Closure device

Details Closure device Closure device

1982-03-29

1984-01-03

Norton, Donald F.

Receptacles

Closures

With closure opening arrangements for means

215256, 215301, 4293, 239 60, B65D 4152, B65D 5100

Patent

active

044238240

ABSTRACT:
A closure device, which may serve as a bottle closure or as a sink plug, or may constitute a container such as for an air-freshener material, comprises a base and a lid, formed by a resiliently deformable disc, centrally resiliently mounted on a bridge spanning the base and capable of flexing reversibly between two stable dished conditions, respectively an externally convex closed form and an externally concave open form.

REFERENCES:
patent: 1081434 (1913-12-01), Cote
patent: 2024227 (1935-12-01), Jones
patent: 2362250 (1944-11-01), Durst
patent: 2968047 (1961-01-01), Stilborn
patent: 3136415 (1964-06-01), Sandstrom
patent: 3484016 (1969-12-01), Turner
patent: 3559843 (1971-02-01), Kern
patent: 3876102 (1975-04-01), Wharton
patent: 3934745 (1976-01-01), Lovell
patent: 4149138 (1979-04-01), Pevzner et al.
patent: 4301095 (1981-11-01), Mettler et al.

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