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| Number | Title | Issue Date |
| 7162944 | Continuous reciprocating linear motion device A linear fluid piston device not requiring a fluid valve to operate and has operating piston stroke capabilities beyond traditional vibration fluid devices. The linear fluid device features (a) a movable piston means for linear motion, (b) a feature wherein said bod... | 01/16/2007 |
| 5261311 | Reciprocating hydraulic motor with a differential piston The invention relates to a reciprocating hydraulic motor having a differential piston interposed between an inlet pipe for fluid at a pressure P1 and an exhaust pipe for fluid at a pressure P2 which is less than the pressure P1 The moving assembly constit... | 11/16/1993 |
| 5151015 | Compression device, particularly for the pressure filling of a container The device for the compression of a gas comprises a motor (1), a piston (2) adapted to be displaced linearly in a pump body, transmission means (T) between the motor (1) and the piston (2) adapted to convert the rotary motion generated by the motor (1) in... | 09/29/1992 |
| 5079992 | Longitudinally controllable adjustment device A longitudinally controllable adjustment device comprises a cylindrical housing, in which a piston rod with a piston is slidable and sealingly extending outwards. Furthermore it comprises a valve for controlling length adjustment of the device. In order t... | 01/14/1992 |
| 5031509 | Anti-leak seal for pump motor Method and apparatus for recovering leaked fluid or directing fluid flow or propagation through utilization of negative pressure pulses occurring in a pressurized fluid system. The invention has particular application in double acting hydraulic fluid moto... | 07/16/1991 |
| 4846634 | Water to emulsion transformer Disclosed is a device for converting pressure fluid input of one fluid to pressure fluid output of a second fluid without contaminating either fluid. The transformation is accomplished by a unique H section piston which cooperates the internally protrudin... | 07/11/1989 |
| 4658913 | Hydropneumatic percussive tool A vibration or reciprocating hydraulically driven impact tool for breaking up paving, compacting soil, or similar construction purposes. The tool employs a piston situated in a housing and configured to form (in cooperation with the housing) three chamber... | 04/21/1987 |
| 4470338 | Self oscillating vacuum actuator A vacuum actuator, suitable for use in an automatic belt tensioning system, oscillates automatically when connected to a source of constant vacuum.... | 09/11/1984 |
| 4464098 | Injection pump An improved injector pump (10) is the subject matter of this application. The pump (10) includes a piston (44) freely disposed for reciprocation within a chamber (32). The piston (44) has an aperture (62) extending axially therethrough. A valve member (96... | 08/07/1984 |
| 4333676 | Rotational mechanism for an excavator grab bucket A mechanism for rotating the grab bucket of an excavator is formed with a stator having a shaft extending into the bore of a rotor with hydraulic ducts being provided in the stator and the rotor in flow communication with each other for activating the gra... | 06/08/1982 |
