Measuring device for a hay baler
CA 2217317 C · Owner: Mcpherson, Bobby Roy · Inventors: Mcpherson, Bobby Roy
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Hay bale measuring apparatus utilizes two measuring wheels for measuring the string used by the baler and indicating the amount of, string to a control and display unit. The baler operator sets the desired hay bale size and monitors the baler operation on the display. The control and display unit generates a signal which indicates to the baler when it is time to tie off a bale of hay. The measuring wheel includes a plurality of teeth and is used with an optical beam generator and optical beam detector. String is wrapped once around the wheel and turns the wheel as it is pulled by the baler. As the wheel turns the teeth interrupt the beam, from the beam generator forming a series of bursts …
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
- Filed October 3, 1997 and granted November 28, 2000. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended October 3, 2017.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by October 3, 2019.
- 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.