Exercise apparatus

Details Exercise apparatus Exercise apparatus

1982-09-07

1985-08-13

Hafer, Robert A.

Undertaking

272127, 272134, A63B 2302, A63B 2304

Patent

active

045345538

ABSTRACT:
The pedalling action drives a drive axle which is positioned below the back support. A wheel is eccentrically positioned on the drive axle and acts as a cam to drive the back support in its repeated pivoting motion. Roller bearings are positioned on the underneath side of the back support and engage the eccentric wheel (cam), thereby reducing friction between the rotating wheel and the pivoting back support during the sit up cycle.

REFERENCES:
patent: 1143981 (1915-06-01), Macklin
patent: 1482173 (1924-01-01), Willard
patent: 1686979 (1928-10-01), McManis
patent: 2009730 (1935-07-01), Fisher
patent: 2320489 (1943-06-01), Turner et al.
patent: 2494746 (1950-01-01), Colston
patent: 2498047 (1950-02-01), Myers
patent: 3112108 (1963-11-01), Hanke
patent: 3432164 (1969-03-01), Deeks
patent: 3880153 (1975-04-01), Perrine
patent: 4036219 (1977-07-01), Simjian

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