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:
Mar. 06, 2018
Filed:
Nov. 20, 2014
Electronic Theatre Controls, Inc., Middleton, WI (US);
Donald A. Hoffend, III, Annandale, VA (US);
Electronic Theatre Controls, Inc., Middleton, WI (US);
Abstract
A lift assembly comprises a base, a drive mechanism, first and second flexible drive elements driven by the drive mechanism, first and second sheaves directing the first and second drive elements in different directions, and first and second load cells sensing load on the first and second sheaves. The sheaves can be mounted to first and second sheave mounts, and the load cells can sense load on the first and second sheave mounts. The sheave mounts can be provided on first and second sheave plates, and bearings can be positioned under the first and second sheave plates. The lift assembly can further comprise first and second sheave brackets for coupling the first and second sheaves to the first and second sheave mounts. The first sheave plate can further include an opening, and at least a portion of the second sheave bracket can be positioned in the opening.