Conveyors – chutes – skids – guides – and ways – Chutes – Wall
Reexamination Certificate
2008-09-22
2010-06-15
Deuble, Mark A (Department: 3651)
Conveyors, chutes, skids, guides, and ways
Chutes
Wall
C049S371000, C049S381000, C049S398000
Reexamination Certificate
active
07735620
ABSTRACT:
A bulk material handling system comprising an enclosure, a door frame, and an access door. The door frame is secured to a wall of the enclosure adjacent an access opening. The exterior surface of the door frame is devoid of horizontal surface portions when the enclosure is oriented with the wall of the enclosure in a vertical position. The access door is releasably secured to the door frame and is movable between a closed position and an open position. The exterior surface of the door is devoid of horizontal surface portions when the access door is in the closed position and the enclosure is oriented with the wall of the enclosure in the vertical position.
REFERENCES:
patent: 1499469 (1924-07-01), McMinn
patent: 1874112 (1932-08-01), Miller
patent: 1880370 (1932-10-01), Breitwieser
patent: 2708019 (1955-05-01), Kluegel et al.
patent: 7350636 (2008-04-01), Smith et al.
patent: 2006/0113159 (2006-06-01), Nyquist
Deuble Mark A
Martin Engineering Company
Smith Clyde L.
Thompson & Coburn LLP
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