Pumps – Motor driven – Internal-combustion engine
Reexamination Certificate
2005-03-08
2005-03-08
Freay, Charles G. (Department: 3746)
Pumps
Motor driven
Internal-combustion engine
C123S0460SC
Reexamination Certificate
active
06863507
ABSTRACT:
A free-piston engine directed to reduced throttling losses at minimum expenditure is provided. The free-piston engine has an engine piston, and a hydraulic piston co-operating with the engine piston. The engine piston may receive application of a force in the direction of compression via a hydraulic cylinder. A pressure in a high-pressure accumulator means or a low-pressure accumulator may be communicated to the hydraulic cylinder via a switchover valve. Between the hydraulic cylinder and the switchover valve is a valve assembly including a control piston. A connection to the high-pressure accumulator means may be controlled open with the aid of the control land of the control piston.
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Dantlgraber Joerg
Schaeffer Rudolf
Freay Charles G.
Mannesmann Rexroth AG
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