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Expired Canadian patentCanada

High ratio pressure reducing valve

CA 1160938 A · Owner: White Consolidated Industries, Inc. · Inventors: Schnall, Ira H.

CIPO record

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

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Abstract From the Canadian patent

P2174.01, ABSTRACT OF THE DISCLOSURE, The disclosure relates to a high ratio pressurereducing valve which generally comprises a high pressure fluid conduit means including an outlet portion and a fluid flow restrictor in direct fluid communication with the outlet portion. The fluid flow restrictor is provided with a valve plug which is operable to close the fluid flow restrictor to fluid flow, In accordance with a significant feature of the invention, a balancing element is associated with the valve plug and disposed within the conduit means such that a surface of the balancing element is exposed to the high pressure fluid whereby the balancing element tends to negate the high fluid …

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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 January 24, 1984. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended January 24, 2001.
  • We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
FiledJuly 11, 1980
GrantedJanuary 24, 1984
Term endedJanuary 24, 2001
Patent numberCA 1160938 A
Classification (IPC)G05D16/00 +2 more

Timeline

Timeline From CIPO dates

1981198419871990199319961999Application filedJuly 11, 1980Patent grantedJan 24, 1984Term endedJan 24, 2001

Sources & verification

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