Helical conveyor food freezer
CA 2072146 C · Owner: Sink, Brian Evan · Inventors: Sink, Brian Evan; Lang, Gary Dee
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A freezer (10) includes an insulat-, ed enclosure (12) for maintaining low temperatures therewith and a conveyor, belt (20) that carries food products throughout the enclosure (12). The conveyor belt (20) includes a straight-line path section (40) and at least one helical path section (22a) and is driven by vertical drive elements (32) carried by a rotating drum (28) about which the conveyor helical path section (22a) is located. Upon entering a helical path section (22a) from a straight-line path section (40) the, conveyor belt (20) undergoes expansion only, with the inner ends of its transverse rods (52) maintaining a precise spacing which allows smooth interengagement, between heads at …
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 November 6, 1990 and granted March 11, 1997. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended November 6, 2010.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by November 6, 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.