Vibration dampening device for sporting rackets
CA 1250329 A · Owner: Krent, Edward D. · Inventors: Paffett, Nicholas B.; Krent, Edward D.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A vibration dampening device (10 70, 76, 80, 86, 90) for use with hand held sporting rackets (15), particularly tennis rackets, having a face or striking surface (15) formed of two intersecting sets of parallel strings (16, 18). The device of this invention comprises a block of viscoelastic foam which is compressed and inserted between the strings on the striking surface. This block of foam is preferably in the shape of a cylinder and when it is inserted between two, adjacent parallel strings it assumes a generally spherical shape. Typically this compressed block engages four adjacent strings of both sets of strings, or three strings and the racket frame. This block may be placed at various …
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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 February 21, 1989. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended February 21, 2006.
- 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.