Class 92/69R - Oppositely movable walls of common chamber (50) (75)

Subclass of Class 92 - Expansible chamber devices
Definition: Apparatus in which the working members form opposite walls
No. of patents: 31
Last issue date: 09/09/2008

Number	Title	Issue Date
7421991	Brake-actuated vane-type camshaft phaser A vane-type camshaft phaser includes a vaned camshaft rotor disposed within a lobed stator, defining phase advance and retard chambers filled with oil. The height of the rotor is less than the height of the stator, providing space for a vaned brake rotor alongside t...	09/09/2008
7350774	Long travel, high force combination spring A long travel, varying spring rate combination spring includes two differing rate springs connected end-to-end in such a way that the lower rate spring is compressed until positive engagement of a plunger with an intermediate flange member occurs with the higher rat...	04/01/2008
7270320	Antivibration element An antivibration element (1) is especially for a portable handheld work apparatus such as a motor-driven chain saw or a brushcutter. The antivibration element includes a coil spring (2) and at least one guide. An end section (7, 8) of the coil s...	09/18/2007
7108490	Reciprocating compressor having anti-collision means A reciprocating compressor includes a frame unit disposed in a container; a reciprocating motor disposed in the frame unit; a cylinder disposed in the frame unit; a piston performing a linear reciprocating motion; a valve unit installed at the front of the frame uni...	09/19/2006
6997150	CTA phaser with proportional oil pressure for actuation at engine condition with low cam torsionals A variable camshaft timing phaser for an internal combustion engine having at least one camshaft comprising a plurality of vanes in chambers defined by a housing and a spool valve. The vanes define an advance and retard chamber. At least one of the vanes is cam torq...	02/14/2006
6976831	Transmissionless variable output pumping unit A transmissionless variable output pumping unit comprising a multiple crankshaft pump driven by a prime mover. The apparatus includes an adjustment mechanism for adjusting a phase angle between first and second crankshafts. Plungers in the pump are disposed in cylin...	12/20/2005
6016737	Transmission The present invention is for a means for transmission of force whereby linear movement is transferred into rotating movement or reverse. The invention is primarily intended to be used by combustion engines. The invention is for a means to transmit force b...	01/25/2000
6003432	Actuator including a jack An actuator including a jack having first and second pistons engaging a control rod, particularly for rotating the shaft of a fraction-of-a-turn plumbing device. The actuator can also include energy storage cartridges and/or damping members placed between...	12/21/1999
5950427	Fail-safe electric hydraulic actuator An electro-hydraulic valve actuator comprising an actuator casing; a piston/rack means in the casing having walls reciprocating linearly to effect linear movements, the reciprocating walls defining a center chamber therebetween and two outside chambers in...	09/14/1999
5809864	Opposed piston engines An opposed piston engine (10) comprising upper (12) and lower (14) cylinders and opposed pairs of pistons (16, 18) slidable therein and interconnected by rocker pivots (24, 26). A crankshaft (56) coupled to the rocker pivots (24, 26) constrains the moveme...	09/22/1998
4986394	Brake actuator A brake actuator has a body containing a pair of brake-applying members which may be actuated hydraulically to separate the friction elements of a brake into engagement with a rotatable braking surface. The members are interconnected by a mechanism in the...	01/22/1991
4970944	Rotary actuator An improved fluid supplying and exhausting arrangement for fluid-powered rotary motion actuating devices of the dual piston rack-and-pinion type. A first conduit arrangement includes a central opening through an axial end wall of the actuator housing and ...	11/20/1990
4905574	Single-acting rotary pneumatic actuator, including at least a precompressed spring assembly The rotary actuator includes at least a precompressed spring assembly comprising a compression coil spring the ends of which are engaged by flanged cups adapted to limit the spring extension and carried slidably on a pin provided, at each end, with a circ...	03/06/1990
4756237	Device for converting energy of fluid medium into mechanical work of working member According to the invention, the device comprises a housing (1), two chambers (2, 3) interconnected through a pipeline (4) and disposed in the housing opposite to each other. Each chamber (2 or 3) has a piston made in the form of an elastic sleeve (10 and ...	07/12/1988
4651627	Fluid-pressure operated actuators A fluid-pressure operated actuator comprises a housing, at least one piston reciprocable in the housing, a rotatable output shaft having a portion thereof within the housing, means operatively connecting the piston and the output shaft, and stop means mou...	03/24/1987
