Pumps – Condition responsive control of drive transmission or pump... – Having condition responsive pumped fluid control
Reexamination Certificate
2006-06-07
2010-11-02
Kramer, Devon C (Department: 3746)
Pumps
Condition responsive control of drive transmission or pump...
Having condition responsive pumped fluid control
C417S279000, C417S410500, C062S505000
Reexamination Certificate
active
07824160
ABSTRACT:
A scroll back pressure chamber in a scroll compressor is composed of a space111filled with suction pressure (or intermediate pressure) and a space filled with discharge pressure, and the summation of the suction pressure (or the intermediate pressure) and the discharge pressure presses one of scrolls against the other of the scrolls. An injection hole, through which refrigerant in gas state or refrigerant in liquid state is injected into a compression chamber of the scroll compressor, is provided on a fixed scroll, and the gas refrigerant injection or the liquid refrigerant injection is selected and carried out according to an operating pressure ratio.
REFERENCES:
patent: 5103652 (1992-04-01), Mizuno et al.
patent: 5469716 (1995-11-01), Bass et al.
patent: 5722257 (1998-03-01), Ishii et al.
patent: 05-302760 (1993-11-01), None
patent: 09-229496 (1997-09-01), None
Hasegawa Shuji
Matsunaga Mutsunori
Nakamura Satoshi
Tojo Kenji
Antonelli, Terry Stout & Kraus, LLP.
Hitachi Appliances, Inc.
Jacobs Todd D
Kramer Devon C
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