Implements or apparatus for applying pushing or pulling force – Hoisting truck – Single throw lever
Patent
1980-07-18
1982-11-16
Watson, Robert C.
Implements or apparatus for applying pushing or pulling force
Hoisting truck
Single throw lever
417510, B60P 148
Patent
active
043592058
ABSTRACT:
Portable hydraulically operating lifting apparatus including a wheel mounted chassis, a mounting base supported on the chassis and defining first and second pivot mounting locations and a cylinder pivot mounting location, the cylinder pivot mounting location being below the first and second pivot mounting locations, a raisable element defining a planar supporting surface, first and second support elements pivotably coupled to the first and second pivot mounting locations respectively and to the raisable element, a hydraulically operated cylinder pivotably coupled to the cylinder pivot mounting location and to the raisable element and apparatus for providing a pressurized flow of hydraulic fluid to the cylinder. The apparatus is constructed for maintaining the raisable element substantially horizontal throughout its range of dispositions and for maintaining the hydraulic pressure in the cylinder substantially constant throughout the range of dispositions.
REFERENCES:
patent: 1265240 (1918-05-01), Myers
patent: 1280472 (1918-10-01), Hopkins
patent: 1819378 (1931-08-01), Nilson
patent: 2136636 (1938-11-01), Rotter
Amster Micha
Shadmi Gideon
Taamal Mizra
Watson Robert C.
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