Selectively rotatable cylinder for a lock
CA 1076380 A · Owner: Schlage Lock Company · Inventors: Schlage, Ernest L.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A selectively rotatable cylinder for a lock has a cylinder housing with a bore extending along an axis. A cylinder plug having a keyway wherein is rotatable in the bore about the axis. The plug is connected to a driving means for actuating any connected lock mechanism. In the cylinder body and cylinder plug are pin tumblers adapted to be positioned by a key in the keyway. An upper tumbler pin in the cylinder body is spring-pressed toward the keyway. A portion of the cylinder plug in the transverse plane of the upper tumbler pin is cut away to provide a substantially chordal cam surface or ramp extending from the periphery of the plug to a radially inward intersection with the keyway. The …
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 April 29, 1980. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended April 29, 1997.
- 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.