Material or article handling – Self-loading or unloading vehicles – Successive handling means
Patent
1995-06-06
1999-02-02
Werner, Frank E.
Material or article handling
Self-loading or unloading vehicles
Successive handling means
198661, 198360, 414296, 414501, 414293, 104 2, E01B 2710
Patent
active
058655921
ABSTRACT:
A stone metering system for a railroad track maintenance vehicle providing improved accuracy in stone delivery. The system includes a surge hopper, a number of metering augers, and a corresponding number of splitters. The metering augers convey ballast stones from the surge hopper to the corresponding splitters, which divide the stones evenly between a number of blow tubes. The pitch of the auger screw flights is increased from the inlet end of the screw to "expand" the stone and reduce the production of fines. In addition, the diameter of the final screw flight is reduced at the outlet end of the auger to provide a consistent and even flow of stone into the splitters. The splitters are dynamically adjustable to provide even distribution between the blow tubes regardless of the cant to the rails. The desired amount of stone is delivered to the tubes by rotating the auger screw the number of full or partial revolutions associated with the amount. In an alternative embodiment, each of the metering augers is replaced by a conveyor having a belt divided into a series of uniformly sized compartments each conveying the same quantity of stone. The desired amount of stone is delivered to the tubes by driving the belt so that a desired number of compartments are emptied into the splitter.
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Pandrol Jackson, Inc.
Werner Frank E.
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