Chain bar for a power chain saw
CA 1254490 A · Owner: Leith, William C. · Inventors: Leith, William C.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A POWER CHAIN SAW by William Cumming Leith, a Canadian citizen whose postal address is P.O. Box 157, Trail, B.C. Canada V1R4L4 ABSTRACT, An improved chain bar for a power chain saw consists of a replaceable chain bar with at least one thru-slot with a machined slot edge profile. The thru-slot is filled with a damping insert with matching insert edge profile and made of at least one damping material which retains the maximum energy efficiency for wood sawing, but damps out up to 95 % of the combined longitudinal tension/compression and transverse/ lateral bending resonant vibrations going to the hand grips and hence to the operator's fingers. The size of a thru-slot expressed as its diameter …
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 May 23, 1989. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended May 23, 2006.
- 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.