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:
Feb. 19, 1991
Filed:
Sep. 14, 1989
Applicant:
Inventor:
John S Payne, Liberty, NC (US);
Assignee:
Volvo GM Heavy Truck Corporation, Greensboro, NC (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
B60G / ;
U.S. Cl.
CPC ...
280 811 ; 2801491 ; 2804051 ; 280704 ; 180 2402 ;
Abstract
An over the highway truck or tractor suspension with traction enhancement. Air springs are provided for the rear axles of a 2.times.6 vehicle. Normally the load is evenly divided between driven and tag axles. When enhanced traction is desired, the tag axle springs are communicated with an auxiliary tank to reduce pressure in them while air under pressure is supplied to the driven axle springs to increase the pressure in them and thereby increase the portion of the load on the driven axle to provide enhanced traction.