Telescopic hydraulic hoist apparatus
CA 2299460 C · Owner: Dawson Hydraulics, Inc. · Inventors: Dawson, Steven Clare
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The primary object of the invention is to provide a telescoping hydraulic hoist (10) which is significantly lighter than hoists of similar types. The telescopic hydraulic hoist (10) is made of drawn-over-manual (DOM) aluminum tubing consisting of a specially formulated alloy. The hoist is fast-acting has a greater bearing life, and air breathers (94 96, 98, 100, 102) for the , spaces between hydraulic stages to prevent dirt from being sucked into the hydraulic mechanism.
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 July 27, 1998 and granted July 22, 2003. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended July 27, 2018.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by July 27, 2020.
- 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.