| 摘要 |
A valve position indicator for buried valves having a rotatable operator shaft extended to ground level. A pipe upright is positioned about the operator shaft and extends to ground level. An indicator housing is non-rotatably mounted in the pipe near ground level and a bearing engages the housing and the operator shaft for transferring side loads from the shaft through the housing to the pipe. A self-contained, sealed indicating gear box unit is slidably mounted over the upper end of the extended operator shaft, with a driving gear rotatably coupled with the operator shaft. The gear box has an outer portion coupled with the the housing, locking the gear box non-rotatably to the housing. The gear box unit has an interior indicia carrying gear movable circumferentially about the gear box less than 360 DEG for multiple turns of the operator shaft, and the gear box has an outer top cover having stationary indicia positionable relative to the indicia carrying gear so as to be indicative of open and closed positions of the valve, the top cover being transparent to permit visual observation therethrough of the relative position of the interior indicia carrying gear.
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