Receptacles – Closures – With condition responsive vent or valve
Patent
1978-06-15
1979-03-13
Price, William
Receptacles
Closures
With condition responsive vent or valve
137467, 137533, 220208, B65D 5116
Patent
active
041437870
ABSTRACT:
A plug fixed within a provided opening in the wall of a pressure cooker releases therefrom when excessive pressure builds up in the cooker. The plug contains an air vent in which a pressure-actuated closure member operates. The closure member has an outer head which rests on the plug about the air vent when the cooker is in an unpressurized state, a stem which loosely extends through the air vent and an inner head having a shoulder which sealingly engages the underside of the plug about the air vent to close the cooker interior to atmosphere, the inner head also having a larger diametered flange which catches the cooker wall when the plug is ejected from the provided opening in response to excessive pressure build up in the cooker.
REFERENCES:
patent: 2301724 (1942-11-01), Vischer, Jr.
patent: 2429149 (1947-10-01), Wittenberg
patent: 2499828 (1950-03-01), Kuriloff
patent: 2619982 (1952-12-01), Turner
patent: 2667891 (1954-02-01), Hilldale
patent: 2670755 (1954-03-01), Kendrick
patent: 2702046 (1955-02-01), Zimmer et al.
patent: 2757685 (1954-08-01), Fritsch
patent: 2769457 (1956-11-01), Wittenberg
patent: 3055536 (1962-09-01), Dieny
patent: 3858750 (1975-01-01), Grall
patent: 3973694 (1976-08-01), Tess
National Presto Industries, Inc.
Price William
Shoap Allan N.
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