US Patent 7278442 Vented port-cap for fire hydrant
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Patent abstract
The vented port-cap includes a check-valve, which admits air into the barrel of the hydrant when the pressure inside is lower than the pressure outside. After an inspection of the hydrant, the hydrant can be left to drain by itself, even though the port-cap has been replaced and tightened.
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US Patent 07278442 Vented port-cap for fire hydrant US Patent 7278442 Vented port-cap for fire hydrant
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Patent Number
0727844200
Patent Number
727844200
Edits on 21 May, 2023
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Official Website
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Infobox
Is a
Patent Jurisdiction
Patent Number
072784420
Date of Patent
October 9, 2007
0Patent Application Number
112147150
Date Filed
August 31, 2005
0Official Website
Patent Primary Examiner
Edits on 24 Sep, 2022
Golden AI
Infobox
Is a
Patent Jurisdiction
Patent Number
072784420
Date of Patent
October 9, 2007
0Patent Application Number
112147150
Date Filed
August 31, 2005
0Official Website
Patent Primary Examiner
Edits on 17 Jun, 2022
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US Patent 07278442 Vented port-cap for fire hydrant
Infobox
Is a
Patent jurisdiction
Patent number
07278442
Date of patent
October 9, 2007
Patent application number
11214715
Date Filed
August 31, 2005
Patent primary examiner
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