Patent ID: 9631735
Date: 2017-04-25
CPC Classifications: B03C,F16K,H01F

Claim:
1. An electrohydraulic solenoid comprising: a hollow cylindrical bobbin having a flange at a first end; a core defining a cavity having an open end, the core at least partially disposed in the hollow of the bobbin; an armature disposed within the cavity and supported for axial movement within the cavity; and a pole piece having a portion disposed in the hollow of the bobbin at the first end with an axial face of the portion abutting the open end of the cavity and a shoulder axially spaced from the flange forming a gap; wherein a vent path is formed between the cavity and an outer environment, the vent path comprising at least a portion of the gap, with a magnet disposed in a portion of the vent path and at least partially overlaps with the flange at the first end of the bobbin in an axial plane.