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...
Patent
1986-08-14
1988-04-12
Husar, Stephen F.
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...
277157, 277174, 277193, 277215, 277216, F02G 104, F16J 900
Patent
active
047365862
ABSTRACT:
A seal mechanism for a Stirling engine has an upper and lower piston ring mounted on a displacer piston with a space therebetween and at least one piston ring mounted on a power piston. The seals produced by the piston rings of the displacer piston are given directionality in opposite directions so that the pressure within the space between the upper and lower piston rings is always higher or lower than the pressure within the expansion space and the compression space of the engine. In a preferred embodiment, the displacer piston rings each comprise two loosely-fitting outer rings which surround an inner ring. Air vents are formed in one surface of each of the inner rings between the center and the outer surface of the inner ring. The inner rings of the upper and lower piston rings are oriented so that the air vents face in opposite directions. Means for imparting directionality in the same direction to the seals produced by the power piston rings may also be provided.
REFERENCES:
patent: 3396976 (1968-08-01), Reinhoudt et al.
Japan Patent Abstracts, vol. 1, No. 149, p. 5032 M 77, Nov. 17, 1987.
"Stirling Engine", G. Walker, Oxford University Press, 7/1980, p. 88.
Fujiwara Michio
Kawajiri Kazuhiko
Kazumoto Yoshio
Nomaguchi Tamotsu
Tsuchino Kazunori
Husar Stephen F.
Mitsubishi Denki & Kabushiki Kaisha
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