Control for a variable displacement pump or motor
CA 1088373 A · Owner: Eaton Corporation · Inventors: Cornell, Charles R.; Knapp, Kenneth K.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Kenneth K. Knapp and, Charles R. Cornell FOR: A CONTROL FOR A VARIABLE, DISPLACEMENT PUMP OR MOTOR A B S T R A C T, A control including a control valve and an override valve for use with a variable displacement pump or motor unit having a pair of strokers into and out of which fluid must be directed to vary the displacement of the unit. The control valve ports fluid from a high pressure source to a first control passage and from a second control passage to a low pressure source reverses said flow, and terminates said flow. The override valve is interposed between the control passages and the strokers and defines a pair of override passages therein used to direct fluid from one control …
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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
- Granted October 28, 1980. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended October 28, 1997.
- 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.