Device for the precise transverse positioning for a member displaceable along a rail of a railway track with respect to said rail
CA 2000550 C · Owner: Speno International Sa · Inventors: Panetti, Romolo
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The invention relates to a method for positioning with precision a member displaced along a rail transversely with respect to the symetry axis of the head of said rail. According to this method, one emits through the head of the rail two ultrasound beams which are pratically perpendicular to the fishing plates of this rail. One receives the echoes of these beams reflected by the fishing plates. One forms a regulation or adjusting signal which is function of the time difference between the emission and the reception of its echoe for each said two ultrasound beams and uses this regulating signal to elaborate a control signal for the transverse positioning of the said member.
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 12, 1989 and granted December 7, 1993. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended October 12, 2009.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by October 12, 2011.
- 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.