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Expired Canadian patentCanada

Locking device

CA 1114753 A · Owner: Decoto Aircraft, Inc. · Inventors: Helm, James D.; Gellerson, Walter G.

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 mechanical locking device includes multiple components that must move before axial travel of a load exerting component becomes unblocked. Such elements include a main lock means that is radially movable to unblock said axial travel; axially movable holder means that blocks radial movement of the main lock means;, radially movable trigger means that blocks axial movement of the holder means; and release structure blocking radial movement of the trigger means. At least one and preferably both of the main lock means and of the trigger means comprises multiple elements spaced apart about the device axis for independent radial movement, such elements typically being caged for such independent …

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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 December 22, 1981. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended December 22, 1998.
  • We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
FiledNovember 14, 1979
GrantedDecember 22, 1981
Term endedDecember 22, 1998
Patent numberCA 1114753 A
Classification (IPC)B66F1/02 +1 more

Timeline

Timeline From CIPO dates

1980198219841986198819901992199419961998Application filedNov 14, 1979Patent grantedDec 22, 1981Term endedDec 22, 1998

Sources & verification

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