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. 10, 1997
Filed:
Jan. 31, 1996
Applicant:
Inventors:
Hideaki Nakamura, Atsugi, JP;
Toshiro Ichikawa, Hiratsuka, JP;
Assignee:
Unisia Jecs Corporation, Atsugi, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
F16H / ;
U.S. Cl.
CPC ...
475301 ; 475317 ;
Abstract
A power transmission comprises a first coil spring wound to a casing and a first drum and having the diameter to be extended by rotation of an internal gear in one direction, a second coil spring wound to the casing and a second drum and having the same winding direction as the first coil spring and the diameter to be extended by rotation of the internal gear in the other direction, and cylinder members arranged on outer peripheries of the first and second coil springs for serving to restrict extension of the diameter of the first and second coil springs, the cylinder members being rotatable relative to the internal gear.