Pumps – Motor driven – Fluid motor
Patent
1978-03-31
1980-04-08
Smith, Leonard E.
Pumps
Motor driven
Fluid motor
60531, 60541, F04B 1700, F03G 702, F03G 706
Patent
active
041970608
ABSTRACT:
A heat-powered water pump including a flexible diaphragm as the pumping element with a volatile liquid as a working fluid. The flexible diaphragm is enclosed within a vessel and isolates the working fluid from the water to be pumped. One-way valves control the direction of water flow through the pump. A U-shaped siphon tube acts as a temporary reservoir for the pumped water and is siphoned empty after being filled. A portion of the water siphoned from the U-shaped siphon tube is recirculated through the vessel in heat exchange relationship with the working fluid to condense the working fluid. A reservoir of warm water is maintained in thermal contact with the flexible diaphragm to minimize condensation of the working fluid by thermal contact with the water through the diaphragm.
REFERENCES:
patent: 1780336 (1930-11-01), Canton
patent: 2212281 (1940-08-01), Ullstrand
patent: 2688923 (1954-09-01), Bonaventura et al.
patent: 2755745 (1956-07-01), Lewis
patent: 2867974 (1959-01-01), Wenander
patent: 2918219 (1959-12-01), MacCracken
patent: 3309012 (1967-03-01), Booth et al.
patent: 3937599 (1976-02-01), Thureau et al.
patent: 4089325 (1978-05-01), Brola
Nydegger Rick D.
Smith Leonard E.
Utah State University Foundation
Workman H. Ross
Young J. Winslow
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