Log joint and machine for forming log joint
CA 1264644 C · Owner: Wrightman, Ronald A. · Inventors: Wrightman, Ronald A.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Log joints and a machine for cutting and drilling logs to provide log joints is disclosed herein. In a tongue and groove log joint a seal seating channel is formed in the base of the longitudinal groove and a resiliently flexible seal is seated in the seal seating channel. A slot may also be cut in the base to accommodate a reinforcing metal rod. In a but joint in which a second log underlies the butting logs a seat is formed in the edge of the second log in alignment with the locking slots of the but joint to receive an end of the locking Pin. The seat cooperates with the end of the locking pin to lock the locking pin against longitudinal movement with respect to the second log. In a small …
Read the whole patent
Listed from its CIPO record in Patent Yard's archive of Canadian patents past their term. Its claims, description and drawings are in the CIPO record and on Google Patents, and the Claude kit works from them.
Why it's free to use
- Granted January 23, 1990. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended January 23, 2007.
- We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
Timeline
Timeline From CIPO dates
Sources & verification
Official CIPO records
Everything on this page comes from the CIPO record linked above. Contains information licensed under the Open Government Licence – Canada.