Class 92/130B - Bias other than coil spring

Subclass of Class 92 - Expansible chamber devices
No. of patents: 44
Last issue date: 07/24/2007

Number	Title	Issue Date
7247090	System and method for inhibiting moisture and mold in an outer wall of a structure A structure comprises at least one outer wall having an internal wall section and an outer wall section with an air flow passage therebetween. A circulation system circulates air through the flow passage to inhibit moisture accumulation and mold growth. A sensing sy...	07/24/2007
7059578	Diaphragm and hydraulically-operated valve using same The present invention relates to fluid control valves. The invention provides an improved diaphragm useful for a large hydraulically-operated valve or pressure regulating valve of the type used in pipelines to transport water, oil, gas, acids, alkalis and other flui...	06/13/2006
6959797	Piston-cylinder assembly with braking device In a piston-cylinder assembly comprising a cylinder in which a piston rod is installed with freedom of axial movement and which is filled with a blocking medium, a braking device becomes active when the piston-cylinder assembly moves faster than a defined speed and ...	11/01/2005
6783335	Linear compressor having an anti-collision device A linear compressor with an anti-collision device, which prevents a piston of the compressor from being brought into collision with a cylinder head and/or a suction valve even when the piston moves past an upper dead center position during an operation of the compre...	08/31/2004
6725975	Positioning rotary actuators In order to position a rotary actuator, a positioning device is coupled to the actuator. The positioning device has a coupling shaft and springs which respectively surround top and bottom portions of the shaft and are coupled thereto by respective coupling rings. Th...	04/27/2004
6705206	Fluid actuator rotor for hinged vehicle safety devices A fluid actuator attaches a hinged safety device to a vehicle and pivots the hinged safety device between retracted and extended positions. The housing of the actuator has a base and a removable cover. A sub-assembly is attached to the base. The subassembly includes...	03/16/2004
6675944	Return apparatus for a clutch piston of an automatic transmission In order to minimize an effect of centrifugal force on a release operation of a clutch piston, this invention provides a return apparatus including a spring support rotating at a same speed as the clutch piston, and a return spring abutted at an end again...	01/13/2004
6435075	Fluid actuator for hinged vehicle safety devices A fluid actuator attaches a hinged safety device to a vehicle and pivots the hinged safety device between retracted and extended positions. The housing of the actuator has a base and a removable cover. A sub-assembly is attached to the base. The subassemb...	08/20/2002
6413057	Plurality of outer resonance springs for a linear compressor A linear compressor including: a cover fixed at a rear side of a frame; a cylinder fixedly installed in a horizontal direction at the center of inside of the frame; an inner stator assembly fixedly installed at the frame in a state that its inner circumfe...	07/02/2002
6308611	Variable stroke motor and valve A fluid valve system is provided for a variable stroke motor. The valve has a housing forming a cylinder, a first fluid input into the cylinder, a first fluid output out of the cylinder, a second fluid input into the cylinder, and a second fluid output ou...	10/30/2001
6273434	Capless quick-grip cylinder The present invention concerns a method for manufacture and assembly as well as a capless quick-grip cylinder manufactured by this method with a feed nipple for clamping a carrier plate, also called a pallet, which on a machine tool serves to fix work pie...	08/14/2001
6146114	Fluid pump and expandable energy storage device A fluid pump and expandable energy storage device includes a substantially igid circular band, a substantially rigid central hub, a membrane fixed to the band and to the hub, the membrane being enlargeable by a fluid introduced into the device, and a plura...	11/14/2000
5992252	Constant force side button engagement mechanism The inventive button pushing mechanism allows pneumatic force to be translated actuate a button on a cellular telephone that is being tested by an automatic testing machine. The mechanism includes an actuating shaft that transmits pneumatic force to a spu...	11/30/1999
5964333	Friction clutch and a slave cylinder for the operation of a friction clutch A slave cylinder for the operation of a friction clutch, especially in motor vehicles, with a housing, an inner portion, an annular or cylindrical piston which annular piston is positioned between the housing and the inner portion, a clutch release sleeve...	10/12/1999
5915930	Bellows operated oscillating pump An oscillating pump (10) includes a housing (11) which carries the components thereof. These components include an electromagnetic coil (24) surrounding an armature (23) carried by an impeller (12) which is positioned longitudinally between an inlet area ...	06/29/1999
5797309	Steering valve In order to economize the manufacture and assembly as well as reduce the expenditure of components and functionally improve a steering valve for supplying an actuator with hydraulic pressure, comprising an input shaft 2, an output shaft 3, a torsion rod 4...	08/25/1998
5784948	Positive displacement pump having levitating magnetic piston spring circuit A positive displacement pump including a plurality of pistons reciprocally driven in respective cylinders by a swashplate assembly to expel fluid during the pressure stroke of the piston from a chamber in communication with each piston. Oppositely dispose...	07/28/1998
5518377	Vertical metering pump having piston biasing elastomeric gasket A miniature metering pump of the type possessing a body provided with an inlet opening out into a metering chamber, associated with an inlet valve having a valve member, and with a piston having a plunger provided with an axial nozzle and flared at its bo...	05/21/1996
5335763	Spring retainer for clutch piston A spring retainer for a clutch piston has a cylindrical through portion engaged with the shank of a clutch drum and abutting a snap ring at one end. A dish bearing portion is connected to a second end of the through portion and extends in a frusto-conical...	08/09/1994
5307730	Piston return spring system with self-adjusting clearance feature A return spring (40,60) operable with piston means (30) for use in fluid operated friction torque transmission devices (11) including relatively rotatable members (12,13) carrying a plurality of torque plates (18,22), one of the members providing a fluid ...	05/03/1994
