Hand screw clamp
CA 2108529 C · Owner: Petersen Manufacturing Co. Inc. · Inventors: Sorensen, Joseph A.; Beckmann, Toby J.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A hand screw clamp includes first and second jaws and a pair of threaded rods, each having a handle for manual rotation. Two first couplers are mounted to the first jaw and coupled to the threaded rods and two, releasable couplers are mounted to the second jaw and coupled to the threaded rods. The releasable couplers each include a threaded portion engageable with the threaded rods and a slidable portion sized to accommodate sliding movement of the threaded rods. A push plate is movably mounted to the second jaw and engaged with both of the releasable couplers. This push plate is movable between a first position in, which both of the threaded portions are engaged with the rods and manual …
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 October 15, 1993 and granted December 12, 2000. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended October 15, 2013.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by October 15, 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.