Key member for retaining a control valve in a hub
CA 2016419 C · Owner: Dodd, Thomas Earl · Inventors: Fecher, Douglas Allen; Dodd, Thomas Earl
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A control valve arrangement for a pressure differential operated servomotor wherein a key member is located in a slot in a hub to retain the control valve and position the control valve in a position to isolate a first chamber from a second chamber in the absence of an input force being applied to operate the valve. The control valve in response to an input force immediately moves to initiate the development of the pressure differential and as a result substantially eliminates the operational time to effect a brake application.
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 9, 1990 and granted August 4, 1998. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended May 9, 2010.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by May 9, 2012.
- 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.