Dumbbell with quick release bolt

Details Dumbbell with quick release bolt Dumbbell with quick release bolt

2007-02-27

2007-02-27

Donnelly, Jerome (Department: 3764)

Exercise devices

User manipulated force resisting apparatus, component...

Utilizing weight resistance

C482S107000, C482S104000

Reexamination Certificate

active

10665665

ABSTRACT:
A dumbbell including a tubular handle with a thread on the inside surface of the tube. A straight groove that cuts through the internal thread is also formed on the inside surface of the tubular handle. A stop plate is mounted on each end of the tubular handle. A pair of retainers are provided, each retainer being a shaft with a retainer plate on one end. Each shaft has a partial thread on its outside surface extending the length of the respective shaft.A weight plate stack is mounted on the shaft and the shaft is securely inserted into the tubular handle by aligning the partial thread with the groove, sliding the shaft through openings in the weight plates into the tubular handle, then rotating each shaft to where the partial thread on the shaft engages the interior thread of the tubular handle.

REFERENCES:
patent: 675314 (1901-05-01), Abenheim
patent: 1991520 (1935-02-01), Postl
patent: 3488051 (1970-01-01), Papistas-Scherer
patent: 4638994 (1987-01-01), Gogarty
patent: 4738446 (1988-04-01), Miles
patent: 5484367 (1996-01-01), Martinez

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