Treadle and roadway treadle assembly
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United States of America Patent
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-
Jul 8, 1997
Grant Date -
N/A
app pub date -
Oct 26, 1994
filing date -
Oct 26, 1994
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
An optical treadle of extended longevity is disclosed. The treadle is of unitary construction with an improved cross-sectional passageway shape that more effectively interrupts light when a vehicle tire passes thereover. A treadle assembly with permanently affixed light transmitting and light receiving means is also provided such that a failed assembly can be quickly replaced as a unit. Further, a roadway treadle assembly comprising a frame for installation in a roadway and an adapter plate for adapting a preexisting treadle frame are provided for mounting the treadle assembly across a surface portion of a roadway.
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