An electric contactor for servoaturador pneumatic braking and pneumatic braking servoatuador incorporating said contactor

摘要

The contactor incorporates, in a cavity (70), a fixed contact blade (20) and a movable contact blade (21) pushed elastically away from the fixed contact blade (20) in the opposite direction to the direction in which the follower (13) is pushed, the follower (13) being capable of cooperating in thrust with the piston mechanism (2) of the casing of the servomotor in which the contactor is mounted, the movable contact blade being coupled to a plunger (15) mounted so as to slide in the follower (13) and incorporating a shoulder (16) which is capable of cooperating with an abutment (18) of the follower. The cavity (70) isoldated hermetically from the outside, communicates freely and permanently with the rear working chamber (4) of the servomotor through passages (12).