Assignee
HYPRO CORP
US29 patents
Top patents by PatentIndex Score
US6766863B2Jul 27, 2004
Fire fighting foam injection system with auto-start feature
HYPRO CORP45 citations95
USRE35362EOct 29, 1996
Apparatus and method for controlling the introduction of chemical foamant into a water stream in fire-fighting equipment
HYPRO CORP46 citations95
US5494112AFeb 27, 1996
System for introduction of concentrated liquid chemical foamant into a water stream for fighting fires
HYPRO CORP85 citations95
US5313548AMay 17, 1994
Direct current motor speed controller
HYPRO CORP45 citations95
US5232052AAug 3, 1993
Apparatus and method for controlling the introduction of chemical foamant into a water stream in fire-fighting equipment
HYPRO CORP68 citations95
US5765644AJun 16, 1998
Dual tank control system and method for use in foam introduction fire fighting systems
HYPRO CORP52 citations92
US5764463AJun 9, 1998
Current limiting circuit and electronic fuse for use in foam injection fire fighting systems
HYPRO CORP44 citations92
US5449280ASep 12, 1995
Pump including integral reservoirs for permitting dry run of pump
HYPRO CORP32 citations92
US4830589AMay 16, 1989
Variable stroke positive displacement pump
HYPRO CORP54 citations92
US4732175AMar 22, 1988
Surge suppressor
HYPRO CORP27 citations92
US6886639B2May 3, 2005
High flow foam system for fire fighting applications
HYPRO CORP49 citations91
US6116855ASep 12, 2000
Flexible impeller removal system
HYPRO CORP23 citations91
US6085586AJul 11, 2000
Flow meter system with remote displays for each discharge
HYPRO CORP50 citations90
US5174383ADec 29, 1992
Apparatus and method for controlling the introduction of chemical foamant into water stream in fire-fighting equipment
HYPRO CORP98 citations90
US4824342AApr 25, 1989
Chemical injector system for piston pumps
HYPRO CORP45 citations90
US6712293B2Mar 30, 2004
Nozzle tip for agricultural sprayers
HYPRO CORP25 citations89
US6557787B2May 6, 2003
Nozzle for agricultural sprayers
HYPRO CORP24 citations89
US6394753B1May 28, 2002
Flexible impeller removal and installation method
HYPRO CORP29 citations84
US6095776AAug 1, 2000
Peristalic rubber impeller pump
HYPRO CORP19 citations83
US5934173AAug 10, 1999
Reciprocating plunger pump
HYPRO CORP18 citations80
US5402569AApr 4, 1995
Method of manufacturing a pump with a modular cam profile liner
HYPRO CORP17 citations73
US4721444AJan 26, 1988
Fluid pump incorporating pulsation dampener surrounding its shaft
HYPRO CORP9 citations73
US5074767ADec 24, 1991
Positive displacement pump with rotating reciprocating piston and improved lubrication feature
HYPRO CORP10 citations71
US6045334AApr 4, 2000
Valve disabler for use in high pressure pipe cleaning applications
HYPRO CORP13 citations66
US5911562AJun 15, 1999
High pressure fluid delivery system with automatic priming valve
HYPRO CORP15 citations66
US6203302B1Mar 20, 2001
Rubber impeller pump
HYPRO CORP3 citations61
US5022831AJun 11, 1991
Positive displacement pump with rotating reciprocating piston
HYPRO CORP6 citations60
US5775880AJul 7, 1998
Valve disabler for use in high pressure pipe cleaning systems
HYPRO CORP5 citations59
US6126171AOct 3, 2000
Sealing cartridge
HYPRO CORP6 citations56