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| Number | Title | Issue Date |
| 7310965 | Compressor head, internal discriminator, external discriminator, manifold design for refrigeration recovery apparatus The compressor head, internal and/or external discriminator, and manifold design in general utilize ball valves on the suction and discharge of a cylinder head in the recovery of refrigerant liquid and/or vapor. The device facilitates the flashing of liquid refriger... | 12/25/2007 |
| 7228785 | Piston rod for a vibration damper with amplitude-dependent damping force A piston rod has a hollow section with an open end, a housing, and a fastening connection for a piston. The housing includes a cap welded to the open end, a tubular intermediate piece welded to the cap, and a bottom part attached to the fastening connection. The cap... | 06/12/2007 |
| 7197975 | Piston-cylinder unit Piston-cylinder unit including a working cylinder; a piston attached to a piston rod and installed with freedom of axial displacement in the working cylinder; and fastening elements, at least one of which is screwed into a threaded bore in the piston rod, where the ... | 04/03/2007 |
| 7174828 | Linear actuator A linear hydraulic actuator comprises a hollow main piston axially moveable in an elongate cylinder under the influence of hydraulic pressure, the main piston defining a bore within which a seal member is provided, the seal member forming a sliding seal with the bor... | 02/13/2007 |
| 7159412 | Compressor head, internal discriminator, external discriminator, manifold design for refrigeration recovery apparatus The compressor head, internal and/or external discriminator, and manifold design in general utilize ball valves on the suction and discharge of a cylinder head in the recovery of refrigerant liquid and/or vapor. The device facilitates the flashing of liquid refriger... | 01/09/2007 |
| 7073346 | Compressor head, internal discriminator, external discriminator, manifold design for refrigerant recovery apparatus and vacuum sensor The compressor head, internal and/or external discriminator, and manifold design in general utilize ball valves on the suction and discharge of a cylinder head in the recovery of refrigerant liquid and/or vapor. The device facilitates the flashing of liquid refriger... | 07/11/2006 |
| 7047734 | Hydraulic circuit for hydraulic cylinder A hydraulic circuit for a hydraulic cylinder capable of executing and adjusting a shock absorbing function at the time of stopping the operation of a cylinder piston rod and releasing the function, comprises a damping control valve (v1) having a first switchi... | 05/23/2006 |
| 7007590 | Device with at least one extension arm or support arm for multi-linked crane shaped extension arms, concrete spreader columns and similar The invention relates to a device with at least one extension arm or support arm for multi-linked crane shaped extension arms, concrete spreader columns and similar, comprising at least one hydraulic differential cylinder for actuating a support arm. The cylinder co... | 03/07/2006 |
| 6279421 | Connecting rod assembly with reduced length variability A connecting rod assembly for rocking piston compressors, diaphragm compressors and vacuum pumps is provided where the overall height of the connecting rod assembly is dependent only upon the overall height of the connecting rod structure and is not depen... | 08/28/2001 |
| 6223649 | Piston-cylinder unit A piston/cylinder unit includes a working cylinder, a piston attached to a piston rod and arranged so that it is axially movable in the working cylinder, and a fastening element threaded into a threaded bore of the piston rod. The bore in the piston rod i... | 05/01/2001 |
| 5213025 | Conical rod piston A one-piece piston assembly including a hollow frusto-conical piston is secured to a crankshaft ring via a hollow joint or waist member. Preferably the joint or waist member is frusto-conically shaped as well.... | 05/25/1993 |
| 5191828 | Telescopic cylinder with increased lateral loading capacity An upstanding telescopic cylinder including piston and cylinder sections is provided and the piston and cylinder sections include large, inner and outer relatively telescopingly engaged guide sleeves with the cylinder guide sleeve disposed outermost. The ... | 03/09/1993 |
| 5092224 | Conical rod piston An improved wobble-type piston and rod assembly wherein the assembly includes a conical or infundibularly shaped piston that is capable of withstanding non-axial stress and strain forces induced by reciprocation of the crank shaft ring. An apex of the inf... | 03/03/1992 |
| 5070766 | Hydraulic valve actuator This hydraulic actuator has a drive volume (11) pressurized by extreme-pressure oil. The oil pressure is converted into a valve movement by a drive piston (10). A spring element acts upon the drive piston (10) in a manner opposing the oil pressure. The ac... | 12/10/1991 |
