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:
Nov. 10, 1992
Filed:
Jun. 06, 1991
Henry M Anderson, Jr, Belding, MI (US);
Hadley Products, division of Nelson Metal Products, Corp., Grandville, MI (US);
Abstract
A leveling valve for controlling the amount of air within an air spring for maintaining a constant level of a vehicle chassis or frame relative to its axles. The valve includes an elongated body in which a uniquely constructed actuating mechanism is located at one end and a valve means at the other end with a dampener and a pilot-operated means located therebetween. An elongated plunger extends from the actuating means to the valve means through the dampener and the pilot-operated dump means. The actuating mechanism at one end of the plunger includes a sleeve slidable on the plunger and biased at each end by coil springs for maintaining the neutral position of the plunger and valve means. The springs permit over-travel of the actuating mechanism when the plunger reaches its limit of travel and also assists a dump piston in overriding the actuating mechanism.