Rubber-tire gantry crane with shore power
First Claim
1. An apparatus for coupling power from a high voltage electrical network to a low voltage power input on a mobile crane, comprising:
- a trolley;
a guiding apparatus attached to said trolley;
a transformer attached to said trolley, wherein said transformer comprises a high voltage input and a low voltage output and said low voltage output has a value selected for powering the crane; and
a power input coupler adapted to receive power from the high voltage electrical network, said power input coupler connected to said high voltage input of said transformer.
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Accused Products
Abstract
An apparatus for coupling power from shore power to a rubber tire gantry (RTG) crane comprises a power junction trolley and optionally an RTG crane. The power junction trolley receives power through a high voltage cable or alternatively through an inductive power coupling and alternatively outputs a low AC or a low DC voltage through a flexible power cable for connection to an RTG crane. A guiding apparatus directs the power junction trolley along a selected path so as to reduce a control accuracy requirement for the RTG crane. The RTG crane may move from a selected path to another selected path without interrupting a high voltage connection. The power junction trolley optionally determines its position relative to a selected path comprising a guide rail in some embodiments and a guide wire in others. Embodiments of the power junction trolley are alternately self-propelled or towed by the RTG crane.
23 Citations
25 Claims
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1. An apparatus for coupling power from a high voltage electrical network to a low voltage power input on a mobile crane, comprising:
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a trolley; a guiding apparatus attached to said trolley; a transformer attached to said trolley, wherein said transformer comprises a high voltage input and a low voltage output and said low voltage output has a value selected for powering the crane; and a power input coupler adapted to receive power from the high voltage electrical network, said power input coupler connected to said high voltage input of said transformer. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15)
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16. A method for connecting shore power to a rubber tire gantry crane, comprising:
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connecting a shore power cable to a high voltage power input on a power junction trolley; and connecting a flexible power cable from a low voltage power output on the power junction trolley to a low voltage power input on the rubber tire gantry crane. - View Dependent Claims (17, 18, 19)
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20. A rubber tire gantry crane powered from an external electrical power source, comprising:
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a power junction trolley having a high voltage input terminal and a low voltage output terminal; a low voltage input terminal on the rubber tire gantry crane; and a flexible power connection from said low voltage output terminal on said power junction trolley to said low voltage input terminal on the rubber tire gantry crane. - View Dependent Claims (21, 22, 23, 24, 25)
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Specification