Did You Know...
...that after Walter Hunt patented the safety pin in 1849, he sold the rights to it for $400?
PatentStorm News
Make the Most of Our Site
See this month's Top Inventors and Most Cited Patents.
Stay on top of the latest innovations by subscribing to an RSS feed.
Registered users: Manage your profile.
| Number | Title | Issue Date |
| 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 |
| 6918760 | Shaft pre-heater A shaft preheater to achieve an improved adaptation of layer height to particle size spectrum of material to be preheated. The shaft preheater includes a plurality of shafts for receiving lumpy material, an arrangement for filling the individual shafts with the lump... | 07/19/2005 |
| 6280181 | Withdrawal device for a shaft furnace The invention relates to a shaft furnace (1), in particular a direct-reduction shaft furnace, having a bed (2) of lumpy material, in particular lumpy material containing iron oxide and/or iron sponge, having worm conveyors (3) which penetrate through the ... | 08/28/2001 |
| 6213762 | Shaft furnace The invention relates to a shaft furnace (1), particularly to a direct-reduction shaft furnace, with a bed (2) of lumpy material, particularly lumpy material containing iron oxide and/or sponge iron, with discharge devices (4) for lumpy material which are... | 04/10/2001 |
| 6162050 | Furnace for the direct reduction of iron oxides Gravitational type furnace for the direct reduction of mineral iron comprising a median reaction zone (14) in which the reactions to reduce the mineral iron occur, means (11) to feed the mineral iron to said reaction zone (14), means (18) to introduce a m... | 12/19/2000 |
| 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 |
| 5915959 | Method and apparatus for preheating particulate material A preheating apparatus for particulate material includes a plurality of vertical chambers, a temperature sensor within each chamber and a particulate discharge mechanism. Each chamber is segregated from an adjacent chamber by a vertical wall and includes ... | 06/29/1999 |
| 5829968 | Charging device for a shaft furnace A charging device for a shaft furnace with a lower bell comprises lower means of blockage allowing an upper hopper to be isolated in a sealed manner from a lower hopper and allowing the retention of the charging material. In their open position, these low... | 11/03/1998 |
| 5779467 | Method and apparatus for preheating particulate material A preheating apparatus for particulate material includes a plurality of vertical chambers, a temperature sensor within each chamber and a particulate discharge mechanism. Each chamber is segregated from an adjacent chamber by a vertical wall and includes ... | 07/14/1998 |
| 5769627 | Vertical type calcination kiln A storage device 23 for storing a raw material to be calcined is provided at a position above a kiln cover 1, and the storage device 23 is connected to a preheating space 22 in such a manner as to be capable of dropwise supplying the raw material into the... | 06/23/1998 |
| 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 |
| 5460517 | Shaft kiln for burning a lumpy mineral charge The kiln operating according to the parallel-flow-regenerative process has two shafts (2, 3), which at the transition from the burning zone (14) to the cooling zone (15) have a widening forming an inner step (38) at which the combustion gases are transfer... | 10/24/1995 |
| 5144108 | Kiln for producing litharge by means of the calcination of massicot The kiln (1) for producing litharge has a thermally insulated tubular body (2) containing, throughout its length, a shaft (30) with paddles acting as an auger. The tubular body (2) is coaxial with an induction coil (11), which heats it. The raw material i... | 09/01/1992 |
| 4948364 | Lime kilns An annular, vertical shaft kiln comprising a cascading process path with varying cross sectional area, in which the coarse charge particulants tend to follow the longer path near the walls as does the gas being injected into the mid-region of the kiln, wh... | 08/14/1990 |
| 4881869 | Furnace charging throat construction In a throat stopper for shaft furnaces, in particular blast furnaces with two hoppers of which an upper hopper is rotatable through a drive device, the upper hopper is designed, by a stationary hood equipped with charging flap valves, as a sluice chamber ... | 11/21/1989 |
| 4767322 | Apparatus for charging a shaft furnace Apparatus for charging a shaft furnace for calcining and sintering material in lump form, such as limestone, dolomite, magnesite or the like, with granular bulk material, with a charging silo arranged above the furnace shaft having a substantially circula... | 08/30/1988 |
| 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 |
| 4708642 | Process for the thermal and/or chemical treatment of grained, granular or lump material In the process for the thermal and/or chemical treatment of grained, granular or lump material in plane heaps, the latter are transported with free intervals, in stages, from top to bottom through a shaft and are traversed by gases. The heaps lay on grate... | 11/24/1987 |
