Expansible chamber devices – With inspection window in expansible chamber wall portion – With lock
Patent
1992-09-21
1994-04-05
Look, Edward K.
Expansible chamber devices
With inspection window in expansible chamber wall portion
With lock
92 31, 92 88, 92110, 92117A, 92165R, 92165PR, F16J 1518, F01B 2526, F01B 1502
Patent
active
052994899
ABSTRACT:
A pressure cylinder in which the piston is hollow and the pressurized fluid is introduced into the hollow of the piston. The cylinder housing includes a core member with supply and exhaust ports. An area between the rear wall of the housing and a rear wall of the piston is exposed to atmospheric pressure at all times, elliminating a need for seals on the outside surface of the piston, and allowing for the piston to be exposed to large transverse forces. Proximity switches are provided in a slot in the upper wall of the cylinder housing to detect the arrival of the piston at its limit positions and a pin secured to the cylinder housing engages a slot in the outer periphery of the piston to guide the forward and rearward movement of the piston within the cylinder. A slot may be provided in the upper wall of the cylinder housing for receipt of a work positioning member secured to the outer periphery of the piston.
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Obrecht Robert E.
Waltonen Edward J.
Look Edward K.
REO Hydraulic Pierce & Form
Ryznic John
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