Railway track tamping machine
CA 1282282 C · Owner: Kershaw Manufacturing Co. Inc. · Inventors: Pasquini, Sandro
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The tamping machine is equipped with tool holders (7) on which each of the two tools (8) of a pair of tamping tools is connected by a cylinder-piston unit (28) via an, eccentric arm (25, 25'), to one of the two eccentrics (24 24') of the output shaft (33) of a forced oscillation generator. Each of the two eccentric arms (25 25') has, in addition to its articulation to one of the two eccentrics, a second articulation connected directly to a hydraulic cylinder-piston unit (28) and a third articulation (29) connected by a connecting link (30) to a pivot (31) fastened on the tool holder said last, connection having the purpose of immobilizing the two eccentric arms in rotation around the …
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
- Granted April 2, 1991. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended April 2, 2008.
- 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.