Air spring actuator weight transfer apparatus
CA 2409283 A1 · Owner: Johnson, Susan Joyce · Inventors: Johnson, Andrew H.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
This invention relates to using the expansion force of an air spring coupled , between, a snowplow vehicle and the attached snowplow so that contact between ground, engaging components of the snowplow and the road can be controlled either, automatically or manually. The air spring is held in alignment as it expands longitudinally, by an apparatus using guides and struts. Longitudinal alignment is, important, as bending of the air spring causes loss of force. Attachment points of the, apparatus are drawn together as the air spring expands. The longitudinal expansion, force of the air spring can be transmitted directly to a chain or cable.
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 November 13, 2002. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended November 13, 2022.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by November 13, 2024.
- 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.