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Expired Canadian patentCanada

Pressure vessel with improved diaphragm mounting

CA 1206838 A · Owner: Smith (A. O.) Corporation · Inventors: Schurter, Robert M.; Richter, Karl W.

CIPO record

Overview

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

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Abstract From the Canadian patent

A pressure vessel includes a pair of shells which are suitably joined together. A flexible diaphragm is disposed within the vessel and sealingly mounted to the vessel walls adjacent the joint. The lower shell wall has a radially outwardly extending offset and bulge forming an interior groove for receiving a projection on the diaphragm. The bulge merges into an inwardly tapered wall which in turn merges into an axial cylindrical wall having a terminus edge . The upper shell wall has a pair of spaced radially inwardly extending offsets The upper of said pair of offsets provides an abutment receiving the terminus edge of the lower shell. An axial cylindrical wall between the pair of inward …

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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 2, 1986. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended July 2, 2003.
  • We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
FiledAugust 23, 1983
GrantedJuly 2, 1986
Term endedJuly 2, 2003
Patent numberCA 1206838 A
Classification (IPC)F16L55/04 +2 more

Timeline

Timeline From CIPO dates

1984198619881990199219941996199820002002Application filedAug 23, 1983Patent grantedJuly 2, 1986Term endedJuly 2, 2003

Sources & verification

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