Portable abdominal exerciser

Details Portable abdominal exerciser Portable abdominal exerciser

1989-08-18

1991-04-09

Bahr, Robert

Undertaking

272135, A63B 2102

Patent

active

050058320

ABSTRACT:
An exercise device for specific isolation and development of abdominal muscle groups comprises a deformable spring-resistance which is closely retained against the user's abdominal region and provision for tensioning the spring device with a dual-handle pulley system and an adjustable means for accurately controlling the spring tension and the resistance force that is pressed against the abdomen. When the device is in place and tensioned the user resists the tension by expanding the abdomen to exercise and thus develop the abdominal musculature.

REFERENCES:
patent: 3491751 (1970-01-01), Wolfing
patent: 3503388 (1970-03-01), Cook
patent: 4428577 (1984-01-01), Weingardt
patent: 4775150 (1988-10-01), Graham
patent: 4863159 (1989-09-01), Brown, Jr.

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