Class 251/302 - Bifaced

Subclass of Class 251 - Valves and valve actuation
Definition: Devices wherein the valve head has two seating faces which
No. of patents: 31
Last issue date: 10/04/2011

Number	Title	Issue Date
8028972	Gate valve for vacuum apparatus Even when a gate valve for a vacuum apparatus used in a vapor deposition apparatus is in an open position, reliability of keeping a vapor deposition chamber vacuum can be improved by protecting an inner wall surface of a valve casing and a sealing member of a valve ...	10/04/2011
7270311	Pendulum gate valve A pendulum gate valve includes a housing defining a valve chamber, the valve housing having a vacuum-chamber opening in a front wall and an access opening in a rear wall aligned with the vacuum-chamber opening and defining a through-hole extending from one side of t...	09/18/2007
7146677	Energy saving vacuum system for particle, mist, and fume collection An improved energy-efficient vacuum system for machine shop dust, particulate matter, and the like. Blast gates, including large-diameter blast gates, control the flow of vacuum generated by a dust collector to individual machines that may or may not accommodate vac...	12/12/2006
7032882	Valve assembly having novel flow characteristics A valve assembly including a housing having a flow channel and an annular surface surrounding the flow channel, a slide plate movable to a closed position, and a seal ring positioned between the annular surface and the slide plate. The seal ring includes a first and...	04/25/2006
7000899	Shutoff device A shutoff device for shutting off liquids or gases comprises a device housing (10) and a device (13) movable in said housing (10), the device (13) being provided with an opening (14). For sealing purposes, annular sealing bodies (	02/21/2006
6974122	Gates for throttle valves Gate for throttle valves composed of a central supporting portion constituted by a thermoplastic material and an edge portion constituted by a thermoplastic elastomeric material belonging to the same chemical family as the thermoplastic material; the gate is produce...	12/13/2005
6969044	Apparatus for controlling a fluid discharge An apparatus for controlling a fluid discharge through an opening in a conduit includes a conduit section, conduit inlet, conduit interior, conduit exterior, and a conduit outlet or opening having a continuously curved perimeter surface with oppositely disposed conc...	11/29/2005
6966538	Gate valve A gate valve has a valve rod equipped with a valve plate having a pair of valve plate surfaces, wherein the valve rod is tilted by an actuator to thereby effect highly reliable valve opening/closing operation with a simple construction. In the gate valve, the valve ...	11/22/2005
6691981	Gate valve A gate valve (2) comprising valve body (4, 6) and a gate element (8) movable to selectively interrupt a flow passage through the valve body (4, 6). The gate element (8) is supported for rotation in a correspondingly shaped recess (14) in the valve body (4...	02/17/2004
6601824	Single shaft, dual cradle vacuum slot valve A single slot valve shaft is in a vacuum body between adjacent vacuum chambers, such as a process module and a transport module. Separate valves are provided on the single shaft actuator for each of two valve body slots, each body slot being closed or ope...	08/05/2003
6390448	Single shaft dual cradle vacuum slot valve A single slot valve shaft is in a vacuum body between adjacent vacuum chambers, such as a process module and a transport module. Separate valves are provided on the single shaft actuator for each of two valve body slots, each body slot being closed or ope...	05/21/2002
6325356	Long life rotary gate valve for aircraft vacuum toilet system A light weight gate valve and method for a aircraft vacuum toilet system. The valve resists jamming due to scale buildup, thereby reducing maintenance costs associated with repair or cleaning. The gate valve is intended for mounting between two portions o...	12/04/2001
6260490	Burner isolation valve for pulverized fuel systems A burner isolation valve or gate for use in the coal-delivery pipes of coal-fired power plants. Safety regulations often require that two valves be placed in the coal delivery line between a combustion chamber and an exhauster or pulverizer type deliver s...	07/17/2001
6032921	Engine shutdown valve An engine shutdown valve comprises a housing and a gate movable within a housing between a first position where the air flow through the shutdown valve is substantially unrestricted to a second position where the opening is restricted thereby stopping air...	03/07/2000
5899438	Gate valve having a swingable-slidable valve plate A gate valve has a manual actuator that includes a crank having a direct pivotal connection with a slidable valve plate. The valve plate has a teardrop configuration that enables the valve plate to swing around the pivot connection as the plate slides alo...	05/04/1999