| 4664623 | Process and apparatus for the thermal treatment of trickling material swellable or rendered swellable, and containing aluminosilicates In the thermal process for treating swellable granulates of clay or the like, the granulates are entered in heaps (4) with free intervals between them into a shaft (1) and traverse said shaft (1) by stages from top to bottom. The heaps (4) are supported b... | 05/12/1987 |
| 4655791 | Apparatus and method to achieve gasification of bark and the like A system and method to achieve gasification of bark pieces, that includes a vessel to receive the bark pieces which are introduced at an upper region of the vessel and are burned at a lower region, which bark pieces settle from the upper region downward t... | 04/07/1987 |
| 4644932 | Method and device for energy recovery by manufacturing of asphalt in bulk Method and device for manufacturing of asphalt bulk masses where a substantial part of the heat energy of the furnace gases from the drying and mixing process is transferred to the bulk mass fractions before those are supplied to the drying and mixing pro... | 02/24/1987 |
| 4599068 | Apparatus for preheating granular ore An apparatus for preheating granular ore includes a shaft defined by vertical walls, an inlet chute disposed above the shaft for introducing the ore thereinto by gravity, an ore discharge collector situated underneath the shaft for receiving preheated ore... | 07/08/1986 |
| 4413812 | Apparatus for discharging hot flowable solids, particularly sponge iron, from a shaft furnace Apparatus for discharging hot flowable solids comprises conical conveyor screws, which are arranged to form a star-shaped array and contained in respective conveyor troughs and at their inner ends are rotatably mounted in a centrally disposed hollow body.... | 11/08/1983 |
| 4407489 | Apparatus for discharging hot flowable solids from an upright container, particularly for discharging sponge iron from a shaft furnace A discharge implement is provided, which is operable to discharge sponge iron from a shaft furnace and constitutes the bottom structure of the shaft furnace and is formed with flow passages for a cooling liquid. In order to ensure a uniform discharge, the... | 10/04/1983 |
| 4351119 | Apparatus and method for drying compact, vitrifiable mixtures In apparatus and method for treating granular product within a cylindrical chamber as the product, by the force of gravity, falls through a plurality of regions maintained at varying temperature and pressure. Structure formed by at least a pair of collect... | 09/28/1982 |
| 4337031 | Preheating apparatus An apparatus for preheating particulate material in which the particulate material is transferred from an upper storage bin to a lower annular flow passage by a plurality of connecting chutes and the particulate material is preheated in the annular flow p... | 06/29/1982 |
| 4254221 | Method of burning lump-sized combustible material, and an annular shaft kiln for carrying out this method This invention deals with a method of burning crushed or lump-sized combustible material, such as limestone, dolomite, magnesite or a similar material, in an annular shaft kiln having an annular outer shaft and an inner shaft, where the annular and the in... | 03/03/1981 |
| 4243379 | Shaft preheater A mechanism and method for preheating a coarse fraction and a more fine limestone fraction in a shaft preheater including a first central vertical inlet for receiving the coarse fraction which forms a descending core in a vertical preheating chamber, and ... | 01/06/1981 |
| 4207061 | Top-shaped lime kiln In a top-shaped lime kiln which comprises a slowly rotatable platter-shaped kiln bed having a cylindrical calcined lime-cooling chamber extending downward for connection to the central opening of said kiln bed; an immovably hung round lid having a fuel co... | 06/10/1980 |
| 4193760 | Apparatus and method for heating a plurality of solids In a device for raising the temperature of a plurality of solids which utilizes a heating chamber having at least one hot flue gas inlet and one or more solids inlet apertures to supply concurrent flows of solids and hot flue gas to a heating chamber, and... | 03/18/1980 |
| 4191529 | Furnace for heating solids The furnace is circular in plan and comprises an annular charge space charged through chutes in its top wall. Effluent gas offtakes are provided in the furnace outer wall and the level of the charge bed is maintained above the chute bottoms but below thos... | 03/04/1980 |
| 4134738 | Automated poking system for coal gasifier An automated poking system includes a plurality of pokerod assemblies positioned around the periphery of a two-stage, fixed-bed coal gasifier at two separate elevations. Each pokerod assembly includes an elongated pokerod selectively actuatable to extend ... | 01/16/1979 |
| 4094629 | Vertical kiln apparatus The apparatus of this invention is a vertical shaft kiln designed for firing aggregate materials. In a specific application the kiln is used to fire limestone aggregate (crushed limestone) to produce lime. The kiln chamber in this apparatus is defined by ... | 06/13/1978 |
| 3947239 | Descending bed of sub-divided solid material A method of processing granular material by passing a gas in contraflow to a bed of the material descending in an independently rotatable annular chamber of annular width a surmounting an annular eccentrically rotating floor, the outer bed wall being in g... | 03/30/1976 |
