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. 21, 1998
Filed:
Jan. 25, 1996
Zersis M Mehta, Hialeah, FL (US);
Robert M Stone, Tucson, AZ (US);
ECOA Hydraulic Lifts, Inc., Hialeah, FL (US);
Abstract
A device for stacking and unstacking loads has a base made up of an upright housing and a pair of spaced, parallel outriggers extending from the housing. Vertical guide rods are mounted on the exterior of the housing, and a platform assembly is movable up-and-down on the guide rods. In its lowermost position, the platform assembly sits on the ground between the outriggers. The platform assembly comprises a carrier, a platform on the carrier having a circular opening, a turntable mounted on the carrier within the opening, and a braking system for the turntable. The platform is movable up-and-down with respect to the turntable. When the platform assembly is in a raised position, the platform is located below the turntable and the braking system is disengaged. The platform rises to the level of the turntable, and the braking system engages, in response to arrival of the platform assembly at ground level. The platform automatically sinks below the turntable, and the braking system is automatically disengaged, as the platform assembly is raised. The platform assembly is driven by a cylinder-and-piston unit which is disposed inside the housing and engages the periphery of the assembly through a slot in a wall of the housing. The cylinder-and-piston unit is extended and retracted by a power unit consisting of a motor, pump and tank likewise disposed inside the housing.