Sheet metal cutting device for arcs and circles
CA 1112998 A · Owner: Isaac, Dalton · Inventors: Isaac, Dalton
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A self-contained sheet metal cutter is mounted on a wheeled dolly and includes upper and lower power driven shear cutting wheels between which is engaged the plate or sheet to be cut. An adjustable trammel assembly extends from the dolly and includes a centre point member engageable with an aperture in the plate to be cut and which corresponds to the centre of the arc or circle. The trammel is adjustable to the radius of the arc or circle and the centre point is engaged with the aperture in the sheet whereupon the wheeled dolly is pushed manually around the arc or circle as the shear wheels cut the sheet to the preset radius arc or circle. The rear wheel of the dolly is castor so that it …
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 November 24, 1981. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended November 24, 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.
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.