Locking pins for movable subframe of tractor-trailers
CA 2262938 C · Owner: Hendrickson International Corporation · Inventors: Pierce, Phillippi Randsome; Dilling, Scott Allen; Ramsey, John Edward
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A movable subframe for tractor-trailers commonly referred to as a slider, includes a retractable pin mechanism having improved locking pins (149) for locking the movable subframe in a selected position relative to the tractortrailer body. The improved pin includes a tapered or truncated conical-shaped portion (151) which nests in a tapered enclosure (164) when the pins are in the fully extended or locked position. When one or more of the pins of the retractable pin mechanism become jammed in the locked position due to slight misalignment between the respective slider and trailer body openings through which each pin extends when in the locked position a generally uniformly , …
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 August 27, 1997 and granted September 17, 2002. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended August 27, 2017.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by August 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.