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Chiropractic adjustment instrument

  • US 9,980,870 B2
  • Filed: 05/16/2012
  • Issued: 05/29/2018
  • Est. Priority Date: 05/26/2011
  • Status: Active Grant
First Claim
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1. A cordless chiropractic adjustment device, adapted to receive at least one battery which in use provides direct current to a motor, comprising:

  • a thrust element capable of impacting a body contact member;

    a first resilient spring arranged to bias the thrust element towards the body contact member;

    a second resilient spring arranged to be held under compression by the anvil member so as to bias the thrust element away from the body contact member; and

    a tube member through which the thrust element propels towards the body contact member;

    wherein the thrust element has a primed configuration in which sliding of the thrust element within the tube member is prevented by protrusion of a ball bearing, and a fired configuration in which the thrust element is slidable within the tube member by retraction of the ball bearing; and

    a set ring acting on the body contact member allowing the distance between the thrust element and the body contact member to be varied, thereby altering a peak force of a resultant thrust of the thrust element towards the body contact member;

    wherein said motor is arranged to move the thrust element between;

    the primed configuration, in which the thrust element is held distant from the body contact member, andthe fired configuration in which the thrust element is propelled by the first resilient spring towards the body contact member; and

    wherein a start thread member, in communication with said motor, converts rotation of a shaft of said motor to linear movement of the thrust element via the start thread member having an external male screw thread arranged to cooperate with a female screw thread of the tube member.

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