Method and apparatus for tensioning a drum
CA 1077736 A · Owner: Neary, John R. · Inventors: Neary, John R.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A method of tensioning a musical drum is disclosed using a device for torquing the tension rods of the drum. The device has a housing having a central aperture and a concentric upper recess. The upper recess has a first partial annular groove and a concentric second annular groove. A shaft assembly is rotatably disposed in the central aperture and the upper recess and is adapted to receive at its lower end means for gripping a tension rod. The shaft assembly has a stop portion disposed in the first partial annular groove for positive rotation of the shaft assembly beyond a predetermined range of rotation of the housing. Biasing means disposed in the second annular groove is connected …
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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 May 20, 1980. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended May 20, 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.