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A forehead support apparatus for resting a standing users forehead against a wall above a bathroom commode or urinal or beneath a showerhead.
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| Number | Title | Issue Date |
| 5375817 | Hot blast stove and method for constructing a hot blast stove In the construction of a hot blast stove, walls are made of pre-formed and baked bricks. At the joint between two walls, cast joining elements of complex shape are incorporated. The cast joining elements may be cast in situ. This avoids the need for press... | 12/27/1994 |
| 5052922 | Ceramic gas burner for a hot blast stove, and bricks therefor A ceramic gas burner for a hot-blast stove has a burner crown essentially composed of a plurality of shaped bricks which define terminal portions of at least one combustion air duct and at least one gas duct of said burner for flow of respectively combust... | 10/01/1991 |
| 5033958 | Burner for a hot-blast furnace A burner for a hot-blast furnace has a guidance portion, a channel portion and a mixing portion. The guidance portion serves as an air and gas intake, and is divided into a plurality of separate compartments by thin walled plates. Some of the compartments... | 07/23/1991 |
| 4997362 | Ceramic burner A ceramic burner is provided, particularly for use in a hot-blast oven, with a generally cylindrical wall defining a central burner duct and a housing extending around and spaced from the generally cylindrical wall to define an outer annular duct disposed... | 03/05/1991 |
| 4881895 | Ceramic gas burner for a combustion chamber of a hot-blast stove A ceramic gas burner for a combustion chamber of a hot-blast stove of a blast furnace has parallel vertical supply ducts for the two combustion components (gas and air). One duct opens upwardly at a first outlet opening which is rectangular in shape. The ... | 11/21/1989 |
| 4863378 | Ceramic burner for a hot-blast stove A ceramic burner for a hot blast stove, having a burner head where the combustion components mix and an air duct and a gas duct beneath the head for conducting combustion components to the head, the gas duct is within the air duct and is bounded by a wall... | 09/05/1989 |
| 4757770 | Condensate sand collection system A sand collection system includes a column of coarse sand within a cylindrical container coaxially mounted to the output end of a furnace conduit through which heated gases containing sublimate will pass. A layer of gas permeable material holds sand in po... | 07/19/1988 |
| 4677739 | High density CMOS integrated circuit manufacturing process A semiconductor device such as a dynamic read/write memory or the like is made by a twin-well CMOS process that employs a minimum number of photomasks. Field oxide isolation areas are formed in nitride-framed recesses so a relatively plane surface is prov... | 07/07/1987 |
| 4582485 | Blast furnace stove The burner means for a blast furnace stove having a vertical shell, a combustion chamber adjacent the inside wall of the shell and checkers in the shell includes a generally horizontal first tube extending from the outside of the shell into communication ... | 04/15/1986 |
| 4508504 | Blast heating apparatus for blast furnaces A blast heating apparatus includes an inner metal shell having therein a refractory lining. An outer metal shell surrounds at least a portion of the inner metal shell and defines therewith a double shell structure. Spacers are positioned between the outer... | 04/02/1985 |
| 4478575 | Blast furnace stove outlet A blast furnace stove having a hot blast outlet which is configured in a particular elliptical-shaped so that all the bricks in its peripheral refractory reinforcing wall are substantially identical in shape and dimension. The center line of this outlet p... | 10/23/1984 |
| 4470800 | Ceramic burner for a hot blast stove There is disclosed in a ceramic burner comprising a base, a crown disposed on an opposing end to said base and therebetween a housing defining a combustion chamber, a first conduit entering said housing and communicating therein with a gas chamber in turn... | 09/11/1984 |
| 4460335 | System for preventing excess pressure in a gap between a double-shell structure of a blast heating apparatus A blast heating apparatus includes an inner metal shell and an outer metal shell defining therebetween a gap filled with at least one pourable dry material, for example a mixture of SiC and graphite. To prevent excess pressure in the gap and to prevent co... | 07/17/1984 |