5836336	Cut-off diaphragm gate valve A cut-off diaphragm gate valve has two members (1) of the shape of a quadrangle located opposite to each other as in mirror reflection. Passage openings (4) are disposed in the four corners of each of the members (1). Control screws (5) furnished with nut...	11/17/1998
5797423	Device for cutting off a flow in a conduit for fluide A device for cutting off the flow in a conduit for fluids, consisting of a sluice (2), transversely arranged in a conventional conduit for fluids (1) between two flanges (3), one or two flanges (3) being fitted with a tab (6), a hole and axle (7) around w...	08/25/1998
5618027	Gate valve A valve comprising a gate closure member which is actuated by a stem that is operatively connected with the valve operator handle at the upper end of the stem and the lower end of the stem connected to a toothed pinion engaging an arcuate toothed rack on ...	04/08/1997
5464310	Conveyor conduit for bulk material to be pneumatically conveyed In a conveyor conduit comprising at least one valve having a movable closure body, for loose material which is to be pneumatically conveyed, the closure body of the valve is permeable to the conveying air in the closure position of the valve in which it b...	11/07/1995
5203536	Compact engine shutdown valve An engine shutdown valve comprises a housing and a gate movable within a housing between a first position where the air flow through the shutdown valve is substantially unrestricted to a second position where the opening is restricted thereby stopping air...	04/20/1993
5088422	Rotary isolation door A rotary isolation door for use in a conduit extending between an auger feeder and an incinerator which opens to allow the auger feeder to convey material to the incinerator and closes to prevent burn-back of material in the conduit from the incinerator. ...	02/18/1992
4679768	Valve A valve for connection in a pipeline or duct for the conveyance of a fluent medium includes a valve plate which is movable laterally relative to the duct between respective open and closed positions, with resilient sealing means provided on or in associat...	07/14/1987
4587989	Turn disc slide valve A turn disc valve (10) includes a rigid, sealed, valve body having first and second, parallel, generally coextensive side-wall rigid plates (20 and 22) with a spacing wall (24) sealed between them to define a flat cavity therebetween. A relatively-resilie...	05/13/1986
4585023	Packing-resistant valve A packing resistant valve has a gate rotatably mounted within an angled valve body and an inlet face of the gate defines a concave recess for inducing eddy currents in fluid flow impinging thereon. The eddy currents direct fluid flow away from the valve b...	04/29/1986
4546954	Engine air cut-off valve The valve comprises a two-piece housing consisting of a body and a flat cover. The body is milled out to define a working chamber. A port extends through the body wall to communicate with the chamber; a second port extends through the cover wall. The two ...	10/15/1985
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
4537386	Engine shutdown valve An engine shutdown valve comprises a substantially circular gate valve movable about an axis between open and closed positions within a valve housing mounted in an engine induction manifold. A gate lever connects the gate valve with the axis and a movemen...	08/27/1985
4432387	Rotating disc gate valve A rotating disc gate valve for controlling fluid flow in a flow line comprising a valve body having a flow passageway and a cavity transverse to the flow passageway to receive a flow control assembly. The flow control assembly includes first and second va...	02/21/1984
4381100	Valve and valving apparatus A gate valve having an expandable valve closure apparatus which is capable of expanding to seal two oppositely located parts in its valve housing. The expandable valve closure apparatus if pivotally mounted for movement on the end of a swing arm member to...	04/26/1983
4328947	Pendulum gate valve A pendulum gate valve with a pressure tight housing and inlet and outlet openings arranged on opposite sides of the housing. The drive rod for the pendulum frame is guided throughout its total path by a joint connected to the pendulum frame which can swiv...	05/11/1982
4063556	Vacuum curettage device A vacuum device for performing medical procedures such as a curettage, or the like. The device includes basically an evacuated vessel, a cannula or some other form of medical implement, and a valve arrangement for selectively applying the vacuum to the ca...	12/20/1977

PatentStorm

Quotables

PatentStorm News

Class 251/302 - Bifaced