Patent · US Active

Piston-cylinder unit with piston rod protector

US8418821B2 · kind B2 · utility

6Cited by

4References

1Claims

0Family size

Assignee

ZF FRIEDRICHSHAFEN AG · DE

Inventors

Robert Henneberg · Ilmenau, DE
Frank Partosch · Zeil am Main, DE
Simon Strack · Bamberg, DE
Andreas Zietsch · Röthlein, DE

Key dates

Filing date	Dec 10, 2008
Grant date	Apr 16, 2013
Priority date	—
Expiry date	Jan 21, 2030

Classification

Technology area (CPC B)Performing Operations; Transporting
CPC primaryB60G2206/91
WIPO fieldTransport
WIPO sectorMechanical engineering

Abstract

Piston-cylinder unit includes a piston rod guided with freedom of axial movement in a cylinder, where at least part of the piston rod is enclosed by a piston rod protector, which is designed with at least limited axial elasticity. At least one retaining surface of the piston rod protector enters into a positive connection with at least one stop surface on the cylinder side, and an auxiliary assembly bevel allows the piston rod protector to buckle over a certain stroke range of the piston rod during the installation of the protector, so that the retaining surface snap-locks onto the stop surface on the cylinder side.

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