Back exercise apparatus

Details Back exercise apparatus Back exercise apparatus

1991-09-10

1992-09-01

Bonck, Rodney H.

Machine element or mechanism

Gearing

Plural power paths to and/or from gearing

74665G, 74665GA, 74665GC, 74371, F16H 3706

Patent

active

051429446

ABSTRACT:
Back exercise apparatus has a seat and a footrest, with a first backrest pivotable about a horizontal first axis for biasing the upper portion of a person on the seat about the first axis, and a second backrest pivotable about a vertical second axis for biasing the upper portion of the person about the second axis. A gearbox selectively connects a drive to either backrest and has an input shaft connected to the drive, a pair of output shafts parallel to the input shaft and a selector for connecting the input shaft to a selected one of the output shafts for rotating the selected output shaft in either direction of rotation.

REFERENCES:
patent: 3011353 (1961-12-01), Friedrich et al.
patent: 3968704 (1976-07-01), Fogelberg
patent: 4679461 (1987-07-01), Mizuguchi et al.

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