Control system for a walk behind trencher machine
US5212896A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | May 15, 1992 |
| Grant date | May 25, 1993 |
| Priority date | — |
| Expiry date | May 15, 2012 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T74/20238
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
A control system for regulating starting and various operations of a walk behind and self-propelled trencher. The control system conditions the trencher for forward, neutral, and reverse operation through use of a single control lever mounted for sliding movement in a common plane extending between a neutral/start position and a drive position and thence in another plane to forward or reverse positions to control the direction of the trencher. When the control lever is in a neutral/start position, a power assembly on the trencher is ineffective to drive wheels used to propel the trencher across a field. When the control lever is shifted to a drive position, a drive path is established between the power assembly and at least one of the wheels on the trencher. The control system is configured to allow the power assembly to be started only when the control lever is in a neutral/start position and prevents starting of the power assembly when the control lever is in other than a neutral/start position. The control system further includes a chain assembly control member whose position relative to a disengaged condition regulates operation of an endless digging chain assembly mounted on t…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.