Patent ID: 6870278

Claim:
A starter for an internal combustion engine comprising: a front cover ( 1 ) and a rear cover ( 14 ); a motor mounted between the front and rear covers, the motor having a stator ( 10 ) with permanent magnets ( 11 ) and an armature ( 13 ) having shaft ( 29 ) with a first cavity ( 13 . 3 ); a disengaging electromagnet ( 16 ) containing a fixed core ( 18 ), a mobile core ( 19 ) which defines a second cavity ( 19 . 1 ), and contacts (K 1 , K 2 ) for connection with a bridge 20 ; an engaging spring ( 12 ) adapted in said second cavity ( 19 . 1 ) and having a first side ( 12 . 1 ) and a second side ( 12 . 2 ); a return spring ( 24 ) situated between the fixed core ( 18 ) and the mobile core ( 19 ); a pinion ( 4 ) projecting from the front cover ( 1 ), which is slidingly seated in said first cavity ( 13 . 3 ), and which is actuated by a transmission element through the mobile core ( 19 ), said transmission element consisting of two independently coaxially seated parts, one of said parts being an engaging bar ( 25 ), and another of said parts being a stop pin ( 27 ) having a narrow portion ( 27 . 3 ) within said engaging spring ( 12 ), the engaging bar ( 25 ) being positioned between an end ( 4 . 1 ) of the pinion ( 4 ) and the stop pin ( 27 ), and being led through an internal shoulder ( 13 . 1 ) in the first cavity ( 13 . 3 ) and through a shoulder ( 18 . 1 ) in said fixed core ( 18 ); the second cavity ( 19 . 1 ) being longer by a preset distance ( 13 . 5 ), than the narrow portion ( 27 . 3 ), wherein said preset distance ( 13 . 5 ) prevents the switching of the bridge ( 20 ) with contacts (K 1 ) and (K 2 ) before the engagement of the pinion ( 4 ) into a gear rim of the internal combustion engine; and the engaging spring ( 12 ) bearing with said first side ( 12 . 1 ) against a first front surface ( 27 . 1 ) of the stop pin ( 27 ), and bearing with said second side ( 12 . 2 ) against a cavity bottom ( 19 . 2 ) of the second cavity ( 19 . 1 ), and said stop pin ( 27 ) bearing with its second front surface ( 27 . 2 ) against a washer ( 26 ) secured in the mobile core ( 19 ).