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Felix Hoffmann, a German chemist, was searching for something to relieve his father's arthritis. In doing so, he "rediscovered" acetylsalicylic acid and in 1900, patented a stable process for developing it. Hence, we have aspirin.
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| Number | Title | Issue Date |
| 7954506 | Automatic freeze protection system for domestic plumbing systems A plumbing system operable to automatically introduce antifreeze into the hot and cold water systems responsive to a signal from a controller. The controller activates the system automatically at a predetermined ambient temperature. The system can also be reconfigur... | 06/07/2011 |
| 7444209 | Miniature cooling device A method for regulating temperature in an enclosure is disclosed. The method involves monitoring a component temperature inside the enclosure. When the component temperature reaches a threshold, the method injects a coolant into the enclosure. The method further inv... | 10/28/2008 |
| 7353881 | Ganged fire extinguisher system A non-electrically actuated ganged fire extinguisher system for use in an enclosure of a size larger than the capacity of a single pre-engineered fire extinguisher comprises at least two pre-engineered fire extinguishers positioned at spaced locations in the enclosu... | 04/08/2008 |
| 7337800 | Automatic flushing system and method for a potable water station An automatic flushing system for a potable water station includes a conduit having a first end connected to a potable water supply source and a second end having a nozzle coupling. It also includes an air gap assembly having a coupling operable for coupling with the... | 03/04/2008 |
| 7300575 | Portable filter system A filter system for receiving an aqueous-based fluid contaminated with particles and emulsified contaminant oil, removing the particles, and separating the emulsified contaminant oil from the aqueous-based fluid includes a filter media for receiving the aqueous-base... | 11/27/2007 |
| 7273064 | Temperature-sensitive safety valve assembly The present invention relates to a temperature-sensitive safely valve assembly (10). The assembly (10) comprising a first region (16) for a first pressurised fluid, a second region (20) for a second pressurised fluid, a valve (26, 28, ... | 09/25/2007 |
| 7258129 | Moisture sensor and control system for sprinklers and method therefor A landscaping watering system has a probe for monitoring a moisture content of an area. A control unit is coupled to the probe for sending an activation signal to activate a flow of water when a signal from the probe indicates the moisture content of the area is bel... | 08/21/2007 |
| 7185711 | Fire protection system A fire suppression system includes system piping and at least one sprinkler with the system piping for delivering fire suppressant to the sprinkler. The sprinkler has an outlet and a temperature sensitive trigger with temperature sensitive trigger opening the outlet... | 03/06/2007 |
| 7156084 | Paint-ball sport gun with adjustable detent assembly A detent body with a center bore is secured to the chamber wall of a paint-ball gun. A floating detent with a hollow core and a domed tip reciprocates within the center bore, allowing the tip to extend into the chamber to restrict movement of a paint ball. Axially a... | 01/02/2007 |
| 7089962 | Compensation device for compensating volumetric expansion of media, especially of a urea-water solution during freezing A compensation device for compensating a volumetric expansion of a medium during freezing has a receptacle provided in a structural component. The medium is contained in the receptacle. A sealing element is provided that delimits the receptacle. The sealing element ... | 08/15/2006 |
| 7088227 | Alarm for a hydraulic system, hydraulic system, method of giving an alarm and vehicle incorporating a hydraulic system An alarm for a hydraulic system, a hydraulic system incorporating an alarm, a vehicle having a hydraulic system which incorporates an alarm, and a method of giving an alarm in a hydraulic system, where the hydraulic system comprises hydraulic fluid which is put in c... | 08/08/2006 |
| 7063271 | Moisture responsive sprinkler circuit A sprinkler circuit responds to the presence of water and limits watering accordingly. The sprinkler circuit comprises a control circuit and a moisture responsive circuit. The control circuit may be wired in series to a sprinkler cable at any point between a sprinkl... | 06/20/2006 |
