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. 03, 1976
Filed:
Jun. 21, 1974
Paul G McKinnon, Brigham City, UT (US);
Tropic Industries, Inc., Salt Lake City, UT (US);
Abstract
A load-levelling shock absorber unit including a guide piston and piston rod and a first surrounding ride control cylinder, one of which is adapted to be connected to a first sprung mass and the other of which is adapted to be connected to an unsprung mass; an oil reservoir cylinder surrounding the ride control cylinder; and an expansible lift cylinder. The ride control, oil reservoir and lift cylinders are all preferably concentrically arranged and are of the hydraulic type. The piston rod reciprocates within the ride control cylinder and, so long as the piston is centrally positioned within the first cylinder, a lagged control valve does not displace sufficiently to allow repositioning of the outer wall of the lift cylinder. Movement of the piston beyond a predetermined central portion for a predetermined time period will move the control valve such that further reciprocation of the piston rod will reposition the outer wall of the lift cylinder so that a spring attached thereto and to one of the masses is moved within the first cylinder, until the over-all shock absorber length is substantially re-established.