Powered caulking gun
CA 2185451 C · Owner: Wagner Spray Tech Corporation · Inventors: Jerdee, Jeffrey S.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A cordless electric powered caulking gun (10) includes a ball drive rod (30) having a helical thread (32) and a keyway (34). An electric motor (38) and gear reducer (42) is coupled to a spur gear (44) keyed to the ball drive rod (30). A cylindrical ball retainer (54) having a plurality of pockets (66) located on a helical locus aligned with the helical thread (32). A ball drive nut (82) is telescoped over and is selectively movable between a first and second position with respect to the ball retainer (54). A trigger (26) is coupled to the ball drive nut (82) via a spring (130) to urge the nut (82) from the first position to the second position when the trigger (26) is actuated. The ball …
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 10, 1995 and granted December 7, 1999. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended April 10, 2015.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by April 10, 2017.
- 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.