Patents by Inventor Gerhard Tunker
Gerhard Tunker 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: 5939343Abstract: This invention provides a new lead-free glass composition, a glass frit of this composition, a process for its production and also coloring preparations containing such a glass frit and the use thereof. The glass composition according to the invention contains in mol-%K.sub.2 O 10-17B.sub.2 O.sub.3 10-25TiO.sub.2 15-30SiO.sub.2 35-55Al.sub.2 O.sub.3 0-5Bi.sub.2 O.sub.3 0-5S 0-3 and any oxide from the group consisting of PbO, CdO, ZnO, Li.sub.2 O, Na.sub.2 O, MgO, CaO, SrO, BaO and P.sub.2 O.sub.3 which is present being present in a quality of less than 0.5 wt-% in each case. Glass frits of this composition are very suitable for use in coloring preparations for the production of glass enamels, in particular for panes of glass for automobiles. Glass frits according to the invention can be stoved at low temperatures, exhibit good anti-sticking properties, a high resistance to acids and a diminished migration of silver.Type: GrantFiled: March 6, 1997Date of Patent: August 17, 1999Assignee: Cerdec Aktiengesellschaft Keramische FarbenInventors: Gerhard Tunker, Hildegard Paulus
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Patent number: 5845897Abstract: A toggle lever clamp device for automobile body fabrication comprises a clamp housing (1) having a rectangularly shaped cross section wherein the cross-section is taken at a right angle to an axial direction of the housing. The housing is comprised of two parts (12, 13) and has a slot (19) on a rear side thereof that extends in the axial direction. The toggle lever clamp device further includes a cylinder (2) coupled to an end of the housing in the axial direction, a piston (6) axially located in the cylinder so that pressure can be exerted alternately on either side thereof, a piston rod (7) coupled to the piston (6) and extending axially through a part of the cylinder (2) and into a hollow space in the clamp housing (1); and a toggle lever joint arrangement (10) secured to a free end of the piston rod (7). An integral replaceable monitoring cassette (20) forms a cover in the area of a slot (19).Type: GrantFiled: April 17, 1997Date of Patent: December 8, 1998Assignee: Tunkers Maschinenbau GmbHInventor: Josef-Gerhard Tunkers
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Patent number: 5843853Abstract: The invention pertains to a new lead-free glass composition with improved properties, a glass frit of this composition and its use for the production of glass-enamel, particularly for architectural glass. The glass composition contains in mole %:______________________________________ Na.sub.2 O 10-15 K.sub.2 O 0.1-2 SiO.sub.2 40-50 B.sub.2 O.sub.3 8-12 TiO.sub.2 4-7 Al.sub.2 O.sub.3 0.1-3 ZnO 13-17 F 1-5 ______________________________________and less than 0.5 weight % each of the oxides of the series PbO, CdO, P.sub.2 O.sub.5, and alkaline earth metal oxides. Use of a dye preparation containing the glass frit at 600.degree. to 650.degree. C. results in bakeable glazed, crack-free, acid and base resistant enamel layers.Type: GrantFiled: August 4, 1997Date of Patent: December 1, 1998Assignee: Cerdec Aktiengesellschaft Keramische FarbenInventors: Oliver Heitmann, Gerhard Tunker
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Patent number: 5827789Abstract: The invention provides a new lead-free glass composition, a glass frit of this composition, a process for its production and also coloring preparations containing such a glass frit and the use thereof. The glass composition according to the invention contains in mol-%______________________________________ K.sub.2 O 10-17 B.sub.2 O.sub.3 10-25 TiO.sub.2 15-30 SiO.sub.2 35-55 Al.sub.2 O.sub.3 0-5 Bi.sub.2 O.sub.3 0-5 S 0-3 ______________________________________and any oxide from the group consisting of PbO, CdO, ZnO, Li.sub.2 O, Na.sub.2 O, MgO, CaO, SrO, BaO and P.sub.2 O.sub.3 which is present being present in a quantity of less than 0.5 wt-% in each case. Glass frits of this composition are very suitable for use in coloring preparations for the production of glass enamels, in particular for panes of glass for automobiles. Glass frits according to the invention can be stoved at low temperatures, exhibit good anti-sticking properties, a high resistance to acids and a diminished migration of silver.Type: GrantFiled: August 29, 1997Date of Patent: October 27, 1998Assignee: Cerdec Aktiengesellschaft Keramische FarbenInventors: Gerhard Tunker, Hildegard Paulus
