US Patent No: 7,814,983

Number of patents in Portfolio can not be more than 2000

Dry pipe valve for fire protection sprinkler system

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ALSO PUBLISHED AS: 20080128026
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Importance

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Abstract

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A fire protection system comprises a supply pipe having a first fluid pressurized to a first pressure and a network of pipes having a plurality of sprinklers. The network of pipes have a second fluid being pressurized to a second pressure at approximately 5.5 times the first pressure. The system further comprises a dry pipe valve including a body defining a passage extending along a longitudinal axis between an inlet coupled to the supply pipe and an outlet coupled to the network of pipes. The inlet has an inlet diameter of approximately WD inches and a seat disposed in the body has a seating surface with a diameter AD approximately less than two times WD inches. The dry pipe valve further includes a clapper pivotable about an axis orthogonal to the longitudinal axis between a first position occluding the passage when the ratio of the second pressure to the first pressure is at least 5.5 and a second position permitting fluid flow through the passage when the ratio is less than 5.5.

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Patent Owner(s)

Patent OwnerAddressTotal Patents
GRINNELL LLCCRANSTON, RI22

International Classification(s)

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Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Ringer, Yoram Providence, RI 26 39

Cited Art Landscape

Patent Info (Count) # Cites Year
 
CENTRAL SPRINKLER CORPORATION (1)
4,854,342 Clapper seal for dry pipe valve 16 1988
 
Corrotex Limited (1)
4,706,706 Check valve and a seal for a check valve 28 1986
 
GRINNELL LLC (1)
7,104,333 Dry pipe valve for fire protection sprinkler system 3 2003
 
SAMSUNG ELECTRONICS CO., LTD. (1)
6,840,457 Wet-pipe sprinkler system, method of supplying water and dealing with water leak in the sprinkler system 5 2002
 
THE VIKING CORPORATION (1)
6,848,513 Fire protection valve trim assembly system 14 2003
 
VICTAULIC COMPANY (1)
6,666,277 Low pressure pneumatic and gate actuator 8 2001
 
Other [Check patent profile for assignment information] (2)
4,321,942 Backflow preventer valve 5 1980
4,552,221 Dry-head or deluge-type valve for fire-extinguishing systems 9 1983

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Maintenance Fees

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3.5 Year Payment $1600.00 $800.00 $400.00 Apr 19, 2014
7.5 Year Payment $3600.00 $1800.00 $900.00 Apr 19, 2018
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