Drive mechanism for a refrigerator with clearance seals

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

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Details

60520, 74569, 92136, F25B 900

Patent

active

045206295

ABSTRACT:
An improved cryogenic refrigerator having a drive mechanism suitable for use with gap or clearance seals is disclosed. The drive mechanism includes two reciprocating members, e.g. piston and regenerator/displacer, driven by a common rotating drive shaft. The regenerator/displacer portion of the drive shaft includes a roller at one end in engagement with a rod base plate for driving a rod connected to the regenerator/displacer and a spring for returning the regenerator/displacer simultaneously with the withdrawal of the drive shaft. The piston portion of the drive shaft is connected to a first end of a hollow body. The second end of the hollow body which is opposite the first end has the piston rigidly affixed thereto. The hollow body has a portion adjacent the first end supported by a guide whereby the piston is substantially isolated from side force loads during reciprocation.

REFERENCES:
patent: 3118322 (1964-01-01), Oldberg et al.
patent: 3416308 (1968-12-01), Livezey
patent: 3574998 (1971-04-01), von Bredow et al.

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