Hydraulic support device
CA 2079237 A1 · Owner: Wolf, Robert · Inventors: Schiel, Christian; Wolf, Robert
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A hydraulic supporting device for supporting a first beam (52) on a second beam (53) has a pressure cushion (54) between the two beams. The pressure in the pressure cushion is variable but uniform over the whole length of the pressure cushion. The pressure cushion (54) rests on a contact surface on the first beam (52). The cross-sectional width (b) of the contact surface is less than the total width of the pressure cushion (54). A free space (55) into which a flexible tube of the pressure cushion (54) can penetrate is provided on each side of the contact surface.
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 March 22, 1991. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended March 22, 2011.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by March 22, 2013.
- 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.