Vent for portable gas tank or the like

Details Vent for portable gas tank or the like Vent for portable gas tank or the like

1988-06-09

1990-03-06

Lowrance, George E.

Receptacles

Closures

Vent in closure

220375, 220231, 251276, B65D 5116, B65D 5516

Patent

active

049058630

ABSTRACT:
An improvement in manually operable vents includes a pair of barbs positioned on the end of a leg attached to a vent screw. A vent body is formed with a retaining well on its underside facing the barbs. A throat is formed in the vent body, opening into a flat upper surface of the retaining well. During assembly, the vent screw is screwed into the vent body, causing the barbs to deflect inwards as they are urged through the throat. Once clear of the throat, the barbs restore to their normal position. The vent screw is then held captive, if removal is attempted, by the barbs wedging against the flat upper surface and a cylindrical side wall of the retaining well.

REFERENCES:
patent: 193015 (1877-07-01), McCarthy
patent: 385256 (1888-06-01), Eggers
patent: 733438 (1903-07-01), Tatum
patent: 2784865 (1957-03-01), Rieke
patent: 3454182 (1969-07-01), Morton
patent: 3910572 (1975-10-01), Denler
patent: 4113138 (1978-09-01), Fields
Drawings of a first type of screw vent manufactured and sold by Kelch Corp.
Drawing of a second type of screw vent manufactured and sold by Kelch Corp.
Drawing of an alternate type of crystal manufactured and sold by Kelch Corp.

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