Implements or apparatus for applying pushing or pulling force – Hoisting truck – Platform type
Patent
1993-07-20
1995-05-30
Watson, Robert C.
Implements or apparatus for applying pushing or pulling force
Hoisting truck
Platform type
254 93H, B66F 324
Patent
active
054195330
ABSTRACT:
A lifting device for lifting heavier loads is disclosed including a square base plate having a plurality of wheels attached in triangular arrangement which provide a low center of gravity for the lifting device. Mounted in the center of the square base plate is a cylindrical housing having a sealed tube within an unsealed tube, a space between the tubes, a fluid holding chamber, a fluid filed chamber, a fluid filled space, a plurality of hydraulic seals, an orifice between the fluid filled space and the fluid holding chamber, a plurality of orifices in the bottom aspect of the fluid holding chamber and a plurality of external connections, an orifice in the top aspect of the fluid holding chamber between the fluid holding chamber and the operating chamber, a tube in the fluid holding chamber for transferring pressurized hydraulic fluid to the operating chamber, and a piston assembly having an operating chamber which is slidable longitudinally in the cylindrical housing. A reservoir chamber for hydraulic fluid is provided. A plurality of gussets attach to the support base, secure the cylindrical housing, and attach to a support collar. A support tube is attached to the support base and surrounds the lower portion of the cylindrical housing. Means are provided for activating the piston assembly. A locking mechanism which circumscribes, engages and secures the piston assembly is provided as well as means of engaging and disengaging the locking mechanism. A control means for operating the lifting device is included.
REFERENCES:
patent: 2664073 (1953-12-01), Pine
patent: 3047269 (1962-07-01), Renshaw
patent: 5000424 (1991-03-01), Inoue
Barta Allen
Stark Vic
BFJ Company
Guenther Jerry D.
Watson Robert C.
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