×

Back and spine exerciser

  • US 4,291,686 A
  • Filed: 01/14/1980
  • Issued: 09/29/1981
  • Est. Priority Date: 01/14/1980
  • Status: Expired due to Term
First Claim
Patent Images

1. A method of exercising the back and spine of a person, comprising the application to the spine of a gentle, slow cyclical action of alternate periods of tension and relaxation of the tension, by applying a harness to the head and chin of the user, and applying symmetrical and cyclic reciprocating motion of small amplitude having a 360°

  • substantially sinusoidal waveform when plotted against time, and of slow period to said harness substantially along a line parallel to the axis of the spine.

View all claims
  • 0 Assignments
Timeline View
Assignment View
    ×
    ×