Assignee
AMTROL INC
US45 patents
Top patents by PatentIndex Score
US5386925AFeb 7, 1995
Expansion tank
AMTROL INC71 citations95
US4284097AAug 18, 1981
In line back flow preventer
AMTROL INC126 citations94
US5295502AMar 22, 1994
Non-refillable valve
AMTROL INC25 citations92
US4836409AJun 6, 1989
Integral diaphragm-liner bladder for hydropneumatic tank
AMTROL INC38 citations92
US4471907ASep 18, 1984
Venturi pressurizer for incompressible-liquid circulating systems
AMTROL INC34 citations92
US4344645AAug 17, 1982
Tee-type leg bracket
AMTROL INC43 citations92
US4241843ADec 30, 1980
Lined metal tank with heat shield and method of making same
AMTROL INC36 citations92
US6386384B1May 14, 2002
Full jacket gas cylinder
AMTROL INC64 citations91
US5758820AJun 2, 1998
Heat recovery system
AMTROL INC45 citations91
US5036876AAug 6, 1991
Non-refillable cylinder valve for returnable cylinders
AMTROL INC35 citations91
US4921004AMay 1, 1990
Piercing surge regulator valve and apparatus
AMTROL INC32 citations91
US4555253ANov 26, 1985
Gas-liquid vortex separator-eliminator
AMTROL INC43 citations91
US4299248ANov 10, 1981
Diaphragm valve air vent device for water systems
AMTROL INC38 citations91
US4232704ANov 11, 1980
In line back flow preventer
AMTROL INC73 citations91
US5778679AJul 14, 1998
Method and apparatus for increasing acceptance and adjusting the rate of pressure variations within a prespecified range in precharged fluid storage systems
AMTROL INC43 citations90
US5657790AAug 19, 1997
Valves for pressurized containers
AMTROL INC47 citations90
US7287663B2Oct 30, 2007
Lined pressure vessel and connector therefor
AMTROL INC35 citations88
US5551590ASep 3, 1996
Non-metallic pressure vessel fitting
AMTROL INC71 citations88
US5111879AMay 12, 1992
Sanitary locking lip split well seal
AMTROL INC32 citations88
US5012833AMay 7, 1991
Freeze-proof hydrant
AMTROL INC22 citations88
US4971097ANov 20, 1990
Freeze-proof hydrant
AMTROL INC29 citations88
US4813575AMar 21, 1989
Non-refillable valve for pressurized containers
AMTROL INC31 citations88
US4573611AMar 4, 1986
Non-refillable valve
AMTROL INC41 citations88
US7100683B2Sep 5, 2006
In-well aeration device
AMTROL INC22 citations87
US7255245B2Aug 14, 2007
Hybrid pressure vessel with separable jacket
AMTROL INC34 citations86
US7216673B2May 15, 2007
Non-metallic expansion tank with internal diaphragm and clamping device for same
AMTROL INC25 citations86
US7032628B2Apr 25, 2006
Mobile prepressurized diaphragm type fluid storage tank
AMTROL INC22 citations86
US5794660AAug 18, 1998
Valves for pressurized containers
AMTROL INC28 citations86
US4313400AFeb 2, 1982
Lined metal tank with heat shield, indirect fired water heater and method of making same
AMTROL INC28 citations82
US4921214AMay 1, 1990
Non-refillable packless valve for pressurized containers
AMTROL INC22 citations81
US4475932AOct 9, 1984
Gas-liquid vortex separator-eliminator
AMTROL INC25 citations81
US4403385ASep 13, 1983
Process of preparing a double wall heat exchanger
AMTROL INC23 citations81
USD268315SMar 22, 1983
Plural leg support unit for a water tank or similar article
AMTROL INC20 citations81
USD460519SJul 16, 2002
Handle
AMTROL INC14 citations79
US7048861B2May 23, 2006
System and method for in-well aeration
AMTROL INC16 citations78
US4165951AAug 28, 1979
Water pressure booster system and control valve therefor
AMTROL INC24 citations77
USD559348SJan 8, 2008
Handle for a portable gas cylinder
AMTROL INC9 citations75
US4456456AJun 26, 1984
Hot-water heating system having an air eliminator
AMTROL INC16 citations74
US4420010ADec 13, 1983
In-line back flow preventer
AMTROL INC14 citations71
US4207915AJun 17, 1980
Back flow preventer
AMTROL INC17 citations71
US6957799B2Oct 25, 2005
Valve for a non-refillable pressurized container
AMTROL INC14 citations70
US4546819AOct 15, 1985
Double wall heat exchanger
AMTROL INC18 citations68
US5691406ANov 25, 1997
Universal EPDM/butyl compound for use as an elastomeric barrier in water storage and treatment systems and the like
AMTROL INC9 citations66
US4597559AJul 1, 1986
Diaphragm valve
AMTROL INC5 citations62
US4688694AAug 25, 1987
Safety means for pressurized gas containers
AMTROL INC2 citations60