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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 |
| 5735675 | Combination compressor unloader A combination compressor unloader which has a horizontal cylinder and a double acting piston forming two compression chambers. Each chamber communicates by a passageway with a supplementary chamber with each passageway associated with a reversible actuato... | 04/07/1998 |
| 5275538 | Electric drive water pump A coolant pump system driven by an electric motor mounted in-line with the pump shaft to the pump housing. The system minimally includes a pump body having a bore therein, a coolant pump impeller, a pump shaft passing through the bore and having the impel... | 01/04/1994 |
| 4842489 | Hand-operated pump changeable from dual action to single action The invention provides a hand-operated pump for fluids in general, which comprises a body inside which a cylindrical hollow is provided, inside which a plunger is slidingly mounted, such a plunger dividing said hollow into a first variable-volume chamber ... | 06/27/1989 |
| 4838768 | Convertible pump system A fluid pump system whose output can be varied by converting it from maximum output to a lesser output and in between by dumping or varying one of its pumping elements or pistons to the inlet side of the pump. More specifically, a pump is provided with tw... | 06/13/1989 |
| 4382748 | Opposed piston type free piston engine pump unit A free piston engine pump (FPEP) converts combustion energy into hydraulic power in an efficient, controlled and relatively uncomplicated manner, for example, for vehicle propulsion, auxiliary system power, etc. The FPEP is substantially naturally mass ba... | 05/10/1983 |
