Hydraulic gymnasium equipment

Details Hydraulic gymnasium equipment Hydraulic gymnasium equipment

1989-03-22

1990-12-25

Bahr, Robert

Undertaking

272134, 272143, 272DIG4, A63B 21008

Patent

active

049797360

ABSTRACT:
Gymnasium equipment has a vertically movable column on the upper end of which are a pair of arm retention tubes which will accept arms of various items of ancillary equipment to perform a range of gymnasium functions. A gymnast will cause the ancillary equipment, and therefore the retention tubes, to rock about in horizontal axis, and in doing so cause a piston to move in or out of an hydraulic cylinder, displacing oil from the cylinder through a valve at a rate which is adjustable. With simple and inexpensive ancillary equipment, the invention makes it possible to achieve many different gymnastic functions.

REFERENCES:
patent: 2855199 (1958-10-01), Noland et al.
patent: 3128094 (1964-04-01), Wolf
patent: 3495824 (1970-02-01), Coinier
patent: 3822599 (1974-07-01), Brentham
patent: 4185818 (1980-01-01), Brentham
patent: 4291787 (1981-09-01), Brentham
patent: 4441708 (1984-04-01), Brentham
patent: 4448412 (1984-05-01), Brentham
patent: 4566692 (1986-01-01), Brentham
patent: 4667955 (1987-05-01), Giesch

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