Split wedge draft gear with center friction plate
CA 1316149 C · Owner: Miner Enterprises, Inc. · Inventors: Carlstedt, Richard A.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The draft gear includes a single center friction plate and a pair of spaced apart friction wedges. Six major friction surfaces are defined four, of which are engaged upon contact with the follower the, other two being engaged after about one-half inch of travel. Three major groups of angles are defined a, first being between the friction wedges and the shoes a second between the friction wedges and the release wedge and a third between the shoes and the spring seat. These groups of angles cooperate to insure that the draft gear will release upon removal of external force.
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 13, 1993. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended April 13, 2010.
- 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.