Brakes – Internal-resistance motion retarder – Having a thrust member with a variable volume chamber
Patent
1990-09-10
1992-02-04
Nilson, Robert G.
Brakes
Internal-resistance motion retarder
Having a thrust member with a variable volume chamber
188306, 188310, 188315, 1374938, 138 31, F01C 900
Patent
active
050852981
ABSTRACT:
There is disclosed a hydraulic fluid regulator for automatically supplying hydraulic fluid to the pressure chamber of a rotary torque resistance actuator to replace fluid which may move out of the pressure chamber of the actuator when the fluid is heated and expands. The regulator includes a pneumatically pressurized fluid supply reservoir connected to the pressure chamber in the actuator by two parallel conduits respectively having spring loaded check valves therein connected in opposite directions to supply fluid to the chamber when the pressure in the chamber falls below a preset value and to transmit fluid from the chamber to the reservoir when the pressure in the pressure chamber exceeds a different preset value. The reservoir also includes a third bypass conduit connected in parallel with the first two conduits for metering fluid from the actuator chamber when the fluid expands, and a filter is connected in line with the three conduits.
REFERENCES:
patent: 3062330 (1962-11-01), Lyon
patent: 4061320 (1977-12-01), Warner
patent: 4695226 (1987-09-01), Marchitto
patent: 4823678 (1989-04-01), Sollami
patent: 4941554 (1990-07-01), Sollami
Nilson Robert G.
Patnaude Edmond T.
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