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:
Oct. 22, 1991
Filed:
Jun. 18, 1990
William J Hicks, Muskegon, MI (US);
Lear Siegler Truck Products Corp., Muskegon, MI (US);
Abstract
An improved lift mechanism is provided in an air spring trailing arm suspension comprising control arms pivotally mounted to a frame and adapted to carry ground-engaging wheels. An air spring is mounted between the control arms and the frame. A plate member mounted for vertical displacement on guide rods secured to the frame carries an upper portion of the air spacing so that the air spring can be vertically displaced relative to the frame. A lower portion of the air spring engages a piston which is kept in a generally upwardly facing orientation by a parallelogram linkage. A ratchet and pawl mechanism locks the control arms in the retracted position, and a latch mechanism locks the plate member to the frame when the plate member is vertically displaced to a lower limit of vertical movement.