| Sumitomo (SHI) Cryogenics of America, Inc Patent applications |
| Patent application number | Title | Published |
|---|
| 20110219810 | GAS BALANCED CRYOGENIC EXPANSION ENGINE - 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. | 09-15-2011 |
| 20110030392 | EXPANDER SPEED CONTROL - Apparatus and method for controlling the speed for a GM type expander includes relays that interrupt power when the current in the line is zero. The speed controller apparatus limits the maximum speed providing the expander with sufficient gas to meet its cooling requirements. | 02-10-2011 |
| 20100011784 | CRYOPUMP LOUVER EXTENSION - A standard size cryopump adapted to be mounted behind a nonstandard gate valve by extending the inlet array to a larger diameter. A standard size cryopump adapted to be mounted behind a nonstandard gate valve by using an extension attached to flanges, where the flanges correspond to the diameter of the nonstandard gate valve. | 01-21-2010 |
