Patent · US Expired

Sealing for machine elements which move back and forth

US4284280A · kind A · utility

26Cited by

5References

6Claims

0Family size

Assignee

O & K Orenstein & Koppel Aktiengesellschaft and Lorenz GmbH · DE

Inventors

Claus Bertram · Waltrop, DE
Georg Lorenz · Burgwedel, DE

Key dates

Filing date	Oct 19, 1979
Grant date	Aug 18, 1981
Priority date	—
Expiry date	Oct 19, 1999

Classification

Technology area (CPC Y)Emerging Cross-Sectional Technologies
CPC primaryY10S277/926
WIPO fieldMechanical elements
WIPO sectorMechanical engineering

Abstract

A sealing for back and forth moving machine elements, particularly for the sealing of rods for hydraulic cylinders, with a seal which seals against the housing as well as against the axially back and forth moving machine part, a preceding protection element which is arranged between the seal and the pressurized chamber of the cylinder, and a stripper, which stripper is turned toward the atmosphere. The preceding protection element is provided with a lip, the lip being directed toward the oil pressurized chamber, which lip touches the back and forth moving piston rod and has openings, which openings produce a connection between the pressurized oil chamber and that oil chamber which is formed between the preceding protection element and the lip seal.

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