Automatic duct welding machine
CA 1237486 A · Owner: Ductmate Industries, Inc. · Inventors: Arnoldt, Fredrick J.; Arnoldt, Peter J.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A welding gun of an arc welding machine is mounted for vertical reciprocal movement on a movable frame portion. The movable frame portion is connected to a stationary frame portion by piston cylinder assemblies which upon actuation raise and lower the movable frame portion into and out of position for locating the welding gun in position for welding together a pair of longitudinal sheet metal member edges positioned in a preselected relationship on the stationary frame portion. A pair of clamp plates are carried by the movable frame portion. When the movable frame portion is lowered, the clamp plates are positioned oppositely of the pair of sheet member edges respectively to move into and …
Read the whole patent
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 May 31, 1988. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended May 31, 2005.
- We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
Timeline
Timeline From CIPO dates
Sources & verification
Official CIPO records
Everything on this page comes from the CIPO record linked above. Contains information licensed under the Open Government Licence – Canada.