US Patent 7504917 Electromagnetic switch of starter

Patent 7504917 was granted and assigned to Denso on March, 2009 by the United States Patent and Trademark Office.

Overview Structured Data Issues Contributors Activity

Is a

Patent

Patent attributes

Current Assignee

Denso

Patent Jurisdiction

United States Patent and Trademark Office

Patent Number

7504917

Date of Patent

March 17, 2009

Patent Application Number

11598057

Date Filed

November 13, 2006

Patent Primary Examiner

‌

Elvin G. Enad

Patent abstract

An electromagnetic switch has a magnetic core having a base member and a disc member. The disc member is made of plates laminated along a pulling direction and has an inner hole. The base member has both a first portion and a second portion having a groove on its outer surface and disposed in the hole. An inner portion of a particular plate among the plates is disposed in the groove so as to fasten the particular plate to the base member. When the core is magnetized in response to excitation of a coil, a plunger is moved toward the first portion of the core along the pulling direction, a movable contact moved with the plunger comes in contact with a fixed contact electrically connected with a motor, and electric power is supplied to the motor through the fixed and movable contacts.