Sonic drill head
CA 2641982 C · Owner: Lange, James E. · Inventors: Smith, Brian; Lange, James E.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A sonic drilling head (10) includes a spindle (30) which is both rotated and vibrated at sonic frequency to effect ground penetration of members such as drill rods etc. Two pairs of rotating eccentric masses (70 72, 74, 76) are mounted in a housing (84). The pairs of masses have intersecting axis. A spiral bevel gear (94) and drive shaft (120) rotate the first pair of masses which engage the second pair of masses so that the pairs of masses are driven in opposite directions. Rotation is imparted to the spindle through a geared bearing (48) isolated by a pack of precision disc springs (62) which also ooperate with a second set of precision disc springs (50) to isolate the vibrations of 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 February 26, 2002 and granted September 25, 2012. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended February 26, 2022.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by February 26, 2024.
- 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.