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US 5,174,116 AGranted
Displacer-type Stirling engine
AssigneeAisin Seiki Kabushiki Kaisha
InventorHiroki Ishikawa
Life of this patent
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Abstract
A displacer-type Stirling engine includes buffer space provided in back of a power piston, and a front chamber in which a small-diameter piston provided on an end of a displacer rod is reciprocated. The buffer space and the front chamber are communicated by a conduit so that a fluctuation in pressure which develops in the buffer space is used as an auxiliary power source for driving the displacer rod.
Claims4
A displacer-type Stirling engine comprising:
- a motor;
- a displacer rod reciprocated by said motor;
- a displacer piston reciprocated by said displacer rod;
- a free power piston reciprocated by a change in a working pas pressure due to a movement of said displacer, said free power piston defining a first buffer space at a back surface thereof;
- a second piston provided on an end of said displacer rod so as to be reciprocated thereby, said second piston having a diameter smaller than that of said displacer piston;
- a front chamber in which said second piston is reciprocated;
- and
- a conduit communicating said first buffer space and said front chamber;
- a fluctuation in pressure which is produced in said buffer space being used as an auxiliary power source for driving said displacer rod.
6 more elements
Dependencies are inferred from the claim text.