Patents Assigned to Escher Wyss Limited
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Patent number: 4970767Abstract: A heatable controlled deflection roll contains hydrostatic support elements, each of which is supported in a pressure chamber and displaceable in a predetermined support or pressing direction. Heating of the rotatable roll shell or jacket of the controlled deflection roll is accomplished by infeeding a heated hydraulic heat carrier medium to bearing pockets of the hydrostatic support elements. This infeed of the heated hydraulic heat carrier medium is effected operationally separate from the provision of the pressure chamber with hydraulic pressurized fluid medium colder than the heated hydraulic heat carrier medium. The infeed of the hydraulic heat carrier medium and the infeed of the hydraulic pressurized fluid medium are thus accomplished via separate lines without thermal stressing of associated regulating valves and pumps and without a viscosity reduction of the hydraulic pressurized fluid medium, such viscosity reduction resulting in a loss of hydraulic pressurized fluid medium.Type: GrantFiled: May 1, 1989Date of Patent: November 20, 1990Assignee: Sulzer-Escher Wyss LimitedInventor: Christoph Link
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Patent number: 4681029Abstract: During processing the soybeans are heated-up in a first of two successively arranged fluidized beds with a rapidity such that the hulls loosen or detach from the seeds and there is obtained a honogeneous heating of all of the soybeans. The heated-up soybeans may be directly conveyed into the second fludized bed where they are maintained in a heated condition and from which location they are infed in a heated state to a breaking or cracking mill where they are crushed or cracked and then to a flaking device for the subsequent flaking thereof. It is also possible to undertake along the conveying path from the first fluidized bed to the second fluidized bed a mechanical dehulling operation at the soybeans where the hulls are separated from the seeds and the seed portions are delivered into the second fluidized bed.Type: GrantFiled: October 28, 1985Date of Patent: July 21, 1987Assignee: Sulzer-Escher Wyss LimitedInventors: Helmut Bartesch, Gerd Florin
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Patent number: 4611479Abstract: In rolling metal foils, such as aluminum foils, especially very thin foils in the range down to 10 .mu.m, an improved uniformity of the foil thickness over the width of the foil sheet and, simultaneously, greater rolling speeds of the foil sheet are obtained by operating the rolling apparatus at a working point of the rolling force/material-working or line force/deformation characteristic curve which lies below the saturation region in which, while the material-working or deformation is nearly independent of the rolling or line force, the rolling or pulling speed is determined by other parameters and can not be varied. The thickness variations occurring under this selection of the working point and due to variations in the rolling or line force over the width of the rolls are compensated by regulating the rolling or line force such that the thickness reduction is constant over the width of the sheet or has a desired profile of variation.Type: GrantFiled: November 26, 1984Date of Patent: September 16, 1986Assignee: Sulzer-Escher Wyss LimitedInventor: Heinz Guttinger
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Patent number: 4556573Abstract: A method for the recovery of soybean oil of soybean meal from soybeans wherein the soybeans are processed by breaking so that they are flaked prior to extraction. During processing the soybeans are heated-up in a first of two successively arranged fluidized beds with a rapidity such that the hulls or shells detach from the seeds or kernels and there is obtained a homogeneous heating of all of the soybeans. The heated-up soybeans are either directly conveyed into the second fluidized bed where they are maintained in a heated condition and from which location they are infed in a heated state to a breaking or crushing mill where they are crushed and then to a flaking device for the subsequent flaking thereof. It is also possible to undertake along the conveying path from the first fluidized bed to the second fluidized bed a mechanical hulling operation at the soybeans where the hulls are separated from the seeds and the seed portions or kernels are delivered into the second fluidized bed.Type: GrantFiled: October 19, 1981Date of Patent: December 3, 1985Assignee: Escher Wyss LimitedInventors: Helmut Bartesch, Gerd Florin
