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...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 |
| 7374059 | Covering systems and venting methods A covering system that includes a first membrane, a first flotation member coupled to the first membrane. The first flotation member includes a first float and a first float compartment membrane, and the first float compartment membrane is coupled to the first membr... | 05/20/2008 |
| 7360671 | Liquid reservoirs A liquid reservoir comprising a container (20) forming a chamber for holding the liquid (27). The container has a top wall (23) that closes the upper end of the chamber, a liquid outlet (35) in fluid communication with a lower en d of the... | 04/22/2008 |
| 7270787 | Centrifuge sample jar and closure A centrifuge sample jar configured to maximize processed sediment accessibility and minimize leakage. ... | 09/18/2007 |
| 7073530 | Storage tank de-inventorying A method for emptying a liquid storage tank that has a floating roof which becomes stationery a finite distance above the tank bottom, wherein, after the roof becomes stationery, liquid is continued to be withdrawn from inside the tank while vapor is removed from wi... | 07/11/2006 |
| 6929142 | Removable hatch cover for an internal floating roof manway A hatch cover for deployment over a hatchway formed in a floating roof liquid storage tank permits rapid loading and unloading of inspection or maintenance equipment and minimizes vapor emissions from the tank. The portable hatch cover has two base plates movably co... | 08/16/2005 |
| 6920841 | Unitary construction animal feeder and method for manufacture An animal feeder has a feed hopper that has a filling end and a feeding end. The proximate ends of three or more legs are permanently attached to the feed hopper. A skid assembly is permanently attached to the distal ends of the three or more legs. ... | 07/26/2005 |
| 6465245 | Processor device with fume extraction A laboratory apparatus, such as a tissue processor, includes a container for containing material which may emit noxious fumes, the container having a closure moveable between an open position and a closed position in which it closes off or opens a mouth o... | 10/15/2002 |
| 6273287 | Vacuum-relief valve for the floating roofs of tanks for storing liquids The present invention relates to a device which is used in the floating roofs of tanks for storing liquids and is intended to prevent the formation of a vacuum between the stored liquid and the floating roof (5). More particularly, the device of the inven... | 08/14/2001 |
| 5938062 | Food dispensing package A food dispensing package having a container and a dispensing cover. The dispensing cover having a lid with a through hole to allow passage of a food product from within the container as the dispensing cover is pushed into the container. A closure element... | 08/17/1999 |
| 5576937 | Connector including a connector body, an annular air-tight material and a closure plate to seal an IC A connector for protecting an IC comprising a connector body, a closed plate, and an annular air-tight sealing material. An air-tight chamber is formed centrally of the annular air-tight sealing material by compressing the annular air-tight sealing materi... | 11/19/1996 |
| 5509562 | Floating roof A floating roof for use in a storage tank for oil or other liquid petrochemical products has a frame comprised of girders having grooved slots in top and opposite side surfaces thereof along substantially the entire lengths of the girders. The slots are c... | 04/23/1996 |
| 5499735 | Closure assembly for vacuum sealed containers An air valve apparatus for vacuum sealed containers comprises a cover having a groove at center portion and an aperture at center portion concentrically with respect to the groove. The aperture has projecting a pair of circular walls both from the upper s... | 03/19/1996 |
| 5339981 | Paint can sealer A sealing device for sealing the surface of contents of a container comprises a disc-like member having a central portion and a flexible perimeter and having a centrally located upstanding hollow handle having a purge valve at the upper end thereof. The p... | 08/23/1994 |
| 5213230 | Paint can sealer A sealing device for sealing the surface of contents of a container comprises a disc-like member having a central portion and a flexible perimeter and having a centrally located upstanding hollow handle having a purge valve at the upper end thereof. The p... | 05/25/1993 |
| 5212090 | Cover structure for a fermentation container There is disclosed a cover structure for use with fermentation and the like containers. The cover structure includes a lower cover having a plurality of layers of strips of material covering the container, with the strip layers angularly oriented to each ... | 05/18/1993 |
| 5147418 | Volatile liquid storage system A volatile liquid storage and emissions control apparatus and method comprising an above-ground volatile liquid storage tank having a bottom, a vertical circular wall and an external fixed roof, the tank having an internal floating roof, and air vents in ... | 09/15/1992 |
| 5005724 | Floating cover for the interior of a storage tank An internal floating cover for covering and sealing the surface of a liquid stored in a tank having an external roof, has a flexible thin-walled membrane which floats on the surface of the liquid. The membrane is provided with at least one float and a sea... | 04/09/1991 |
