Device for detachable coupling of an implement to the operating arm of an excavator
CA 2289516 A1 · Owner: Blomgren, Stig · Inventors: Blomgren, Stig
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A device for the coupling of an implement (1) to the operating arm of an excavator, comprising an operating arm attachment (25) and a locking member (50) with a hydraulic cylinder (51) and a control unit (41) for supplying the cylinder with an operating pressure, the cylinder having double pistons (57 58) with piston rods (52, 53) forming locking wedges wherein the pressure , area of the piston is greater on the plus side for locking than on the minus side for opening, said device also comprising an implement attachment with coupling members (4, 5) and locking elements (80 81) by means of which the , implement attachment is coupled to the operation-arm attachment under the influence …
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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
- Filed May 13, 1998. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended May 13, 2018.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by May 13, 2020.
- 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.