Adjustable pressure dual piston impulse clutch
CA 2079217 C · Owner: Chicago Pneumatic Tool Company · Inventors: Schoeps, Knut Christian; Wallace, William K.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A hydraulic torque impulse generator (10) uses a dual piston arrangement to provide impacts to a rotative anvil (20) and automatic shut-off and control (42, 44 46, 48) for limiting the pressure , without reversing the direction of the driving clutch cage (22), a pressure venting arrangement (34) permitting one impact per revolution.
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 March 11, 1991 and granted August 1, 2000. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended March 11, 2011.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by March 11, 2013.
- 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.