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. 18, 1980
Filed:
Oct. 11, 1977
Masao Ariga, Kawasaki, JP;
Hiroyuki Hattori, Inagi, JP;
Katsuichi Shimizu, Hoya, JP;
Hirotoshi Kishi, Tokyo, JP;
Hiroshi Ogawa, Kawasaki, JP;
Takahiko Amanuma, Tokyo, JP;
Kazumi Umezawa, Kawasaki, JP;
Seiji Sagara, Kawasaki, JP;
Canon Kabushiki Kaisha, Tokyo, JP;
Abstract
A spring clutch device includes a driving side clutch shell, a driven side clutch shell opposed to and coaxial with the driving side clutch shell, a clutch spring disposed in a tight manner over the two clutch shells, a stop member disposed coaxially with the clutch shells and engaged with one end of the clutch spring to control the action of the clutch spring, and a control member for acting on the stop member, there are formed projections on the circumference of the stop member, in an axially and circumferentially staggered relationship, and the control member is selectively displaceable to positions corresponding to the projections for engagement and disengagement with the projections, thereby controlling ON-OFF of the clutch.