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:
Mar. 16, 1999
Filed:
Dec. 06, 1996
Applicant:
Inventors:
Hiroshi Yabe, Shizuoka-ken, JP;
Shiro Takeuchi, Shizuoka-ken, JP;
Assignee:
NSK-Warner K.K., Tokyo, JP;
Primary Examiner:
Int. Cl.
CPC ...
F16D / ;
U.S. Cl.
CPC ...
464 64 ; 192203 ; 267168 ; 464 66 ;
Abstract
A spring damper device includes cylindrical outer coil springs and inner springs inserted in the outer coil springs, respectively. The cylindrical outer coil springs are held in the form of arcs of a circle at angular intervals therebetween by a retainer plate, whereas the inner springs have a length shorter than the outer coil springs so that the inner springs are actuated a predetermined angle later compared with their corresponding outer coil springs. Each of the inner springs has a diameter smaller at opposite end portions thereof than at a central portion thereof.