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US 4,228,588 AGranted
Grade checker
OwnerLloyd E. Horton, Jr.inventor
Life of this patent
Estimating the term…
Abstract
A grade checker is disclosed to include a vertically disposed telescopic surveying rod, having graduations. A line reel is connected to the top end of a reciprocating rod, and a line guide is connected to the bottom of the recirpocating rod. There is a bull's -eye level on the surveying rod/handle to indicate "true" vertical. A line level on the line indicates "true" horizontal. When the end of the line is connected to a grade stake, and the surveying rod is adjusted, the final grade/cut or fill requirements can be determined.
Claims1
A grade checker instrument comprising;
- a vertically adjustable rod having a level and a scale thereon,
- a ground supported hollow shaft having a foot support attached thereto completely telescopingly enclosing and protecting said rod when in closed position and partially enclosing and protecting said rod when in extended position,
- a line guide attached to said rod,
- a handle means mounted on the top of said rod,
- a line reel having line thereon connected to the upper portion of said rod,
- the free end of said line having a loop formed thereon and being passed vertically downwardly through said line guide, then turned horizontally and passed through a line level and adapted to be attached temporarily to a grade stake for indicating grade level.
3 more elements
Dependencies are inferred from the claim text.