Lever handle mortise lock
CA 1257311 A · Owner: Best Lock Corporation · Inventors: Carey, Kevin L.; Foshee, William R.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
An improved mortise lock is provided with spring means for independently returning each of the inside and outside lever handles from a rotated operating position. The mortise lock includes a latch bolt that is slidably mounted in a lock case and biased to a projected position through the edge face of such case. Inside and outside operating hubs are independently rotatably mounted coaxially in the case and operable respectively by the inside and outside lever handles or knobs. A retraction lever extends from a pivot in the case past the hubs and into retracting engagement with the tailpiece of the latch bolt. Each operating hub is formed to include at least one hub camming surface. Each hub …
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 July 11, 1989. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended July 11, 2006.
- 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.