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US 4,530,208 AGranted
Fluid circulating system
OwnerShigeki Satoinventor
Life of this patent
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Abstract
A fluid circulating system includes a thermal differential engine having a pair of expansion-contraction vessels each containing an expansion component expansible with heat for discharging fluid to a delivery line when heated and drawing fluid from a return line when cooled. Heated water is supplied alternatively to the pair of vessels to circulate the fluid through the delivery and return lines. The pair of expansion-contraction vessels are identical in volume and other characteristics and have multiple ports connected to anti-convectional valves and change-over valve.
Claims20
A fluid circulating system comprising:
- (a) a source of a first fluid, serving as a heat transfer medium;
- (b) first and second closed vessels for containing a second fluid, serving as a working fluid, and having an inlet and an outlet for the working fluid;
- (c) expansion means, contained wholly within each of said vessels, for expansion responsive to a temperature increase to displace working fluid from the vessel and contraction responsive to a temperature decrease to draw working fluid into the vessel;
- (d) supply means for alternately supplying said first fluid to said first vessel or to said second vessel, said supply means including a changeover valve for switching the supply of first fluid from one of said vessels to another of said vessels, and a
- (e) working fluid circulation loop, connected at one end to both of said inlets and at the other end to both of said outlets.
2 more elements
Dependencies are inferred from the claim text.