Wear resisting span lock system
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United States of America Patent
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Nov 26, 2013
Grant Date -
N/A
app pub date -
Apr 11, 2013
filing date -
Apr 11, 2012
priority date (Note) -
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Abstract
A wear resisting span lock system for bascule bridges includes a normally-inactive hydraulic lockbar shoe expander operable to minimize sliding engagement of the lockbar with its guiding and receiving shoes only during bridge opening and closing operations.
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