Measuring nail

Details Measuring nail Measuring nail

1997-07-09

1999-08-31

Bennett, G. Bradley

Geometrical instruments

Straight-line light ray type

Rod or target

33493, 116DIG16, G01C 1502

Patent

active

059437847

ABSTRACT:
This invention provides a measuring nail which can be prevented from being pulled out from a roadbed even when pushed down on the roadbed by a motorized grader, a macadam roller, a tired roller, a tire of a dump car carrying a pavement material or a foot of a worker, to provide an improved working efficiency.
The measuring nail of this invention comprises a nail body embedded in a roadbed and a rod-like elastic member engageable with a top end of said nail body.

REFERENCES:
patent: 3973327 (1976-08-01), Cardinale
patent: 4141310 (1979-02-01), Rich, Jr.
patent: 4926785 (1990-05-01), Lamson
patent: 4972591 (1990-11-01), Hammet
patent: 5052329 (1991-10-01), Bennett
patent: 5174237 (1992-12-01), Beard
patent: 5205236 (1993-04-01), Hughes
patent: 5207175 (1993-05-01), Andonian
patent: 5501170 (1996-03-01), Walsh

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