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. 23, 1982
Filed:
Mar. 11, 1980
Max J Dechantsreiter, Milwaukee, WI (US);
Harnischfeger Corporation, West Milwaukee, WI (US);
Abstract
A stacker crane having an elevated trolley on which there is a hoist, a load member beneath the trolley is moved vertically by the hoist and is guided by a mast comprising a vertically fixed inner member projecting down from the trolley and an intermediate member telescopingly slidable on the inner member. In one locking position of a toggle element swingably carried by the intermediate member it engages an upwardly facing surface of a ledge on the load member, constraining the intermediate member to move with the load member in a lower part of the range of vertical motion of the load member; in the upper part of that range the toggle element, in an opposite locking position, engages an upwardly facing surface on a ledge on the inner member so that the latter supports the intermediate member. The position of the toggle element is controlled by a pair of latching elements carried by the intermediate member at opposite sides of the toggle element, each movable up and down relative to the intermediate member and biased up to a latching position holding the toggle element in one locking position; but each latching element can move to its latching position only when the other is out of that position. The latching elements are displaced out of their respective latching positions by a dog on each, each dog engageable with a downwardly facing surface on one of the ledges.