Proportional solenoid with armature motion sensing

Details Proportional solenoid with armature motion sensing Proportional solenoid with armature motion sensing

2007-05-22

2009-12-08

Barrera, Ramon M (Department: 2832)

Valves and valve actuation

Electrically actuated valve

Remote or follow-up control system for electrical actuator

C335S229000, C335S301000, C324S207200, C340S644000

Reexamination Certificate

active

07628378

ABSTRACT:
A shielded solenoid for a solenoid operated valve having a solenoid body and an annular coil of electrical wire in the solenoid body. An armature of magnetic material is rectilinearly movable with respect to the body. A magnet holder is fastened to the armature and has a permanent magnet fixedly oriented thereon. A shield member covers the magnet holder and the permanent magnet. The shield member is configured to shield a Hall effect sensor from any significant electromagnetic field produced by the coil when effecting rectilinear movement of the armature. The hollow shield member has a non-metallic plug closing one end thereof. The plug has the Hall effect sensor oriented therein to closely oppose the magnet on the magnet holder so that movement of the armature and resulting corresponding movement of the magnet will cause the Hall effect sensor to produce a signal indicative of movement of the armature.

REFERENCES:
patent: 6281772 (2001-08-01), Adams
patent: 6321781 (2001-11-01), Kurth
patent: 6404186 (2002-06-01), Schoedlbauer
patent: 6455185 (2002-09-01), Bircann et al.
patent: 6588262 (2003-07-01), Kirzhner et al.
patent: 6666429 (2003-12-01), Fukano et al.
patent: 6948697 (2005-09-01), Herbert et al.

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