Baling machine with air spring means for maintaining apron tension
CA 1203420 A · Owner: Sperry Corporation · Inventors: Campbell, Willis R.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
In a roll baling machine having an apron movable in suitable manner to form roll bales of crop material air springs, are used to maintain tension in the apron. The air springs each include an air bag and a piston. The air pressure in the air bags is adjustable in order to adjust the tension in the apron.
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 April 22, 1986. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended April 22, 2003.
- 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.