Patent Yard Sign in
Expired Canadian patentCanada

Vertical shaft impact crusher rings

CA 1232887 A · Owner: Rexnord Inc. · Inventors: Tess, Kenneth C.; Szalanski, Scott E.

CIPO record

Overview

Drawings and full text

Its claims, description and drawings are in the Canadian Patents Database.

Open the CIPO record

Abstract From the Canadian patent

A vertical shaft impact crusher is provided having a cylindrical, tank in which the rotor is mounted for rotation about a vertical axis and for receiving rock fed axially from above and having impeller shoes for accelerating and throwing the rock outward against an annular breaker ring; wherein the breaker ring is a circular hoop mounted to the interior of the tank and has a plurality of spaced mounting means designed to securely yet releasably hold a plurality of specially designed anvil members each having a head comprised of a flat impact surface and an octagonal shaped periphery; a foot portion and a narrowed neck portion connecting said head and foot portions and engaging the mounting …

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 February 16, 1988. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended February 16, 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.
FiledJune 26, 1985
GrantedFebruary 16, 1988
Term endedFebruary 16, 2005
Patent numberCA 1232887 A
Classification (IPC)B02C13/18

Timeline

Timeline From CIPO dates

1986198819901992199419961998200020022004Application filedJune 26, 1985Patent grantedFeb 16, 1988Term endedFeb 16, 2005

Sources & verification

Everything on this page comes from the CIPO record linked above. Contains information licensed under the Open Government Licence – Canada.