Auto-return function for a bulldozer ripper
US5685377A · kind A · utility
41Cited by
7References
5Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Sep 5, 1996 |
| Grant date | Nov 11, 1997 |
| Priority date | — |
| Expiry date | Sep 5, 2016 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE02F9/2041
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
An apparatus controls the movement of a ripper for a machine. Tilt and lift cylinders controllably actuate the ripper. Hydraulic control valves control the flow of hydraulic fluid to the respective cylinder. An auto-return button produces an auto-return signal in response to being depressed by the machine operator. A controller receives the auto-return signal and delivers a ripper control signal to the hydraulic control valves to automatically raise the ripper to a predetermined position.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.