Differential pressure switch assembly with high static pressure use characteristics
CA 1312895 C · Owner: Clark, Stephen S. · Inventors: Donnelly, John M.; Clark, Stephen S.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Abstract of the Disclosure A differential pressure switch assembly that includes a conventional snap action switch for controlling the off-on modes of operation of state of the art equipment which assembly, comprises a high pressure plate that defines the high pressure cavity and a high pressure port of restricted size therefor a low pressure plate that defines a first subchamber of the assembly low pressure cavity and a low pressure port therefor a diaphragm clamped between the high and low pressure plates and separating the switch assembly high and low pressure cavities, a piston mounted in the low pressure plate for movement perpendicularly of the assembly diaphragm and biased toward the …
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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
- Granted January 19, 1993. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended January 19, 2010.
- 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.