Patents by Inventor Wilhelm Stewen
Wilhelm Stewen has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).
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Patent number: 5598149Abstract: A common automation system for various partially interacting plant parts of a commercial-size, automatic industrial plant, and in particular, of a primary industrial plant such as a coke oven. The common automation system includes automation devices which carry out individual functions and which are connected by means of data lines to a master control unit and via the latter to one another. The automation devices are connected to one another via local data transmission units to exchange data directly, thereby defining automation groups individually capable of operating autonomously, according to the technological structure of the plant. The automation devices independently process the values from the plant and adjust, control, and regulate the plant components assigned to an automation group, distributed according to their programming based on the plant data supplied to them.Type: GrantFiled: March 28, 1994Date of Patent: January 28, 1997Assignees: Siemens Aktiengesellschaft, Ruhrkohle AktiengesellschaftInventors: Klaus-Dieter Schreiter, Wilhelm Stewen
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Patent number: 5421963Abstract: Coke feed device with housing (6) for a coke dry cooling installation which is allocated to a cooling shaft (41) and consists of a stationary hopper (1) with an extraction line (9), a movable hopper (2), a movable, liftable and lowerable cooling shaft closure (8) and the housing (6) containing the movable hopper (2) and the cooling shaft closure (8) which are arranged on a joint chassis (22) running on rails (49). The movable hopper (2, 200, 201) is fitted with a distribution bell (3, 4) and a liftable and lowerable sealing ring (11) and the movable cooling shaft closure (8) fitted with a sealing ring (55) is integrated into a lifting and lowering device (15) and the housing (6, 600, 601) takes the form of a hood clear of the floor or with apertures in the walls (45, 450, 451, 46, 460, 461) for a limited secondary air supply.Type: GrantFiled: July 8, 1993Date of Patent: June 6, 1995Assignees: Ruhrkohle Aktiengesellschaft, Nippon Steel CorporationInventors: Wilhelm Stewen, Heinz Opdenwinkel, Norbert Dunker, Naoto Yasukouchi, Kazushi Kishigami
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Patent number: 5279713Abstract: A door is equipped on its side facing the area to be closed off, with a sealing element disposed around the peripheral edges of the door, a door locking device to retain the door in a closed position, and possibly a thermal layer for insulating the door from passage of heat therethrough.Type: GrantFiled: March 6, 1992Date of Patent: January 18, 1994Assignee: Ruhrkohle AktiengesellschaftInventors: Klaus Wessiepe, Wilhelm Stewen
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Patent number: 5238252Abstract: A shut-off fitting with a sealing device consisting of a packing casing and a packing gland for the actuation element of the valve has the packing casing including bores that hold the sealing elements. The packing has at least one grooved metal ring with an elastic ring seal on the side facing the actuation element and the bore. As a seat for an elastic ring seal the packing gland features an oblique shoulder which descends toward the center, whereby the ring seal bears the pressure conveyed by a ring element and produced by a spring in the longitudinal direction of the axis of the actuation element.Type: GrantFiled: November 27, 1992Date of Patent: August 24, 1993Assignee: Eisenwerk Heinrich Schilling GmbH & Co.Inventors: Wilhelm Stewen, Norbert Holken, Klaus Stefaniak
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Patent number: 5150543Abstract: The door has a separate seal element and a hollow profile frame. The hollow profile frame has a number of tappets exending therefrom to press the seal element against a door frame. These tappets are applied individually to the seal element by pressure from a pneumatic hose within the hollow profile frame which applies pressure to the tappets.Type: GrantFiled: November 6, 1990Date of Patent: September 29, 1992Assignee: Ruhrkohle AGInventors: Klaus Wessiepe, Wilhelm Stewen
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Patent number: 5137602Abstract: The heating flues in an oven are equipped with refractory components to control the feed and mixture of combustion air and gas into each heating flue. In one embodiment, the refractory component forms a plurality of passageways through which air and gas flow into mixture. Initially, the gas is mixed with small amounts of air to obtain substoichiometric combustion in the refractory component. Additional combustion air is supplied to the resulting partially combusted gases and unburned gas to complete the combustion of air and gas in the heating flue. This arrangement serves to optimize the flame control and the heat discharge over the height of the heating flue. In a second embodiment, the refractory component forms a plurality of passageways through which combustion air is supplied to the gas along the passageway outlets which are located at preselected positions along the length of the heating flue.Type: GrantFiled: January 23, 1991Date of Patent: August 11, 1992Assignee: Dr. C. Otto Feuerfest GmbHInventors: Wilhelm Stewen, Klaus Wessiepe
