Locking-mechanism for preventing premature opening of a tool

Details Locking-mechanism for preventing premature opening of a tool Locking-mechanism for preventing premature opening of a tool

1985-02-28

1986-07-29

Schmidt, Frederick R.

Tools

Tool jaw

With means requiring a completion of travel of jaw movement

81323, 81338, B65B 702

Patent

active

046025359

ABSTRACT:
A mechanism for preventing premature opening of a tool having two elongate handles comprising a carrier having a row of teeth at one edge and a spring-affected, pivotable pawl co-operating with the row of teeth. The pawl operates as a bistable rocker swingable by end stops at both ends of the row of teeth from a first lateral position for engagement with the row through an instable middle position into a second engagement-free lateral position. The two ends of the spring affecting the pawl and a pivot pin on which the pawl is mounted lie along one straight line when the pawl passes through the instable middle position.

REFERENCES:
patent: 2777345 (1957-01-01), Reider
patent: 4158302 (1979-06-01), O'Loughlin
patent: 4170154 (1979-10-01), Izraeli

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