Rotary cavity pump
OwnerSteve C. Smithinventor
Life of this patent
Estimating the term…
Abstract
A pump housing supports a plurality of pump segments each having a raised pump cavity enclosed by a resilient diaphragm sealed to the pump cavity. A compression plate supports a plurality of rollers against the pump segments. The compression plate is rotatable with respect to the pump housing to move the rollers across the pump segments deforming the diaphragms and expelling fluid from the pump segments. Fluid passages couple each pump cavity to a source of fluid and a fluid output. As each roller rolls across each diaphragm to expel fluid from the pump segment, the resilience of the diaphragm draws fluid into the pump segment behind the roller to refill the pump segment.
Claims19
A drive cavity pump for pumping a fluid, said pump comprising:
- a pump housing having a plurality of pump cavities each defining a pump recess and first and second apertures in said recess;
- a plurality of diaphragms sealingly supported upon said plurality of pump cavities each of said diaphragms being formed of a flexible resilient material which together with said pump recesses forms a sealed fluid cavity having said first and second apertures therein;
- a first fluid coupling and means for coupling said first fluid coupling to said first apertures;
- a second fluid coupling and means for coupling said second fluid coupling to said second apertures;
- a plurality of diaphragm compression members;
- and
- means for moving said plurality of diaphragm compression members upon and across said diaphragms,
- said diaphragms being compressed into said recesses to block said first apertures and captivate a quantity of fluid and to expel said quantity outwardly through said second apertures.
A rotary cavity pump for pumping a fluid, said pump comprising:
- a transfer plate having a plurality of arcuate pump cavities each defining an arcuate recess, a first aperture and first passage at one end of each said recess and a second aperture and second passage at the remaining end of each said recess;
- a manifold coupled to said transfer plate having a first fluid port coupled to each of said first passages and a second fluid port coupled to each of said second passages;
- a plurality of resilient diaphragms each sealingly supported upon one of said pump cavities;
- and
- a compression plate rotatably supported with respect to said diaphragms and having a plurality of compression members,
- said compression members compressing said diaphragms as said compression plate rotates to isolate fluid within said recesses and expel it through said second apertures and said second passages.
A rotary cavity pump for use with a fluid, said pump comprising:
- a pump housing;
- a compression plate rotatably supported on said pump housing and having a plurality of compression members;
- a plurality of deformable pump segments supported by said pump housing against said compression members, each of said deformable pump segments including,
- an elongated pump cavity having an elongated recess having apertures at each end thereof, and
- a resilient diaphragm covering said pump cavity,
- said resilient diaphragm deforming and reforming as a compression member is moved upon it to draw fluid into said recess through one of said apertures and expel fluid out from said recess through the remaining one of said apertures.
A rotary cavity pump for use with a fluid, said pump comprising:
- a pump housing;
- a compression plate rotatably supported on said pump housing and having a plurality of compression members;
- a plurality of deformable pump segments supported by said pump housing against said compression members, each of said deformable pump segments including,
- an elongated pump cavity having an elongated recess having first and second apertures at first and second ends thereof, and
- a resilient diaphragm covering said pump cavity,
- said resilient diaphragm deforming and reforming as a compression member is moved upon it to draw fluid into said recess through said first aperture and expel fluid out from said recess through said second aperture;
- and
- a transfer plate secured to said compression plate defining a plurality of fluid coupling passage pairs, each pair being coupled to said first and second apertures in said pump cavities.
Dependencies are inferred from the claim text.