Electrohydraulic machine
CA 2112357 C · Owner: Elektro-Mechanik Gmbh · Inventors: Sasse, Bernhard; Zimmermann, Peter
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
An electrohydraulic machine for generating a force on a vertically movable piston rod (5) linked to the piston (4) of a cylinder (3) has a first centrifugal pump (17,18) arranged in the part of the cylinder (3) opposite to the piston rod (5) and linked by a shaft (15) to an electric motor (2) as well as a, housing for the cylinder and centrifugal pump that delimits a reservoir for the working fluid. A second centrifugal pump (18,19) is arranged underneath the first centrifugal pump (17,18) and both centrifugal pumps (17,18) and both centrifugal pumps (17,19; 18,19) are in communication with the reservoir (14) through a duct (21,22). The cylinder chamber (6) is closed above the piston (4) in …
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 30, 1992 and granted August 1, 2000. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended October 30, 2012.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by October 30, 2014.
- 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.