5125234	Hydraulic cylinder apparatus of the type actuated by booster In a hydraulic cylinder apparatus of a type actuated by a booster, a plunger chamber (39) of a booster (32) is connected in communication with an extension cylinder chamber (35) of a hydraulic cylinder (30). An annular oil make-up chamber (48) is disposed...	06/30/1992
5046404	Magnetic disk brake retractor A magnetic disk brake retractor is described as having a magnet mounted in the housing of a hydraulic disk brake and adjustable in position relative to a brake piston. In one modification described, the magnet is in the form of permanent magnets. The brak...	09/10/1991
4967785	Valve actuator A valve actuator is disclosed which is encased in a housing with a bonnet mounted at one end and an end cap on the other end. Inside, an actuator shaft is slidably mounted through a bore on a guide connected to the bonnet. A piston is slidably mounted wit...	11/06/1990
4925154	Gate valve with supplemental actuator An improved gate valve having a body with a chamber and an inlet and an outlet extending therethrough into said chamber, a gate mounted for reciprocation in said chamber between open and closed positions, a pressure responsive actuator having a housing, a...	05/15/1990
4871143	Gate valve with supplemental actuator An improved gate valve having a body with a chamber and an inlet and an outlet extending therethrough into said chamber, a gate mounted for reciprocation in said chamber between open and closed positions, a pressure responsive actuator having a housing, a...	10/03/1989
4830737	Apparatus and method for controlling the flow of foam at low flow rates Apparatus for controlling the flow of a foam uses a bellow enclosed in a housing. The bellows is filled with foam under pressure from a foam generator and expands a preselected amount at which point the flow of foam into the bellows is interrupted. Simult...	05/16/1989
4762475	Thrust piston pump for the discharge of media A thrust piston pump for the delivery of media has a spring constructed in one piece with the piston rod of a piston unit and located in the pump chamber, which is guided on a sloping surface formed by an internal cone. The piston rod is constructed in su...	08/09/1988
4593607	Spring-piston combination for manually operated pump A manually operated actuator for a pump employs a vertical hollow chamber. A piston is vertically slidable in the chamber between a bottom position at which no pumping action can take place and a top position at which pumping action can occur. The piston ...	06/10/1986
4552056	Manual release and automatic reset arrangement for spring-applied/air-released brake An automatic reset arrangement for a manual release mechanism in a spring-applied, air-released brake comprising a sleeve member having axially projecting fingers that slide axially within the bore of the spring piston push rod. The ends of the projecting...	11/12/1985
4523516	Actuator having Belleville washer configuration operating in concert with a piston cylinder member A pressure actuator is provided for a valve having a housing and an actuating stem, wherein an annular housing is attachable at one end of the valve housing and a cylindrical piston element is concentrically fixedly mounted to the other end of the annular...	06/18/1985
4502847	Exhaust gas operated vacuum pump assembly A vacuum pump assembly which is driven by pulsating exhaust gases emanating from an internal combustion engine is disclosed. The pump assembly includes a staged pump means for pumping air from a vacuum source and having a reciprocable pumping member, an a...	03/05/1985
4498318	Apparatus for supplying foam to a consumer Apparatus for supplying foam from the outlet of a continuously operated foam generator to a consumer which applies the liquid fraction of the foam to a substrate has a conduit which receives foam from the outlet and contains a storing device serving to ta...	02/12/1985
4487110	Clamping element A clamping element comprises a single-acting cylinder and a piston with strong spring return which can be cancelled out by introduction of a pressure medium into the pressure chamber of the cylinder. The spring return is brought about, at least mainly, by...	12/11/1984
4475335	Free piston heat engines A Stirling cycle heat engine, specially suitable for use in environments subject to acceleration or large temperature variations, including a free and reciprocating displacer piston fitted with a non-contact device which acts with increasing force to oppo...	10/09/1984
4445424	Actuator having Belleville washer configuration operating in concert with a piston cylinder member A pressure actuator is provided for a valve having a housing and an actuating stem, wherein an annular housing is attachable at one end of the valve housing and a cylindrical piston element is concentrically fixedly mounted to the other end of the annular...	05/01/1984
4442757	Fluid pressure actuator having bias element immersed in non-corrosive environment An improved valve actuator is provided for employment in environments such as subterranean wells where highly corrosive gases and fluids are contained in the well fluid which is normally pressurized and employed to operate the actuator. The bias element o...	04/17/1984
4336746	Self retracting piston applicable for disk brake assemblies Actuating piston of disk brake is provided with self-retracting 3-element control unit carried, typically, in surrounding annular piston recess with one element in frictional or tensioned registration with wall of piston chamber. Elements are (a) radially...	06/29/1982
4333391	Adjustable spring-return actuator A pressure-fluid operated actuator with a vane pivoting in a casing has a biasing spring in a two-part housing attached at one end to one part of the housing and at the other end to the vane. To adjust the spring bias said one housing part is rotatable by...	06/08/1982
4308788	Fluid pressure responsive apparatus A differential pressure unit having overrange valves loosely mounted on a valve stem connected between the ends of a respective pair of movable bellows ends. A pair of spiral range springs bias both valves toward open positions. The valves include annular...	01/05/1982
4301948	Dispenser for paste-like products with a manually actuatable piston This invention relates to a dispenser for paste-like products of the type having a container containing a product and closed at one end by a slidable piston in sealing engagement with the inner wall surface thereof, the other end being provided with a hea...	11/24/1981

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Class 92/130B - Bias other than coil spring