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Expired Canadian patentCanada

Universal seal cage lantern ring with double sided slotted land structure

CA 1337872 C · Owner: Champlin, George B. · Inventors: Champlin, George B.

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

A universal seal cage lantern ring (USCLR) is provided with a slotted land type structure on both sides of a flexible central web, with the USCLR being constructed in a continuous undefined length, so that lantern rings can be cut to size therefrom, with the USCLR being adapted to wrap around a shaft so as to form a single complete ring around any given size shaft for which it is cut The structure resembles an I-beam in which the I-beam flanges have been transversely slotted on both sides of the central web. When used for small diameter shafts, this structure prevents fracture or snapping of the ring due to the flexibility of the central web and the slots between lands on both sides of 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 January 2, 1996. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended January 2, 2013.
  • 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 29, 1989
GrantedJanuary 2, 1996
Term endedJanuary 2, 2013
Patent numberCA 1337872 C
Classification (IPC)F16J15/18

Timeline

Timeline From CIPO dates

19901993199619992002200520082011Application filedAug 29, 1989Patent grantedJan 2, 1996Term endedJan 2, 2013

Sources & verification

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