Hydraulic staging jack

Details Hydraulic staging jack Hydraulic staging jack

1997-09-16

2000-12-05

Scherbel, David A.

Implements or apparatus for applying pushing or pulling force

Fluid pressure

Vehicle attached

254100, B66F 324

Patent

active

061555363

ABSTRACT:
A hydraulic staging jack has a circumferentially grooved cylinder which fits into a base in which two shoes are seated and each shoe has two axially spaced flanges which engage in two axially spaced grooves of the cylinder. Radially outer surfaces of the shoes are axially angled so that moving the shoes axially out of the base causes the shoes to separate radially, thereby disengaging the flanges from the grooves and permitting adjustable axial fixing of the position of the cylinder relative to the base.

REFERENCES:
patent: 3709467 (1973-01-01), Mann
patent: 3871619 (1975-03-01), Simon
patent: 4572481 (1986-02-01), Chambers
patent: 5013190 (1991-05-01), Green
Applicant's Exhibit A--Jahns Structure Jacking Systems, Inc., P.O. Box J. Elburn,IL 60119; 14-page brochure, undated, admitted prior art.
Applicant's Exhibit B--Jahns Structure Jacking Systems, Inc., P.O. Box J. Elburn,IL 60119; 2-page flyer, undated, admitted prior art.

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