Pivoting unloading door assembly and common conveyor drive...

Conveyors: power-driven – Conveying system having plural power-driven conveying sections – With means allowing a section to fold upon itself

Reexamination Certificate

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C198S300000, C198S598000, C198S692000, C414S467000, C414S505000, C414S523000, C414S525100, C414S528000, C414S537000, C460S119000, C056S449000

Reexamination Certificate

active

11092239

ABSTRACT:
A pivoting unloading door for ramp assembly and common conveyor drive for door or ramp segments thereof. The door or ramp segments are pivotable about a pivotal axis between a folded or closed position in generally overlaying relation one to the other, and an unfolded or open unloading position in parallel, end-to-end relation, the door segments including conveyors thereon for conveying objects or matter thereover when in the unloading position. The door assembly includes a common drive for the conveyors which is disposed beneath the conveyors in the unloading position in coaxial relation with the pivotal axis, and which is operable for simultaneously moving the conveyors. The output of the drive can extend through a pivot joint connecting the door segments, and can connect the elements of the pivot joint.

REFERENCES:
patent: 668741 (1901-02-01), Pridmore
patent: 1704841 (1929-03-01), Sacerdote
patent: 2325433 (1943-07-01), Sprinkle
patent: 2490381 (1949-12-01), Shields
patent: 3071237 (1963-01-01), Powell
patent: 3103274 (1963-09-01), Mayrath
patent: 3504782 (1970-04-01), Slagle
patent: 3650376 (1972-03-01), Burgis et al.
patent: 3894646 (1975-07-01), Head et al.
patent: 4072242 (1978-02-01), Cook
patent: 6766634 (2004-07-01), Covington et al.

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