Did You Know...
...that power steering was invented by independent inventor Francis W. Davis? As chief engineer in the 1920s of the truck division of the Pierce Arrow Motor Car Company, he saw how hard it was to steer heavy vehicles. So that he would be able to keep the profits from his future invention, Davis left his job, rented a small engineering shop in Waltham, Mass., and developed a hydraulic power steering system that led to power steering.
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| Number | Title | Issue Date |
| 7384263 | Process for burning lumps of material with lean gas A method for burning lumps of material, in particular limestone, is carried out in a regeneration shaft kiln (3) with at least two kiln shafts (1, 2) interconnected by an overflow line (19) and in which the material to be burned passes through a... | 06/10/2008 |
| 7357632 | Automated wood-fired pottery kiln A kiln and method of firing a kiln are provided for use in connection with the firing of small-scale pottery firing. The kiln includes a kiln wall that defines a main kiln volume that is no larger than 60 cubic feet and is less than 10 cubic feet in one embodiment. ... | 04/15/2008 |
| 7195480 | Shaft preheater The invention relates to a shaft preheater for preheating material in lump form with at least one shaft for receiving the material, a bridge disposed in the shaft for delivering hot gases which flow through the material from the bottom upwards, and a device for fill... | 03/27/2007 |
| 6981831 | Variable device for bulk material distribution with rotary chute having variable angle of inclination A device for distributing bulk materials includes a suspension rotor is mounted in a support frame which is capable of rotating about a substantially vertical axis of rotation. A chute is suspended to the suspension rotor and is tiltable about a substantially horizo... | 01/03/2006 |
| 6948930 | Furnace head or furnace throat seal A blast furnace head (11) including a material loading device comprising rotary chute (14) driven in rotation about a first, vertical axis of rotation (16), and a loading chute (15) at the outlet of same, driven in rotation about a second... | 09/27/2005 |
| 6926522 | Method and apparatus for preheating particulate material An apparatus for preheating particulate material in which the particulate material is transferred from one or more upper storage bins to a circular lower chamber that has an outer, essentially annular, portion which serves as a gas flow passage. The particulate mate... | 08/09/2005 |
| 6857872 | Device for loading a shaft furnace A loading device for a shaft furnace comprises a chute supported by a suspension rotor (28) in a fixed housing. The rotor (28) is fitted with a cooling circuit, supplied with liquid coolant via a rotating annular joint (44). The latter comprises... | 02/22/2005 |
| 6453831 | Method for burning lumpy combustion material, especially limestone, dolomite and magnesite, and regenerative shaft furnace for carrying out this method A method for burning lumpy combustion material, in particular limestone, dolomite and magnesite, in a regenerative shaft furnace comprising at least two shafts (1, 2) comprised of a preheating zone (A) as well as a combustion zone (B). The shafts are conn... | 09/24/2002 |
| 6120284 | Reclaiming foundry sand by gravity flow system A method of reclaiming foundry sand by (a) providing a treatment tower having a plurality of heat conductive tubes extending across the interior of the treatment tower, the tubes being arranged in rows and staggered with respect to tubes in adjacent rows ... | 09/19/2000 |
| 6113387 | Method and apparatus for controlling kiln A regenerative shaft kiln having at least two vertical shafts and a plurality of lances for introducing fuel into the kiln, with one or more sensor provided proximate a plurality of the lances, each of the sensors producing a first output signal having a ... | 09/05/2000 |
| 5984671 | Sealing device useful for providing air-seal self-controlled discharge of product from a process equipment such as a vertical shaft kiln This invention relates to a sealing device useful for attachment to a process equipment such as vertical shaft kiln (VSK) for providing air-seal self-controlled discharge of product from the said equipment, which comprises a chamber (1) having at its top ... | 11/16/1999 |
| 5890889 | Shaft furnace An improved hearth section for a shaft furnace may comprise a plurality of splines mounted to the side wall of the hearth section in spaced-apart circumferential positions so that each of the splines extends radially inward from the side-wall and into the... | 04/06/1999 |
