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:
Feb. 09, 1993
Filed:
Jul. 15, 1991
Yuzo Sekiguchi, deceased, late of Kiryu, JP;
Hirokazu Murayama, Kiryu, JP;
Ogura Corporation, , JP;
Abstract
An electromagnetic clutch 11 including a rotor assembly 14 with an attraction surface 14d, a field coil assembly with an electromagnetic coil 15 and a coil support yoke 16, and an armature assembly 19. The armature assembly has an armature hub 20 which can be connected to a driven shaft 18, a stopper plate 21 connected to the hub 20, a ring shaped armature 24 and a damper which connects the armature to the stopper plate. The damper has a rubber damper 27 which is held in a damper cover 30a, 30b or 125b. The damper cover includes an open side with bevelled edges. The bevelled edges have an arc-shaped area 30e, 30f or 125c that prevents stress contractions in the end of the rubber damper 27 or 126 to prevent cracking of the vulcanized rubber. A rivet 25 or 124 may also be in the rubber damper. A free end of the rivet has a bevelled arc-shaped area 25a or 124a that limits stress concentrations to prevent cracking of the rubber damper 27 or 126. The bevelled areas prevent cracking of the rubber damper without increasing the axial length of the electromagnetic clutch 11.