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Expired Canadian patentCanada

Pneumatic impulse valve

CA 1306169 C · Owner: B.F. Goodrich Company (The) · Inventors: Hohenshil, Robert Noel; Putt, James Craig

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 rapid acting valve capable of delivering a high pressure impulse of compressible fluid had a pilot section, an intermediate section and an output section which are pressurized to approximately equilibrium with the inlet pressure during the load portion of the operating cycle and which cooperate to provide extremely rapid full opening of the output section to release fluid under pressure from an accumulator through an output section piston seat. The valve is particularly suitable for use in combination with pneumatic impulse separation systems such as those employed for deicing aircraft surfaces. 8283e

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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 August 11, 1992. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended August 11, 2009.
  • We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
FiledApril 21, 1989
GrantedAugust 11, 1992
Term endedAugust 11, 2009
Patent numberCA 1306169 C
Classification (IPC)B64D15/16 +1 more

Timeline

Timeline From CIPO dates

1990199219941996199820002002200420062008Application filedApril 21, 1989Patent grantedAug 11, 1992Term endedAug 11, 2009

Sources & verification

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