Lift method and apparatus with floating lift cylinder attachment
CA 2287580 C · Owner: Grove U.S. L.L.C. · Inventors: Barthalow, Henry D.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A lift method and apparatus for moving an arm structure includes a first arm structure and a second arm structure pivotally connected to the first arm structure. The apparatus further includes a moving device and a displacing link for displacing the moving device relative to at least the first or second arm. The displacing link provides the moving device with a mechanical advantage whereby work required to move the second arm structure is substantially reduced while lifting capacity of the second arm structure and the moving device is substantially increased and the range of motion of the second arm structure relative to the first arm structure is also increased.
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 October 25, 1999 and granted December 30, 2003. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended October 25, 2019.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by October 25, 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.