Part-I - Controller General of Patents Designs and Trademarks

(12) PATENT APPLICATION PUBLICATION (21) Application No.1268/CHE/2012 A
(19) INDIA
(22) Date of filing of Application :30/03/2012 (43) Publication Date : 21/06/2013
(54) Title of the invention : CIRCUIT BREAKER
(51) International classification :H02K (71)Name of Applicant :
(31) Priority Document No
:2011- 1)MITSUBISHI ELECTRIC CORPORATION
237327 Address of Applicant :7-3, MARUNOUCHI 2-CHOME,
(32) Priority Date :28/10/2011 CHIYODA-KU, TOKYO 100-8310 Japan
(33) Name of priority country :Japan (72)Name of Inventor :
(86) International Application No
Filing Date
:NA
:NA
1)HIGAKI, JUNICHI
2)TAKAHASHI, SUSUMU
(87) International Publication No : NA
(61) Patent of Addition to Application Number
Filing Date
:NA
:NA
(62) Divisional to Application Number
Filing Date
:NA
:NA
(57) Abstract :
A circuit breaker includes: a movable contact terminal; a power source side fixed contact terminal and a load side fixed contact
terminal; a rotor; and a contact pressure spring, which is provided to the rotor, and which is configured to apply the contact
pressure to the movable contact terminal wherein the contact pressure spring is configured as a single set of pull springs, in which
ends of the one side of two coils are connected to each other at a connecting portion and ends of the other side of the two coils are
provided with a hook respectively, wherein respective coil portions of the pull springs is provided on respective sides of an axial
direction of a rotating shaft of the movable contact terminal across the opposite face, wherein the hook is directly latched to a rib
formed on the rotor so that the contact pressure is applied.
No. of Pages : 27 No. of Claims : 3
The Patent Office Journal 21/06/2013 13746