Apparatus and method for calibrating float valve
CA 2268112 C · Owner: Bergsma, Rudolph · Inventors: Benjey, Robert P.; Waldorf, Lindsey E.; Bergsma, Rudolph
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
An improved apparatus and method for calibrating a float-type vent valve (20) for use in an automobile fuel tank (10). The valve (20) is provided with a calibration plate (24a) in the lower end thereof below the float (22a), the calibration plate (24a) defining an axially-adjustable support for the spring (22b) which balances the float. The calibration plate (24a) includes a force probe aperture (24d) through which a force measuring device of known type can be inserted to measure the downward force of the spring-balanced float (22a) at a specified distance from closure preferably a near-closed, position. The calibration plate (24a) then is adjusted up or down as needed until a position is …
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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 October 8, 1997 and granted June 18, 2002. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended October 8, 2017.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by October 8, 2019.
- 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.