Implements or apparatus for applying pushing or pulling force – Single throw lever – Lazy tongs
Patent
1992-02-21
1993-06-29
Watson, Robert C.
Implements or apparatus for applying pushing or pulling force
Single throw lever
Lazy tongs
B66F 322
Patent
active
052227170
ABSTRACT:
A booster link arm positioning device for position or from a top to bottom position. The link arm is maintained by spring tension in the proper positions by the use of two torsion springs during first and second stage operations. In the second stage the link arm is disengaged from the hydraulic cylinder rollers and is maintained in a vertical position by a blocking bar. Upon lowering the upper frame to its bottom position, the link arm and yoke will re-engage with the hydraulic cylinder rollers at the proper location.
REFERENCES:
patent: 2501001 (1950-03-01), Neely
patent: 3891108 (1975-06-01), Traficant
Tesco Hi-Lift, Inc.
Watson Robert C.
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