Spring adjustment system for drill string tool
CA 1062240 A · Owner: Dresser Industries · Inventors: Young, James W.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Abstract of the Disclosure, A torque transmitting drill string tool is provided that includes an outer member and an inner member telescopically arranged. Spline means between said outer member and said inner member transmits torque. A spring means is positioned between the outer member and the inner member. Means are provided for adjusting the position and/or pre-load of the spring means without disassembling the tool. -1a-
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 11, 1979. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended September 11, 1996.
- 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.