Stirling engine

Details Stirling engine Stirling engine

2005-04-05

2005-04-05

Richter, Sheldon J (Department: 3748)

Power plants

Motor operated by expansion and/or contraction of a unit of...

Unit of mass is a gas which is heated or cooled in one of a...

C062S006000

Reexamination Certificate

active

06874321

ABSTRACT:
A free-piston type Stirling engine used for producing cold heat with the vibration center position of a piston accurately kept. A first space is formed on one side of a piston, and a second space is formed on the opposite side to spread up to a portion adjacent to a cylinder's side wall. A piston is provided with a vibration-direction first groove extending up to the first space and a circumferential-direction second groove, and a cylinder is provided with a hole penetrating the side wall thereof. The second groove of the piston, when coupled with the cylinder's hole during a piston vibration process, allows the first space to communicate with the second space. Accordingly, a short-time communication between the first and second spaces will balance pressures in the two spaces against each other to keep the vibration center position of the piston accurately.

REFERENCES:
patent: 5461859 (1995-10-01), Beale et al.
patent: 6694730 (2004-02-01), O'Baid et al.
patent: 60-43157 (1985-03-01), None
patent: 3-121244 (1991-05-01), None
patent: 2000-39222 (2000-02-01), None

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