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:
Nov. 09, 2021
Filed:
Dec. 11, 2020
Brother Kogyo Kabushiki Kaisha, Nagoya, JP;
Shoichiro Nishimura, Yokkaichi, JP;
BROTHER KOGYO KAB USHIKI KAISHA, Nagoya, JP;
Abstract
An image forming apparatus includes: a motor; a roller; and a power transmission device for transmitting a driving force of the motor to the roller. The power transmission device includes: a planetary gear mechanism including a first helical gear into which the driving force is inputted, a second helical gear for outputting the driving force to the roller, and a transmission element; and a restriction member. The transmission element can transmit the driving force when the restriction member is in its restricting position and thus rotation of the transmission element is restricted, and interrupts transmission of the driving force when the restricting member is in its non-restricting position and thus rotation of the transmission element is not restricted. A direction of a first thrust force applied to the first helical gear and a direction of a second thrust force applied to the second helical gear are opposite to each other.