Patent ID: 6209210
Filing Date: 2001-04-03
Classification: G01C

Abstract:
A leveling rod for determining whether a point being surveyed is higher or lower than a bench mark elevation and for measuring how high or how low the point being surveyed is relative to the bench mark elevation, comprising:(a) a top unit and a bottom unit;(b) said top unit having:a reference member with a reference mark thereon;a scale member;a scale means on said scale member for indicating whether the point being surveyed is higher or lower than the bench mark elevation and for measuring how high or how low the point being surveyed is relative to the bench mark elevation;said reference member and said scale member adjacently slidably attached being vertically moveable relative to each other along a longitudinal axis;a coupling attached to the lower end of said top unit for detachably connecting said bottom unit; anda first clamp means for securing said reference mark at a point relative to said scale means;(c) said bottom unit having:a connecting member and a base member;said connecting member and said base member adjacently slidably attached being vertically moveable relative to each other along a longitudinal axis;a mate to said coupling of said top unit attached to the top end of said connecting member for connecting said top unit to said bottom unit;a bottom of said base member having a base end for engaging the point being surveyed; anda second clamp means for securing said base end a spaced distance from one of said reference mark and said scale means.