Pressure relief venting lid

Receptacles – Closures – With condition responsive vent or valve

Patent

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Details

220203, 220231, 220254, 220326, 220337, 22020306, 2203661, B65D 4516, B65D 5116, B65D 5118

Patent

active

054602858

ABSTRACT:
A pressure relief venting lid for sealing an opening and providing pressure regulation of a container. The lid has a support plate attached by four angularly spaced spring assemblies to a port cover for sealing a filler opening in a manway cover for the container. The support plate overlies the port cover for fixedly supporting the spring assemblies and cover while protecting the springs and cover from impact or shock. The spring assemblies are disposed between the support plate and port cover for sealing the cover against the opening and allowing the cover to unseat from the opening to regulate the pressure within the container. The spring assemblies are offset equal distances from the center of the port cover to minimize bending moments that the cover may be subjected to. The generally circular port cover has a convex dished portion for strengthening the port cover to maintain the seal with the opening while under load.

REFERENCES:
patent: 1311957 (1919-08-01), Ferris
patent: 2776070 (1957-01-01), Phillips
patent: 3074588 (1963-01-01), Burdue
patent: 3147881 (1964-09-01), Friend
patent: 4181238 (1980-01-01), Arnold et al.
patent: 4218967 (1980-08-01), Batchelor
patent: 4768675 (1988-09-01), Coleman
patent: 5042677 (1991-08-01), Chen et al.
patent: 5111955 (1992-05-01), Baker et al.
patent: 5135024 (1992-08-01), Le Blanc et al.
patent: 5242069 (1993-09-01), Hertrampf
Betts Industries, Inc., Jan. 1991, Section 84, pp. 2A, 2B.

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