Composition railway brake shoe
CA 1231647 A · Owner: Amsted Industries Incorporated · Inventors: Olsen, Alfred G.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A composition railway brake shoe comprising a body of friction material including a binder having rubber and a thermosetting phenolic resin in which fillers and fibers are dispersed a metal back plate for attaching the, shoe to a railway car and a backing strip interposed between the back plate and the body of friction material, the backing strip comprising a rubber binder having dispersed therein a high strength and temperature resistant aramid fiber ranging between about .3 to about 1.0 percent of the weight of the backing strip wherein the aramid has a tensile strength of 400,000psi and temperature resistance between about 420° - 500°F.
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 January 19, 1988. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended January 19, 2005.
- 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.