Locking system for flood cover

Details Locking system for flood cover Locking system for flood cover

1984-12-28

1986-04-29

Pollard, Steven M.

Receptacles

Closures

Having means for securing or retaining closure in its closed...

220 18, 220323, 220346, 174 38, H02G 902

Patent

active

045851417

ABSTRACT:
A locking system for a flood cover having a rigid mouth. The system has a pair of oppositely opposed locking mechanisms. Each leg mechanism includes a stiff leg portion whose length is greater than the air space that would result if the closure over which the cover is to be placed were centered in the cover. A spring holds the stiff leg essentially parallel to the mouth before the cover is placed over the closure. As the cover is placed over the closure the stiff leg pivots and the tension of the spring increases.

REFERENCES:
patent: 565013 (1896-08-01), Moodie
patent: 1183490 (1916-05-01), Pollgreen
patent: 1320543 (1919-11-01), Gill
patent: 1433912 (1922-10-01), Rosenlof
patent: 2256257 (1941-09-01), Dukehart, Jr.
patent: 2724968 (1955-11-01), Greene
patent: 3343712 (1967-09-01), Lentz
patent: 3928713 (1975-12-01), Davis
patent: 4475571 (1984-10-01), Houston, Jr. et al.
TI221, Issue 1, 2/76.
Maintenance and Rehabilitation Systems, 3M 1981.
Coil Sales and Manufacturing Co., `B` Flood/Security Control Cover, Series 375, Issue C 6/77.

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