Walking foot feed for sewing machines
CA 1180604 A · Owner: Porter, Robert E. · Inventors: Porter, Robert E.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The specification describes a top feed for a sewing machine and in particular a top feed of the walking-foot variety. A drive system and linkage is used which permits the use of existing drive components of conventional machines to be adapted to the driving of a walking foot. No separate drive system or multiple drive shafts are involved. Lifting of the walking foot as required is effected by the main drive system which also, of course, provides the needle drive and others, such as the knife arm drive.
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 January 8, 1985. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended January 8, 2002.
- 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.