Temperature-difference-actuated pump employing nonelectrical val

Details Temperature-difference-actuated pump employing nonelectrical val Temperature-difference-actuated pump employing nonelectrical val

1986-08-12

1987-04-07

Smith, Leonard E.

Pumps

One fluid pumped by contact or entrainment with another

Liquid pumped by supplying or exhausting gaseous motive...

417379, 60667, 60691, F04B 900, F04B 4704

Patent

active

046556915

ABSTRACT:
A temperature-difference-actuated pump is disclosed which does not require the use of electrically operated solenoid valves or the like, making the inventive pump especially useful in locations where electricity is not readily available. Either one or two pump chambers is provided, in which is disposed a pumping element such as a flexible bag or piston. One side of each chamber is connected selectively to a boiler or condenser through a mechanically operated switch deriving its working power from the pumping element. The other side of the chamber is utilized to provide the pumping action, either directly or via a noncondensable fluid.

REFERENCES:
patent: 2553276 (1951-05-01), Reed
patent: 2807215 (1957-09-01), Hawxhurst
patent: 3937599 (1976-02-01), Thureau et al.
patent: 4030302 (1977-06-01), Mankouski
patent: 4110986 (1978-09-01), Tacchi

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