Earth working – Tool – standard or connection – Tool is transversely elongated blade
Patent
1987-02-20
1988-09-13
Johnson, Richard J.
Earth working
Tool, standard or connection
Tool is transversely elongated blade
37141R, 172747, 175410, E02F 3815, E02F 928
Patent
active
047702532
ABSTRACT:
A grader blade has a steel body with a bottom edge incorporating a pair of tiered, elongated carbide inserts in a forward portion thereof. The carbide inserts, being arranged in a tiered contacting relationship, are disposed in a stepped recess formed in and along the forward portion of the bottom edge of the blade body and brazed to the blade body and to each other so as to project forwardly and downwardly from the recess. A front one of the tiered inserts is composed of a cemented carbide composition having a high cobalt content, for instance 20 percent by weight, adapting it for enhanced impact wear resistance, whereas a rear one of the tiered inserts is composed of a cemented carbide composition having a low cobalt content, for instance 11.5 percent by weight, adapting it for enhanced downpressure wear resistance.
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Kengard A. Grader Blades (WS 85-24) published 1985.
Publication: Kengard A. Grader Blades dated 8/1983 by Kennametal, Inc.
Hallissy Robert P.
Isakov Edmund
Kita John F.
Stephenson Earle W.
Johnson Richard J.
Kennametal Inc.
Trempus Thomas R.
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