Shaft telescoping and rotational adjustment mechanism for a lawn and garden tool
CA 2521970 A1 · Owner: Trees, Gregory A. · Inventors: Yates, Jan B.; Trees, Gregory A.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A lawn and garden tool, such as a string trimmer includes a lower, housing, an upper housing having one or more axial channels interconnected with one or more circumferential channels disposed on an interior surface thereof and a shaft connected between the upper housing and the lower housing. A boss is located on an exterior surface of the shaft and is disposed within the channels such that the boss is capable of traveling back and forth between the interconnected axial and circumferential channels. Movement of the boss within one of the axial channels telescopes the shaft while movement of the boss within one of the circumferential channels rotates the shaft and thereby, rotates the …
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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 January 21, 1998. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended January 21, 2018.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by January 21, 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.