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Expired Canadian patentCanada

Constant percentage flow divider

CA 1267348 C · Owner: Alliedsignal Inc. · Inventors: Leathers, Thomas M.; Portolese, Larry A.

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 flow control device (12) for supplying first and second fluid distribution systems (16 and 18) with a constant percentage of fluid flowing from a single source of fluid (14). A housing (20) has a first bore (28) and a second bore (52) with a semi-cylindrical shaft (38) located in the first bore (28) to establish the relationship between fluid flow from an inlet orifice (32) and first and second outlet orifices (34 and 36). A shuttle valve (58-60) in the second bore (52) responds to the fluid flow from the first and second outlet orifices (34 and 36) and the respective back pressure to maintain the fluid flow through the first and second fluid distribution systems (16 and 18) in the same …

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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 3, 1990. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended April 3, 2007.
  • 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 27, 1987
GrantedApril 3, 1990
Term endedApril 3, 2007
Patent numberCA 1267348 C
Classification (IPC)G05D11/03 +1 more

Timeline

Timeline From CIPO dates

1988199019921994199619982000200220042006Application filedMay 27, 1987Patent grantedApril 3, 1990Term endedApril 3, 2007

Sources & verification

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