A locking wedge assembly for a slackless drawbar assembly
CA 2238550 C · Owner: Daugherty, David W. Jr. · Inventors: Natschke, Scott; Daugherty, David W. Jr.; Ring, Michael E.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A locking wedge assembly for use in a slackless drawbar assembly designed to connect together, in a substantially semi-permanent fashion, adjacently disposed ends of a pair of railway cars. Such locking wedge assembly including a locking wedge member having a top surface and a bottom surface. A crushable support member has a top surface engageable with at least a portion of the bottom surface of such wedge member. An aperture is formed through the crushable support member and an anchoring means is engaged with the locking wedge member and extends through such aperture formed in the crushable support member for securing the locking wedge member in such slackless drawbar assembly. Such …
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 May 26, 1998 and granted November 12, 2002. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended May 26, 2018.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by May 26, 2020.
- 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.