Screw displacement pump

Details Screw displacement pump Screw displacement pump

2011-01-04

2011-01-04

Trieu, Theresa (Department: 3748)

Rotary expansible chamber devices

Interengaging rotating members

Helical or herringbone

C418S046000, C418S047000, C418S096000, C418SDIG001

Reexamination Certificate

active

07862315

ABSTRACT:
A screw displacement pump is provided. The screw displacement pump is of single-entry, double-shaft construction with an external bearing of the two screw shafts. A pump housing encloses the screw shafts by forming feed chambers and externally delimiting the feed chambers with its internal shell surface, as well as a suction chamber for the medium to be induced and a pressure chamber to accommodate the medium pumped by the screw shafts. The pump housing is inserted into a pressure housing and attached to the pressure housing, so that the pressure chamber encloses the pump, at least in part.

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patent: 4420293 (1983-12-01), Hofmann
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patent: 6758660 (2004-07-01), Kriehn et al.
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patent: 2 164 312 (2001-03-01), None
International Search Report PCT/ISA/210.
Written Opinion of the International Searching Authority PCT/ISA/237.

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