Replaceable stick blade with system for interlocking with reusable shaft
CA 2094741 A1 · Owner: Heyduk, Henry · Inventors: Heyduk, Henry
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A replaceable stick blade is to be fitted with a reusable hollow ended shaft. The blade itself has a shaft fitting shank with a releasable interlock system comprising a blind ended recess in one side of the shank a first, threaded member held against rotation in the blind ended recess and a second threaded member movable radially of the shank between a shaft release and a shaft locking position by threading inwardly and outwardly of the first threaded member.
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
- Filed April 23, 1993. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended April 23, 2013.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by April 23, 2015.
- 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.