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Patent number: 4543162Abstract: The multi-ply headbox has a number of, for example, three headbox elements comprising block-like infeed members containing mutually parallel distributor passages for the fiber stock suspension which open each into a nozzle chamber. Plate-like intermediate lip members or lips bound the nozzle chambers and are provided between the headbox elements. The plate-like intermediate lips are displaceably arranged between the infeed members. There are also provided outer lips or lip members which either can be structured as displaceable plates or may be constructed to be pivotable. One of the outlet slices can be altered without affecting the size of the other slices.Type: GrantFiled: July 11, 1983Date of Patent: September 24, 1985Assignee: Escher Wyss LimitedInventor: Otto Hildebrand
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Patent number: 4530227Abstract: In a hydrostatic support member a piston which is axially movable in a pressurized fluid medium-supplied cylinder carries at the end thereof which is remote from the cylinder at least two bearing shoes which are axially movable independently of each other and which can be inclined relative to each other. There is achieved an automatic adaptation of the bearing or running surface of the support member to a counter surface changing in distance, shape and curvature even throughout a wide tolerance range. Such a support member is particularly suited for supporting the working rolls in a rolling mill, the diameter of which decreases during the operating or service life thereof, or for the support of back-up or supporting rolls backing-up the working rolls.Type: GrantFiled: July 18, 1983Date of Patent: July 23, 1985Assignee: Sulzer-Escher Wyss LimitedInventors: Beat Schlatter, Eugen Schnyder
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Patent number: 4480452Abstract: In a rolling mill containing two work rolls and, as desired, supporting or back-up rolls, a rapid adjustment of the roll gap or nip with elimination of effects due to elastic elongation of the roll framework or stand is achieved in that when structuring at least one of the rolls as a controlled deflection roll containing a stationary roll support and a rotatable roll shell rotating thereabout, there is measured the position of the inner side or surface of the roll shell and an automatic control serves to adjust or readjust the roll gap or nip by causing changes in the pressure exerted upon the hydrostatic supporting or pressure elements placed intermediate the stationary roll support and the rotatable roll shell.Type: GrantFiled: March 21, 1983Date of Patent: November 6, 1984Assignee: Sulzer-Escher Wyss LimitedInventor: Eugen Schnyder
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Patent number: 4464580Abstract: In a turbo-machine having a rotor member movable relative to a stationary housing member there is provided a substantially ring-shaped or annular seal between both of these members and serves to seal pressurized water from an external space or region. One of both of these members possesses a sealing surface against which there is pressed a sealing body of the seal which is inserted into the other member, the sealing body being for instance constituted by a lip seal. Improved lubrication, reduced friction and enhanced service life of the seal is attained in that, the sealing surface has fed thereto a friction-reducing liquid, for instance by means of radial grooves provided in the sealing surface or by means of bores opening into the sealing surface.Type: GrantFiled: March 17, 1982Date of Patent: August 7, 1984Assignee: Escher Wyss LimitedInventors: Helmut Miller, Kurt Baumann, Franz Halder, Noel Meystre
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Patent number: 4443727Abstract: The rotor forms part of a tubular turbine with a ring-shaped electrical machine. The rim of the rotor is deformed by the centrifugal forces, with large dimensions involved. Those portions of the rim which are to be circular at operating speed are, in the state of rest, produced to deviate from the circular by the amounts of deviation occurring in the rotating state relatively to the state of rest.Type: GrantFiled: June 2, 1982Date of Patent: April 17, 1984Assignee: Escher Wyss LimitedInventors: Heinz Annen, Friedrich Schneebeli, Helmut Pirchl
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Patent number: 4430221Abstract: In a centrifuge sieve drum wherein the inner surface of the drum is lined with a support arrangement which carries wear-resistant sieve or screen rods formed of a hard material, there is obtained a compensation of the different thermal expansions of the sieve or screen rods and the support arrangement in that, the sieve or screen rods are fixedly connected, in each case, as by riveting or by a threaded connection, at one location with the support arrangement of the sieve drum, whereas the rivets or threaded screws at other connection locations are moveable in a slot-shaped or elongate hole in the axial direction of the sieve drum.Type: GrantFiled: July 6, 1982Date of Patent: February 7, 1984Assignee: Escher Wyss LimitedInventor: Leonhard Spiewok
