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Expired Canadian patentCanada

Shredding machine

CA 1294855 C · Owner: Frey, Oscar Martin · Inventors: Frey, Oscar Martin

CIPO record

Overview

Drawings and full text

Its claims, description and drawings are in the Canadian Patents Database.

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Abstract From the Canadian patent

Abstract of the Disclosure The machine disclosed is for shredding a cylindrical hay-bale. The bale (39) is rotated about its cylindrical axis (36), and is engaged tangentially by a rotary cutter (38) with centrifugal blades (52). The bale is rotated not, by the usual conveyor or drive belt but by discrete rollers. The machine has three roller (43) on the leading side of the cutter, and one roller (45) on the trailing side. The rollers are provided with bale-engaging teeth (72,76). The leading rollers and the cutter are positioned underneath the bale, for gravity-assisted engagement with the bale. The rotary cutter has shredder-blades (52) presented edge-on to the hay, which keeps the …

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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

  • Granted January 28, 1992. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended January 28, 2009.
  • We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
FiledJune 18, 1987
GrantedJanuary 28, 1992
Term endedJanuary 28, 2009
Patent numberCA 1294855 C
Classification (IPC)A01F29/00

Timeline

Timeline From CIPO dates

19881991199419972000200320062009Application filedJune 18, 1987Patent grantedJan 28, 1992Term endedJan 28, 2009

Sources & verification

Everything on this page comes from the CIPO record linked above. Contains information licensed under the Open Government Licence – Canada.