Device for a felling and gripping unit
US4412777A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Mar 25, 1981 |
| Grant date | Nov 1, 1983 |
| Priority date | — |
| Expiry date | Mar 25, 2001 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB66C3/16
- WIPO fieldHandling
- WIPO sectorMechanical engineering
Abstract
Apparatus for suspending a tree felling and gripping unit on a jib, the unit having a frame, and the apparatus including a rotator between the jib and a felling and gripping unit for rotation of the unit relative to the jib, the rotator having a stationary portion and an inner portion rotatable about an axis, the rotatable portion having a lower end; a horizontal axle pivotally suspending the stationary portion of the rotator from the jib; a first hydraulic device connected between the jib and the stationary portion of the rotator for swinging the rotator about the horizontal axle; a further axle extending perpendicularly to the rotation axis of the rotatable portion of the rotator and pivotally suspending the frame of the unit from the lower end of the rotatable portion of the rotator; and a second hydraulic device connected between the rotatable portion of the rotator and the frame of the unit for swinging the unit about the further axle.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.