Refrigeration – Gas compression – heat regeneration and expansion – e.g.,...
Reexamination Certificate
2005-03-08
2009-12-15
Doerrler, William C (Department: 3744)
Refrigeration
Gas compression, heat regeneration and expansion, e.g.,...
C251S129110, C251S304000
Reexamination Certificate
active
07631505
ABSTRACT:
An improved method of reducing wear dust and torque required to turn a multi-port rotary disc valve utilizes a thrust bearing to hold the valve seat and/or valve disc such that they are not in contact with each other, or have light contact each other.
REFERENCES:
patent: 2147851 (1939-02-01), Mallon
patent: 2319733 (1943-05-01), Hall
patent: 2832561 (1958-04-01), Holl
patent: 3119237 (1964-01-01), Gifford
patent: 3205668 (1965-09-01), Gifford
patent: 3237421 (1966-03-01), Gifford
patent: 3620029 (1971-11-01), Longsworth
patent: 3625015 (1971-12-01), Chellis
patent: 3677295 (1972-07-01), Schultz
patent: 4231440 (1980-11-01), Erwin
patent: 4373476 (1983-02-01), Vervoordt et al.
patent: 4925464 (1990-05-01), Rabenau et al.
patent: 4987743 (1991-01-01), Lobb
patent: 5315963 (1994-05-01), Warf
patent: 6256998 (2001-07-01), Gao
patent: 6694749 (2004-02-01), Heron
patent: 2002/0066276 (2002-06-01), Kawano et al.
E.I. Mikulin, et al. Low Temperature Expansion Pulse Tube, Advances in Cryogenic Engineering, vol. 29, 1984, p. 629-p. 637, Moscow High Technical School, Moscow, USSR.
Gao Jin Lin
Longsworth Ralph C.
Seitz Eric
Xu Mingyao
Doerrler William C
Katten Muchin & Rosenman LLP
Sumitomo (SHI) Cryogenics of America, Inc.
Sumitomo Heavy Industrie's, Ltd.
LandOfFree
Wearless valve for cryorefrigerator does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Wearless valve for cryorefrigerator, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Wearless valve for cryorefrigerator will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-4105814