Crank case shut off valve

Details Crank case shut off valve Crank case shut off valve

2008-04-29

2008-04-29

Kramer, Devon C. (Department: 3746)

Pumps

Condition responsive control of drive transmission or pump...

Adjustable cam or linkage

C417S222100, C417S269000, C417S270000

Reexamination Certificate

active

07364408

ABSTRACT:
The invention provides a compressor with a shut off valve disposed between the crank case and the suction cavity. The valve is moveable between an open and closed position in response to the pressure in the discharge cavity of the compressor. The valve is an on/off valve and is operable rapidly depressurize the interior of the crank case when the compressor transitions from a minimum stroke. The valve can define first and second fluid pathways. The first fluid pathway can be larger than the second fluid pathway and be selectively opened and closed. The second fluid pathway can be permanently open and act as a bleed between the crank case and the suction cavity.

REFERENCES:
patent: 4752189 (1988-06-01), Bearint
patent: 5318410 (1994-06-01), Kawamura et al.
patent: 6074173 (2000-06-01), Taguchi
patent: 6099276 (2000-08-01), Taguchi
patent: 6267562 (2001-07-01), Hirota
patent: 6334759 (2002-01-01), Kaneko et al.
patent: 6374625 (2002-04-01), Fujii et al.
patent: 6540488 (2003-04-01), Takai et al.
patent: 2002/0069657 (2002-06-01), Fujii et al.
patent: 2003/0044291 (2003-03-01), Umemura et al.
patent: 2003/0086791 (2003-05-01), Breindel et al.

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