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Patent number: 5076019Abstract: The door has a separate seal element and a hollow profile frame. The hollow profile frame has a number of tappets extending therefrom to press the seal element against a door frame. These tappets are applied individually to the seal element by pressure from a pneumatic hose within the hollow profile frame which applies pressure to the tappets.Type: GrantFiled: November 6, 1990Date of Patent: December 31, 1991Assignee: Ruhrkohle AGInventors: Klaus Wessiepe, Wilhelm Stewen
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Patent number: 4986032Abstract: The door has a separate seal element and a hollow profile frame. The hollow profile frame has a number of tappets extending therefrom to press the seal element against a door frame. These tappets are applied individually to the seal element by pressure from a pneumatic hose within the hollow profile frame which applies pressure to the tappets.Type: GrantFiled: April 10, 1990Date of Patent: January 22, 1991Assignee: Ruhrkohle AGInventors: Klaus Wessiepe, Wilhelm Stewen
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Patent number: 4614567Abstract: Method and apparatus for detection and selective after-quenching of red hot pockets in previously quenched hot coke lying on a coke bench, in which the temperature of the coke is sensed and recorded over the entire surface or area of the coke bench by temperature sensors installed thereabove, and if excessively hot coke portions or local areas are found, only those excessively hot coke portions are acted upon for after-quenching automatically in controlled manner with a focused water jet or spray using only a minimum amount of water for as short a time as possible.Type: GrantFiled: June 12, 1985Date of Patent: September 30, 1986Assignee: Firma Carl Still GmbH & Co. KGInventors: Dieter Stahlherm, Reimer Haack, Wilhelm Stewen, Helmut Lukaszewicz
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Patent number: 4580908Abstract: Optical quotient thermometers are disposed on the operative end of pusher rods used to push coke from coke oven chambers. The actual value of the optical quotient temperature is measured by the thermometer on two closely-adjacent wavelengths and a quotient signal is produced from the top measured volumes which is converted in a measuring head secured to the pusher rod. An electrical signal is delivered by a converter in the measuring head by wires extending along the pusher rod to a point externally of the oven chamber to a recording and/or evaluating facility where the signal is recorded.Type: GrantFiled: August 8, 1983Date of Patent: April 8, 1986Assignee: Dr. C. Otto & Comp. GmbHInventor: Wilhelm Stewen
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Patent number: 4502922Abstract: Coke oven chamber doors form heat-resistant plugs having a construction to prevent damage when the plugs are removed and replaced. Each plug consists of an external door-body plate and internal steel plates. The ends of the internal plates overlap each other for relative movement. The lowermost plate is secured at its lower end and the uppermost plate is secured at its upper end. This provides a specific longitudinal dimension of the overlapping plates.Type: GrantFiled: September 15, 1983Date of Patent: March 5, 1985Inventors: Wilhelm Stewen, Peter Pape
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Patent number: 4481011Abstract: In a method of preparing coal in particulate form for charging coke ovens, the particulate coal is initially treated with a binding agent selected from carbo-pitch, residues of coal oil refining and oil refining residues; particulate coal so treated is mixed with 0.1 to 0.3% of light oil and subsequently agglomerated before feeding into coke ovens. Non-self-fluxing coal may be treated by this method and mixed with granulate self-fluxing coal to form a coke oven charge.Type: GrantFiled: September 30, 1982Date of Patent: November 6, 1984Assignee: Ruhrkohle AktiengesellscaftInventors: Wilhelm Weskamp, Wilhelm Stewen
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Patent number: 4421604Abstract: The quality of coke is improved by measuring the width of a plastic zone of a given type of coal, comparing said measured zone with a predetermined zone width known to result in good quality coke, adjusting certain characteristics of said given coal prior to charging it into the coke oven to cause a change in said zone width of the coal that will ultimately result in improved coke quality. Typical adjusting steps include preheating the coal and/or the addition of coal binders, such as, various carbon and petro-based binding agents, for example, pitch.Type: GrantFiled: October 23, 1981Date of Patent: December 20, 1983Assignee: Ruhrkohle AktiengesellschaftInventors: Wilhelm Weskamp, Gerd Nashan, Wilhelm Stewen
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Patent number: 4385962Abstract: Production of coke from coal is improved by mixing self-feeding coal with compacted non self-feeding coal prior to carrying out the coking process. Preferably, there is about 10% to about 60% by weight of the non self-feeding coal based on the total charge. Binders may be used and it is preferred that the non self-feeding coal be preheated to approximately 150.degree. C. to 250.degree. C. prior to mixing. In the event that an aqueous emulsion is used as the binder, the preheating step may be omitted. Coke of superior abrasion resistance is obtained by the foregoing method.Type: GrantFiled: June 16, 1981Date of Patent: May 31, 1983Assignee: Ruhrkohle AktiengesellschaftInventors: Wilhelm Stewen, Wilhelm Weskamp