Patent ID: 7575219

Claim:
A linear solenoid for an EGR valve, the valve having a carcass with a deep print, the linear solenoid comprising: a fixed magnetic nucleus ( 20 ), a sliding bushing ( 21 ) disposed within the fixed magnetic nucleus, an electrical bobbin ( 22 ), a magnetic closing ( 23 ), a mobile magnetic nucleus ( 24 ), an axle or connecting rod ( 25 ), a conical magnetic nucleus ( 26 ), the carcass with the deep print ( 27 ) and a fixing flange ( 28 ), the fixed magnetic nucleus ( 20 ) having a tubular body ( 29 ) within which is disposed the sliding bushing ( 21 ), the fixed magnetic nucleus having with a circular superior border ( 30 ) having a central puncture ( 31 ) and two orifices ( 32 ) next to the peripheral border, the mobile magnetic nucleus ( 24 ) having a cylindrical body provided with a central puncture ( 33 ) which does not pass into a superior extremity and a central puncture ( 34 ) which does not pass into an inferior extremity and in which the rod is encased and supported in contact with the mobile magnetic nucleus such that the mobile magnetic nucleus restrains radial and axial movement of the rod and the rod moves with the mobile magnetic nucleus, the conical magnetic nucleus ( 26 ) having a cylindrical body with a superior conical terminal ( 35 ) and a superficial socket ( 36 ) which provides a stop for the inferior extremity of the mobile magnetic nucleus, wherein the inferior extremity of the mobile magnetic nucleus ( 24 ) is not disposed within the sliding bushing ( 21 ) and the sliding bushing ( 21 ) does not extend into the conical magnetic nucleus ( 26 ), the superficial socket ( 36 ) leading to a central puncture ( 37 ) which extends to the inferior extremity and which is of a sufficiently close tolerance with respect to the rod ( 25 ) such that the conical magnetic nucleus ( 26 ) sufficiently restrains radial movement of the rod ( 25 ), the conical magnetic nucleus( 26 ) having, externally, one peripheral border ( 38 ) with a circular base of a minor diameter ( 39 ), the carcass with the deep print having in a superior part and close to a mouth thereof, a slim peripheral strangulation ( 40 ) extending completely around a periphery of an outer surface of the carcass directly radially outward of the circular superior border ( 30 ) and defining a groove in the outer surface of the carcass ( 27 ).