Dual head anchor adjuster
CA 2047648 C · Owner: Almaraz, Roberto · Inventors: Almaraz, Roberto; Rhodes, Ronald L.; Gustin, David R.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A rail adjuster has a frame which mounts a head assembly for powered vertical movement between a raised travel position and a lowered operative position with the, head assembly having adjuster arms which can be positioned immediately adjacent a pair of rail-mounted anchors. The adjuster arms are moved together to shift the rail-mounted anchors along the rail toward the tie to achieve the anchor adjusting. The adjuster arms are constructed in a pivoting linkage having a horizontally acting hydraulic cylinder to provided a substantially horizontal force to the adjuster arms for providing an enhanced mechanical advantage in adjusting the anchors.
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 July 24, 1991 and granted October 19, 1999. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended July 24, 2011.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by July 24, 2013.
- 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.