Engaging lever lock for rotor turning gear
CA 2035985 C · Owner: Berrong, David Bruce · Inventors: Berrong, David Bruce; Hyde, Gilbert Frederick
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
An engaging lever lock for rotor turning gear in a steam turbine includes a selectable lock that is diseased to hold the lever at its engaged position and control circuitry for activating the selectable lock. With a first embodiment the selectable lock includes an electromagnet. On the other sand, with a second embodiment, the selectable lock includes a plunger-pin arrangement that is activated by a solenoid to extend into a hole farmed in the lever and is biased toward, a retracted position away from the hole by a spring which is disposed around the pin between the plunger and the solenoid.
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 8, 1991 and granted April 10, 2001. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended February 8, 2011.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by February 8, 2013.
- 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.