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:
Dec. 29, 1992
Filed:
Dec. 20, 1991
Adolf H Martin, Glenview, IL (US);
Inventio AG, Hergiswil, CH;
Abstract
A guide bar for an elevator door includes a beam having a plurality of attachment apertures formed therein for the attachment of a guide, sliding or roller. The apertures are arranged in a staggered pattern providing for numerous adjustment possibilities for the guide to accommodate variations between the door and a guide track for the door. The guide is attached to a first horizontal web of the beam and extends into a groove mortised into the door sill, whereby the elevator door is guided at the lower end along a predetermined sliding track. Each aperture is formed from three overlapping circular recesses, the center points of which form an isosceles triangles such that bolt heads of fasteners are supported on at least two thirds of their circumference by the first web. The center points of the recesses of the apertures are staggered with respect to the center points of each of the other recesses in a direction transverse of the first web by a step width to provide a plurality of adjustment possibilities.