1982-07-08
1984-08-28
Johnson, Richard J.
Undertaking
172900, A63B 2302
Patent
active
044680228
ABSTRACT:
A sit-up exercise apparatus having a structure that can be secured to the bottom of a door which comprises, means for restraining feet of an exerciser when performing a sit-up exercise, support means for supporting the foot restraining means at a height above the base of the structure, and screw means for releasably but rigidly securing the foot restraining means to the support means. The support means is substantially an elongated plate member extending from the structure and having, one end thereof downwardly extending to releasably but rigidly be affixed to the structure and another end thereof successively bent into a form resembling stair steps which accomplish height adjustment of the foot restraining means so as to accomodate different size feet.
REFERENCES:
patent: 1969165 (1934-08-01), Turner
patent: 3430953 (1969-03-01), Teetor
patent: 4116434 (1978-09-01), Bernstein
patent: 4185816 (1980-01-01), Bernstein
patent: 4323235 (1982-04-01), Schwarz
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