Spring-type exercise device

Details Spring-type exercise device Spring-type exercise device

1987-05-01

1988-10-04

Bratlie, Steven A.

Undertaking

272137, A63B 2102

Patent

active

047751495

ABSTRACT:
An elongated shaft includes a spring anchoring point at each end and in the center. A pair of sleeves are slidably positioned on the shaft, one between the central anchoring point and each end anchoring point. Each sleeve is joined to the anchor point on either side thereof by a coil spring. Each coil spring is identical in length and tension strength, and is formed from steel wire of a selected gauge. The coil spring tension strength of all the springs on the bar is modified by varying the width distance between each coil turn in a selected segment or segments of each spring. In use, each spring may be compressed toward or extended away from the associated anchor point, depending upon the particular exercise.

REFERENCES:
patent: 818242 (1906-04-01), Geisel
patent: 3058705 (1962-10-01), Hagg et al.
patent: 3544106 (1970-12-01), Barrett
patent: 3761083 (1973-09-01), Buchner

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