Pulse tube refrigerator

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

Reexamination Certificate

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C062S335000

Reexamination Certificate

active

10747252

ABSTRACT:
A pulse tube refrigerator comprising a cold head, wherein the cold head comprises at least one pulse tube (6) and at least one regenerator (7); the cold head having a cold end (8) and a warm end (5), each end being provided with respective heat exchangers (12, 13); wherein refrigerant is supplied (3) to the cold head; and wherein the warm end heat exchanger (13) is provided with a secondary cooling mechanism (16, 17) to improve the efficiency of the PTR.

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patent: 5680768 (1997-10-01), Rattray et al.
patent: 5791149 (1998-08-01), Dean
patent: 5813234 (1998-09-01), Wighard
patent: 6205812 (2001-03-01), Acharya et al.
patent: 6374617 (2002-04-01), Bonaquist et al.
patent: 6389819 (2002-05-01), Zhu et al.
patent: 6640553 (2003-11-01), Kotsubo et al.
patent: 6644038 (2003-11-01), Acharya et al.
patent: 2310486 (1997-08-01), None

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