| 5738511 | Vertical shaft kiln This invention relates to a a vertical shaft kiln (VSK) useful for manufacturing cement and other allied products, which comprises a rotary nodule feeder for feeding the raw materials, fitted above the kiln bed for uniform distribution of nodules of the r... | 04/14/1998 |
| 5702246 | Shaft furnace for direct reduction of oxides A shaft furnace for reduction of oxides includes a shaft member having an oxide inlet and defining a pre-heating and pre-reducing zone downstream of the oxide inlet, a reducing zone downstream of the pre-heating and pre-reducing zone a transition zone dow... | 12/30/1997 |
| 5685709 | Apparatus for heat treatment of lime sludge Disclosed is a method and an apparatus for the heat treatment of lime sludge (CaCO3) to form burnt lime (CaO). In the method of the present invention lime sludge is dried in a gas dryer means, to produce a dried lime sludge. The dried lime slud... | 11/11/1997 |
| 5595482 | Airlocking system and method for feeding bulk granular material A control measuring and supply apparatus and method for receiving a substantially, continuous flow of fluent material from a source of supply; the assembly having a bottom-sealed diverter plate, optionally positionable to direct the fluent material, by gr... | 01/21/1997 |
| 5588828 | Vertical bright annealing furnace for continuous heat treatment of metal strips A vertical bright-annealing furnace 1 for metal strips includes a muffle-type heating station 12, a refractory-type heating station 13. The refractory-type heating station 13 includes a shell 24 lined with a heat-insulating material 26 and a second heater... | 12/31/1996 |
| 5580241 | Multistage circulating fluidized bed A circulating fluidized bed thermal reactor such as a boiler or gasifier, having the riser divided into a sequence of stages by a plurality of restrictions which create multiple beds dynamically suspended. Circulation occurs below transport velocity, soli... | 12/03/1996 |
| 5401166 | Method and furnace for burning waste A method and a combustion furnace are provided by means of which waste which is predominantly of organic nature can be burnt effectively and uniformly. The combustion furnace comprises two bottlenecks, one above the other, constituted by rocking grates. T... | 03/28/1995 |
| 5165888 | Gravity flow thermal process for reclaiming foundry sand A method and apparatus for thermally reclaiming used foundry sand is disclosed. The apparatus includes a vertically disposed furnace having a combustion chamber therein. A sand dispersion system supported within the combustion chamber disperses the free f... | 11/24/1992 |
| 5125943 | Combined batch and cullet preheater with separation and remixing An improved method preheating cullet and glass batch together for use as feedstock for a glass furnace. The method uses a preheater including a separator and a heat exchanger. The heat exchanger is a direct contact raining bed in which large particles in ... | 06/30/1992 |
| 5118288 | Cement advanced furnace and process A suspension shaft furnace and process for producing clinkers from discrete pellets of cement-forming batch materials, the furnace having a top vertical shaft section comprising a pellet-feeding and preheating zone, an intermediate fluidized bed section c... | 06/02/1992 |
| 5110288 | Gravity flow thermal process for reclaiming foundry sand A method and apparatus for thermally reclaiming used foundry sand is disclosed. The apparatus includes a vertically disposed furnace having a combustion chamber therein. A sand dispersion system supported within the combustion chamber disperses the free f... | 05/05/1992 |
| 5013237 | Oven for dehydrating pulverulents, sand or granules Oven for dehydrating pulverulents, sand or granules, comprising an energy-saving dehydration device, adapted to gypsum burning. The device consists of an outer casing, an inner casing and flow cones disposed on said casings. A burner and a lock complete t... | 05/07/1991 |
| 4867676 | Thermal decomposition furnace An apparatus for the thermal decomposition of a fluid toxic substance contained in a gas comprises a cylindrical main combustion chamber and a secondary combustion chamber arranged thereabove. An inlet opening leads into the main combustion chamber at an ... | 09/19/1989 |
| 4854861 | Process for calcining limestone The present invention relates to a novel process and to an installation for performing the process for calcining limestone for producing lime of different qualities, while being able to entirely or at least substantially do without conventional energy car... | 08/08/1989 |
