Machine for forming cylindrical bales of crop
CA 2017647 C · Owner: Viaud, Jean · Inventors: Roth, Arsene; Viaud, Jean; Anstey, Henry Dennis
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Abstract of the Disclosure, A baling machine includes a variable volume baling chamber with which there is associated a hydraulic tension cylinder containing fluid in its rod end for resisting expansion of the baling chamber. A high pressure relief valve is connected in circuit between the opposite ends of the cylinder for permitting fluid transfer between the ends in accordance with the pressure setting of the valve. A low pressure relief valve is connected in circuit between the opposite ends of the tension cylinder so as to be in parallel with the high pressure relief valve. A mode select valve is located in circuit between the tension cylinder and the low pressure relief valve and is …
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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
- Filed May 28, 1990 and granted November 9, 1993. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended May 28, 2010.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by May 28, 2012.
- 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.