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Patent number: 5823519Abstract: A toggle lever clamp for use in devices and welding machines in the motor vehicle industry, has a clamping head consists of two shell-shaped parts that combine to form a housing. This arrangement reduces the number of individual parts to a considerable degree and protects sensitive parts on all sides against dust, dirt, and water spray, as well as welding spatter, while permitting ease of movement of the clamps.Type: GrantFiled: October 21, 1996Date of Patent: October 20, 1998Assignee: Tunkers Maschinenbau GmbHInventor: Josef-Gerhard Tunkers
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Patent number: 5710081Abstract: Using conventional glass frits for the production of black glass coating compositions makes it necessary also to use a relatively large quantity of black pigments. The quantity of pigment used may be reduced by using black glass frits according to the invention, thin layers of which already have a low transmission.The glass frit according to the invention is black and contains in the glass composition (in mol. %): 10-17% of K.sub.2 O, 10-25% of B.sub.2 O.sub.3, 15-30% of TiO.sub.2, 30 to 55% of SiO.sub.2, 0-5% of Al.sub.2 O.sub.3, 0-5% of Bi.sub.2 O.sub.3, 0.05-3% of Fe.sub.2 O.sub.3 (total iron) and 0.1-3% of sulphur (total sulphur).Type: GrantFiled: February 12, 1997Date of Patent: January 20, 1998Assignee: Cerdec Aktiengesellschaft Keramische FarbenInventor: Gerhard Tunker
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Patent number: 5707909Abstract: The invention pertains to a new lead-free glass composition with improved properties, a glass frit of this composition and its use for the production of glass-enamel, particularly for architectural glass.The glass composition contains in mole %:______________________________________ Na.sub.2 O 10-15 K.sub.2 O 0.1-2 SiO.sub.2 40-50 B.sub.2 O.sub.3 8-12 TiO.sub.2 4-7 Al.sub.2 O.sub.3 0.1-3 ZnO 13-17 F 1-5 ______________________________________and less than 0.5 weight % each of the oxides of the series PbO, CdO, P.sub.2 O.sub.5, and alkaline earth metal oxides. Use of a dye preparation containing the glass frit at 600.degree. to 650.degree. C. results in bakeable glazed, crack-free, acid and base resistant enamel layers.Type: GrantFiled: February 21, 1996Date of Patent: January 13, 1998Assignee: Cerdec Aktiengesellschaft Keramische FarbenInventors: Oliver Heitmann, Gerhard Tunker
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Patent number: 5458204Abstract: A vibration pile driver for ramming and/or pulling ram material in which eccentric masses are positively coupled in pairs by flexible draw elements and are adapted to be continuously adjusted and locked in opposite directions.Type: GrantFiled: July 11, 1994Date of Patent: October 17, 1995Assignee: Tunkers Maschinenbau GmbHInventor: Josef-Gerhard Tunkers
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Patent number: 5443669Abstract: In the production of a glass laminate wherein two panes are subjected to deformation with single or double curvature, a screen-printed pattern on at least one of the panes is dried by heating below 300.degree. C. to evaporate the printing oil before the panes are stacked for deformation and simultaneously baking on the dry enamel pattern. The panes are then separated, a plastic sheet interposed and the resulting stack is bonded to form the laminate.Type: GrantFiled: August 17, 1994Date of Patent: August 22, 1995Assignee: Flachglas AktiengesellschaftInventor: Gerhard Tunker
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Patent number: 5075235Abstract: A process is described for direct determination of complex corrosive environmental conditions, which comprises exposing a glass surface to the environment and examing the glass surface before and after exposure using a measurement method based on radiation, in particular a IR-spectroscopic method, in order to determine corrosion effects, in particular water absorption and ion exchange. Glass sensors suitable for use in this process are likewise described.Type: GrantFiled: February 22, 1989Date of Patent: December 24, 1991Assignee: Fraunhofer-Gesellschaft zur Forderung der Angewandten Forschung E.V.Inventors: Dieter Fuchs, Gelmut Patzelt, Gerhard Tunker