| 5014601 | Working cylinder The invention relates to a working cylinder comprising a cylinder unit with a front end part, a rear end part and a cylinder tube connecting these end parts, a piston movable in the cylinder tube and a piston rod secured to the piston and extending throug... | 05/14/1991 |
| 4899642 | Pneumatic combined with hydraulic brake chamber The present invention provides a kind of pneumatic combined with hydraulic brake chamber, especially relating to a powerful hydraulic brake chamber which is highly stable, ready to provide high-pressure and high-speed actuation and easy to be assembled, d... | 02/13/1990 |
| 4834620 | Low horsepower apparatus and technique for raising liquid above the static surface level thereof To achieve a flywheel effect and lower the power necessary to drive it, a float pump is modified and put to use in such a way that one-half of the stroke of the pump is powered by the negative or positive buoyancy of the system of reciprocating components... | 05/30/1989 |
| 4628795 | Piston of a pressure-medium actuator with a piston rod of adjustable effective length A piston for actuating a brake-band end of a transmission band system includes a piston for actuating a band in a transmission. The piston includes a piston body, and an elongated guide shaft having a proximal end fixed to one side of the piston body and ... | 12/16/1986 |
| 4620625 | Fluid actuated clutch assembly A system for actuating a clutch by axial movement of an actuating member which is rotatable about a clutch axis with the axial movement for actuating occurring via engagement of the actuating member with a clutch release bearing, the system including a fl... | 11/04/1986 |
| 4561531 | Hydraulic slave cylinder with latch means for use with clutch release bearing Concentric piston and cylinder components of a hydraulic slave cylinder used with a clutch release bearing have their axial movement under a biassing spring limited by latch means in the form of flanges. The flanges each have a radial face and a chamfered... | 12/31/1985 |
| 4467702 | Hydraulic jacks A hydraulic jack having a piston and a cylinder in which the piston has at its head a cavity the dimensions of the cavity and the constructional materials of the cylinder and the piston being selected so that hydraulic pressure applied within the cylinder... | 08/28/1984 |
| 4281589 | Working cylinder for pneumatic or hydraulic pressure media A working cylinder for pneumatic or hydraulic pressure media for producing a rectilinear operating movement. The working cylinder has at least one operating chamber which receives the pressure medium and includes one stationary rigid housing part which pr... | 08/04/1981 |
| 4086985 | Disc brake operating piston A disc brake operating piston includes a hollow, cylindrical body which is open at one end thereof and is closed at its opposite end by an integral base member. The body is formed of a synthetic resin material and the base member is provided with an upsta... | 05/02/1978 |
| 4024800 | Actuating and bracing jack An actuating and bracing jack comprising a cylinder and a rod which are pivotably connected at their free ends to a fixed member and to a moveable member respectively. The cylinder has at least at one of its extremities, an internal resilient catch member... | 05/24/1977 |
| 4003297 | Hydraulic cylinder A hydraulic cylinder assembly for farm machinery or the like including a tubular elongate cylinder with a smooth inner cylindrical wall and a fluid inlet at a first end with a hollow piston rod slidable therein having an annular piston secured at a first ... | 01/18/1977 |
| 3972346 | Pressure regulator A pressure regulator comprising a body having an inlet, a first channel, an outlet for passage of gas therethrough and a chamber, a valve located within the channel between inlet and outlet for regulating outlet pressure, the inlet being in effective comm... | 08/03/1976 |
| 3955660 | Clutch with flexible coupling between release bearing and levers A clutch release bearing and actuating mechanism, for a motor vehicle, comprises a clutch-disengaging device which is actuable, via a rolling-element thrust bearing, by a hydraulically actuated device. The hydraulically actuated device comprises a pair of... | 05/11/1976 |
| 3951045 | Power assisted rack and pinion steering gear A compact rack and pinion steering gear having a hydraulically operated power cylinder concentric with respect to an internal cylindrical tube slidably supporting a pinion driven rack. The piston of the power cylinder is slidably mounted in the power cyli... | 04/20/1976 |
| 3938427 | Percussion hammer There is provided an improved percussion hammer having tie cables connecting the base of the hammer body with the upper cylinder. Cable tensioning jacks are used for preloading the tie cables. Each cable tensioning jack includes a jack body having a centr... | 02/17/1976 |
