Patent · US Active

Pressure medium-actuated unit

US7866253B2 · kind B2 · utility

6Cited by

7References

11Claims

0Family size

Assignee

ZF FRIEDRICHSHAFEN AG · DE

Inventors

Christian Bottger · Remscheid, DE
Rainer Beilner · Bergrheinfeld, DE
Matthias Reuβ · Arnstein, DE

Key dates

Filing date	Jan 31, 2008
Grant date	Jan 11, 2011
Priority date	—
Expiry date	Mar 7, 2029

Classification

Technology area (CPC F)Mechanical Engineering; Lighting; Heating
CPC primaryF15B15/12
WIPO fieldMechanical elements
WIPO sectorMechanical engineering

Abstract

A pressure-medium actuated swivel motor includes a cylinder with closed ends and an inside surface with a pair of diametrically opposed axially extending ribs, and a motor shaft with a pair of diametrically opposed axially extending vanes, wherein the vanes and the ribs bound first and second pairs of diametrically opposed working chambers between the motor shaft and the cylinder. First and second pressure medium ports are connected to respective first and second pairs of working chambers, each pair being connected by an interconnection channel through the shaft. A movable separating element which divides a compensating space in the piston into a first and second compensating subspaces, wherein the first compensating subspace is connected to the first pair of working chambers, and the second compensating subspace is connected to the second pair of working chambers.

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