Motor grader drawbar assembly with fluid-operated cylinders for restraining circle gear
US3989112A · kind A · utility
13Cited by
5References
7Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jul 9, 1975 |
| Grant date | Nov 2, 1976 |
| Priority date | — |
| Expiry date | Jul 9, 1995 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE02F9/22
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
The motor grader drawbar assembly has a blade mounted on a circle gear and a drive unit operatively connected to the circle gear to selectively rotate it and the blade. A plurality of radially mounted pistons operate against an upright wall of the circle gear to provide a brake and/or locking mechanism. The pistons, and their accompanying cylinders, are mounted in members which also underlie and support the circle gear. Thus, the vertical position of the circle gear is not affected by the braking operation. A hydraulic circuit is provided to alternately operate the drive unit and the braking operation.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.