Patent · US Expired

Double-acting rotary drive for a control device

US4780785A · kind A · utility

9Cited by

3References

33Claims

0Family size

Assignee

Siemens Aktiengesellschaft · DE

Inventors

Hans-Peter Schabert
Erwin Laurer
Erich Strickroth · Buckenhof, DE
Roland Lippert · Bad Mergentheim, DE

Key dates

Filing date	Jun 1, 1987
Grant date	Oct 25, 1988
Priority date	—
Expiry date	Jun 1, 2007

Classification

Technology area (CPC Y)Emerging Cross-Sectional Technologies
CPC primaryY10T74/19274
WIPO fieldMechanical elements
WIPO sectorMechanical engineering

Abstract

A double-acting rotary drive for a control device having an end position fixed in the form of a stop, includes a motor, a torque-changing gear connected to the motor, a driver associated with the torque-changing gear for neutralizing a torque-increasing action of the torque-changing gear or switching on a torque-lowering action after the torque-changing gear rotates through a portion of a total given rotational path thereof, a return travel lock for locking the torque-changing gear in place being released before the driver becomes operative.

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