Molded ball/seal
CA 2002197 A1 · Owner: Barber, Michael · Inventors: Barber, Michael
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A solenoid valve includes a flexible diaphragm and ball to control hydraulic or pneumatic fluid flow. The diaphragm provides an essential part of a complete seal which prevents contaminants from adversely affecting operation of the valve. The diaphragm and ball are formed into a single impervious integral structure. The valve additionally includes a series of radially arranged flutes which surround the armature to allow movement of entrapped fluids within the valve so as to enable more rapid actuation of the valve and also a conical end structure within the armature for similar improvement.
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 November 3, 1989. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended November 3, 2009.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by November 3, 2011.
- 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.