Crimp seal pleated filter assembly
CA 1259041 A · Owner: Donaldson Company, Inc. · Inventors: Kruse, Barbara L.; Gronli, Darrell D.; Gronholz, Donald D.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A crimp seal pleated filter assembly having a base (20), a frame (40) and a filter media (60) including a plurality of pleats (66). When assembled the pleats (66) of the filter media (60) are uniformly aligned within the assembly 10 and are secured therein by crimp sealing the filter media ends (62) between interlocking projections (30) 50 on the sides (23) of the base (20) and side walls 43 of the frame. Outboard end flaps (68) of the filter are crimp sealed and encapsulated between side blades (26) of the frame (20) and the front wall (42) and back wall (44) of the frame minimizing flaking or chafing of fibers from the filter (60).
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 September 5, 1989. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended September 5, 2006.
- 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.