Gas cap with break-away portion

Details Gas cap with break-away portion Gas cap with break-away portion

1997-04-25

1998-09-29

Shoap, Allan N.

Receptacles

Closures

With closure opening arrangements for means

220288, 220797, 220DIG33, B65D 4102

Patent

active

058135600

ABSTRACT:
A method of seal locking together a preformed plastic molded top lid portion of a gas filler cap to a preformed plastic molded threaded base portion of a gas filler cap. The preformed top lid portion of the gas cap is locked to a stationary preformed threaded base portion of a gas filler cap by spin welding a lower extending tab of the top lid portion into a mating channel in the base portion together. The tab can be a circular rectangular tab having a step down inner edge and an indentation cutout on the lower surface of the lid portion between the tab and an exterior side wall of the lid portion, wherein the indentation cut-out provides a sacrificial break point upon impact and allows the exterior side wall of the top lid portion to break-off without breaking the locking seal between the tab and the channel for reasons of safety upon impact. The channel can be a circular with an angled inner wall. The spin welding causes plastic material on the tab and channel that abuts together to heat, melt and sealingly fuse the tab and channel together.

REFERENCES:
patent: D353357 (1994-12-01), Weinberg et al.
patent: 4231240 (1980-11-01), Fujita et al.

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