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Shoulder patting instrument

  • US 4,069,816 A
  • Filed: 03/15/1976
  • Issued: 01/24/1978
  • Est. Priority Date: 04/12/1975
  • Status: Expired due to Term
First Claim
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1. In a shoulder patting instrument, the combination comprising a housing having an aperture formed therein and including a handle on one side thereof, an electromagnet having a relatively weighty stator and coil stationarily mounted within the housing and having a relatively lighter movable armature cooperating therewith movable between a retracted position and an energized position, a plunger fixed to the armature and generally centered with respect to the aperture in the housing, a pad on the end of the plunger projecting outwardly of the housing for pressing against a body surface upon guidance by the handle, means for applying pulses of current intermittently to the coil, the electromagnet being oriented so that when a pulse of current is applied to the coil the armature is attracted by the stator for thrusting of the plunger relatively outwardly with respect to the housing so that the housing and weighty stator are thrust relatively away from the body surface, the inertia of the stator and housing providing a reaction force which is applied by the plunger to the body in the form of a pat, the plunger being free upon cessation of current to return to its retracted position resulting in a slight bouncing movement of the stator and housing with respect to the body surface, resilient means interposed between the stator and armature for cushioning the movement of the armature into its energized position, the handle being elongated and extending generally perpendicularly to the direction of plunger movement and having a grip portion at the end thereof for pressing the instrument lightly against the body surface while accommodating the slight bouncing movement of the housing.

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