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:
May. 21, 2002
Filed:
Aug. 22, 2001
Yousuke Mae, Yokohama, JP;
Fumihiko Imamura, Yokohama, JP;
Nissan Motor Co., Ltd., Kanagawa, JP;
Abstract
A variable valve timing apparatus has a rotational torque transmission path that changes the relative phases of a camshaft that moves an engine valve and a rotary crank body that is coupled to the crankshaft. The rotational torque transmission path has uses an electromagnetic brake delay rotation of a drum, which is coupled to the rotary crank body by a biasing member and a moving member. When rotation of the drum is delayed, the moving member changes the angular orientation between the drum and the rotary crank body against the biasing force of the biasing member. The electromagnetic brake is coupled to a cover by two protrusions and two concavities. The protrusions are arranged to prevent contact between the electromagnetic brake and the drum due to tension of the chain.