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Expired Canadian patentCanada

Mig welder attachment for an electric hand drill

CA 1282841 C · Owner: Hayes, Peter F. · Inventors: Hayes, Peter F.

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 dielectric cover (30) is detachably coupled to an electric hand drill (12) of pistol form with a front portion extending beyond the drill shaft projecting from the front end of the drill casing. The cover acts as a torque tube to support a right angle drive reduction gear mechanism (38) which terminates in a drive wheel (65) rotating about an axis perpendicular to the drill shaft axis (24) and within a friction drive mechanism, completed by spring biased idler wheel (54) pressing against the drive wheel. Metal blocks (42a 42b) mounted to the cover (30) connect to one side of a DC source (122, 122) and mount a wire guide (44) for guiding a thin wire first electrode (90) into contact with …

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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 9, 1991. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended April 9, 2008.
  • We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
FiledOctober 15, 1987
GrantedApril 9, 1991
Term endedApril 9, 2008
Patent numberCA 1282841 C
Classification (IPC)B23K9/10 +1 more

Timeline

Timeline From CIPO dates

1988199119941997200020032006Application filedOct 15, 1987Patent grantedApril 9, 1991Term endedApril 9, 2008

Sources & verification

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