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:
Jun. 23, 1981
Filed:
Mar. 30, 1979
Tetuo Kato, Musashino, JP;
Ieaki Miura, Yokohama, JP;
Tokico, Ltd., Kawasaki, JP;
Abstract
A hydraulic shock absorber of the type including a tubular main body having of an inner tube containing oil and slidably receiving a piston and an outer tube surrounding the inner tube to define around the inner tube an annular reservoir chamber containing therein pressurized gas in the upper portion and oil in the lower portion. A rod guide closes the upper end of the inner tube, and a piston rod is secured to the piston and slidably extends through the rod guide and through a seal member closing the upper end of the main body. A spring is disposed between the rod guide and the seal member and acts on the seal member through an annular retainer to urge the seal member against the inner surface of the main body, wherein, there are mounted on the annular retainer an annular valve member having a lip portion for engaging with the rod guide to prevent fluid flow from the upper portion of the reservoir chamber to the interior of the inner tube through a clearance between the rod guide and the piston rod but allowing fluid flow in the opposite direction. An annular valve member is provided having a lip portion engaging with the inner surface of the main body to prevent fluid flow from the interior of the main body to the outside of the main body along the inner surface of the main body but allowing fluid flow in the opposite direction.