Reduced torque valve for cryogenic refrigerator

Details Reduced torque valve for cryogenic refrigerator Reduced torque valve for cryogenic refrigerator

2005-01-20

2010-02-02

Doerrler, William C (Department: 3744)

Refrigeration

Gas compression, heat regeneration and expansion, e.g.,...

C137S625460, C251S129110

Reexamination Certificate

active

07654096

ABSTRACT:
A rotary valve unit which reduces the torque required to turn the valve disc, and the amount of wear dust that is blown into the cold head, using differential gas forces to keep the valve disc in contact with the valve seat, and which enables larger diameter valve discs to be utilized for multi-ported pulse tubes that have less force on the face of the valve disc, resulting in reduced torque and reduced wear rate.

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