Rotary vane oil pump and method of operating
CA 1324291 C · Owner: Waser, Max P. · Inventors: Zinsmeyer, Thomas M.; Waser, Max P.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Abstract of the Disclosure, A rotary vane pump has restricted fluid communication between the inlet and the trapped volume for about 4° of rotation beyond when the vane starts past the inlet. Similarly there is restricted communication between the trapped volume and the outlet for about 4° of rotation prior to the vane reaching the outlet. Additionally, in the preferred embodiment the trapped volume is in restricted communication with the outlet prior to its isolation from the inlet.
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 November 16, 1993. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended November 16, 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.