Changeable key cylinder padlock
CA 1283789 C · Owner: Lainhart, Gregory C. · Inventors: Lainhart, Gregory C.; Evans, Walter R.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A changeable plug padlock including a padlock casing a, shackle moveable between a lower locking position and a upper release position, the casing having a central substantially cylindrical plug cavity therein located between the sockets shaped to receive and removably house a key lock plug. The lock plug located in the plug cavity has a first key position and is operable by an operator key and control key to rotate to second and third key positions respectively. Locking spheres are positioned when the lock cylinder occupies the first key position to hold the shackle in the lower locking position and release the shackle at the second and third key positions for movement to said upper …
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 7, 1991. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended May 7, 2008.
- 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.