Displacement pump
CA 1278724 C · Owner: Willimczik, Wolfhart · Inventors: Willimczik, Wolfhart
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A fluid displacement pump or motor comprising a housing closed by a cover and; a rotor having one or more displacement surfaces within the housing. A seal engages the rotor with a form fit and is rotatable therewith. A recess form a working chamber with which the displacement surfaces engage such working chamber being concentric with the axis of rotation of the rotor and formed in an end face of the housing that is proximate to the rotor; the housing end face subtending an angle that varies about 90° with respect to the axis of rotation of the rotor so that the cross-sectional area of the recess varies between a maximum and a minimum value and the seal which seals the, recess, is rotatable …
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 8, 1991. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended January 8, 2008.
- 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.