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.

Date of Patent:
May. 22, 2012

Filed:

May. 14, 2009
Applicants:

Kenta Kohigashi, Wako, JP;

Tomoaki Ishikawa, Wako, JP;

Keiji Iino, Wako, JP;

Tomokazu Kimura, Wako, JP;

Nobuyuki Hirose, Wako, JP;

Inventors:

Kenta Kohigashi, Wako, JP;

Tomoaki Ishikawa, Wako, JP;

Keiji Iino, Wako, JP;

Tomokazu Kimura, Wako, JP;

Nobuyuki Hirose, Wako, JP;

Assignee:
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
F16H 9/00 (2006.01); F16H 59/00 (2006.01); F16H 61/00 (2006.01); F16H 63/00 (2006.01); F16H 7/00 (2006.01);
U.S. Cl.
CPC ...
Abstract

A power transmission device is capable of switching the rotation direction of a drive shaft between positive rotation and negative rotation as power is transmitted to the drive shaft from a drive source via the power transmission device. To cause positive rotation of the drive shaft, only the positive rotation belt is tensed by the belt switching means, and rotation from the positive rotation drive pulley is transmitted to the drive shaft via the positive rotation shaft. To cause negative rotation of the drive shaft, only the negative rotation belt is tensed by the belt switching means, and rotation from the negative rotation drive pulley is transmitted to the drive shaft via the negative rotation shaft.


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