Stump cutting and precision digging apparatus
CA 1056275 A · Owner: Shivers, Paul N. · Inventors: Shivers, Norman E. (Jr.); Shivers, Paul N.; Shivers, David E.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
This invention relates to a stump cutting and earth digging device. Prior art devices of this type have generally been very expensive, bulky and awkward to operate. Further, these devices have generally been limited to a single function of stump cutting. Realizing the shortcomings of known stump cutters the, instant invention provides a stump cutting/earth digging apparatus including a balanced channel frame, chassis medially supported by a pair of wheels which are independently mounted on vertically adjustable and horizontally telescopic axles. A combination belt and gear system provides drive means for a forward centrally disposed cutting wheel having a plurality of radially extending …
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
- Granted June 12, 1979. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended June 12, 1996.
- 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.