Thermal servo-motor, particularly for valves

Details Thermal servo-motor, particularly for valves Thermal servo-motor, particularly for valves

1984-03-29

1985-08-20

Husar, Stephen F.

Power plants

Motor operated by expansion and/or contraction of a unit of...

Mass is a liquid

60528, 251 11, F03C 500

Patent

active

045355908

ABSTRACT:
The invention relates to a thermal servomotor which includes two operating elements particularly bellows boxes, which act oppositely on a valve actuating bridge. Each operating element has a temperature-dependent filling. Each operating element is connected to a relatively small container having a volume on the order of 0.2 cm.sup.3 by a capillary passage which has the effect of partially thermally insulating each operating element from the associated container. Each container contains the medium of the filling that determines the pressure and separate heating apparatus is associated with each of the two containers.

REFERENCES:
patent: 2322762 (1943-06-01), Malone
patent: 2379124 (1945-06-01), Wasson
patent: 3173245 (1965-03-01), Schutmaat
patent: 3778021 (1973-12-01), Alexander et al.

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