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:
May. 20, 1980
Filed:
Nov. 29, 1978
Honda Giken Kogyo Kabushiki Kaisha, Tokyo, JP;
Abstract
A hydraulic shock absorber of the type having a cylinder and a piston with axial passages therethrough. The piston is mounted to slide within the cylinder. Valve plates having orifices therethrough are provided to control flow through the axial passages of the piston. Certain of the valve plates are situated to operate together with a variable effective orifice on the downstream side of the axial passages and to act with a fixed effective orifice as check valve plates when the flow is reversed. The composite valve thus defined offers a smooth and properly sloping velocity-resistance curve. The shock absorber also includes a foot valve assembly controlling flow between the interior of the cylinder and an annular oil reservoir outside the cylinder. The foot valve assembly may have two check valves for controlling flow through two sets of foot valve passages or it may employ a check valve spring which changes from a 'V' shape to a flat shape to cover orifices in a check valve plate.