Liquid filled dumbbell

Details Liquid filled dumbbell Liquid filled dumbbell

1990-04-06

1991-10-15

Bahr, Robert

Undertaking

272119, 272130, A63B 21075

Patent

active

050567780

ABSTRACT:
A dumbbell partially filled with a liquid such as water that has a passageway in the gripping portion with a valve to control the rate of flow and when the wrist is twisted, the liquid flows from one end of the dumbbell to the other thus providing an increasing controllable resistance to the wrist and arm muscles. Also the device may be attached to other portions of the body, such as a foot, by hook and loop fastener.

REFERENCES:
patent: 1511312 (1924-10-01), Alastalo
patent: 3334899 (1967-08-01), Bosko
patent: 3756592 (1973-09-01), Johnson
patent: 3987506 (1976-11-01), Markwitz
patent: 4040619 (1977-08-01), Landi
patent: 4079932 (1978-03-01), Schuetz
patent: 4146222 (1979-03-01), Hribar
patent: 4351526 (1982-09-01), Schwartz
patent: 4357009 (1982-11-01), Baker
patent: 4596387 (1986-06-01), Roberts
patent: 4676501 (1987-06-01), Hoagland et al.
patent: 4685665 (1987-08-01), Carlisle
patent: 4854575 (1988-01-01), Wilson
patent: 4854576 (1988-06-01), McWain

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