Vibration damper
CA 1235157 A · Owner: Culley, Donald M. · Inventors: Culley, Donald M.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Title: "A VIBRATION DAMPER", ABSTRACT, A vibration damper (10 60) has a body (12,61), with a cylinder (13 65) divided into two variable, volume chambers (24 25; 75, 76) by a piston (23, 72), with an externally extending piston rod (22 70), fluid, passages (27, 28; 77, 78) interconnect the chambers (24, 25; 75,76) and each passage has a one-way valve (33, 36; 81, 82) to provide unidirectional flow of the damping fluid through the passages. A control valve (39, 40; 83, 84) is provided for each passage to control the rate of oil flow through the passages and thereby the rate of damping of the piston (23,72) in each direction. Where the piston rod (22) is provided in only one of the chambers …
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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 April 12, 1988. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended April 12, 2005.
- 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.