Parenteral solution diaphragm pump
CA 1293153 C · Owner: Danby, Hal C. · Inventors: Danby, Hal C.; Ritson, Carl
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A diaphragm pump cassette for use with a pumping mechanism. The cassette comprises a pumping chamber and a check valve assembly communicating with the pumping chamber. The check valve assembly includes a first check valve and a second check valve. Each check valve includes a valve seat, flexible valve diaphragm and a movable valve seating mechanism for locating the diaphragm on the valve seat. The valve diaphragms are unseated with respect to the valve seat prior to mounting the pump cassette on the pumping mechanism whereby fluid may flow freely through the check valve. The valve seating mechanism of the first check valve includes a further mechanism, independent of the pumping mechanism …
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 December 17, 1991. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended December 17, 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.