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:
Feb. 13, 1996
Filed:
Jun. 28, 1994
Robert M Stone, Tucson, AZ (US);
Bishamon Industries Corporation, Ontario, CA (US);
Abstract
A self-adjusting pneumatic load elevator is adapted for mounting in a pit so that it can be used with pallet trucks. The elevator has a base, a rotatable, horizontal load platform, a vertically expandable scissors linkage mechanically coupled between the load platform and the base, and an air actuator chamber. To accommodate a rectangular pit opening, the load platform has a circular, rotatable portion surrounded by a rectangular, non-rotatable transition frame which fits with small clearance in the pit opening. An automatic brake prevents the rotation of the load platform when it is flush with the floor, and lightweight, vertically movable skirts on the load platform can strike a worker's toe to warn of danger. To prevent dangerous rebounds, when the elevator fully descends, it automatically releases the air in the air actuator chamber.