Log milling apparatus
AssigneeBruks Mekaniska AB
InventorHarding Tannerstal
Life of this patent
Estimating the term…
Abstract
In a milling apparatus for removing root swellings from timber logs the log is received on two spaced apart supports with the butt-end of the logs freely overhanging from the supports. A holder-on urges the log against the supports. The holder-on as well as the supports comprise means for rotating the log relative to the holder-on as well as the supports. Under the overhanging butt-end of the log a milling cutter cylinder is arranged for machining the rotating log on the bottom side of the log so as to remove the swellings but no useful wood material.
Claims21
A log milling apparatus comprising,
- means for receiving a log and supporting the same from below with the swelled root end thereof overhanging therefrom, said receiving means having spaced apart first and second ends defining the length thereof,
- means for rotating said log relative to said receiving means, and
- a milling cutter arranged beside said receiving means and under said overhanging root end of said log so as to machine said overhanging swelled root end of said log from below and along a line which is located in the extension of the length of said receiving means.
A log milling apparatus comprising means for receiving and supporting a log, said receiving means having spaced apart first and second ends defining the length thereof, means for urging said log against said receiving means, means for rotating said log relative to said receiving means and said urging means, and a milling cutter for machining said log, said urging means including a yoke having at least three sprocket wheels carrying an endless chain which has a substantially horizontal bottom part for engaging said log as well as at least one part being acted on by a spring-loaded shoe which tends to stretch said bottom part and against the action of which the latter part is deflectable in order to be adapted to various sectional sizes of the log.
A log milling apparatus comprising means for receiving and supporting a log, said receiving means having spaced apart first and second ends defining the length thereof, means for urging said log against said receiving means, means for rotating said log relative to said receiving means and said urging means, and a milling cutter for machining said log, said urging means being suspended at the free end of a guiding link system the control links of which are connected to means for detecting the level of said urging means and thereby the sectional sizes of the logs.
A log milling apparatus comprising means for receiving and supporting a log, said receiving means having spaced apart first and second ends defining the length thereof, means for rotating said log relative to said receiving means, and a milling cutter for machining said log, said milling cutter comprising a cylindrical body having working elements arranged on the envelope surface thereof, each working element comprising two identical halves, each having two opposite edge portions as well as a countersink for a mounting bolt, and being arranged in a recess in the envelope surface of said cutter, said recess having a curved convex support surface for said element which in turn has two correspondingly curved, concave abutting surfaces.
Dependencies are inferred from the claim text.