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| Number | Title | Issue Date |
| 6959545 | Engine control based on flow rate and pressure for hydraulic hybrid vehicle A system for a hydraulically driven vehicle includes an engine having multiple, selectively operating cylinder-pump banks producing fluid flow at an outlet, a pump/motor having a variable flow rate including an inlet for driving the wheels, a hydraulic line having a... | 11/01/2005 |
| 6945202 | Free piston engine and power generation system therewith A first piston connected to a first shaft and a second piston connected to a second shaft are supported within a housing by using a first leaf-spring unit and a second leaf-spring unit, respectively. Therefore, axial movement of the first shaft or the second shaft c... | 09/20/2005 |
| 5275542 | Free piston-type compressor A free piston type compressor includes a piston slidably fitted within a cylinder. A compression chamber is defined in the cylinder on one side of the piston, and a balance chamber is defined in the cylinder on the other side of the piston. A piston rod i... | 01/04/1994 |
| 4975026 | Free-piston heat pump An end stop is disclosed for limiting the maximum displacement of a flexible member so as to minimize stress on this member and thus provide an extended surface life. The flexible member is rigidly supported at at least two spaced-apart points such that t... | 12/04/1990 |
| 4836757 | Pressure actuated movable head for a resonant reciprocating compressor balance chamber The present invention relates to a resonant piston compressor in which a double-sided piston reciprocates within a cylinder and defines a valved compression space on one side of the piston and a balance chamber on its other side. The invention further inc... | 06/06/1989 |
| 4750870 | Pressure actuated movable head for a resonant reciprocating compressor balance chamber In a resonant piston compressor utilizing a balance chamber to provide a gas spring effect for use in a heat pump arrangement and the like, an adjustable balance cylinder head which adjusts so as to increase or decrease the balance chamber volume so as to... | 06/14/1988 |
| 4553398 | Linear motor compressor with pressure stabilization ports for use in refrigeration systems A pressure stabilization system for a linear compressor 20 piston 24 in which a check valve 68 and passages 72, 64 within the piston permit communication between a compressor work space and a non-working volume of gas 54 through an orifice 66 in the pisto... | 11/19/1985 |
| 4548713 | Pulse damper A pulse damper for use in a liquid chromatographic solvent delivery system includes a cavity within a housing containing a compliant medium. The compliant medium being an elastomer. As a consequence, a solvent flow volume can be precisely formed and maint... | 10/22/1985 |
| 4488853 | Fluid pressure ratio transformer system A fluid pressure ratio transformer which may be utilized to couple pressure variations in a working fluid operating at a given input pressure ratio to a fluid coupled load operating at a different required output pressure ratio. The device is self-modulat... | 12/18/1984 |
