Rotor drive coupling for progressing cavity pump
CA 1091051 A · Owner: Allen, Clifford H. · Inventors: Allen, Clifford H.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A stress relief device for a flexible shaft used to connect a rotary drive to a rotary load wherein the shaft, flexes in response to loads that produce bending stresses during shaft rotation. The shaft has a radial flange or hub, on at, least one end for connecting the respective end to another radial flange on either the rotary drive or the rotary load. In order to relieve the joint between the shaft and the hub from the stress concentration that occurs due to flexure of the shaft while being supported as a cantilever beam an annular, stress relief member is mounted on the shaft inwardly of and tightly secured to the radial flange, or hub. The specially designed stress relief member is …
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 December 9, 1980. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended December 9, 1997.
- 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.