Directional boring head
CA 2310338 A1 · Owner: The Charles Machine Works, Inc. · Inventors: Gunsaulis, Floyd R.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A directional boring head assembly having a directional boring head with a, deflection surface capable of steering the directional boring head combined , with a replaceable, cutting member is provided. The position of the cutting member relative to the deflection surface, permits the directional boring head to steer the boring machine along the desired path while, providing enhanced cutting action adaptable to different soil types. As the boring machine is, advanced with rotation the leading edge of the cutting member contacts only a small portion of, the perimeter of the borehole thereby increasing the contact stress between the cutting member, and the face of the borehole for more …
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
- Filed May 31, 2000. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended May 31, 2020.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by May 31, 2022.
- 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.