Locknut
CA 1109705 A · Owner: Lamson & Sessions Co. (The) · Inventors: Mortus, Harold J.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
An improved locknut has an axially extending central opening with standard thread convolutions which freely engage an externally threaded member and lock thread convolutions which interfere with the threads on the externally threaded member to provide a locking action. The lock thread convolutions have an axial extent which is less than half of the total axial extent of the internal threads on the nut. The lock thread convolutions are formed by making a plurality of indentations in the nut body. Each of these indentations is defined by a continuously curving surface which forms part of a cylindrical plane. Each indentation has continuously curving edges which intersect at a pair of peaks at …
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 September 29, 1981. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended September 29, 1998.
- 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.