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:
Jul. 06, 1976
Filed:
Nov. 21, 1974
Quinton Healey Carlton, Leamington Spa, EN;
Oleo International Holdings Limited, Leamington Spa, EN;
Abstract
A liquid damper comprises a piston head which slides within a cylinder and which is carried by a piston rod which slides within an annular gland at one end of the cylinder. A passage which includes a damping valve connects the annular cylinder space to a liquid reservoir so that liquid displaced from the annular cylinder space by movement of the piston in either direction is fed through the damping valve to the liquid reservoir. The liquid reservoir is connected to the other cylinder space through a non-return valve. A groove which varies in area along its length, extends partway along the piston rod. When the groove extends through the annular gland, some of the liquid displaced from the annular cylinder space is directed to the reservoir which surrounds the cylinder through the groove which thereby functions as a by-pass around the damping valve for that liquid so that the damping characteristics of the damper, which are related to the resistance to flow through the damping valve that is offered by that valve, is dependent upon the position of the piston head within the cylinder. The piston rod is connected to the outer wall of the reservoir by a convoluted bellows and a radially deformable annular membrane. The groove may be helical and may be one of a number of such grooves.