Expansible chamber devices – With inspection window in expansible chamber wall portion – With lock
Patent
1974-04-15
1976-10-19
Schwadron, Martin P.
Expansible chamber devices
With inspection window in expansible chamber wall portion
With lock
60416, 60418, 91 1, 91420, 92 60, 92106, 279 4, F01B 2526, F01B 3112, F15B 1108, F15B 13042
Patent
active
039864375
ABSTRACT:
A double-acting rotary hydraulic jack having two jack compartments, comprising a rotary hydraulic joint for the supply of hydraulic liquid to and the evacuation of hydraulic liquid from the compartments. The two compartments of the jack each communicate with at least one axial boring in a rotary part of the jack which is not axially movable. In this boring a movable piston bears against the head of a guide rod for a spring which itself bears against the rotary part of the jack. The ends of the rods, externally of the borings, are secured to a member coaxial with the jack, for example a sleeve, whose axial position is monitored by a displacement detector, so as to give an indication of the working pressure in the active jack compartment.
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patent: 3892165 (1975-07-01), Lioux
Flocks Karl W.
Hershkovitz Abraham
La Precision Industrielle
Schwadron Martin P.
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