| 4419075 | Blast furnace stove wall An internal partitioning wall for a blast furnace stove in which a layer of insulating material is interposed between two layers of refractory material. Buttressing means such as integral, refractory ledges are provided at periodic vertical intervals from... | 12/06/1983 |
| 4375956 | Hot blast stove arrangement for a blast furnace In a support construction for a hot blast main which is connected by respective branches to the outlets of a plurality of hot blast stoves of a blast furnace, the main is suspended on each stove by means of a rod system secured to a stiffened transitional... | 03/08/1983 |
| 4369954 | Regenerative air preheater with improved insulation between combustion chamber and checker shaft A regenerative air preheater includes a masonry casing having therein a combustion chamber and a checker shaft with checker bricks, and a separating wall between the combustion chamber and checker shaft. A space is provided between the separating wall and... | 01/25/1983 |
| 4353688 | Baffle structure for blast furnace stove A hot blast stove for use with high capacity blast furnaces incorporates a gas flow baffle particularly configured for improving mixture of combustion air and gas within the combustion chamber to enhance fuel burning characteristics with a concomitant red... | 10/12/1982 |
| 4313724 | Ceramic burner for use in an air heater A ceramic burner includes a fuel gas supply conduit having a gas delivery region opening into a mouth portion and a mixing and aspiration region communicating with the gas delivery region, and an air supply conduit having nozzles opening into the mixing a... | 02/02/1982 |
| 4290751 | Blast furnace stove A hot blast stove for preheating combustion air for an associated blast furnace, having a continuous, substantially cylindrical shaped peripheral wall extending from a base to a domed cover. The peripheral wall includes a first cylindrical portion defined... | 09/22/1981 |
| 4259064 | Ceramic burner A ceramic burner for the combustion chamber of air heaters and the like has a mixing body composed of layers of shaped ceramic bricks, the shaped bricks adjoin each other with radial flanks and engage and mutually interlock with one another by knobs or pr... | 03/31/1981 |
| 4235593 | Blast stove A blast stove having adjoining combustion and checker chambers, for use with a blast furnace. A support structure, mounted within the checker chamber, supports tiers of interlocked checkerbricks. The support structure includes vertically extending columns... | 11/25/1980 |
| 4201543 | Hot blast stove breast wall A breast wall construction of a blast furnace hot blast stove includes a free-moving vertical arch composed of reverse wedge interlocking refractory shapes which form a monolithic unit upon differential heat expansion of the breast wall when the blast sto... | 05/06/1980 |
| 4145033 | Hot blast stove and method of operation Intercrystalline stress corrosion of the walls of heat exchangers employed to produce hot air for injection into a blast furnace, particularly the wall of the passage interconnecting the combustion and heat exchange chambers, is avoided by eliminating pre... | 03/20/1979 |
| 4086052 | Ceramic burner for combustion chamber for hot-blast stove A burner includes a central burner duct for passing combustion gas therethrough and an outer annular duct for the passage of combustion air and coaxial to the central burner duct. The ducts open or join at an opening area, upstream of which are one or two... | 04/25/1978 |
| 4054409 | Swirling burners for use in hot blast stoves The swirling burner comprises a vertical combustion chamber and an annular blast member located beneath the combustion chamber and provided with a central cylindrical space and a plurality of alternately superposed fuel gas passages and air passages. Thes... | 10/18/1977 |
| 4022573 | Hot blast stove and method of operation Intercrystalline stress corrosion of the walls of heat exchangers employed to produce hot air for injection into a blast furnace, particularly the wall of the passage interconnecting the combustion and heat exchange chambers, is avoided by eliminating pre... | 05/10/1977 |
| 4005982 | Hot-blast stove for a blast furnace A shaft casing has a funnel-shaped widened upper portion connected to a cupola casing. Between the widened portion and a refractory shaft lining is a supporting frame having a platform on which a cupola lining rests. The frame is connected to the lower en... | 02/01/1977 |
| 3947245 | Hot blast stove In a hot blast stove, a shell structure comprises a checker brick chamber and a common upper portion of the shell embraces a combustion chamber having a length substantially less than the shell structure that is mounted contiguously alongside of and exter... | 03/30/1976 |
