Hydraulic spring compressor
CA 2256755 C · Owner: Mecanique Energetique · Inventors: Lambert, Patrick
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The invention discloses a hydraulic spring compressor comprising a body with at least two telescopic parts (1 4, 7), respectively (1, 7) equipped with coupling means (2 9) for a clamping jaw (3, 10) and comprising a control mechanism within the body for its lengthening or shortening. The innermost body part (7) is constituted by a single-acting screwjack cylinder of which the rod (11) integral with the jack piston (12), is fixed to the outermost part (1) of the body and is provided with a supply conduit (14) for the jack chamber (13) the volume increase of which leads to the contraction of the compressor body.
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 June 3, 1997 and granted August 14, 2001. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended June 3, 2017.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by June 3, 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.