Temperature-compensating hydraulic positioner

Details Temperature-compensating hydraulic positioner Temperature-compensating hydraulic positioner

1985-12-31

1988-11-22

Garrett, Robert E.

Brakes

Internal-resistance motion retarder

With means for locking parts together temporarily

188276, 92 1, F16F 952

Patent

active

047859210

ABSTRACT:
In a hydraulic positioning device a piston divides the cavity within a cylinder into two working chambers. The piston is connected with a piston rod passing through one end of the device and with a volume compensating rod through the other end of the device. The piston rod is provided with a passage which can be opened and closed by a valve so as to allow optional adjustment and blocking of the piston rod. The hydraulic liquid within the working chambers is subjected to volume variation in response to varying temperatures. With the aim of compensating such volume variations a partition at one end of the cylinder is supported by an abutment of the cylinder through an axially deformable compensating body having preferably a deformation force--deformation path characteristic which is responsive to temperature.

REFERENCES:
patent: 3060895 (1962-10-01), Acker et al.
patent: 3828651 (1974-08-01), Dorner et al.
patent: 3893377 (1975-07-01), Mannetje
patent: 4099602 (1978-07-01), Kourbetsos
patent: 4513953 (1985-04-01), Molders et al.

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