Gas balanced cryogenic expansion engine

Number of patents in Portfolio can not be more than 2000

United States of America Patent

PATENT NO 9080794
APP PUB NO 20110219810A1
SERIAL NO

13039763

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Abstract

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An expansion engine operating on a Brayton cycle which is part of a system for producing refrigeration at cryogenic temperatures that includes a compressor, a counter-flow heat exchanger, and a load that may be remote, which is cooled by gas circulating from the engine. The engine has a piston in a cylinder which has nearly the same pressure above and below the piston while it is moving. The piston and valves can be either mechanically or pneumatically actuated and the pressures above and below the piston can be nearly equal by virtue of a regenerator that connects the two spaces or by valves.

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Patent Owner(s)

Patent OwnerAddress
SUMITOMO (SHI) CRYOGENICS OF AMERICA INC1833 VULTEE STREET ALLENTOWN PA 18103

International Classification(s)

Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Longsworth, Ralph Allentown, US 16 102

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