| 4797092 | Cullet preheater A preheater for cullet is disclosed, in which hot gas coming from a hot supply duct can be passed through the cullet while yielding heat to the latter and can be carried away through a hot gas exhaust duct. The cullet is guided between guiding walls formi... | 01/10/1989 |
| 4764107 | Shaft arrangement for thermal and/or material transfer processes between a gas and bulk material An apparatus for gas/solids exchange has a column having a plurality of vertically spaced grates on which the granular solids can form beds to be traversed by the gas. Each grate is provided in a grate plane by a plurality of fixed grate bars interdigitat... | 08/16/1988 |
| 4747773 | Shaft kiln utilized for lime production A vertical shaft kiln utilized in calcining limestone defines a series of processing zones including an upper preheating zone, a first calcining zone, a second calcining zone having a length twice that of the first calcining zone and a material cooling zo... | 05/31/1988 |
| 4668184 | Annular shaft kiln An improved annular shaft kiln for burning particulate material such as limestone which adds a bridge to the lower part of the annular material zone between the burning zone and the cooling zone. This bridge permits heated cooling gas and at least some of... | 05/26/1987 |
| 4662841 | Method for burning and sintering limestone, dolomite and the like and plant for the implementation thereof A method and apparatus is disclosed for burning and sintering alkaline materials such as limestone and dolomite in a shaft furnace wherein the alkaline material travels successively through a preheating, burning and cooling area. At the upper end of the c... | 05/05/1987 |
| 4626200 | Shaft kilns having fluid-bed air heater The invention utilizes fluid bed air heaters for burning coarse solid fuels which supply heated gases to annular shaft kilns or double inclined shaft kilns. The solid fuels are introduced into a fluidized bed of inert material, such as sand, alumina or as... | 12/02/1986 |
| 4624636 | Two stage material cooler A two stage material cooling apparatus for cooling hot particulate material such as cement clinker discharged from a furnace such as the rotary kiln. The first stage includes a direct heat exchanger such as a reciprocating grate type heat exchanger or an ... | 11/25/1986 |
| 4592151 | Packing elements for device for countercurrent exchange, particularly heat exchange, between solid particles and a gas current Packing for a column for treating solid particles by direct contact between an ascending gas current and solid particles flowing countercurrent by gravity within the packing. The packing has an ordered structure, consisting of superposition of at least tw... | 06/03/1986 |
| 4519777 | Method and apparatus for bloating granular material A method of bloating a granular material residing in that a flow of rising gases heated to a temperature of 800°-1000° C. is formed, and a flow of raw granular material is formed to be introduced directly into said flow of rising gases at a velocity 1.5... | 05/28/1985 |
| 4494930 | Shaft furnace for heat treatment of finely dispersed materials A shaft furnace for heat treatment of finely dispersed material has a casing of rectangular cross section with a hopper built into a cover thereof. The top of the casing accommodates pipes for drawing off resultant gases. The casing also houses two groups... | 01/22/1985 |
| 4480991 | Process of and apparatus for operating a shaft furnace In a shaft furnace for burning limestone or similar raw materials, gaseous, liquid or solid fuels are supplied through fuel supply pipes to the burning zone of a furnace shaft. To permit the simultaneous supply of at least two different fuels, the fuel su... | 11/06/1984 |
| 4473352 | Double-incline shaft kiln In a double-incline shaft kiln in which ore materials are charged into the furnace from the top of a vertical external portion of the shaft and are calcined by burners installed in the lower portion of the shaft, the calcining zone is effectively extended... | 09/25/1984 |
| 4414186 | Method and apparatus for calcining limestone in a shaft kiln A method and apparatus for calcining minerals, particularly limestone, in a shaft kiln having at least two vertically spaced levels including cooled hollow supports through which a solid fuel is introduced into the kiln. One feature of the present inventi... | 11/08/1983 |
| 4403951 | Shaft furnace for burning or firing and sintering material in lump form or pellet form and with an internal burner A shaft furnace for burning or firing and sintering material, such as limestone, dolomite, etc in lump or pellet form, in which the cooling air is introduced into the external cooling air duct in the vicinity of the furnace bottom, flows upwardly through ... | 09/13/1983 |
