Power steering system with controlled centering
CA 2344692 A1 · Owner: Howard, Durrell U. · Inventors: Howard, Durrell U.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A vehicle power steering system comprising a power unit (14) a valve unit , (16), and a centering unit (18). A piston (24) of the power unit (14) reciprocates in a cylinder (26) to provide power assisted steering and is engaged by a worm (36) connected to the steering shaft (22) for rotation in response to either the centering unit or the vehicle steering member. The valve unit (16) is connected between the worm (36) of the power unit (14) and a steering shaft (22) segment from the centering unit (18) and includes a , rotary valve member (42) rigidly fixed to the steering shaft segment (22) and rotatably received in the bore of a sleeve member (38) fixed to the worm (36). The sleeve …
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 June 14, 1999. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended June 14, 2019.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by June 14, 2021.
- 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.