1977-03-15
1978-09-26
Johnson, Richard J.
Undertaking
272900, D34 5K, A63B 2302
Patent
active
041164342
ABSTRACT:
A sit-up exercise apparatus adapted to be utilized in conjunction with a door having spaced apart vertically extending surfaces and a bottom intermediate the surfaces. The apparatus comprises frame means having oppositely disposed sides and adapted to be removably secured to the door. The frame means includes an elongated base adapted to extend below the bottom of the door, and front and rear members, each one of the members having an oppositely disposed lower end connected to the base and an upper end with spaced apart inner and outer walls intermediate the ends. The inner walls adapted to extend in overlapping relation with the surfaces of the door. The inner walls oppositely disposed with respect to each other defining a space therebetween greater than the width of the door defined by the surfaces so as to readily permit the positionment of the door therebetween. Clamping means is operatively connected to one of the members and extends inwardly of the inner wall for releasably clamping one of the surfaces of the door, such that the frame is fixedly secured to the door at a selected position thereon and may be readily removed from securement therewith by releasing the clamping means. Supporting means extends outwardly from one of the members on the frame means and is adapted to extend at a height above the base so as to be readily engageable by the insteps of the user of the sit-up exercise apparatus.
REFERENCES:
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patent: 680556 (1901-08-01), Wieland
patent: 2050652 (1936-08-01), Fleming
patent: 2253758 (1941-08-01), Bulloch
patent: 2425971 (1947-08-01), Walker
patent: 3077613 (1963-02-01), Mayer
patent: 3134592 (1964-05-01), Sharkey
patent: 3430953 (1969-03-01), Teetor
patent: 3567218 (1971-03-01), Johnson
patent: 3682475 (1972-08-01), Walker
patent: 3850430 (1974-11-01), Hamilton
Johnson Richard J.
Suroff Leonard W.
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