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:
Nov. 17, 1987
Filed:
May. 22, 1985
Bruce S Johnson, Dallastown, PA (US);
Harsco Corporation, Wormleysburg, PA (US);
Abstract
A portable folding bridge crane comprises a power unit having a folding tongue assembly for enabling the unit to be towed as a trailer by a vehicle, a crane rail assembly carrying a movable bridge crane thereon, a pair of support members pivotally connected to the unit and to an intermediate location of the rail assembly, first hydraulic actuators for pivoting the support members with respect to the unit to raise and lower the rail assembly, second hydraulic actuators for simultaneously pivoting the rail assembly with respect to the support members to maintain the rail assembly horizontal, and a pair of legs pivotally supported at the front of the rail assembly for movement between a stowed position at which the legs lie adjacent to the rail assembly and an operating position at which the legs are extended to engage the ground. Upon being erected, the rail assembly is supported by the front legs and by the support members connected to the power unit, and the tongue assembly is folded against the power unit to enable vehicles to be driven sideways beneath the rail assembly and the movable bridge crane to be employed for transferring loads to and from the vehicles.