Articulated telescopic boom having slide-through knuckle
CA 2246537 C · Owner: Skyjack Equipment, Inc. · Inventors: Cullity, Richard E.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
An articulated telescopic boom assembly (12) for a lifting device (10) includes a first elongated boom (20) having a central longitudinal axis and an opening in one end; a second elongated boom (22) having a first end (86 88) , normally telescopically received by and extensible from the first boom (20) opening, the first end (86, 88) having at least one elongated pivot guide slot therein having a central longitudinal axis with an open end remote from the first end and a closed end proximate to the first end; and a slide-through knuckle (38) having a housing (40) with an opening therein for receiving the second boom (22) during extension and retraction thereof. The housing (40) 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 February 25, 1997 and granted January 9, 2001. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended February 25, 2017.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by February 25, 2019.
- 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.