Hydraulically operated edge-of-dock leveler
CA 2085755 C · Owner: Hageman, Martin P. · Inventors: Hageman, Martin P.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A hydraulically operated edge-of-dock dock leveler including a deck plate having its rear edge hinged to the dock and an extension lip is hinged to the front edge of the deck plate. In the storage position the deck plate is located in a generally horizontal position and the lip hangs downwardly in a generally vertical pendant position. A hydraulic cylinder unit interconnects the frame of the dock leveler with the deck plate and extension of the cylinder unit acts to move the deck plate to a generally vertical position where a latch that is pivotally connected to the underside of the lip engages an abutment on the frame to lock the deck plate in the vertical position. Retraction of the …
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 18, 1992 and granted February 22, 2000. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended December 18, 2012.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by December 18, 2014.
- 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.