Power steering system with a variable bias between valve elements
CA 2247260 A1 · Owner: Trw Inc. · Inventors: Doolittle, Marc H.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A power steering control valve (22) includes inner and outer valve members (40, 42) rotatable relative to each other. A force transmitting assembly (114) transmits a force which resists relative rotation between the valve members. A pressure chamber (138) is connected in fluid communication with a pump (24) and controls operation of the force transmitting assembly (114). The pump (24) supplies fluid at a relatively high flow rate during operation of the pump at a low speed and supplies fluid at a relatively low flow rate during operation of the pump at a relatively high speed. A secondary valve assembly (170) is in fluid communication with the pressure chamber (138) and defines an …
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
- Filed February 27, 1997. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended February 27, 2017.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by February 27, 2019.
- 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.