Method for evacuating air from an electromagnetic actuator has a rotatable sealed hollow rod with an eccentric end plate providing access to the outside at one angular position

摘要

The actuator has an armature (4) in a pressure tube (1) having a fluid filled damping chamber (3) sealed to the atmosphere by a ball valve (12,13,18) in a rotatable, sealed (19) tube (6) with the inner end (10) having a gap (8) leading to a duct (7B,7A,7). By depressing the ball (13) through the duct (7) air may be evacuated when the tube (6) is turned to a particular angle opening the space (3) to atmosphere.