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Expired Canadian patentCanada

Load-responsive pressure proportioning reducing valve assembly for vehicle hydraulic brake system

CA 1086358 A · Owner: Sumitomo Electric Industries, Ltd. · Inventors: Doi, Kaname

CIPO record

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Its claims, description and drawings are in the Canadian Patents Database.

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Abstract From the Canadian patent

A load-responsive pressure reducing valve assembly for hydraulic brake systems to be interposed between a brake master cylinder and the rear wheel brake cylinders of a wheeled vehicle. The valve assembly includes a fluid pressure proportioning valve which restricts the flow of fluid from the master cylinder to the brake slave cylinders during a predetermined range of increasing fluid pressure supplied therefrom to the brake slave cylinders. The valve assembly also includes a deceleration sensing valve having a spherical inertiaresponsive member that is responsive to a predetermined rate of vehicle deceleration to travel a predetermined distance up an incline to close off the supply of …

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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 September 23, 1980. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended September 23, 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.
FiledJune 9, 1977
GrantedSeptember 23, 1980
Term endedSeptember 23, 1997
Patent numberCA 1086358 A
Classification (IPC)B60T8/26

Timeline

Timeline From CIPO dates

1978198019821984198619881990199219941996Application filedJune 9, 1977Patent grantedSep 23, 1980Term endedSep 23, 1997

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Everything on this page comes from the CIPO record linked above. Contains information licensed under the Open Government Licence – Canada.