Lockable slider for slide fasteners

Details Lockable slider for slide fasteners Lockable slider for slide fasteners

1987-02-17

1988-01-19

Sakran, Victor N.

Buckles, buttons, clasps, etc.

Zipper or required component thereof

Slider having specific configuration, construction,...

24419, A44B 1930

Patent

active

047196734

ABSTRACT:
An automatic lock slider for a slide fastener provided with discrete coupling elements includes a locking prong which is movable into and out of a guide passage in the slider. The prong has a cam surface downwardly canted at an angle of 20.degree.-30.degree. which represents the critical point at which the coupling elements would otherwise become displaced or dislodged when subjected to stresses tending to spread apart the fastener chain, and the cam surface initiates at a position above the upper end surface of the coupling element. This arrangement facilitates passage of the fastener chain underneath the locking prong without marring the coupling elements when external forces are exerted on the fastener chain.

REFERENCES:
patent: 2373523 (1945-04-01), Winterhalter
patent: 2571024 (1951-10-01), Feitl
patent: 2737699 (1956-03-01), Erdmann
patent: 2978773 (1961-04-01), Erdmann
patent: 3018534 (1962-01-01), Huelster
patent: 3320645 (1967-05-01), Burbank
patent: 3508304 (1970-04-01), Burbank
patent: 4130918 (1978-12-01), Ishii et al.
patent: 4137609 (1979-02-01), Kedzierski
patent: 4271567 (1981-06-01), Aoki
patent: 4422220 (1983-12-01), Oda
patent: 4644613 (1987-02-01), Kedzierski

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