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Patent number: 4430159Abstract: A twin-wire papermaking machine contains a region having two wires guided in mutual contact with one another and at which there is located at least one stock infeed device. The stock infeed device possesses the form of a box or cabinet member having an open side along which move both of the wires. Within the stock infeed device there is located a fibrous stock suspension suitable for the fabrication of paper and which is at an excess pressure in relation to the atmosphere. At the side of the wires facing away from the stock infeed device there can be arranged a suction device.Type: GrantFiled: April 9, 1982Date of Patent: February 7, 1984Assignee: Escher Wyss LimitedInventors: Alfred Bubik, Siegfried Reutter
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Patent number: 4427552Abstract: In the method of automatically controlling a continuously operating pressure filter, into which a suspension to be separated is introduced and from which a separated filtrate and a formed product, i.e. a concentrated suspension, are removed, a tolerated constant operating pressure is maintained in a filtering chamber of the pressure filter. During operation the transmission or throughput capacity of the filtering walls in the filtering chamber gradually decreases with increasing operating time of the pressure filter. To maintain, during operation, a constant ratio of the proportions of dry solid and liquid in the product the flow of suspension and the flow of product are regulated during operation in accordance with the result of measuring the transmission or throughput capacity of the filtering walls. Each time when a decrease is detected each of the two flows is reduced by the same coefficient which is directly proportional to the respectively detected decrease in the transmission capacity.Type: GrantFiled: January 27, 1983Date of Patent: January 24, 1984Assignee: Sulzer-Escher Wyss LimitedInventors: Jurg Lieberherr, Ernst Rebsamen, Felix Trachsel, Ludwig Huser
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Patent number: 4422318Abstract: A roller is shown having an apparatus for cooling or heating the roller surface. The apparatus has essentially one or more chambers which are open relative to the roller surface. The chambers have a substantially square internal cross section. A fluid is fed in through the inlet ducts. During operation of the roller turbulence is formed in the chambers. The turbulence results in a longer retention time for the fluid in the chambers thus producing a greater cooling or heating effect for the amount of fluid fed in.Type: GrantFiled: January 19, 1981Date of Patent: December 27, 1983Assignee: Escher Wyss LimitedInventors: Alfred Christ, Rolf Lehmann, Beat Schlatter
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Patent number: 4421990Abstract: A tidal power plant and method of operating the same are disclosed. In tidal power plants the turbines are arranged in channels between the sea and a storage reservoir. Heretofore known constructions of tidal power plants included relatively complex mechanisms for maintaining the turbine or turbines operating for the maximum amount of time, but generally they have failed to exceed a high overall operating efficiency. The present invention seeks to improve upon prior installations by designing a tidal power plant in which the or each turbine is disposed in a main channel between the sea and the storage reservoir. A connection channel is arranged above the main channel containing the turbine. A shutoff device is located at the reservoir side of the turbine and the connection channel to control and direct the flow of water.Type: GrantFiled: August 30, 1982Date of Patent: December 20, 1983Assignee: Escher Wyss LimitedInventors: Valentin Heuss, Helmut Miller
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Patent number: 4414889Abstract: A rolling device is shown, having two press rollers of which at least one is a deflection equalizing roller. The equalizing roller has a support, support elements and a roller shell rotating around the support which is displaceable relatively to the support in a plane containing the axes of the rolls.In order to reduce the deflection of the supports under the stress produced during use by the support elements the supports are secured in the side panels and without clearance, stiffened against bending.Therefore, the supports and both the side panels form together a force locked construction being firm against bending.Type: GrantFiled: June 23, 1981Date of Patent: November 15, 1983Assignee: Escher Wyss LimitedInventor: Heinz Guttinger
