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Class Information
Number: 116/112
Name: Signals and indicators > Alarms > Fluid flow
Description: Devices in which the flow of a current of fluid or the check of its flow in a pipe or between confining walls controls an alarm.










Patents under this class:
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Patent Number Title Of Patent Date Issued
8636899 Vented alarm apparatus for use with a pool skimmer basket Jan. 28, 2014
8034170 Air filter monitoring system Oct. 11, 2011
7730847 Personal, wearable, disposable breathing-gas flow indicator Jun. 8, 2010
7621978 Filter timer Nov. 24, 2009
7497185 Audible fill level alarms for liquid storage vessels Mar. 3, 2009
7364610 Air filter sensor Apr. 29, 2008
7159533 System and method for monitoring the delivery of gas to a person's airway Jan. 9, 2007
6837922 Air filter sensor apparatus kit and method Jan. 4, 2005
6796264 Fluid flow monitor and indicator Sep. 28, 2004
6526907 View around flow indicator Mar. 4, 2003
6299006 Whistling beverage bottle construction Oct. 9, 2001
5832968 Fuel overfill warning device Nov. 10, 1998
5798697 Exhaust/supply direction indicator Aug. 25, 1998
5661461 Exhaust/supply direction indicator Aug. 26, 1997
5410298 Fluid flow direction detector Apr. 25, 1995
5377395 Externally removable casket hardware Jan. 3, 1995
5325809 Hair dryer with alarm notifying user of clogged filter Jul. 5, 1994
5302055 Signalling device Apr. 12, 1994
5291182 Fluid flow direction detector Mar. 1, 1994
5229766 Marine fuel tank pollution control apparatus Jul. 20, 1993
5197407 Security device for attachment to the rails a movable door or window Mar. 30, 1993
5023608 Fuel filler alarm for boats Jun. 11, 1991
4997013 Liquid fill level indicator Mar. 5, 1991
4976297 Funnel having improved liquid fill level indicator Dec. 11, 1990
4950107 Audible alarm device for divers Aug. 21, 1990
4871081 Dual wall vessel for primary and secondary liquid containment Oct. 3, 1989
4805701 Fire extinguisher and alarm apparatus Feb. 21, 1989
4759309 Passive personal alarm device Jul. 26, 1988
4665386 Auxiliary knob for gas valve to annunciate open condition May. 12, 1987
4632052 Tornado early warning device Dec. 30, 1986
4523466 Acoustic monitoring of tube vibration Jun. 18, 1985
4463473 Vacuum cleaner Aug. 7, 1984
4445454 Temperature sensor May. 1, 1984
4389880 Rapidly erodible sonde Jun. 28, 1983
4375789 First out indicator Mar. 8, 1983
RE30539 Soil cultivating implements Mar. 10, 1981
4252076 Automatic signaling device Feb. 24, 1981
4236949 Process for preparing a hermetically sealed assembly Dec. 2, 1980
4227482 Pressurized fluid-actuated sound-producing device, and method of assembling it Oct. 14, 1980
4215646 Low pressure differential detecting whistle Aug. 5, 1980
4166428 Intruder alarm Sep. 4, 1979
4091762 Audible vibratory reed assembly May. 30, 1978
4044712 Pressurized fluid powered horn Aug. 30, 1977
4034813 Combined fire extinguisher and audible alarm Jul. 12, 1977
4034174 Wind warning device Jul. 5, 1977
4023507 Soil cultivating implements May. 17, 1977
4022148 Portable fire alarm May. 10, 1977
3993017 Particle flow monitor Nov. 23, 1976
3961597 Liquefied gas alarm device Jun. 8, 1976
3957012 Anti-burglary sound emitting device May. 18, 1976

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