Pneumo Corporation

Robert R McPherson

A lost-motion connection is provided between the armature core of a valve position sensor and the valve plunger preventing relative rotation therebetween while permitting relative axial movement by rotation of an adjuster sleeve having threaded engagement with extensions on both the armature core and valve plunger. Surrounding the adjuster sleeve is a locking collar having a multi-sided internal surface engaging a correspondingly shaped multi-sided exterior surface on the adjuster sleeve, whereby rotation of the locking collar causes rotation of the adjuster sleeve. The locking collar is also axially movable into and out of engagement with another correspondingly shaped multi-sided exterior surface on the valve plunger to respectively prevent and permit rotation of the locking collar relative to the valve plunger. The adjuster sleeve may have internal threads of opposite hand at opposite ends thereof in threaded engagement with the extensions on the armature core and valve plunger to provide a coarse adjustment of the armature core relative to the valve plunger during each revolution of the adjuster sleeve. Alternatively, such internal threads may be of the same hand and of different pitch to provide for fine adjustment during each revolution of the adjuster sleeve.

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Kalamazoo, MI, United States of America

Robert R McPherson