Valve with enhanced rangeability and logarithmic flow characteristic
CA 1328792 C · Owner: Pfeiffer, Robert W. · Inventors: Pfeiffer, Robert W.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A control valve well-suited for controlling the flow of particulate solids comprises a valve body having a flow passageway comprising inlet and outlet passages extending transversely to a slide chamber. A plug member having a flow orifice is mounted for movement, within the slide chamber to seal the flow passageway when the flow orifice is out of registration therewith and to connect the inlet and outlet passages in flow communication when registered therewith. The flow orifice is of ovoid cross section having in, cross section a tapered slot portion which terminates in an apex subtending an angle of about 60 degrees and a circular arc base portion subtending about 240 degrees of arc. This …
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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 April 26, 1994. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended April 26, 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.