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| Number | Title | Issue Date |
| 7194861 | Two stroke steam-to-vacuum engine A two stroke steam-to-vacuum engine comprises a plurality of cylinders (500, 502) each cylinder having a piston (504, 510), a piston rod (506, 512), and a steam chamber (508, 514), the piston rods connected for synchronous movement such t... | 03/27/2007 |
| 7191596 | Stirling engine and hybrid system that uses the Stirling engine A Stirling engine includes at least a first cylinder and a second cylinder arranged in serial, and a heat exchanger. The heat exchanger includes a radiator, a regenerator, and a heater. At least a part of the heat exchanger is formed in a curved shape so as to conne... | 03/20/2007 |
| 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 |
| 6953010 | Opposed piston opposed cylinder free piston engine A free piston engine is configured with a pair of opposed engine cylinders located on opposite sides of a fluid pumping assembly. An inner piston assembly includes a pair of inner pistons, one each operatively located in a respective one of the engine cylinders, wit... | 10/11/2005 |
| 6948459 | Position sensing for a free piston engine A free piston engine is configured with a pair of opposed engine cylinders located on opposite sides of a fluid pumping assembly. An inner piston assembly includes a pair of inner pistons, one each operatively located in a respective one of the engine cylinders, wit... | 09/27/2005 |
| 6456508 | Drive apparatus for vibrating-type compressor A drive apparatus for a vibrating-type compressor includes a DC power source as well as an inverter including switching elements. The inverter is adapted to convert direct time to alternating current through alternating switching of the switching elements... | 09/24/2002 |
| 6171063 | Control circuit for vibrating compressors for protecting against excessive voltage and temperature A control circuit for vibrating compressors for converting d-c voltage into a-c voltage to supply a-c voltage to a vibrating compressor (1) comprising a MOS-FET transistor (2) for driving the vibrating compressor (1), a timer IC for generating pulses to s... | 01/09/2001 |
| 4637209 | Fluid driven power plant A fluid-driven power plant includes a motor and a combustion energy input device combined in a closed, pressurized system. A balanced cylinder provides variable low pressure fluid storage within the system and also operates the compression stroke of the c... | 01/20/1987 |
| 4589380 | Cyclic dwell engine The invention disclosed herein is a cyclic power mechanism including means providing for a variable dwell between cycles of the mechanism. The mechanism produces energy during each cycle and stores the energy of each cycle for consumption. The variable dw... | 05/20/1986 |
| 4507924 | System for efficiently converting hydrocarbons into power The system of this disclosure provides apparatus by which fossil fuel is utilized in the generation of power. The generated power is more efficiently utilized by the apparatus. The system includes an internal combustion process which moves a piston. The p... | 04/02/1985 |
| 4459084 | Internal combustion driven pumping system and variable torque transmission An internal combustion driven fluid pumping apparatus for accumulating fluid pressure to be applied against a load includes a two-stroke combustion cylinder having a piston drivingly connected to a piston of a linearly disposed compression cylinder, which... | 07/10/1984 |
| 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 |
| 4308720 | Linear engine/hydraulic pump A linear engine/hydraulic pump system provides an efficient source of controllable fluid power thay may be used for a hydrostatic drive system of a vehicle. The engine/pump has a prompt first stroke full power capability and capability of prompt power inc... | 01/05/1982 |
| 4087205 | Free-piston engine-pump unit A hybrid propulsion system, particularly for a vehicle, having a free piston type engine-pump unit connected to a working fluid circuit for controlling pressurization of a working fluid, which fluid in turn drives a hydraulic motor interconnected to the v... | 05/02/1978 |
