Static structures (e.g. – buildings) – Fluent material hopper or storage container with material port
Patent
1975-04-28
1976-04-06
Perham, Alfred C.
Static structures (e.g., buildings)
Fluent material hopper or storage container with material port
49347, 49357, 220262, 220334, E04H 722
Patent
active
RE0287555
ABSTRACT:
The filling lid for sealed silos has a base plate adapted to close an inlet in the silo roof, the base plate having an opening therethrough registering with the silo inlet. A filling hopper is provided on the base plate around the opening, the hopper being open at its top to receive the usual gooseneck of a silage blower. A closure plate is hingedly mounted on the underside of the base plate adapted in operative position to cover the opening in said base plate in an airtight manner. Linkage is provided for swinging the closure plate into operative position, including a bell crank lever pivoted on the side of the hopper having one arm disposed substantially vertically when the closure plate is normally hanging freely in inoperative position. The other arm of the bell crank lever extends downwardly and rearwardly and is pivotally connected to the upper end of a link extending downwardly through a slot in the base plate with its other end pivoted to the closure plate. And a cable extends from the first arm of the bell crank lever across the silo roof and down the side of the silo and is adapted to be locked when the cable is drawn taut, thereby maintaining the closure plate in operative position.
REFERENCES:
patent: 952133 (1910-03-01), Norquist
patent: 1046456 (1912-12-01), Freeland
patent: 1381630 (1921-06-01), Goodrich
patent: 1606621 (1926-11-01), Fischer
patent: 2835269 (1958-05-01), Seymour
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