Plug valve
CA 1056792 A · Owner: Worcester Controls Ag · Inventors: Dykes, Charles H.; Norris, Lewis H.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Abstract of the Disclosure A valve, of the type employing a plug rotatable through substantially 90° between open and closed valve positions, employs a plug which has an elongated configuration along its axis of rotation with the opposing ends of said elongated plug each exhibiting a spherical, ellipsoidal or other curved, configuration that merges smoothly into the elongated sides of the plug. The plug is provided with a passageway which is elongated in the direction of elongation of the plug and which extends through the plug in a direction transverse to the axis of rotation of the plug. The plug surface is sealed relative to the valve housing by at least one continuous seat of elongated …
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
- Granted June 19, 1979. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended June 19, 1996.
- 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.