Mine boring machine
CA 2080217 C · Owner: Krueckl, Edward · Inventors: Krueckl, Edward
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A continuous mining machine has a cutter frame with two rotary boring heads mounted on this frame for rotation about axes extending longitudinally of the machine. Each boring head has a plurality of radially extending rotor arms which carry and support cutter bits on the front thereof. A pair of reciprocating pole devices are mounted in each of the rotor arms for movement in the radial direction of the arm. A number of link members are each pivotally connected at opposite ends thereof to respective pair of the pole devices and additional cutter bits are mounted on the link members. There is also a cam mechanism for reciprocating each pair of pole devices as the boring heads are rotated. The …
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 October 8, 1992 and granted December 23, 1997. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended October 8, 2012.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by October 8, 2014.
- 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.