Apparatus for increasing hand drill pressure
CA 2173424 C · Owner: Hamilton, Robert Lloyd · Inventors: Hamilton, Robert Lloyd
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
An apparatus for increasing hand drill pressure includes a lever having a first end and a second end. A sleeve is affixed transversely to the lever spaced from the first end. An anchor line is provided having a first end and a second end. The first end of the anchor line is secured to the first end of the lever. A hook is provided on the second end of the anchor line. The sleeve slides over a handle of a hand drill. The hook is used to anchor the anchor line to a workpiece. The lever provides a mechanical advantage to increase the pressure with which the hand drill engages the workpiece.
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 April 3, 1996 and granted May 16, 2000. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended April 3, 2016.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by April 3, 2018.
- 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.