Grader blade with tiered inserts on leading edge
US4770253A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Feb 20, 1987 |
| Grant date | Sep 13, 1988 |
| Priority date | — |
| Expiry date | Feb 20, 2007 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE02F9/285
- WIPO fieldCivil engineering
- WIPO sectorOther fields
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.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.