Screw compressor capable of manually adjusting both internal...

Details Screw compressor capable of manually adjusting both internal... Screw compressor capable of manually adjusting both internal...

2007-01-23

2007-01-23

Campbell, Thor S. (Department: 3742)

Pumps

Processes

C417S282000, C418S001000

Reexamination Certificate

active

10798879

ABSTRACT:
A screw compressor is equipped with a manually operated internal volume ratio adjusting slide valve and capacity adjusting slide valve. The compressor is simple in construction, can be produced with low cost, can accommodate decrease in suction pressure, for example, in an aged gas well, and can be operated without an electric power source for controlling the operation thereof. Also a combined screw compressor unit consisting of a plurality of screw compressors for producing high discharge pressure is provided which can accommodate high suction pressure in order not to overload the higher pressure compressor or compressors with the efficiency of the unit kept as high as possible by including at least a screw compressor according to the present invention in the unit.

REFERENCES:
patent: 4149827 (1979-04-01), Hofmann, Jr.
patent: 4544333 (1985-10-01), Hirano
patent: 4548549 (1985-10-01), Murphy et al.
patent: 4609329 (1986-09-01), Pillis et al.
patent: 4812110 (1989-03-01), Kubo et al.
patent: 5606853 (1997-03-01), Birch et al.

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