Tool with selectively-biased member
CA 2594933 C · Owner: Woodruff, David C. · Inventors: Woodruff, David C.; Weidmer, Stan C.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A tool (2) for working a workpiece has a slot (30) provided between a pair of extremities (26) at its distal end (6). The extremities have cutting blades (20) mounted thereon. The slot is configured to receive a plate (40A). The tool has a conduit (8) running along its axis for communication of pressurized fluid (72) to the slot and plate. The plate directs flow of the pressurized fluid outward toward the extremities. The resulting outward force causes the extremities to bend outward, thereby urging the cutting blades outward for cutting, reaming, or other working of the workpiece. The resilience of the tool causes the extremities to return back inward when the fluid pressure is …
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 January 12, 2006 and granted September 25, 2012. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended January 12, 2026.
- Certificates of supplementary protection extend only drug patents, and it isn't classified as one.
- 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.