Motors: expansible chamber type – Extension of unit having separately controlled working... – Vane
Patent
1986-02-14
1987-09-08
Garrett, Robert E.
Motors: expansible chamber type
Extension of unit having separately controlled working...
Vane
91525, 91535, 92 53, 92 66, F15B 1118, F01B 720
Patent
active
046916172
ABSTRACT:
A triple action, multi-segment, telescoping hydraulic ram comprising a plurality of coaxially nested, extensible cylinders adapted to be selectively extended or retracted, and a pair of lower diameter, sweep cycle cylinders adapted to be operated independently of the larger cylinders. The ram is ideal for the garbage reception area defined within the cargo area of conventional garbage trucks, for operating the compression platen for moving and compacting garbage. A terminal pin eye associated with the smaller sweep cycle cylinder may be coupled to a stationary support to rigidly brace the ram. Full extension and "sweep cycle" operation is effectuated through various input passageways defined in the pin eye through which high pressure hydraulic fluid is inputted to the ram in conjunction with various annular transmittal passageways to effectuate cylinder operation. A plurality of generally coaxial, reduced diameter internal tubes which are concentric with the operable cylinders provide a means of bridging the sweep cycle cylinders to the others. An internal retract tube, a coaxially centered piston center tube, and an internal piston slider tube which floats within the apparatus and communicates between the piston center tube and a spaced apart stationary feeder tube function to effectuate the sweep cycle phenomena of the instant cylinder, and prevent sweep cycle operation during the normal extension cycle.
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Arkansas Precision Hydraulics, Inc.
Carver Stephen D.
Garrett Robert E.
Williamson Mark A.
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