Rotary shredding apparatus
CA 1280392 C · Owner: Groves, Harold J. · Inventors: Groves, Harold J.; Williams, Robert M.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A rotary shredding apparatus having in combination counterrotating cutter supporting shafts operated by a reversible fluid pressure driven motor and a fluid flow circuit connected to the reversible motor and including a pump supplied source of fluid at a predetermined nominal operating flow rate a fluid, pressure responsive relief valve operative for fluid flow exceeding said predetermined nominal operating flow rate to return fluid to the source and a fluid, flow directing valve connected in fluid flow relation between said relief valve and said fluid driven motor and control connected to said fluid flow directing valve means; a fluid flow rate detecting sensor disposed in said hydraulic …
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 February 19, 1991. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended February 19, 2008.
- 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.