Patent · US Active

Locking mechanism for motorized lifting device

US9637360B2 · kind B2 · utility

4Cited by

37References

15Claims

0Family size

Inventors

David R. Hall · Provo, US
Jerome Miles · Spanish Fork, US
Daniel Madsen · Bunker, US
Ben Taylor · Provo, US

Key dates

Filing date	Apr 4, 2014
Grant date	May 2, 2017
Priority date	—
Expiry date	Nov 16, 2034

Classification

Technology area (CPC B)Performing Operations; Transporting
CPC primaryB66D5/30
WIPO fieldHandling
WIPO sectorMechanical engineering

Abstract

An apparatus includes a drum to draw in or let out a line and a motor and transmission coupled to the drum to apply a torque thereto. The transmission includes at least one stage of gearing to reduce a gear ratio of the motor relative to the drum. A shaft couples the motor to the transmission and a locking mechanism selectively locks the shaft to prevent rotation of the drum. In certain embodiments, a braking mechanism may be provided in addition to the locking mechanism to slow the motor when the motor is not applying torque to the drum. This may slow the motor sufficiently to enable engagement of the locking mechanism.

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