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. 13, 1995
Filed:
May. 13, 1994
Nobuyuki Inoue, Kanagawa, JP;
Canon Kabushiki Kaisha, Tokyo, JP;
Abstract
A planetary-friction type speed change device includes: (a) a sun roller arranged to rotate about an axis in response to a motive rotation; (b) an outer ring substantially coaxial with the sun roller; (c) a plurality of planetary rolling elements disposed between the sun roller and the outer ring to contact each of an outer circumferential face of the sun roller and an inner circumferential face of the outer ring; (d) a casing member for housing therein the sun roller, the plurality of planetary rolling elements, and the outer ring such that the outer ring is movable relative to the casing member; and (e) an elastic member, disposed within the casing member, for supporting and axially pressing the outer ring such that the outer ring is movable in a radial direction relative to the casing member. The rotation of the sun roller causes the plurality of planetary rolling elements to revolve, thereby producing a rotation output at a reduced speed.