| 4907719 | Container for collecting, preserving, and serving hot beverages The present invention provides a container for storing, preserving and dispensing flowable comestible products. A floatingly retained, insulation lid tracks the level of the beverage and prevents oxidation, loss of volatiles and contamination of a beverag... | 03/13/1990 |
| 4732290 | Load isolating gas well A floating as well for a covered gas storage tank is provided which rests on the tank cover until enough gas is introduced into the tank to inflate a gas collection membrane. The stress loads created by an increasing volume of stored gas on the gas collec... | 03/22/1988 |
| 4723682 | Floating roof tanks for liquids, in particular to storage tanks used in the nuclear power industry The invention relates to floating roof tanks for liquids, of the type comprising a cylindrical wall (2), a floating roof (3), and a flexible membrane (4) connecting the periphery of the floating roof to the wall. In accordance with the invention, the tank... | 02/09/1988 |
| 4723674 | Leveled food preserver storage device container with floating lid A lid for use in combination with a container having smooth inner walls includes a central portion and a flexible annular lip which contacts the inner walls of the container and provides a seal between the lid and the walls. The lip includes a notch there... | 02/09/1988 |
| 4710292 | Digester tank with foam control cover The invention relates to apparatus for carrying out mixed liquid, gas and solid phase reactions and is intended for use in sewage digestion tanks where the removal of sludge and foam from the tanks is required. A reactor vessel is provided which includes ... | 12/01/1987 |
| 4705185 | Floating roof tanks for liquid, in particular to storage tanks used in the nuclear power industry The invention relates to floating roof tanks for liquids, of the type comprising a cylindrical wall (2), a floating roof (3), and a flexible membrane (4) connecting the periphery of the floating roof to the wall. In accordance with the invention, means ar... | 11/10/1987 |
| 4648968 | Floating cover tank with guides for vertical displacement of the cover A collecting and treating tank which holds liquid and in which a vertically movable cover floats on the liquid or on a gas layer above the liquid, comprising a tank having a vertical cylindrical circular wall, a bottom at and joined to the wall, and a cir... | 03/10/1987 |
| 4468975 | Gauge well float for floating roof storage tanks A gauge well float includes a sealed cylinder having rounded ends. A tube is disposed along the vertical axis of the cylinder and held in place by the rounded ends. A weighted cable suspended within the gauge well passes through the tube and keeps the flo... | 09/04/1984 |
| 4457446 | Vapor closure for flexures in floating In a liquid storage tank having a floating roof with a circular rim, a substantially ring-like vertical cylindrical shoe adapted to slide along the inside wall surface of the tank outwardly from the roof rim, a primary flexible seal extending from the roo... | 07/03/1984 |
| 4438863 | Gas venting floating cover A gas venting floating cover for a liquid container, the cover including a continuous sheet of flexible material adapted to lie upon the liquid in the container in coextensive relationship therewith for attachment to the container sides in fluid tight rel... | 03/27/1984 |
| 4413747 | Floating lid for a liquid storage tank A lid is described for floating on the surface of a liquid in a storage tank. The lid spans the tank interior and includes an inflatable peripheral seal arrangement selectively operable to seal the liquid within the tank upon inflation and, on deflation, ... | 11/08/1983 |
| 4391705 | Ballasting digestor covers A digestor includes a tank and an inverted dish-shaped cover, the lower end of which extends into sludge contained within the tank. The cover is ballasted by a number of ballast members which resemble tubs and which are integrally formed of concrete. Each... | 07/05/1983 |
| 4378437 | Digester apparatus An improved anaerobic digester 10 includes a cylindrical concrete sidewall 16 having a plurality of guide channel assemblies 40 bolted thereto at uniformly spaced locations along its circumference. The digester further includes a cover 18 adapted to be bu... | 03/29/1983 |
| 4199074 | Enclosed seal for open top volatile liquid storage tanks An open top tank for storing volatile liquids has a circular floating roof buoyantly supported on the surface of the stored liquid within a confining cylindrical shell of the tank. Adjustable sealing means extends between the roof and the top of the shell... | 04/22/1980 |
| 4189058 | Floating thermally insulating tank covers Open top tanks or ponds are provided with a thermally insulating floating cover which comprises a plurality of individual generally flat polygonal plates floating in edge-to-edge relationship. Each of the plates has at least one peripherally disposed down... | 02/19/1980 |
| 4067476 | Automatic sealing device for containers of volatile or perishable liquids An automatic sealing device for containers for volatile or perishable liquids. The sealing device includes a substantially cylindrical chamber having a flexible side wall to make a sealing engagement with the container wall. The flexible side wall is secu... | 01/10/1978 |
| 3980199 | Gas venting for floating cover A gas venting system for a liquid storage reservoir having a floating cover comprising a sheet of flexible material lying upon the liquid and attached to the reservoir sides. Elongated blocks of flotation material are attached to the underside of the cove... | 09/14/1976 |
