Pulse tube refrigerator system

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

Reexamination Certificate

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Reexamination Certificate

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06996993

ABSTRACT:
A pulse tube refrigerator system comprises a pulse tube refrigerator and a compressor coupled together via a high pressure line and a low pressure line. Cryogenic fluid is transferred to the PTR via the high pressure line and returned to the compressor via the low pressure line. The system further comprises an acoustic tuning device coupled to the low pressure line between a low pressure output from the PTr and a lower pressure input to the compressor, such that noise and vibration in the PTR system are reduced.

REFERENCES:
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patent: 5341654 (1994-08-01), Hewette et al.
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patent: 5647219 (1997-07-01), Rattray et al.
patent: 5735127 (1998-04-01), Pfotenhauer et al.
patent: 5782095 (1998-07-01), Chen
patent: 6021643 (2000-02-01), Swift et al.
patent: 6082117 (2000-07-01), Funatsu et al.
patent: 6351954 (2002-03-01), Nogawa et al.
patent: 6378312 (2002-04-01), Wang
patent: 6434947 (2002-08-01), Zhu et al.
patent: 63-217608 (1988-09-01), None
patent: 2002-61508 (2002-02-01), None
British Examination Report dated Apr. 6, 2005.

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