Receptacles – Closures – Vent in closure
Patent
1979-08-07
1981-06-09
Hart, Charles N.
Receptacles
Closures
Vent in closure
55523, 55524, 55529, B65D 5116
Patent
active
042719771
ABSTRACT:
A device comprises a cap formed by a body (4) provided with a base (8) which is biased outwardly by a spring (12) and carries an annular sealing element having a lip (10). The base is provided with a center orifice (14). Mounted on the outer face of the base (8) is a sealing element (20) which is also provided with a center orifice. A filtering element (18) is clamped between the element (20) and the lipped element (10) and closes the orifice (14) so as to substantially preclude the passage of the liquid while allowing the passage of air. The filtering element is formed for example by a tablet which may be partly protected by a thin and impermeable diaphragm (110).
REFERENCES:
patent: 2117369 (1938-05-01), Shaw
patent: 2298938 (1942-10-01), Griffin, Jr. et al.
patent: 2675093 (1954-04-01), McCall et al.
patent: 3199716 (1965-08-01), Price
patent: 3631654 (1972-01-01), Riely et al.
Adams Bruce L.
Burks Richard W.
Burns Robert E.
Hart Charles N.
Lobato Emmanuel J.
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