Void/lift meter
Number of patents in Portfolio can not be more than 2000
United States of America Patent
Stats
-
Jan 3, 1989
Grant Date -
N/A
app pub date -
Sep 9, 1987
filing date -
Sep 10, 1986
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
There is provided a void/lift meter (10) comprising a shaft (14) extending from a base member (13) and a bracket (16) having a claw portion (22) and upper and lower portions (17),(18) disposed on said shaft for axial movement therealong. An arm (24) is slidably mounted in said bracket and is formed with a second claw portion (27) at one end which portion is biased towards said first claw portion (22) for clamping therebetween a rail. Between the upper and lower portions (17),(18) is a collar which is a friction fit on said shaft. The meter is used to measure the void under a railway sleeper and to ensure that the track is jacked up to the correct height to allow extra ballast to be introduced under the sleeper.
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Cited Art Landscape
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