Undertaking
Patent
1986-11-07
1988-06-14
Apley, Richard J.
Undertaking
272117, 272123, A63B 2100
Patent
active
047507390
ABSTRACT:
The present invention is a plyometric exercising device which a hand bar for movement in opposite directions by a user, a bar guide which guides the movement of the hand bar, a gas supply and at least one cylinder which has a piston which is disposed within and attached to the bar guide and which is interconnected to gas supply. A switch activates the gas supply and is electrically connected to the gas supply. A switch activating mechanism activates the switch and is attached to the hand bar. The plyometric exercising device is operated by lifting the hand bar past the switch, which does not activate the switch and then lowering the hand bar past the switch, which activates the switch and causes compressed gas to flow into the at least one cylinder, which further causes the piston of the at least one cylinder to move downward, forcing the hand bar downward along with them with this sudden on-rush of compressed gas and concomitant force exerted thereby being halted once the hand bar moves further downward past the switch. The halting of the force causes the user to spring or "explode" upward in reaction thereto, thus developing explosive reactive power.
REFERENCES:
patent: 3451271 (1969-06-01), Knoblauch
patent: 3524644 (1970-08-01), Kane
patent: 3998100 (1976-12-01), Pizatella et al.
patent: 4063726 (1977-12-01), Wilson
patent: 4357010 (1982-11-01), Telle
patent: 4540171 (1985-09-01), Clark et al.
patent: 4546971 (1985-10-01), Raasoch
patent: 4564194 (1986-01-01), Dawson
Apley Richard J.
Bahr Robert W.
Johansen W. Edward
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