4647003	Remote control actuating device for a valve An actuating device operated by a pressure medium, such as compressed air, acting within a housing, can be secured to a valve by a mounting member attached to the valve. The actuating device includes a first piston guided in a cylinder part positioned on ...	03/03/1987
4494442	Valve accentuation mechanism for opposed inverted V engine A valving mechanism for use in machines such as internal combustion engines, steam engines, gas compression engines or air compressors. The mechanism employs a piston valve reciprocating within a cylindrical chamber under the direct action of cam surfaces...	01/22/1985
4463662	Compact rotary power cylinder A compact rotary power cylinder including a pair of pistons fitted in a cylinder housing, separating the housing into a first chamber and a pair of second chambers, so as to be reciprocally movable when a pressure impact is supplied selectively to the fir...	08/07/1984
4354424	Pneumatic operating device A pneumatic operating device, e.g. for controlling valves, includes a cylinder (2) in which a piston (12) is movable. The piston has an axially extending rack part (11) having teeth which engage with teeth on an operating element (10) arranged in the cyli...	10/19/1982
4272999	Fluid pressure operated actuator A piston-and-cylinder type actuator, for use particularly in steplessly-variable-ratio transmission units of the toroidal race rolling friction type. In such units the actuator may serve to thrust the input and output members and their intermediate roller...	06/16/1981
4260128	Valve actuators and combined valves and actuators A valve actuator has at least one piston in a cylindrical chamber that has a segmental skirt provided with transverse teeth on its chordal face meshing with lengthwise teeth on the hub of a rotor extending diametrically through the chamber with one rotor ...	04/07/1981
4221155	Vibration-free hydraulic power system A vibration-free hydraulic power system having an opposing pair of pistons adapted to be moved in unison with the same stroke and equal force, but in opposite directions, one of the pistons being operatively connected to an external mass to be moved, the ...	09/09/1980
4203351	Fluid motor actuator for rotating a shaft back and forth Fluid motor actuator having two pistons reversely movable in a common cylinder, the pistons each carrying at least three extensions on their proximal sides, one of which being provided with a rack camming with one common spur gear fastened on a transverse...	05/20/1980
4167897	Rotary actuators A piston rack rotary actuator, devoid of guiding tubes or rods along which the pistons reciprocate, is provided with guide bearings which eliminate or at least reduce the incidence of the separating forces which otherwise act on the racks (particularly wh...	09/18/1979
4125076	Positioning device for carriages movable along a guide A positioning device for transferring a plurality of carriages or the like into desired positions along a guide, and for holding the carriages in said positions, said device having at least one transfer bar extending along the guide and being movable reci...	11/14/1978
4094227	Fluid motor An opposed piston fluid motor having a pair of angularly related cylinders rigidly joined at adjacent ends in a common plane is mounted above a base with the common plane normal to the base and the cylinders inclined downwardly from the common plane towar...	06/13/1978
4092829	Balanced compressor A compressor for a cryogenic cooler such as the Stirling cycle type or eqalent related types is provided in which all the forces and moments generated by its moving parts are balanced to eliminate noise and vibration....	06/06/1978
4087074	Spring return valve actuator A fluid actuator for 90° rotating valves having a return spring coupled to an independent fluid actuated piston to assist in spring compression on the forward stroke....	05/02/1978
3987767	Expansible chamber device An internal pressure engine comprises at least three like members called hedrons movable between two parallel end plates. Each of the hedrons has opposite end faces engaging the end plates, an inner face extending between the end faces and a sealing face ...	10/26/1976
3982725	Valve actuator A low profile fluid powered actuator particularly for valves of the type in which the valve element is rotated to open and close the flow passageway through the valve body, the actuator having a novel internal porting system, means for direct attachment o...	09/28/1976
3971296	Pneumatic actuators A pneumatic actuator having a double-acting piston separating two pressure chambers, spring means to urge the piston in one direction; and valve means adapted to admit compressed air to one of the chambers and thus to load the spring means, then to transf...	07/27/1976

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Class 92/69R - Oppositely movable walls of common chamber (50) (75)