Working machine attachment attaching and detaching device
CA 2286529 A1 · Owner: Komatsu Ltd. · Inventors: Naka, Tadahiro; Sakurai, Noayuki
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A structurally simple working machine attachment attaching and detaching device is provided. For this purpose the device includes a first member (1) rotatable around the forward end of a working machine arm (3) by a hydraulic cylinder (4) and a second member (2) hanging down at the forward end of the first member (1). With respect to a third and fourth cross-pins (P3, P4) each provided in a working machine attachment (5), the third cross-pin (P3) is freely engaged in the vicinity of the basic end of the first member (1) and the fourth cross-pin (P4) is freely engaged at the forward end of the second member (2), the second member (2) including a hook (9A) almost the center of which is …
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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 October 18, 1999. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended October 18, 2019.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by October 18, 2021.
- 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.