Mobile track tamping machine
CA 2011104 C · Owner: Theurer, Josef · Inventors: Theurer, Josef
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A mobile track tamping machine comprises a machine frame, undercarriages mounting the machine frame on a track and a plurality of independently transversely and vertically adjustable tamping tool units aligned transversely to the track, each tamping tool unit comprising a pair of reciprocable vibratory tamping tools including tamping picks immersible in the ballast, drives for reciprocating the tamping tools in a direction extending substantially perpendicularly to the ties and for vibrating the tamping tools, and a drive for vertically adjusting the tamping tool unit. Respective transversely pivotal carrier frames for two of these tamping tool units are mounted on the machine frame, each …
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, 1990 and granted March 23, 1999. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended February 26, 2010.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by February 26, 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.