Magnetic locking tongs

Details Magnetic locking tongs Magnetic locking tongs

2005-03-22

2005-03-22

Kramer, Dean J. (Department: 3652)

Handling: hand and hoist-line implements

Hand bars and hand barrows

Opposing jaws

C294S099200, C294S106000

Reexamination Certificate

active

06869117

ABSTRACT:
Tongs for operations with one hand have a pair of arms hinged at one end. A spring biases the second, grasping ends apart. When the arms are closed, magnetic elements on the inner aspects of the arms together to hold the arms closed and locked. To unlock the arms without the use of another hand or other accessories, a finger or thumb of the holding hand is inserted between the arms, forcing the magnetic elements apart enough to release their hold. A mechanism is provided for inactivating the magnetic lock mechanism when desired.

REFERENCES:
patent: 3304111 (1967-02-01), Kauh et al.
patent: 5199756 (1993-04-01), Bartlett
patent: 5209538 (1993-05-01), Gabruel
patent: 5868357 (1999-02-01), Gabriel
patent: 6056338 (2000-05-01), Kerr
patent: 6089631 (2000-07-01), Thurlow et al.
patent: 6092847 (2000-07-01), Kwan
patent: 6179357 (2001-01-01), Gabriel
patent: 6536819 (2003-03-01), Wang et al.

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