Static structures (e.g. – buildings) – Fluent material hopper or storage container with material port – Rod crossing port
Patent
1981-01-26
1983-03-15
Faw, Jr., Price C.
Static structures (e.g., buildings)
Fluent material hopper or storage container with material port
Rod crossing port
52196, E04H 700
Patent
active
043763600
ABSTRACT:
The present invention is directed to an access door assembly (10) comprised of a frame assembly (12) held in place by a plurality of hoop-shaped rods (14). A door (16) is hinged to frame assembly (12) using a pair of first hinge brackets (18) secured to frame assembly (12), a pair of second hinge brackets (20) secured to door (16) near its vertical centerline, and a connecting rod (22) acting as the hinge pin between the first and second hinge brackets (18, 20). A latch mechanism (24) engages a mid-step member (26) to secure door (16) tightly against a door frame structure (28). In doing so, flexible door (16) bends to conform generally to the curvature of cylindrical silo wall (30).
Upper and lower step members (56, 58) are a part of frame assembly (12) and mid-step member (26) is supported by frame assembly (12). Hence the step members acting as ladder rungs are not supported by door (16), but rather by its frame.
REFERENCES:
patent: 952876 (1910-03-01), Clark et al.
patent: 1218240 (1917-03-01), Cronemeyer
patent: 1381894 (1921-06-01), Stafford
patent: 2068972 (1937-01-01), Bangert
patent: 2153473 (1939-04-01), Mott
patent: 2322923 (1943-06-01), Craine
patent: 2341763 (1944-02-01), Craine
patent: 2367720 (1945-01-01), Goldberg
patent: 3709345 (1973-01-01), Price
patent: 3997025 (1976-12-01), Price
patent: 4271632 (1981-06-01), Vanderloop
Faw Jr. Price C.
Friedman Carl D.
Hanson Silo Company
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