Motorless carbonator pump with gas saving device
CA 2029889 A1 · Owner: Ziesel, Lawrence B. · Inventors: Hughes, Robert D.; Ziesel, Lawrence B.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A motorless carbonator including a single acting pneumatic water pump (10) connected between a carbonator tank (30) and an uncarbonated water supply (28) with the pump having a gas return spring (90) integral therewith. The pump is driven by the carbon dioxide (CO2) fed to the carbonator tank. A CO2 saving device (54) is coupled between the water pump and the carbonator tank and includes a spring biased diaphragm (58) connected to a piston rod (68) and an O-ring support member (66) which operates to control the venting of CO2 to the atmosphere so as to reduce the amount of CO2 required to operate the pump during both a pumping stroke and a return stroke.
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
- Filed March 26, 1990. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended March 26, 2010.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by March 26, 2012.
- 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.