Patent · US Active

Worm gear drive

US8051737B2 · kind B2 · utility

5Cited by

4References

12Claims

0Family size

Assignee

JOHNSON ELECTRIC S.A. · CH

Inventors

Feng Li · Rochester, US
Jing Ning Ta · Hong Kong, CN

Key dates

Filing date	Oct 10, 2007
Grant date	Nov 8, 2011
Priority date	—
Expiry date	Apr 4, 2029

Classification

Technology area (CPC Y)Emerging Cross-Sectional Technologies
CPC primaryY10T74/19828
WIPO fieldMechanical elements
WIPO sectorMechanical engineering

Abstract

A worm gear drive has a self locking gear train. The gear train comprises a worm 34 fitted to a motor shaft 32 and in mesh with a worm wheel 35 which drives the output 26. The motor shaft 32 extends between two thrust bearings 29, 60 having faces 54 which contact respective axial ends of the motor shaft 32. The contact between at least one of the thrust bearings 29 and the shaft 32 is adapted to provide a high frictional force.

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