Tamping machine with a two-sleeper tamping unit
CA 2090396 A1 · Owner: Franz Plasser Bahnbaumaschinen-Industriegesellschaft M.B.H. · Inventors: Theurer, Josef
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A tamping machine for tamping a track (18) is provided with a machine frame supported on on-track undercarriages and a two-sleeper tamping unit (1) with tamping tools (6 7, 8, 9), which are arranged in series in the longitudinal direction of the machine and are vibratable and squeezable by means of vibration and squeeze drives (5, 4), with tamping tines (16) for simultaneously tamping two adjacent sleepers (17). The tamping tools (6, 7, 8, 9) are mounted on a tool carrier (11) which is connected to an auxiliary frame (14) for vertical adjustment. A total of four auxiliary frames (14) are provided, transversely displaceable independently of one another by means of individual transverse …
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 25, 1993. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended February 25, 2013.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by February 25, 2015.
- 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.