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Expired Canadian patentCanada

Mixer valve with hard material plaques, having a movable cartridge loaded by the water pressure

CA 1239073 A · Owner: Knapp, Alfons · Inventors: Knapp, Alfons

CIPO record

Overview

Drawings and full text

Its claims, description and drawings are in the Canadian Patents Database.

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Abstract From the Canadian patent

A mixer valve comprising a valve body control means, a chan-, geable cartridge inserted into the body of the valve a fixed hard, material plaque mounted in the cartridge and a movable plaque, housed in the cartridge connected to the control means and intended to cooperate with the fixed plaque to carry out the regulation of the flow rate and the mixing ratio, and wherein the changeable cartridge is contained in the body of the valve with an axial clearance; the cartridge carries peripherally near its inner end, a, gasket intended to radially seal in a corresponding bore of the valve body; there is provided a sealing union acting between the cartridge and one of the water inlet pipes; the …

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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 July 12, 1988. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended July 12, 2005.
  • We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
FiledMay 8, 1985
GrantedJuly 12, 1988
Term endedJuly 12, 2005
Patent numberCA 1239073 A
Classification (IPC)F16K11/06 +2 more

Timeline

Timeline From CIPO dates

1986198819901992199419961998200020022004Application filedMay 8, 1985Patent grantedJuly 12, 1988Term endedJuly 12, 2005

Sources & verification

Everything on this page comes from the CIPO record linked above. Contains information licensed under the Open Government Licence – Canada.