Rotary expansible chamber devices – Trapped fluid relief
Patent
1976-10-22
1977-11-08
Vrablik, John J.
Rotary expansible chamber devices
Trapped fluid relief
418206, F01C 118, F01C 2112, F04C 108, F04C 1502
Patent
active
040573753
ABSTRACT:
A semi-positive displacement pump of modular structure that includes a center plate, a pump defining housing removably secured to a first side thereof, a gear containing housing removably affixed to a second side, first and second impellers disposed in spaced relationship in the pump cavity between a fluid inlet and fluid outlet defined therein. The pump may be selectively driven either manually or by power means. The bottom of the pump chamber and the surface of the center plate most adjacent the pump chamber have first and second sets of aligned pressure relief cavities formed therein. The first and second impellers include first and second cylindrical hubs of substantial diameter that have their ends closely disposed to transverse center portions of the bottom of the pump chamber and center plate defined between the first and second pressure relief cavities formed therein. The first and second impellers have first and second circumferentially spaced vanes extending radially therefrom which cooperate with the interior surface of the pump chamber to define first and second laterally spaced confined spaces that force fluid from the inlet to the outlet side of the pump chamber as the first and second impellers are counter-rotated.
REFERENCES:
patent: 902702 (1908-11-01), Wainwright
patent: 1035468 (1912-08-01), Reagan
patent: 1129091 (1915-02-01), Hawley
patent: 1362621 (1920-12-01), Hawley
patent: 1666321 (1928-04-01), Weeden
patent: 2446194 (1948-08-01), Samiran
patent: 2934260 (1960-04-01), Rosentrater
Babcock William C.
Vrablik John J.
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