Thermo-actuator with lubricant filled seal bag

Details Thermo-actuator with lubricant filled seal bag Thermo-actuator with lubricant filled seal bag

1991-09-05

1993-01-12

Kwon, John T.

Power plants

Pressure fluid source and motor

Methods of operation

374160, F16D 3100, G01K 1100

Patent

active

051779633

ABSTRACT:
A guide member is slidably mounted on a rod, and a resilient seal bag around the rod is secured to the guide member. The rod is inserted in a heat conductive cylinder secured to the guide member, and wax is provided in the heat conductive cylinder. The seal bag has a base portion having an opening, and a bag portion, and is engaged with the rod only at the opening to form a gap between the bag portion and the rod. The gap is charged with lubricating oil. The pressure of the lubricating oil is built up to a value equivalent to the pressure of the wax, thereby holding the bag portion in a floating state. The rod is lifted by the pressure of the lubricating oil.

REFERENCES:
patent: 2913904 (1959-11-01), Baker
patent: 3149455 (1964-09-01), Daly et al.
patent: 3308668 (1967-03-01), Wong
patent: 3397859 (1968-08-01), Barnett
patent: 3407663 (1968-10-01), Vernet
patent: 4016722 (1977-04-01), Niederer, Sr.
patent: 4227412 (1980-10-01), Stratynski et al.
patent: 4235109 (1980-11-01), Williamson
patent: 4337621 (1982-07-01), Lane, Jr. et al.
patent: 4759189 (1988-07-01), Stropkay et al.
patent: 5033865 (1991-07-01), Kuze

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