Did You Know...
...When G.G. Hubbard learned of his future son-in-law's invention, he called it "only a toy." His daughter was engaged to a young man named Alexander Graham Bell.
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| Number | Title | Issue Date |
| 4086161 | Ecological system and method An ecological system and method for counteracting the effects of excessive nutrient deposition (eutrophication) in bodies of water such as marshlands, inland ponds and lakes. The system makes use of clusters of substantially individualized bark fibers pos... | 04/25/1978 |
| 4075096 | Suction device for an oil separation tank A suction device for an oil separation tank mounted on a floating body comprises a liquid piping structure for transporting floating oil from the oil separation tank into a storage tank and a vacuum piping structure for always retaining floating oil in th... | 02/21/1978 |
| 4060574 | Device for lake restoration by oxygen-enriching of the water A method and a device for restoration of lakes by oxygenation of the water. A lake having a depth exceeding 8-10 meters is oxygenated by air-treatment of the lower and colder hypolimnion layer only. Air is introduced into the hypolimnion and is prevented ... | 11/29/1977 |
| 4053412 | Collecting device for a swimming pool A floating support defines an open area, and it removably holds a net adjacent that open area. That floating support holds the leading edge of that net below the surface of a circulating body of water in a swimming pool, but it holds the trailing edge of ... | 10/11/1977 |
| 4046691 | Method for collecting light-weight substance floating on a liquid surface Method of collecting light-weight substance floating on a liquid surface, for example, oil floating on water, said light-weight substance being carried into a collecting reservoir, in that on the outer side of a wall of the collecting reservoir extending ... | 09/06/1977 |
| 4046693 | Scum skimmer apparatus Scum skimmer apparatus having a skimmer blade slideably disposed on support rods extending downwardly from an oscillating bridge which is moveable over the clarifying tank in a biological waste treatment plant. An air tight ballast chamber is secured to t... | 09/06/1977 |
| 4043140 | Cryogenic beach cleaner A method and machine are disclosed herein for cleaning and restoring sand beaches which have become contaminated by oil spills. The machine travels on the beach and sprays liquid nitrogen onto the contaminated area, thereby solidifying the oil and sand mi... | 08/23/1977 |
| 4040515 | Chemical dispensing apparatus A simplified chemical dispenser apparatus capable of dispensing a predetermined amount of a treatment chemical into a fluid includes a porous matrix exhibiting capillary action when the fluid contacts a surface of the matrix, a fluid treatment chemical co... | 08/09/1977 |
| 4040864 | Device and method for cleaning leaves and debris from swimming pools A device for cleaning leaves and debris from swimming pools comprising a reticulated bag having an open mouth and closed end. The mouth is connected to the nozzle of a high pressure water hose, which in turn is connected to an automatic swimming pool clea... | 08/09/1977 |
| 4032449 | Skimmer for a body of liquid with floating solids Skimmer apparatus for a pond or reservoir where the surface layer contains frangible solid matter. It employs a weir structure with a curved edge, and a pair of arms having interlocking teeth extending radially from the edge. One arm is stationary and one... | 06/28/1977 |
| 4032438 | Method and apparatus for ultrasonically removing contaminants from water Apparatus employing an ultrasonic focusing transducer is provided for removing a contaminant such as oil which is floating on the surface of a body of water. The transducer is supported beneath the water surface with its focal region aimed at the undersid... | 06/28/1977 |
| 4028249 | Sewage settling tank The efficiency of a sewage settling tank is improved by providing the tank with a plurality of submerged, vertically spaced decks which divide the tank into a plurality of horizontal settling layers. This improves the settling rate in that solids travel a... | 06/07/1977 |
| 4024063 | Floating-matter removing apparatus Apparatus for skimming matter such as oil, scum, and the like floating on water in rivers, lakes, oceans, water-tanks, settling-tanks. The apparatus is adapted to float on the water and comprises a vessel having a main floatable body with at least one inl... | 05/17/1977 |
| 4017394 | Water screen A water-powered, self-cleaning rotary strainer for use in drawing water from a running stream. A perforated drum is rotatably mounted on a frame. Drum rotation is done by using moving water. A float is mounted on the frame to support the drum in a partial... | 04/12/1977 |
| 4014795 | Oil boom for collecting and skimming oil on a water surface An oil boom for sweeping and collecting oil from the surface of a body of water is constructed of a framework of structural members arranged in the form of a box beam, the framework supporting two parallel rows of floating barrier screen panels and being ... | 03/29/1977 |
| 4011164 | Skimmer apparatus for sewage settling tanks and the like A scum removal system for sewage settling tanks and the like employs a floating skimmer system which is lowered onto the surface of the liquid at one end of the tank and then moved toward the opposite end where floating materials collected by the skimmer ... | 03/08/1977 |
| 4010103 | Automatic oil-water separating device An automatic oil-water separating device used within an oil-water separating container for skimming the oil off the top of the water and directing same through a collecting conduit to an associated container. The device includes a skimming trough supporte... | 03/01/1977 |
| 4008155 | Apparatus for disposal of effluents This invention relates to the treatment and disposal of effluent, particularly the treatment and disposal of sewage, by apparatus which is floatable in water and able to be located by moorings or otherwise for example at sea wherein sewage can be pumped o... | 02/15/1977 |
| 4008156 | Device for sucking the upper layer of a polluted water surface Device for sucking the upper layer of polluted water surfaces by proceeding to a selection of polluted floating materials, characterized in that it comprises means adapted to maintain naturally separated polluting materials from water for conducting them ... | 02/15/1977 |
| 3997444 | Sewage settling tank A sewage settling tank is provided with two or more banks of tube settlers to improve the settling rate. The tube settlers are spaced above the bottom of the settling tank and upstanding from about the periphery of each bank is a baffle member which defin... | 12/14/1976 |
| 3988241 | Floating device for removing refuse situated on and under a water surface Floating device to remove refuse situated on and under a water surface, comprising a first and a second floating body and a hose-type duct with which the two floating bodies can be connected together via connecting openings, a water inlet feature and a mi... | 10/26/1976 |
| 3985653 | Rotary apparatus adapted to bring at least two media of different weight into alternate contact with the apparatus surfaces A rotary apparatus which is adapted to bring at least two media of different density into alternate contact with the apparatus surfaces, preferably for the purification of one medium, is formed by a body which is closed except for ingress and egress apert... | 10/12/1976 |
| 3970556 | Floating skimmer for cleaning the surface of a body of liquid, method and apparatus A floating skimmer, for cleaning the surface of the liquid around the skimmer, has an outer, annular shaped body with an inner cavity. Flotation and ballast chambers in the outer body regulate the level of flotation of the weir, and a peripheral opening a... | 07/20/1976 |
| 3966615 | Oil collection barge A device which collects and then contains and concentrates oil spills on the surface of water. This action is affected by the flow of water and oil relative to a channel with an adjustable water and oil intake funnel at the forward end, an oil blockage wa... | 06/29/1976 |
| 3944489 | Apparatus for pumping oil-water mixture from a collection vessel of a floating oil collector into settling tanks Apparatus for pumping oil-water mixture from the collection vessel of a floating oil collector into settling tanks comprises at least one oil receiving means for collecting oil-water mixture, arranged below the level of the liquid in the collection vessel... | 03/16/1976 |
