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:
Sep. 22, 1998
Filed:
Oct. 17, 1996
Kayaba Kogyo Kabushiki Kaisha, Tokyo, JP;
Abstract
A rotary damper for stabilization of a damping and temperature characteristic without impairing a temperature compensation function and facilitates a lubricating operation. The damper includes a bore for a damping force generating mechanism as a single communication flowpassage and a bore for a temperature compensation mechanism arranged in a line in a casing. The damping force generating mechanism is divided into two sets of damping elements with damping valves and return valves, arranged in series in the communication flowpassage with back surfaces of the damping valves and are oppositely positioned. A portion of the communication flowpassage between the damping valves is communicated with an oil chamber of a temperature compensation mechanism by an oil passage. A side panel is provided with a lubricating port toward the oil chamber of the temperature compensation mechanism. A side oil passage branched from the lubricating port is communicated with one end of the communication flowpassage, and the lubricating port and the side oil passage are simultaneously opened and closed by a cut plug. Seal members fitted in vanes and separating blocks are provided with concave portions for forming projecting lips on the inner and outer peripheral surfaces thereof. The concave portion at an angular portion on the outer peripheral surface is buried to form a flat surface, or the concave portion is formed to be shallow, to lower the height of the projecting lip, and the rigidity in that portion is increased to enhance the wear resistance.