Conveyors: fluid current – Intake to fluid current conveyor – Load receptacle type
Reexamination Certificate
2006-05-18
2010-02-16
Hess, Douglas A (Department: 3651)
Conveyors: fluid current
Intake to fluid current conveyor
Load receptacle type
C406S141000, C406S090000
Reexamination Certificate
active
07661910
ABSTRACT:
The hydraulic elevation apparatus and method of the present invention incorporate a multiple chamber framework internally disposed preferably within at least one single shaft structure, which facilitates movement of object transport containers within the multiple chamber framework. Preferably, fluid elevation is employed to elevate object transport containers and their contents within the multiple chamber framework. Each single shaft structure may be constructed from an existing rehabilitated shaft, or a newly drilled shaft. The present invention may be utilized in vertical or incline lifting environments, and an auxiliary hoist chamber may be incorporated into the multiple chamber framework for use as an alternative to, or in conjunction with, elevating objects by employing fluid elevation. The present invention may be employed in a variety of heavy lifting scenarios, including underground mining or in above ground lifting environments.
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Hess Douglas A
Pillsbury Winthrop Shaw & Pittman LLP
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