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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 |
| 7219468 | Automatic watering device for hanging baskets and planter boxes An apparatus for automatically watering a plant in a container by regulating a flow of water to the container through flexible tubing. Upper and lower jaw members are interconnected by a horizontal pivot axis so that they develop a scissors action. A jaw area is for... | 05/22/2007 |
| 7057369 | System and device for regulating the position of a drivable component and drive therefor A system for detecting the position of a component drivable by a control element drive, the system comprising: a position sensor housed in a position regulator housing, a movable motion representative to be driven by an actuating motion of the component, via which m... | 06/06/2006 |
| 5950692 | Arrangement for limiting the fill level of a fuel tank In an arrangement for limiting the fill level in a fuel tank having a filler neck with a tank inlet end, a valve flap is pivotally supported in the inlet end such that, in an open position, the valve flap is pivoted toward the fuel flow entering the tank ... | 09/14/1999 |
| 5715856 | Liquid flow control apparatus A liquid flow control apparatus (5) suitable for handling milk from a milking machine, comprising a first chamber (10) that comprises an inlet (11) for the milk, an outlet (12) for connecting to a vacuum pump, and an outlet (14) for the milk to flow by gr... | 02/10/1998 |
| 5421515 | Automatic irrigation device An automatic irrigation device for plants which is automatically activated in correlation with the evapotranspiration needs of the plants comprises an open-top fluid evaporation pan containing the irrigating fluids, the fluids being capable of evaporating... | 06/06/1995 |
| 5361795 | Furnace waste water freeze protection method A method to prevent freezing of water in a conduit that carries the water out of a building. The method uses a device that alternately accumulates the water in a container and then dumps it. The water is then carried to the outside of the building through... | 11/08/1994 |
| 5240033 | Drink dispenser having a pivoted liquid supply tank including a plug-in connector assembly The storage tank for providing liquids to a unit further processing these liquids comprises in its bottom area a plug-in connection for a drawing unit, and in the area of this elastically designed plug-in connection, a pivot bearing is placed offset to th... | 08/31/1993 |
| 4917831 | Buoyant tank carbonator pump control for post-mix beverage apparatus A carbonator unit for a post-mix beverage dispenser having a carbonator tank immersed in a liquid flotation tank. The carbonator tank floats up and down with changes in the amount of water and head space in the carbonator tank to actuate a switch device m... | 04/17/1990 |
| 4838731 | Septic tank distribution box system A system for leaching septic effluent is disclosed which includes a concrete distribution box having inlet and outlet openings formed therein located at different levels. An open-topped tray pivotally mounted in the distribution box at a level located bet... | 06/13/1989 |
| 4714177 | Device for the metering of a chemical, particularly for seed treatment To avoid internal and external soiling in a device for the metering of chemicals, particularly for seed treatment, a special storage system unit (1) is provided which can be loaded with disposable packages (3a, 3b, 3c) which are connected by means of coup... | 12/22/1987 |
| 4455139 | Intravenous liquid leveling device The surface of the intravenous liquid in a container is maintained at substantially constant height above the patient by suspending the container from an elastic member which stretches along an axis other than the suspension axis for the container. In thi... | 06/19/1984 |
| 4448210 | Apparatus and method for controlling the level of a liquid in a tank The invention disclosed herein is a "fail safe" apparatus for controlling the level of a liquid in a tank. The apparatus includes a holding tank for temporarily containing the liquid. There is an access opening along the top surface of the tank so that th... | 05/15/1984 |
| 4357827 | Gravimetric absorbency tester An apparatus for determining the weight of liquid flowing to or from a test site is described. The apparatus comprises, in combination: a vessel for containing liquid, the vessel being supported solely by a balance; an indicator for indicating the weight sense... | 11/09/1982 |
| 4286618 | Valve A water control valve particularly suited for use with poultry watering apparatus having a deformable rubber sleeve lining the interior of the valve housing. A pair of piston members are arranged to pinch the sleeve and thus cut off the flow through the v... | 09/01/1981 |
| 4280528 | Waste water conveyance apparatus An arrangement for conveyance of waste water or liquid by vacuum operation, including a vertically movable container in which the waste water is collected. By causing the weight of the liquid to surmount a spring force and a force originating from the vac... | 07/28/1981 |
| 4241538 | Device for automatically watering plant containers A pair of lever arms are hinged together at one end and disposed beneath a plant container, compression spring being disposed between the other ends of said lever arms and a flexible water supply hose being sandwiched between said lever arms intermediate ... | 12/30/1980 |
| 4034775 | Sequencing valve The present invention relates to an improved sequencing disk means for fluid handling in a sequencing valve having a plurality of outlets. Sequencing valves deliver fluid from the inlet sequentially out through one or more fluid outlets in a predetermined... | 07/12/1977 |
| 3938539 | Apparatus for leading off air in connection with the measuring of the flow of a liquid An apparatus for leading off air from liquid, preferably blood, and for measuring the flow of liquid through the apparatus which comprises two chambers separated by a partition formed with a throughflow aperture. One chamber is movable in relation to the ... | 02/17/1976 |
