Back exercise apparatus

Details Back exercise apparatus Back exercise apparatus

1990-03-08

1991-12-10

Bahr, Robert

Surgery

Truss

Perineal

272129, 272134, 272144, 272DIG4, A61H 102, A63B 2100

Patent

active

050708635

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: 4462252 (1984-07-01), Smidt et al.
patent: 4637607 (1987-01-01), McArthur
patent: 4725055 (1988-02-01), Skowronski
patent: 4727860 (1988-03-01), McIntyre
patent: 4732381 (1988-03-01), Skowronski
patent: 4753126 (1988-06-01), Sammaratano
patent: 4802462 (1989-02-01), Reiss et al.
patent: 4836536 (1989-06-01), Jones
patent: 4902009 (1990-02-01), Jones

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