Long travel high capacity friction draft gear assembly
CA 2562023 C · Owner: Sommerfeld, Howard R. · Inventors: Ring, Michael E.; Sommerfeld, Howard R.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A friction clutch type draft gear assembly (10) includes a housing (18) having an open front end (22) and a closed rear end forming a ledge (21) for enabling a longer buff and draft travel while fitting into a 24.625 inch draft gear pocket. A friction clutch mechanism (20) includes a pair of outer stationary plate members (12), a pair of movable plate members (38) a pair of inner , stationary plate members (44) having an inner surface (48) which is tapered at an angle of approximately 4.5~, a pair of wedge shoe members (54) having an upper surface (58) which is tapered relative to a longitudinal axis of the friction clutch mechanism (20), and a center wedge member (66) which includes …
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 April 5, 2005 and granted June 4, 2013. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended April 5, 2025.
- Certificates of supplementary protection extend only drug patents, and it isn't classified as one.
- 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.