Patent · US Active

Hydrostatic clutch actuator

US8490391B2 · kind B2 · utility

7Cited by

6References

12Claims

0Family size

Assignee

Schaeffler Technologies AG & Co. KG · DE

Inventors

Viktor Franz · Karlsruhe, DE
Matthias Ehrlich · Laufenburg (Baden), DE
Norbert Esly · Schömberg, DE

Key dates

Filing date	Apr 27, 2012
Grant date	Jul 23, 2013
Priority date	—
Expiry date	Apr 27, 2032

Classification

Technology area (CPC H)Electricity
CPC primaryH02K17/32
WIPO fieldElectrical machinery, apparatus, energy
WIPO sectorElectrical engineering

Abstract

The invention relates to a hydrostatic actuator, having a master cylinder including a housing and a piston, which is axially mountable in the housing and which pressurizes a pressure chamber filled with pressure medium, a planetary rolling-contact gear system that converts a rotary drive into an axial motion and that has a sleeve, a gear-driven spindle, and planetary rolling elements that roll therebetween, and an electric motor that drives the planetary rolling-contact gear system and that has a stator rigidly connected to a housing and a rotor that can be rotated relative to the stator. In order to optimize the installation space, the pressure chamber is annular and the planetary rolling-contact gear system is arranged radially within the pressure chamber.

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