Gear pump
CA 1284064 C · Owner: Sundstrand Corporation · Inventors: Aarestad, Jerome K.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Abstract, A gear pump which includes a pair of intermeshing gears. A housing defines a pumping chamber having peripheral walls surrounding and in sealing contact with the circumference of the gears between an inlet port and a discharge port. Bearing walls are adapted to engage adjacent side faces of the gears in substantially sealing relation. Grooves are provided in the bearing walls for progressively admitting pressure to the gear teeth as the gear teeth move toward the discharge port. The grooves are arcuately shaped and diverge toward the discharge port from a point intermediate the inlet and discharge ports and allow compressed air in the liquid to be gradually displaced by liquid …
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 May 14, 1991. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended May 14, 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.