Control means for a hydraulic servomotor
CA 1338271 C · Owner: Nissen, Harry Stentoft · Inventors: Thomsen, Flemming; Ravn, Kjeld; Nissen, Harry Stentoft
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Control means for a hydraulic servomotor comprise a series circuit of two magnetic valves (10, 13; 11, 12) in series. The one magnetic valve (12, 13) is normally open and is operated to the closed condition by control pulses (C12, C13) of a first train of pulses. The other magnetic valve (10, 11) is normally closed and is operated to the open condition by the control pulses (C10 C11) of a second pulse, train. In this way one obtains good resolution and certainty of operation.
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
- Granted April 23, 1996. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended April 23, 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.