Safety lock
CA 2229473 C · Owner: Gonser, Gerhard · Inventors: Fuss, Fritz Helmut; Gonser, Gerhard
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A safety lock, particularly a self-locking lock has at least one lock, catch and a bolt operable by means of a lock cylinder and a split latch nut. In order to create a particularly inexpensively-manufacturable and relatively-narrow safety lock, a coupling device is provided with two congruent racks which can be arranged in a panic or freewheel function. The racks are superimposed and mesh with the, respective teeth of an inner nut and an outer nut. An electromagnetic coupling is achieved with the aid of a coupling lever which is fixable to each rack directly or indirectly, subject to the function of the particular rack and engageable with detents, of the racks.
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 February 13, 1998 and granted February 12, 2002. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended February 13, 2018.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by February 13, 2020.
- 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.