Patents by Inventor Wolfgang Lehmann
Wolfgang Lehmann 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: 5014368Abstract: The invention is directed to a method and apparatus for monitoring liquids ischarged intermittently from a discharge receptacle having a siphon. The liquids originate in a facility in which personnel work with open radioactive substances. Measurements are made of the radioactive charge of discharged liquids in the region of the siphon of each discharge receptacle to prevent contamination of the discharge path into the drainage system. If a radioactive limit value of radiation is detected which is above a specific threshold, discharge of the liquid into the drainage network is prevented. The discharge receptacles are then emptied individually and upwardly.Type: GrantFiled: September 8, 1989Date of Patent: May 14, 1991Assignee: Deutsche Gesellschaft fur Wiederaufarbeitung von Kernbrennstoffen mbHInventor: Wolfgang Lehmann
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Patent number: 4861462Abstract: A screen unit for a screening machine comprises a screen layer which is bonded to a screen frame spanning an opening thereof. The screen layer is uniformly heated before such bonding is effected so that cooling after bonding generates a tension in the screen layer to allow it to have a trampoline or drumhead vibratile action. The tension is maintained by a reinforcing frame embedded in the frame body.Type: GrantFiled: September 11, 1987Date of Patent: August 29, 1989Assignee: Hein, Lehmann AGInventors: Wolfgang Lehmann, Christian Neukam
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Patent number: 4825981Abstract: An axially split brake disk that includes two brake bands that form a brake ring and are interconnected by ribs. The brake disk further includes two brake ring halves that are separated by concentric and radially extending seams of division, in each of which one of the brake ring halves is provided with a projection that extends in a concentric direction, while the other brake ring half is provided with a corresponding U-shaped recess that accommodates the projection. The width of the projection is less than the width of the brake ring, as measured in a radial direction. The projection of the one brake ring half, as well as that portion of the other brake ring half in which the recess is provided, are provided with corresponding radially extending bores for receiving a holding mechanism, such as a sleeve-like or rod-like member, that is provided with pin-like elements for preventing the holding mechanism from shifting in a radial direction relative to the brake ring halves.Type: GrantFiled: January 15, 1988Date of Patent: May 2, 1989Assignee: Bergische Stahl-IndustrieInventors: Alfred W. Otto, Wolfgang Lehmann, Henryk Piontke
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Patent number: 4670136Abstract: The invention relates to a screen surfacing with exchangeable screen elements fastened juxtaposed, which are fastened on a load-bearing substructure. A plastic profile (2) which engages under the edges of at least two mutually adjacent screen elements (14, 15) is fastened on the load-bearing substructure (1) in the region in which two adjacent screen elements (14, 15) adjoin mutually. A second, upper profile (8) is fastened detachably over this plastic profile (2), and a screen element (14, 15) is retained and clamped between the first and second profile on each of two sides.Type: GrantFiled: August 23, 1985Date of Patent: June 2, 1987Assignee: Isenmann, Drahterzeugnisse GmbHInventors: Gerhard Schmidt, Wolfgang Lehmann
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Patent number: 4576420Abstract: A linear bearing arrangement for guiding a carriage in a straight line along a guide rail is provided with at least one endless course of balls (3) disposed between the carriage (2) and the guide rail (1). The guide rail has at least one ball race (4) associated with the load-bearing balls of the ball course and extending in the longitudinal direction of the rail. At least one elongated track carrier element (8), having at least one ball race (16), as well as at least one diversion and return track for the unloaded balls are disposed in the interior of the carriage.In order to assure great accuracy in the guidance of the carriage on the guide rail as well as to assure simple assembly and convenient replacement of worn parts, the arrangement is selected such that the track carrier element (8) is combined into one subassembly with diversion (9) and return elements (10,10a,11,11a) containing the diversion and return track; a plate (12) holds the balls (3) facing the rail (11) captive.Type: GrantFiled: March 28, 1984Date of Patent: March 18, 1986Assignee: Neff Gewindespindeln GmbHInventors: Wolfgang Lehmann, Hans-Walter Aab
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Patent number: 4552416Abstract: A bearing arrangement for guiding a carriage in a straight line along a guide rail has four endless courses of balls disposed between the guide rail and the carriage, and the guide rail is provided with four parallel ball races associated with the load-bearing balls of the ball courses. The balls are held in elongated ball bearing assemblies. The ball races are located in the respective transitional zones between two adjacent shanks, located one above the other, of the substantially double-T-shaped or cruciform guide rail.In order to increase the flexural strength of the guide rail and to provide a manner of securing it in a tilt-free manner, the arrangment is selected such that on at least one side the guide rail has two integral, longitudinal parallel ribs, which define a longitudinal groove in which securing devices for the guide rail and/or for elements insertable into the longitudinal groove are disposed, fitting seats between the ball bearing assemblies and the carriage insure accurate guidance.Type: GrantFiled: March 28, 1984Date of Patent: November 12, 1985Assignee: Neff Gewindespindeln GmbHInventors: Wolfgang Lehmann, Hans-Walter Aab
