Cam operated timer
CA 2207314 C · Owner: Weaver, Robert Francis · Inventors: Burgin, Henry Earl; Weaver, Robert Francis; Amonett, Daniel Keith
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
An appliance timer has features to facilitate automated assembly or manual assembly. A timer housing base accepts timer components from two directions and , installation of, components in either direction is along a straight axis. A motor in the timer engages a, gear train which runs a drive cam. The drive cam imparts motion to a camstack which, then engages timer blade switches and the blade switches operate the , appliance. A subinterval is also supplied on the timer to allow periodic operation of a switch without the, use of the camstack. The timer also features a quiet manual advance which removes the, blade switches from communication with the camstack to allow an operator to …
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 May 28, 1997 and granted February 22, 2000. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended May 28, 2017.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by May 28, 2019.
- 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.