| 7047949 | Venting device In a venting device for a fuel tank (1), a venting line (5) has a movable section (6) and a spring element (14). The free end of the venting line (5) is prestressed against an upper wall of the fuel tank (1). This ensures th... | 05/23/2006 |
| 7032833 | Fuel injection valve In a fuel injector, in particular a fuel injector for fuel-injection systems of internal combustion engines, a piezoelectric or magnetostrictive actuator is surrounded by a compensation sleeve. The compensation sleeve is made of a material exhibiting virtually no, o... | 04/25/2006 |
| 7017599 | Thermal relief vent and method of manufacturing the same An improved thermal relief vent for a fuel tank, and a method of manufacturing the same, includes a thermal relief ring that is used to create a mechanical seal within the vent. The thermal relief ring, at room temperature, is crimped in place by use of the vent cap... | 03/28/2006 |
| 7000850 | Anti-scald water valve assembly An anti-scald water valve assembly comprises a body including a passage for water, a valve provided in the passage for shutting off the passage, and an electro-mechanical actuator to cause closing of the valve. A temperature sensor senses the temperature of water ru... | 02/21/2006 |
| 6955226 | Ganged fire extinguisher system A non-electrically actuated ganged fire extinguisher system for use in an enclosure of a size larger than the capacity of a single pre-engineered fire extinguisher comprises at least two pre-engineered fire extinguishers positioned at spaced locations in the enclosu... | 10/18/2005 |
| 6895987 | Device that modifies irrigation schedules of existing irrigation controllers The present invention provides an irrigation control system in which a device (irrigation scheduler) automatically modifies irrigation schedules of installed irrigation controllers to affect irrigating of the landscape based on the water requirements of the landscap... | 05/24/2005 |
| 6837271 | Liquid flow control valve A liquid flow control valve has a valve body 10 in which is mounted a valve member 41 moveable between valve open and closed positions. A turbine 15 senses liquid flow through the valve body 10 and generates electrical pulses which are co... | 01/04/2005 |
| 6763845 | Water freeze prevention device An automatic water freeze prevention device having a first valve, second valve and third valve that cooperate to fill or drain a water utilization device according to pre-selected temperature conditions. These three valves are driven to their respective open/closed ... | 07/20/2004 |
| 6644337 | Damper assembly having improved strength characteristics A damper assembly is provided having a fusible link assembly including an outer housing member and an inner channel member having side walls that are fused to the outer housing. A pair of damper arms are pivotally connected to a mounting bracket at a pivo... | 11/11/2003 |
| 6484742 | Cartridge assembly for valve A cartridge assembly for a valve is disclosed. The cartridge assembly includes a cartridge containing an activation component. The cartridge and activation component are configured to be replaceable as a unit. The activation component prevents the valve f... | 11/26/2002 |
| 6345641 | Fluid-activatable device for shut-off under excess flow conditions A fluid-activatable shut-off device, configured as a shut-off valve, has a valve housing formed with a flow passage therethrough and a movably supported valve body, which is movable between an open valve position and a closed valve position. In the open v... | 02/12/2002 |
| 6341616 | Fire protection fluid relief valve A fluid pressure and heat sensitive valve connected with a flow line includes a collapsible pin, normally maintaining the valve closed, which collapses to open the valve in response to fluid pressure above a predetermined limit and includes a fusible plug... | 01/29/2002 |
| 6321768 | Fluid flow shutdown and pressure relief valve with a fusable element A fluid pressure and heat sensitive flow control valve interposed in a flow line includes a collapsible pin, normally maintaining the valve open, which collapses to close the valve in response to fluid pressure above a predetermined limit and includes a f... | 11/27/2001 |
| 6125873 | Temperature sensing flow control device A device for preventing water line freeze damage. The device incorporates air temperature sensing means to control a trickle flow in a water system, so that a trickle flow is initiated whenever the ambient air temperature drops below a predetermined point... | 10/03/2000 |
