Dual diaphragm pump
CA 1234720 A · Owner: Bazan, Alberto · Inventors: Murphy, Donald M.; Bazan, Alberto
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A pneumatically operated reciprocating three-way valve having particular application to a double diaphragm pump. The valve is operative without a lubricating oil mist or the inefficiency resulting from air leakage between the valve piston and cylinder. Sticking and stalling of the valve piston are prevented by deformation of the cylinder under pressure to provide leakage of selected cavities within the valve. The pump also avoids the use of a deicer mist by an adjustable bleed of high pressure air to provide a two step exhaust.
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 April 5, 1988. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended April 5, 2005.
- 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.