Pumps – With condition responsive pumped fluid control – Pressure responsive relief or bypass valve
Reexamination Certificate
2008-05-27
2008-05-27
Isabella, David J. (Department: 4156)
Pumps
With condition responsive pumped fluid control
Pressure responsive relief or bypass valve
C417S251000, C417S252000, C417S253000, C417S279000, C417S307000, C417S410300, C184S006160, C418S011000
Reexamination Certificate
active
11187882
ABSTRACT:
A multi-stage rotary compressor to reduce a driving load and prevent a malfunction due to an abrupt pressure rising. In the compressor of the type including first and second compressing units mounted in a hermetic casing thereof to compress a gas, the gas being primarily compressed in the first compressing unit and secondarily compressed in the second compressing unit, the interior of the hermetic casing is divided into a plurality of spaces including first and second pressure chambers. The first pressure chamber surrounds the first compressing unit and is kept at a discharge pressure of the first compressing unit, and the second pressure chamber surrounds the second compressing unit and is kept at a discharge pressure of the second compressing unit.
REFERENCES:
patent: 6533558 (2003-03-01), Matsumoto et al.
patent: 2004/0001762 (2004-01-01), Matumoto et al.
patent: 2004/0208769 (2004-10-01), Sato et al.
patent: 1532420 (2004-09-01), None
patent: 02-140477 (1990-05-01), None
patent: 05-133367 (1993-05-01), None
patent: 2002-242834 (2002-08-01), None
patent: 2003-166488 (2003-06-01), None
patent: 2003-172280 (2003-06-01), None
patent: 2004-19599 (2004-01-01), None
The First Office Action dated Oct. 19, 2007 issued by the State Intellectual Property Office of P.R. China in the corresponding Chinese Application No. 2005100877688 (5 pages) with an English language translation (6 pages).
Official Action dated Oct. 19, 2007 issued by the Japanese Patent Office in the corresponding Japanese Application No. 2005-243245 (3 pages).
Isabella David J.
Italiano Rocco
Staas & Halsey , LLP
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