The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jul. 12, 1988
Filed:
Mar. 03, 1987
Applicant:
Inventors:
Richard L Unger, Pittsburgh, PA (US);
Thomas G Bobick, Pittsburgh, PA (US);
Assignee:
United States of America as represented by the Secretary of the Interior, Washington, DC (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
B66F / ;
U.S. Cl.
CPC ...
254 / ;
Abstract
A mobile jack, particularly for use in installation of support beams in urground mines, is disclosed. The jack comprises a wheel-mounted frame and a hydraulic lifting arm having a jack head which is horizontally rotatable 360.degree.. The lifting arm is also longitudinally positionable along the length of the mobile jack. The lifting arm is manually raised and lowered by pumping a lever connected to a hydraulic jack cylinder.