Patents Assigned to Arkansas Precision Hydraulics, Inc.
  • Patent number: 4691617
    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.
    Type: Grant
    Filed: February 14, 1986
    Date of Patent: September 8, 1987
    Assignee: Arkansas Precision Hydraulics, Inc.
    Inventor: Hans D. Purkott