1985
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
4470576	Slide valve assembly Opening and closing of a fluid flow path is controlled by a valve closure member which consists of both a sealing plate and a counter element and which is moved within its own plane to open and close the valve assembly by a crank rod. Spreading elements a...	09/11/1984
4439875	Toilet A portable toilet having an improved valve arrangement for minimizing abrasion of the holding tank inlet seal. The valve arrangement includes a valve member which moves generally normal to a sealing plane defined by the seal when the valve is opened or cl...	04/03/1984
4405113	Reciprocating expandable gate valve A valve body includes flow passageways across which a gate is movable with the gate having a central block sandwiched between outer seal blocks and a gate conduit alignable with the flow passageways of the valve body. Camming means along the edges of oppo...	09/20/1983
4378817	Slide valve assembly A slide valve for high temperature, high pressure use provides for easy access to internal components for replacement or repair, and also provides for easy and secure adjustment of the valve components from the exterior of the valve even while the valve i...	04/05/1983
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
4306828	Combined flow control and isolation valve An isolation and flow control valve in a furnace charging installation, installed in a discharge conduit of a storage hopper which may be alternately at ambient pressure for loading and furnace pressure for discharging, is characterized by a valve member ...	12/22/1981
4244557	High vacuum seal A vacuum-tight closure assembly includes a valve seat; a spreadable valve plate movable into a closed position for assuming a spreaded state in which it sealingly engages the valve seat; and a guide arrangement for a centered guiding of the valve plate du...	01/13/1981
4238111	Gate valve for use with vacuum equipment A gate valve is provided for use in conjunction with vacuum equipment in which a gate assembly is opened and closed, for example, by a pneumatic cylinder. The gate assembly is enclosed in a valve housing, and aligned openings are provided in the opposite ...	12/09/1980
4132385	Cam-lock water gate A cam-lock water gate designed to control water flow from a pond, lake, field, canal or the like. A primary body member is provided with an aperture therethrough and a short section of pipe stub integral with the main body member and opening into said ape...	01/02/1979
4052036	Sliding device for the gas-tight and air-tight closure of a container opening or of a conduit A gate value having a sealing plate carried by a moveable element which through the coaction of a series of balls presses the sealing plate into a flow preventing position....	10/04/1977
4044993	High vacuum gate valve Gate valve having a closure member mounted on a swinging arm pivotally mounted for movement transversely of the axis of the valve openings. A wedge member carried by the arm drives the closure member in a direction parallel to the axis of the openings whe...	08/30/1977
4036260	Gate valve with expandable and contractable closure member A valve comprising: a housing having an opening therethrough around which is provided a seat; a closure assembly for blocking flow through the opening and for sealing engagement with the seat; and an actuator assembly connected to the closure assembly for...	07/19/1977
3973753	High vacuum gate valve Gate valve having a closure member mounted on a swinging arm pivotally mounted for movement transversely of the axis of the valve openings. A wedge member carried by the arm drives the closure member in a direction parallel to the axis of the openings whe...	08/10/1976

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Class 251/204 - Moves with respect to head and seat