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Patent number: 4413669Abstract: In a method of heat extraction from an aqueous carrier medium through its expansion, the expansion is undertaken step by step in a number of expansion stages arranged consecutively as regards the flow of the medium. The vapor produced in each expansion stage is removed from the stage, and the individual vapors are subjected, respectively, parallel to each other, to a thermal utilization or revalorization.According to one embodiment, the carrier medium is boiler feed water, which is circulated via a heat absorption zone and through the expansion stages. The vapor produced undergoes thermo-compression and is fed to a common steam bar. The heat absorption zone, heat exchangers are heated by a source of waste energy. A produce of this method is a pure water vapor.Type: GrantFiled: April 30, 1981Date of Patent: November 8, 1983Assignee: Escher Wyss LimitedInventor: Harald Hantelmann
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Patent number: 4404724Abstract: A hydrostatic support or pressure element, especially for a controlled deflection roll, comprising a sealing or closing ledge having a sealing surface which closes a gap between a plunger of the support element and the supported part in a manner such that mixed friction prevails at the sealing surface of the sealing ledge. The sealing surface has a width which at most amounts to ten or five millimeters, respectively. The hydraulically effective surface of the plunger, producing a contact or press force for the sealing surface, is equal to a surface whose boundary line extends within the sealing surface, and specifically, preferably at a distance of 0.2 to 0.5-fold of the width of the sealing surface from the inner edge of the sealing surface.Type: GrantFiled: March 9, 1981Date of Patent: September 20, 1983Assignee: Escher Wyss LimitedInventors: Alfred Christ, Johann Miesch
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Patent number: 4381588Abstract: A controlled deflection roll contains a stationary roll support and a roll shell which is rotatable about the stationary roll support. The roll shell consists of two parts or elements which are coaxially interconnected by friction, and specifically, an inner base body and an outer sleeve. The outer surface of the base body and the inner surface of the sleeve can contain substantially cylindrical stepped surfaces facilitating the mounting or insertion of the sleeve upon the base body and the withdrawal of the sleeve from the base body with the aid of a pressurized fluid medium.Type: GrantFiled: January 19, 1981Date of Patent: May 3, 1983Assignee: Escher Wyss LimitedInventor: Mario Biondetti
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Patent number: 4373238Abstract: In a support element with a flexible or inclinable head portion which faces a surface which is to be supported, the head portion is able to adapt to any changes in shape or position in order to maintain a parallel gap between the surface and the head portion. In order to support the head portion towards the surface which is to be supported, at least one pressure chamber is provided which can be acted upon by a pressure medium so that the force produced by this action of pressure medium acts on the head portion in the direction stated. A measuring device is provided, for measuring the size of the gap between the head portion and the surface to be supported. The pressure in the pressure chamber is regulated as a function of the measured size of the gap.Type: GrantFiled: February 23, 1981Date of Patent: February 15, 1983Assignee: Escher Wyss LimitedInventor: Heinz Guttinger
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Patent number: 4371115Abstract: Ring gap nozzle for distributing a fluid medium over a plate, comprising an axial channel passing through the plate, a cap which covers the channel, leaving a ring gap between it and the plate, and a connecting member extending coaxially through the channel for holding the cap in place. A wall which defines a rotationally symmetrical flow space extends from the connecting member to the outlet edge of the totally free ring gap. The annular flow space comprises a region of the channel, of a deflection space and of the ring gap. All the walls which bound it are arranged so that, starting at least in the deflection space, the flooded area of cross section of the annular flow space decreases continuously in the direction of the flow of medium towards the outlet edge of the ring gap.Type: GrantFiled: February 22, 1979Date of Patent: February 1, 1983Assignee: Escher Wyss LimitedInventors: Franz Sedlacek, Jakob Oertle, Dietrich Cebulla