Air spring force apparatus adapted for weight transfer
CA 2364224 A1 · Owner: Johnson, Andrew H. · Inventors: Johnson, Andrew H.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
An air spring actuator (35) is mounted vertically behind the push-frame (26) , of a, snowplough vehicle. A boom structure (18) is mounted on the front side of the push-, frame. A cable (10) supported by boom (18) connects the actuator to the plough. Vehicle air pressure is supplied to the air spring through an adjustable self- relieving, pressure regulator. The air spring actuator force apparatus has sufficient stroke to, allow the snowplough to follow an uneven surface. Longitudinal expansion of the, actuator causes weight to be transferred from the plough to the vehicle , pushing it. Because a portion of the weight of the snowplough has been transferred to the vehicle, pushing it, …
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 December 4, 2001. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended December 4, 2021.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by December 4, 2023.
- 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.