Patent · US Expired

Drive device

US7014028B2 · kind B2 · utility

4Cited by

10References

16Claims

0Family size

Assignee

ZF FRIEDRICHSHAFEN AG · DE

Inventors

Gerhard Buck · Friedrichshafen, DE
Helmut Eymuller · Friedrichshafen, DE
Siegfried Stutzle · Friedrichshafen, DE

Key dates

Filing date	Aug 30, 2002
Grant date	Mar 21, 2006
Priority date	—
Expiry date	Oct 6, 2022

Classification

Technology area (CPC F)Mechanical Engineering; Lighting; Heating
CPC primaryF16H2063/3036
WIPO fieldMechanical elements
WIPO sectorMechanical engineering

Abstract

A drive device comprises a first switchgear (9) and a second switchgear (11) which can be actuated respectively hydraulic pressure in an opening direction and via spring force in a closing direction, and which are provided with a device (26) by which the first switchgear (9) and the second switchgear (11) are to be actuated in the opening direction when the switchgears are actuated in the closing direction.

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