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:
Jan. 17, 1989
Filed:
Aug. 12, 1987
Nolan W Cummins, Bristow, OK (US);
Unit Rig & Equipment Co., Tulsa, OK (US);
Abstract
A suspension system for a vehicle in which each suspension system at each wheel has a dual spring rate. An external accumulator is used in connection with the main oil/gas strut but is charged to a higher initial pressure than the pressure of the main strut. Thus, the external accumulator has no effect until the load on the vehicle reaches a predetermined amount. At this time, the external accumulator becomes effective and the total suspension system, including the strut assembly and the accumulator, produces a different spring rate function. In another embodiment load equalization between two rear wheels is obtained by a connecting conduit connecting the oil chambers of the two oil/gas strut systems.