Grade determining method and apparatus

Details Grade determining method and apparatus Grade determining method and apparatus

1993-12-13

1995-09-19

Reese, Randolph A.

Earth working

With indicating or sighting means

33263, 33285, 33288, 37906, A01B 3920, A01B 3520

Patent

active

054509092

ABSTRACT:
A method and apparatus for determining the degree of grade ( slope ) upon which an earth moving machine is operating wherein a movable sighting device is mounted on the machine in such manner that the forces of gravity cause the device to move such that an operator looking at external reference objects may control and confirm the angle of grade ( slope ) of the earth being worked upon.

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patent: 4919214 (1990-04-01), Brown
patent: 5094001 (1992-03-01), Fraser
patent: 5146686 (1992-09-01), Brown

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