| 6123093 | System for controlling fluid flow A system for regulating flow of fluid through a flow line, such as a supply line, the line having a flow controller such as a valve, the system having a sensor for generating a signal in response to a parameter, a transmitter for transmitting a correspond... | 09/26/2000 |
| 6029686 | Thermally responsive valve A freeze protection plug has latching balls engageable bayonet-fashion with grooves in a fitting. The balls are normally held in engagement with the grooves by a cam, but move inward to release the plug from the fitting when the cam is moved by a thermal ... | 02/29/2000 |
| 5934302 | Control valve apparatus and method for regulating fluid flow in fluid-intake machines A control valve system. The system includes a microcontroller electronically connectable to the power supply of an electrical household appliance, such as a washing machine which is connected to the water piping system in a building via hoses. The microco... | 08/10/1999 |
| 5771947 | Computer readable medium having a computer program for dispensing compressed natural gas A method and apparatus for dispensing natural gas into the natural gas vehicle cylinder of a motor vehicle is disclosed. The natural gas dispensing system includes a pressure transducer and a temperature transducer for measuring the pressure and temperatu... | 06/30/1998 |
| 5755250 | Manifold and valve assembly for a smoke/pollution detection system A manifold valve assembly for use in a smoke/pollution detection system in which gas is drawn from a plurality of zones under surveillance and delivered to a smoke/pollution detector. The assembly has a manifold provided with a plurality of inlet ports co... | 05/26/1998 |
| 5694963 | Method and apparatus for freeze prevention of irrigation systems There is disclosed an apparatus for freeze prevention protecting an irrigation system. The response of the apparatus depends on environmental conditions. At a first temperature condition, the irrigation system is shut down. At a lower temperature conditio... | 12/09/1997 |
| 5638847 | Temperature sensitive water supply shut-off system A water supply control apparatus includes a flow sensor, connected to a supply line of an indoor plumbing network, which sends a flow signal to a controller when flow is detected. The controller includes a power circuit which is interrupted upon detection... | 06/17/1997 |
| 5577532 | Valve actuator An actuator has been developed for actuating a valve for controlling fluid flow in a conduit, the actuator having, in one aspect a housing with a main interior housing space, a rod with a mid-portion, a top end and a bottom end, the mid-portion movably di... | 11/26/1996 |
| 5539384 | Electronic water utility safety apparatus An electronic water utility safety apparatus comprising a control box positionable within the house of a user. A display indicates a sensed water pressure. An indicator is mounted in the box to generate an audible signal upon the pressure being modified f... | 07/23/1996 |
| 5445176 | Moisture sensitive irrigation valve control A moisture control system which overrides power supplied to electrically operated irrigation control valves such that a preset amount of moisture content of soil is not exceeded. The system is composed of two components, a remote detector, which is dispos... | 08/29/1995 |
| 5402815 | Temperature sensitive water supply shut-off system A water supply control apparatus for a household plumbing system having a main water supply line includes a shut-off valve disposed in the main water supply line, electric motor means for actuating the shut-off valve and being operable to move between ope... | 04/04/1995 |
| 5373957 | Low expulsion vent for an automotive fuel tank A fuel tank has a filler pipe to which a vent pipe is attached on one end and which divides into two openings on the other end within the fuel tank. One opening is positioned below the other opening relative to the top of the fuel tank and has means for p... | 12/20/1994 |
| 5343905 | Vehicular fuel tank vent An automotive type fuel tank has a fuel fill pipe with automatic pressure responsive fuel shutoff means, and a vapor vent assembly. The assembly has a small tube extending down through the top of the tank to below the normal fuel level of a full tank. The... | 09/06/1994 |
| 5344117 | Micro-actuator A micro-actuator includes force elements and compensation elements arranged on a bending element such that a change in the environmental temperature does not cause any flexing of the bending element.... | 09/06/1994 |
