Apparatus and method for a modular lifting and shoring system
CA 2229850 C · Owner: Vanderklaauw Marital Trust · Inventors: Vanderklaauw, Peter M.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The present invention provides a plurality of block-like building elements which may be bolted to each other to form a variety of support structures without the use of heavy hoisting equipment. Some of the building elements have a generally U-shaped appearance when viewed in plan i.e. the building elements are open or slotted on one side so that a hydraulic cylinder or other lifting device may be inserted into the interior of the building element or into a post formed from a stack of connected building elements. The lifting device may be used to preload the support structure. Advantageously the lifting device may be used to progressively lift a load to a higher elevation by elevating the …
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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 February 18, 1998 and granted May 7, 2002. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended February 18, 2018.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by February 18, 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.