Patent · US Expired

Adjustable length strut and tractor linkage

US4865134A · kind A · utility

11Cited by

1References

8Claims

0Family size

Assignee

Jean Walterscheid GmbH · DE

Inventors

Hermann Rugen · Meppen, DE
Alfred Frackenpohl · Lohmar, DE
Paul Herchenbach · Ruppichteroth, DE

Key dates

Filing date	Jul 5, 1988
Grant date	Sep 12, 1989
Priority date	—
Expiry date	Jul 5, 2008

Classification

Technology area (CPC A)Human Necessities
CPC primaryA01B59/041
WIPO fieldOther special machines
WIPO sectorMechanical engineering

Abstract

An adjustable length strut 24 for laterally supporting each lower steering arm 12, 14 of a three point linkage on an agricultural tractor comprises a sleeve 26 within which a shaft is telescopically slidable, the two parts being biased inwardly towards one another by a tension spring 40. The shaft 28 is provided with axially spaced through bores 52, 54, 56 each alignable with a corresponding through bore 58, 60 or 62 in the sleeve 26. The longitudinal axes of each alignable set of bores extends at different angles of inclination to one another whereby a locking pin 64 may only be insertable through one specific set of aligned bores.

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