Depth control for endless chain type trencher
US4050171A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | May 12, 1976 |
| Grant date | Sep 27, 1977 |
| Priority date | — |
| Expiry date | May 12, 1996 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE02F5/145
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
The cutting depth of an endless chain type trencher is normally determined by the angle of the frame carrying the endless chain relative to the horizontal. In accordance with this invention, the angular position of the digging frame, hence the depth of the trench is controlled by the angular relationship of a trailing shoe carried by the digging frame relative to the digging frame. The trailing shoe has an elongated horizontal bottom surface that normally rides along the bottom of the formed trench. An upstanding mast is secured to the shoe at a point forwardly of the bottom surface and means on the top of the mast are utilized to indicate and control the depth of the trench.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.