B - Operations – Transporting – 23 – B
Patent
B - Operations, Transporting
23
B
77/42, 9/70
B23B 47/28 (2006.01)
Patent
CA 1249905
ABSTRACT WOOD PRESERVATION A wooden frame is treated with preservative by forming one or more channels in the members making up the frame and filling the channels with a flowable preservative through an orifice which is thereafter closed off by means of a blanking plug. This plug can be removed later to enable the channel to be re-filled. The treatment can therefore be carried out on a painted frame. A drill jig for making the channel comprises a body (10) having a first or perpendicular guide bore (20), a second or oblique guide bore (22) and a third or vertical guide bore (24). The guide bores (22) and (24) intersect in a cylindrical locating spigot (18) and the axes of the guide bores (20) and (22) intersect in the timber to be drilled. A collet (26) on the shank of the drill bit (28) limits the depth of penetration by the lower face (32) of the collet abutting an abutment face (34) on the body (10). The depth of penetration when using the guide bore (20) or (24) is limited by the collet (26) coming into abutment with an adjustable stop (38) on the body (10). No adjustments are necessary as between drilling perpendicular or oblique bores and it is ensured that the bores formed in the timber intersect to form a continuous channel for receiving flowable preservative.
485201
Channelwood Preservations Limited
Gowling Lafleur Henderson Llp
LandOfFree
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