Woodworking – Process – Timber harvesting or processing
Patent
1985-07-22
1986-12-30
Bray, W. D.
Woodworking
Process
Timber harvesting or processing
144208E, B27L 100
Patent
active
046321640
ABSTRACT:
A rotation ring barker comprises a stator and a rotor which has an opening for lengthwise feeding of a log and which is associated with a number of working tools, each of which is actuated by a spring mechanism normally striving to maintain the tool yieldingly urged against a log passing through the rotor for removing the bark from the log. If necessary, the individual tools are jointly movable in a direction outwardly from the log against the action of said spring mechanism. Positioned between the rotor and stator is a ring element which is rotatably mounted on said rotor and, during normal operation, follows the rotor. The ring element is connected, via a transmission, with the drive shaft of a pump mounted on and constantly following the rotor. The stator has a braking device adapted to reduce, when need arises, the speed of the ring element relative to the speed of the rotor, preferably to zero, thereby to activate the pump via the transmission so that the pump may transmit to the working tool a force overcoming the pressure of said spring mechanism and causing the tool to swing outwardly away from the center of the rotor.
REFERENCES:
patent: 3667517 (1972-06-01), Bently et al.
patent: 4122877 (1978-10-01), Smith et al.
Bray W. D.
Soderhamns Verkstader AB
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