Patent · US Active

Lift assembly systems and methods

US10227221B2 · kind B2 · utility

3Cited by

22References

20Claims

0Family size

Assignee

Electronic Theatre Controls, Inc. · US

Inventors

Donald A. Hoffend, III · Winston-Salem, US
William R. Florac · Verona, US
Michael Lichter · Holzkirchen, DE
Edwin W. Bolz · Queensbury, US

Key dates

Filing date	Jun 23, 2015
Grant date	Mar 12, 2019
Priority date	—
Expiry date	Jul 29, 2037

Classification

Technology area (CPC G)Physics
CPC primaryG01L5/107
WIPO fieldHandling
WIPO sectorMechanical engineering

Abstract

A lift assembly includes an article to be lifted between a lowered position and a raised position, a drive element coupled to the article, a power mechanism coupled to the drive element, and a power transfer mechanism coupled between the power mechanism and the drive element. The power transfer mechanism includes control electronics having a first upward limit switch adapted to deactivate the power mechanism when the article is lifted to a first upward height, and a second upward limit switch adapted to deactivate the power mechanism when the article is lifted to a second upward height higher than the first upward height.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.