US 11,913,697 B1
Pneumatically actuated cryocooler
Peter J. Ferrara, Westampton, NJ (US); Jacob T. Kephart, Garnet Valley, PA (US); and Avi Friedman, Bethesda, MD (US)
Assigned to The United States of America, as represented by the Secretary of the Navy, Arlington, VA (US)
Filed by The United States of America, as represented by the Secretary of the Navy, Arlington, VA (US)
Filed on Jun. 29, 2020, as Appl. No. 16/946,592.
Int. Cl. F25B 9/14 (2006.01)
CPC F25B 9/14 (2013.01) [F25B 2309/003 (2013.01); F25B 2309/14 (2013.01)] 7 Claims
OG exemplary drawing
 
1. A pneumatic cryocooler capable of operation in a strong magnetic field, comprising:
a cryocooler assembly having a first end and a second end,
the first end comprising a rotary valve, a plurality of ports for a cryogenic fluid, and a motor mount;
the second end comprising a heat exchanger; and
a pneumatic motor assembly comprising a pneumatic motor, the pneumatic motor assembly operably connected to the motor mount on the first end of the cryocooler assembly;
wherein the cryocooler assembly is a GM cryocooler assembly, the plurality of ports carrying cryogenic fluid supplies the cryocooler assembly with the cryogenic fluid, and the plurality of ports comprise separate ports for the cyrogenic fluid and a pneumatic fluid, the pneumatic fluid being different from the cryogenic fluid, and the pneumatic fluid being directed to the pneumatic motor.