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:
Aug. 15, 1989
Filed:
Mar. 01, 1988
Tsutomu Oshida, Yokohama, JP;
Nifco Inc., Yokohama, JP;
Abstract
A cylinder type damper device for damping the opening and closing movement of a storage box includes a cylinder member enclosing air therein, an end cap with a filter therein and a rod reciprocally movably inserted into the cylinder member and provided at its front end with a piston for dividing the interior of the cylinder member into a head chamber and a rod chamber. The rod is moved in association with an opening or closing movement of the storage box. The piston has an orifice formed throughout its entire length in the axial direction thereof and being for interchanging air in the head and rod chambers by the axial movement thereof and also has air holes formed likewise throughout its entire length in the axial direction thereof and provided with a check valve for blocking the interchanging of air between the head and rod chambers in accordance with one directional movement in the axial direction of the piston.