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US 4,553,903 AGranted
Two-stage rotary compressor
OwnerBaruir Ashikianinventor
Life of this patent
Estimating the term…
Abstract
A two-stage rotary compressor makes use of a piston-vane arrangement where both stages are built end to end and where the same members (piston-vanes) work for both stages, the "axial pistons" of the second stage becoming the dividing "vanes" in the first stage.
Claims31
A rotary fluid displacement apparatus having first and second stages and comprising:
- (a) a first body and a second body, one of which is held stationary;
- (b) means defining an axis of relative rotation between said bodies;
- (c) a plurality of piston-vanes mounted in said first body for reciprocating movement relative thereto;
- (d) the second body having cam means co-acting with said piston-vanes such that the reciprocating movement of said piston-vanes occurs in the course of relative rotation between said bodies about said axis;
- (e) one of said stages including a plurality of closed working chambers defined at least in part between adjacent portions of said piston-vanes, said cam means and portions of said first body, and all being arranged such that the volumes of said chambers increase and decrease in cyclical fashion during said relative rotation;
- (f) the other stage including a plurality of closed working chambers comprising elongated bores in said first body in each of which a respective one of said piston-vanes is slidably mounted in sealing engagement with the wall of such bore, with the volumes of said last mentioned working chambers varying in cyclical fashion as said piston-vanes reciprocate in said bores during said relative rotation between said bodies;
- (g) first and second stage inlet and exit port means for admitting and releasing fluid from the working chambers of the two stages in the course of said relative rotation and means defining a path for transmitting the fluid from the first stage to the second stage of the apparatus.
4 more elements
A rotary compressor having first and second stages and comprising:
- (a) a first body and a second body, one of which is held stationary;
- (b) means defining an axis of relative rotation between said bodies;
- (c) a plurality of piston-vanes mounted in said first body for reciprocating movement relative thereto;
- (d) the second body having cam means co-acting with said piston-vanes to effect the reciprocating movement in response to relative rotation between said bodies about said axis;
- (e) said first stage including a plurality of closed working chambers defined at least in part between adjacent portions of said piston-vanes, said cam means and portions of said first body, and all being arranged such that the volumes of said chambers increase and decrease in cyclical fashion during said relative rotation;
- (f) said second stage including a plurality of closed working chambers comprising elongaged bores in said first body in each of which a respective one of said piston-vanes is slidably mounted in sealing engagement with the wall of such bore, with the volumes of said second stage working chambers varying in cyclical fashion as said piston-vanes reciprocate in said bores during said relative rotation between said bodies;
- (g) first and second stage inlet and exit port means for admitting and releasing fluid from said first and second stage working chambers in response to said relative rotation and means defining a path for transmitting the fluid from the first stage to the second stage of the compressor.
4 more elements
Dependencies are inferred from the claim text.