Backflow preventing device
CA 1279550 C · Owner: Tenhengel, Edward L. · Inventors: Tenhengel, Edward L.
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 hose connection vacuum breaker backflow preventing device for installation on the discharge nozzle of a water faucet for preventing reverse water flow into the faucet which may possibly contaminate the water supply. The device includes a unitary tubular body defining an unobstructed passageway with threaded female inlet and male outlet connections at opposite ends thereof. An integral shoulder is formed interiorly of the passageway and a pair of exhaust ports open radially I outwardly through the body from the passageway upstream of the shoulder. A valve assembly within the passageway is spring-biased into a seated position closing communication between 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 29, 1991. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended January 29, 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.