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Patent number: 4473466Abstract: A flat sieve, or a part thereof, has a flat body of elastic material with a rectangular (or square) frame spanned by a plate of lesser depth with a multiplicity of throughgoing parallel slots and intervening rows of shorter slots interrupted by solid transverse webs which are integral with crossbars intersecting only the lower portions of the longer, throughgoing slots. The length of the shorter slots may be about one-tenth that of the longer slots.Type: GrantFiled: March 2, 1983Date of Patent: September 25, 1984Assignee: Isenmann Drahterzeugnisse GmbHInventors: Gerhard Schmidt, Wolfgang Lehmann
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Patent number: 4384110Abstract: Non-crosslinking, water-soluble polyamines which can be obtained by reacting(A) basic polyureas which have been prepared by condensation of ureas with polyamines containing at least three amino groups, of which at least one is a tertiary amino group, or with mixtures of these polyamines with aliphatic, araliphatic, cycloaliphatic or heterocyclic polyamines containing two primary or two secondary amino groups or one primary or one secondary amino group, and optionally with .omega.-aminocarboxylic acids containing at least three carbon atoms, or lactams thereof,(B) polyalkylenepolyamines of the general formula ##STR1## in which R denotes H or CH.sub.Type: GrantFiled: March 15, 1982Date of Patent: May 17, 1983Assignee: Bayer AktiengesellschaftInventors: Wilfried Lobach, Gunter Kolb, Wolfgang Lehmann, Gunther Cramm, Friedhelm Muller, Janos Muszik
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Patent number: 4348514Abstract: Non-crosslinking, water-soluble polyamines which can be obtained by reacting(A) basic polyureas which have been prepared by condensation of ureas with polyamines containing at least three amino groups, of which at least one is a tertiary amino group, or with mixtures of these polyamines with aliphatic, araliphatic, cycloaliphatic or heterocyclic polyamines containing two primary or two secondary amino groups or one primary or one secondary amino group, and optionally with .omega.-aminocarboxylic acids containing at least three carbon atoms, or lactams thereof,(B) polyalkylenepolyamines of the general formula ##STR1## in which R denotes H or CH.sub.Type: GrantFiled: June 5, 1980Date of Patent: September 7, 1982Assignee: Bayer AktiengesellschaftInventors: Wilfried Lobach, Gunter Kolb, Wolfgang Lehmann, Gunther Cramm, Friedhelm Muller, Janos Muszik
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Patent number: 4319019Abstract: Water-soluble polyamines which are obtainable by reacting(A) one or more water-soluble or water-dispersible basic polyamides which have been prepared by condensation of aliphatic polyamines containing at least two primary amino groups and at least one secondary or tertiary amino group, or of mixtures of these polyamines and of aliphatic, cycloaliphatic, araliphatic or heterocyclic polyamines containing two primary or two secondary amino groups or one primary and one secondary amino group, with saturated aliphatic dicarboxylic acids containing 4-10 carbon atoms, or with functional derivatives thereof and optionally with .omega.-aminocarboxylic acids containing at least 3 carbon atoms, or lactams thereof,(B) one or more polyalkylenepolyamines of the general formula ##STR1## in which R denotes H or CH.sub.Type: GrantFiled: July 14, 1980Date of Patent: March 9, 1982Assignee: Bayer AktiengesellschaftInventors: Wolfgang Lehmann, Friedhelm Muller, Gunther Cramn, Knut Hammerstrom, Wilfried Lobach
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Patent number: 4315816Abstract: An arcuate shaped magnetic system is housed in a fixed cryostat within a rotating drum. A slurry containing magnetizable particles is charged into an operating area defined by the magnetic system at the lower part of the drum and magnetic particles adhering to the drum are removed as the drum rotates the same to a discharge location. The cryostat has an outer wall which conforms to the shape of the drum and houses a sector-shaped refrigeration tank. The refrigeration tank has an arcuate wall section conforming to the shapes of the cryostat wall and the drum and is positioned in close proximity to the outer cryostat wall only in the operating area in order to minimize inward heat transfer.Type: GrantFiled: October 19, 1977Date of Patent: February 16, 1982Assignee: Klockner-Humboldt-Deutz AGInventors: Guenter Ries, Klaus-Peter Juengst, Siegfried Foerster, Franz Graf, Wolfgang Lehmann, Karl-Heinz Unkelbach, Gottfried Dueren
