Rotary valve plate for internal gear device
CA 1312781 C · Owner: Parker-Hannifin Corporation · Inventors: Dlugokecki, Andrew N.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
An improved rotary valve plate and internal gear machine wherein an imbalance across the rotary valve plate due to high pressure fluid on the commutator side of the valve plate being opposite low pressure fluid in the variable displacement chambers on the gear side of the valve plate is balanced by a recess which extends around the periphery of the valve plate and receives fluid from the gear side of the valve plate to urge the valve plate toward the commutator. Preferably the internal gear, machine is of a type with an orbiting outer rotor orbiting in an annulus with intermediate pressure fluid in the annulus. The recess on the gear side of the valve plate is disposed to receive …
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 January 19, 1993. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended January 19, 2010.
- 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.