The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Apr. 13, 1982
Filed:
Mar. 17, 1980
Sixten A Johansson, Eskilstuna, SE;
Volvo BM AB, Eskilstuna, SE;
Abstract
A vehicle such as a dumper with articulated steering has a load-carrying portion supported by two wheel-pairs mounted on bogies. One wheel-pair can be raised from the ground while the other, still on the ground, has softer suspension. In a vehicle with its two portions relatively swingable around a longitudinal axis, the two wheels on the ground are coupled so as to move relatively identically in relation to the vehicle frame. With one wheel-pair raised and the other suspended, the vehicle is still laterally stable. Spring suspension is obtained by tipping the bogies using a mechanism actuated by a hydraulic cylinder with a gas accumulator attached to the feeder line of the hydraulic cylinder. Gas spring suspension thus occurs only when one wheel-pair is raised.