Class 92/183 - Valved

Subclass of Class 92 - Expansible chamber devices
Definition: Apparatus in which the port or passage is provided with
No. of patents: 24
Last issue date: 11/13/2007

Number	Title	Issue Date
7293496	Hydraulic linear drive of a transmission actuator A hydraulic linear drive, in particular for a hydraulic transmission actuator, has a piston/cylinder unit in which an adjusting piston is situated so that it is longitudinally displaceable in a cylinder housing and divides a cylinder space into at least two pressure...	11/13/2007
7275477	Piston assembly for air pump A piston assembly of an air pump is provided herein. The piston of the piston assembly has a through exhaust channel along the direction of the piston's back-and-forth movement. The exhaust channel is made up of two aligned exhaust holes, and a space is preserved at...	10/02/2007
7171888	Hydraulic cylinder A hydraulic cylinder comprising a cylinder, a piston which is adjustable in the cylinder, and at least one pressure connection which is disposed in the vicinity of an end position of the piston and through which a pressure fluid can be introduced into the cylinder, ...	02/06/2007
7143684	Hydraulic actuator having disc valve assembly A hydraulic actuator comprises piston that divides the interior into a piston chamber and a rod chamber and a valve disc assembly to regulate flow of hydraulic fluid between the piston chamber and the rod chamber through a passage in the piston. The disc valve assem...	12/05/2006
7100753	Torque converter clutch apply valve A replacement torque converter clutch (TCC) apply valve for regulating the application of the torque converter clutch within an automatic transmission. The present TCC apply valve includes a valve piston having an expandable seal located at the primary wear location...	09/05/2006
7096774	High pressure press, method for operating a high pressure press and use of such a press A high pressure press for treatment of substances such as food includes a floating piston in a pressure chamber, with seals. The floating piston has drainage system for collecting any pressure fluid that leaks past a seal of the floating piston. The drainage system ...	08/29/2006
6299413	Pump having a bleeding valve A pump comprises a housing having a fluid inlet and a fluid outlet. A piston is mounted for reciprocating motion in first and second directions within the housing. The housing has first and second cavities on first and second sides of the piston, respecti...	10/09/2001
6170383	Piston bypass valve A bypass valve is disclosed which relieves pressure on the end cap and rod guide of a cylinder as the piston approaches them. The bypass valve has a cylindrical body with end caps on each end, the end caps serving as stop members. The bypass valve is prov...	01/09/2001
6129005	Piston for a piston-cylinder unit A piston for a piston-cylinder unit comprises a piston body having passages which connect two spaces in a cylinder on opposing sides of the piston. The passages are covered by at least one valve disk which is centered relative to a center of the piston by...	10/10/2000
5555760	Actuator-punch assembly with forming die installation A forming die set has one or more independently operated hydraulic punch assemblies mounted directly in one of the die shoes to enable a programmed piercing pattern to be carried out at the time the workpiece is formed. Each punch assembly includes a comp...	09/17/1996
5365736	Accumulator with check stopper An accumulator for use in a hydraulic control circuit comprises a check valve for allowing a suction of air into a working fluid pressure chamber from the atmosphere. The check valve includes a valve cylinder integrally formed with a member for defining t...	11/22/1994
5318139	Reduced waiting time hydraulic drilling jar A reduce waiting time drilling jar 1 includes a mandrel 2, a housing 3 telescopingly positioned about the mandrel 2, and first and second pistons 89, 111 positioned axially between the mandrel 2 and the housing 3. The pistons 89, 111 are spaced longitudin...	06/07/1994
5096347	Spring clamp with clamped condition holding device An actuation member (B) supported by a housing (A) is actuated for clamping upwardly by means of a spring force and actuated downwardly for unclamping by means of an actuation means (D). A piston (11) is inserted into a cylinder (10) fixedly secured to th...	03/17/1992
5079997	Piston seal device for a pneumatic cylinder A piston seal device of pneumatic cylinder which satisfies the required tightness of a seal as well as the required lubrication characteristics for a piston movement is disclosed. The piston seal device for maintining different pressures acting on each si...	01/14/1992
5054374	Rotary actuator A rotary actuator defining a first arcuate chamber and a second chamber, the housing having an inwardly projecting, peripherally extending rib which defines an aperture in open communication with the arcuate chamber, a peripherally extending groove being ...	10/08/1991
4644852	Actuator having tolerance to ballistic damage An actuator (10) tolerant of ballistic damage thereto includes a piston (25) longitudinally reciprocable within a cylinder (15) and connected to a rod (30), the piston comprising a plurality of longitudinally stiff, circumferentially spaced ribs (35) join...	02/24/1987
4635778	Fluid-operated piston A fluid-operated friction engaged torque transmitting device, such as a clutch or brake, has a piston member. The piston has a rigid material, such as metal or plastic body member which is encased in an elastomeric cover. The elastomeric cover is a molded...	01/13/1987
4581981	Actuator having tolerance to ballistic damage An actuator (10) tolerant of ballistic damage thereto includes a piston (25) longitudinally reciprocable within a cylinder (15) and connected to a rod (30), the piston comprising a plurality of longitudinally stiff, circumferentially spaced ribs (35) join...	04/15/1986
4552344	Barrier fluid sealed piston for road wheel suspension A hydropneumatic suspension unit includes a large diameter flanged road arm spindle which is bolted to the vehicle hull; a road arm has one end rotatably mounted on the road arm spindle and another end mounting a road wheel; a barrier fluid sealed piston ...	11/12/1985
4474106	Fluidic self adjusting seal assembly A fluidic bearing seal assembly comprised of a plurality of floating back ring seals positioned in a plurality of annular grooves in a piston with at least one free-floating sealing wedge fitted to the outer peripheral edge of each backing ring for slidi...	10/02/1984
4455974	Gas bearing piston assembly A gas bearing supported piston assembly (2) for an internal combustion engine including a piston body (14, 14') and a segmented piston ring (3) arranged to expand to compensate for wear. A piston supporting gas layer (27) is formed between the cylinder wa...	06/26/1984
4217865	Internal combustion engine An internal combustion engine having a piston assembly such that gaseous flow into a cylinder is through the piston assembly and wherein all gaseous flow in a cylinder is in a single direction. The piston assembly includes inner and outer piston members w...	08/19/1980
4154207	Piston and ring for reducing HC emissions An internal combustion engine is provided with pistons having openings connecting the space behind one of the piston rings with the crankcase during certain portions of the operating cycle of the engine. This is accomplished by the use of a differential p...	05/15/1979
4024743	Sealing device for an extrusion press or a compacting press The sealing device comprises two interengaged members forming a clearance space in which is imprisoned a deformable seal for ensuring pressure-tightness between the members and the internal surface of the press chamber. The member which is in contact with...	05/24/1977

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Class 92/183 - Valved