Fluid-powered precision oscillator
CA 2024249 C · Owner: Ahlander, Ulf · Inventors: Ericson, Jan; Ahlander, Ulf
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The present invention relates to a fluid-powered precision oscillator having a cylindrical housing (3) a, piston (9) displaceable in the housing and connected to a piston rod (8) extended through a front end wall (4) of the housing, and a control means (11, 16, 22 24) for, automatically reversing the direction of movement of the piston and piston rod. According to the invention the piston rod (8) is hollow, and a screw (11) is rotatably journalled in a rear end wall (5) of the housing (3) extends with a first end thereof into the hollow piston rod (8) and engaging a nut (16) being fixed to the piston rod (8), and the screw at its other end carries a toothed code disk (22) cooperating with a …
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 August 29, 1990 and granted April 24, 2001. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended August 29, 2010.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by August 29, 2012.
- 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.