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Patent number: 4272365Abstract: A magnetic separator, in particular a drum separator, includes a magnetic system having a plurality of magnets. Each of the magnets produces an open field directed toward a separation zone which, in a drum separator, extends axially of the drum outside of the surface of the drum. The magnets may include conductive coils, preferably superconducting coils, which are traversed in the same direction by current and which include an iron-free core. The average center-to-center spacing of the coils is a maximum of 25 times the spacing between the coils and the separating zone and is preferably in the range of 15:1 to 10:1. The coils are elliptical and have major and minor axes which decrease from the outermost coil winding to the innermost coil winding, with the distances between the windings being greater along the major axes than along the minor axes.This is a continuation of application Ser. No. 843,737, filed Oct. 19, 1977, now abandoned.Type: GrantFiled: February 5, 1979Date of Patent: June 9, 1981Assignee: Klockner-Humboldt-Deutz AGInventors: Guenter Ries, Klaus-Peter Juengst, Siegfried Foerster, Franz Graf, Wolfgang Lehmann, Karl-Heinz Unkelbach, Gottfried Duren
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Patent number: 4254255Abstract: Water-soluble condensation products which are not self-crosslinking and are prepared from polyacidic amines and compounds which are polyfunctional towards amino groups, in an aqueous medium at temperatures from 0.degree. to 120.degree. C. and pH values above 6 in the presence of emulsifiers are used in the production of paper.Type: GrantFiled: January 19, 1979Date of Patent: March 3, 1981Assignee: Bayer AktiengesellschaftInventors: Wilfried Lobach, Wolfgang Lehmann, Friedhelm Muller
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Patent number: 4250298Abstract: Water-soluble amines which are not self-crosslinking and are obtainable by reacting(A) one or more water-soluble or water-dispersable amines containing amide groups, prepared by condensation of (a) 1 mol of dicarboxylic acid or functional derivatives thereof, (b) 0 to 30 mols of aminocarboxylic acids containing at least three C atoms, or lactams thereof, and (c) 1.4 to 30 mols of polyalkylenepolyamines of the general formula ##STR1## in which R denotes H or CH.sub.3,y is in each case the same or different and denotes the number 0 or 1 andx denotes a number from 4 to 15,and(B) compounds which are polyfunctional towards amino groups, are suitable as agents for increasing the retention of fibres, fillers and pigments, for accelerating drainage during the production of paper and for working up effluents from paper machines.Type: GrantFiled: December 15, 1978Date of Patent: February 10, 1981Assignee: Bayer AktiengesellschaftInventors: Wolfgang Lehmann, Friedhelm Muller, Wilfried Lobach, Gunther Cramm, Knut Hammerstrom
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Patent number: 4250112Abstract: Water-soluble polyalkylenepolyamines which are not self-crosslinking and contain quaternary dialkylammonium groups, and which are obtained by reaction of polyalkylenepolyamines of the general formula ##STR1## in which R denotes hydrogen or methyl,y denotes the number 0 or 1 and the y's may be identical or different andx denotes a number from 2 to 15,with bifunctional compounds of the general formula ##STR2## in which z denotes a number from 1 to 6 andR.sub.1 and R.sub.2 denote lower alkyl or lower hydroxyalkyl, are suitable for use as auxiliaries in the manufacture of paper.Type: GrantFiled: May 8, 1979Date of Patent: February 10, 1981Assignee: Bayer AktiengesellschaftInventors: Wilfried Lobach, Wolfgang Lehmann, Friedhelm Muller
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Patent number: 4250299Abstract: Water-soluble polyamines which are obtainable by reacting(A) one or more water-soluble or water-dispersible basic polyamides which have been prepared by condensation of aliphatic polyamines containing at least two primary amino groups and at least one secondary or tertiary amino group, or of mixtures of these polyamines and of aliphatic, cycloaliphatic, araliphatic or heterocyclic polyamines containing two primary or two secondary amino groups or one primary and one secondary amino group, with saturated aliphatic dicarboxylic acids containing 4-10 carbon atoms, or with functional derivatives thereof and optionally with .omega.-aminocarboxylic acids containing at least 3 carbon atoms, or lactams thereof,(B) one or more polyalkylenepolyamines of the general formula ##STR1## in which R denotes H or CH.sub.Type: GrantFiled: December 15, 1978Date of Patent: February 10, 1981Assignee: Bayer AktiengesellschaftInventors: Wolfgang Lehmann, Friedhelm Muller, Gunther Cramm, Knut Hammerstrom, Wilfried Lobach
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Patent number: 4166002Abstract: Water-soluble polyamines which (a) have an average molecular weight of above 1,000, (b) contain at least one grouping of the formula-- R -- Zin whichZ denotes a --COOH or --SO.sub.Type: GrantFiled: November 29, 1974Date of Patent: August 28, 1979Assignee: Bayer AktiengesellschaftInventors: Wolfgang Lehmann, Gerhard Troemel, Kurt Ley, Friedhelm Muller
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Patent number: 3932363Abstract: Water-soluble polyamines which (a) have an average molecular weight of above 1,000 (b) contain at least one grouping of the formula--R--Zin whichZ denotes a --COOH or --SO.sub.Type: GrantFiled: November 10, 1972Date of Patent: January 13, 1976Assignee: Bayer AktiengesellschaftInventors: Wolfgang Lehmann, Gerhard Troemel, Kurt Ley, Friedhelm Muller