Tensioning car for flexible continuous tram
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United States of America Patent
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-
Mar 2, 1993
Grant Date -
N/A
app pub date -
May 15, 1991
filing date -
May 15, 1991
priority date (Note) -
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Abstract
A tensioning car for a flexible continuous tram comprises a center beam structure adapted to support a segment of the transport belt and a pair of side beam structures, one on each side of the center beam structure and each having coupling devices for coupling it to an adjacent car of the tram. Guide bars join the side beam structures for limited movement relative to each other lengthwise of the tram and also support the center beam structure. Chain guides on each of the beam structures guide the crawler chain of the tram. A pair of hydraulic piston/cylinders, one adjacent each end of the tensioning car, are coupled between the side beam structures. A constant pressure accumulator connected to each cylinder supplies a hydraulic fluid under a substantially constant pressure to the respective cylinder so that the cylinders urge the side beam structures resiliently away from each other and thereby maintain a generally constant tension in the crawler chain.
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