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Patent number: 4944964Abstract: A lacquer system which essentially comprises a silicic acid heteropolyconsate, a flake-shaped or lamellar filler, a solvent and, if appropriate a conventional synthetic resin for lacquers is suitable for producing anti-corrosion coatings, especially on glass surfaces.Type: GrantFiled: May 31, 1989Date of Patent: July 31, 1990Assignee: Fraunhofer-Gesellschaft zur Forderung der angewandten Forschung e.V.Inventors: Helmut Schmidt, Helmut Patzelt, Gerhard Tunker, Horst Scholze
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Patent number: 4929493Abstract: A coating which does not reduce the strength of a glass pane and consists of an aluminum phosphate binder in combination with a flake or platelet inorganic pigment is screen-printed on the glass and burned into the latter. The coating can be made conductive by incorporating graphite and/or carbon black therein.Type: GrantFiled: July 21, 1988Date of Patent: May 29, 1990Assignee: Flachglas AktiengesellschaftInventor: Gerhard Tunker
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Patent number: 4913847Abstract: A process for making a fire-retardant composition in which monoaluminumphosphate is reacted with boric acid in a weight ratio 10:1 to 25:1, and to which preferably aluminum oxide in the form of aluminumhydroxide gel is added. The composition is applied between glass panes to form a fire-retardant barrier.Type: GrantFiled: August 31, 1988Date of Patent: April 3, 1990Assignee: Flachglas AktiengesellschaftInventor: Gerhard Tunker
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Patent number: 4840666Abstract: A lacquer system which essentially comprises a silicic acid heteropolyconsate, a flake-shaped or lamellar filler, a solvent and, if appropriate, a conventional synthetic resin for lacquers is suitable for producing anti-corrosion coatings, especially on glass surfaces.Type: GrantFiled: April 18, 1988Date of Patent: June 20, 1989Assignee: Fraunhofer-Gesellschaft zur Forderung der angewandten Forschung e.V.Inventors: Helmut Schmidt, Helmut Patzelt, Gerhard Tunker, Horst Scholze
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Patent number: 4445676Abstract: A fluid-operated clamping device comprises a support forming a cylinder in which a piston is reciprocatable. A piston rod fixed to piston has a free end projecting beyond the cylinder. A bell crank is pivotally mounted on a portion of the support extending beyond the cylinder. A clamping arm is preferably releasably connected to one arm of the bell crank and has a V-shaped end portion extending transverse to the remainder of the clamping arm adapted to clamp a sheet metal or the like between the V-shaped end portion and a matching V-shaped notch on the upper surface of a stationary anvil. A link comprising at least one spring plate partly divided by a preferably T-shaped slot extending from one side thereinto into two resilient end portions is arranged between the free end of the piston rod and the other arm of the bell crank with one end portion pivotally connected to the free end of the piston rod and the other end portion pivotally connected to the other arm of the bell crank.Type: GrantFiled: March 24, 1982Date of Patent: May 1, 1984Assignee: Tuenkers Maschinenbau G.m.b.H.Inventor: Josef-Gerhard Tunkers
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Patent number: 4374696Abstract: A method of heat-sealing substrates, particularly glass to glass or glass to other materials, which comprises using as a heat-sealing medium a silicic acid heteropolycondensate prepared by hydrolysis and polycondensation of at least one organosilane and at least one component selected from the group consisting of silicon-functional silanes, substantially involatile oxides soluble in the reaction medium, or compounds convertible thereto, and organofunctional silanes.The heat-sealing bonds obtained are strong, durable and moisture resistant, the excellent moisture resistance being of special benefit in the heat-sealing of glass substrates.Type: GrantFiled: March 20, 1981Date of Patent: February 22, 1983Assignee: Fraunhofer-GesellschaftInventors: Helmut Schmidt, Gerhard Tunker, Horst Scholze
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Patent number: 4240620Abstract: A gripping arrangement includes a gripping member operatively connected with a differential both-side acted piston movable in a pneumatic or hydraulic cylinder. The piston stroke includes a first step and a second step. The pressure acted upon the piston to move the same into the respective gripping position is partially counteracted at the first step so as to eliminate an undesirably fast movement of the gripping member during at least initial portion of the stroke. The remaining portion of the stroke the piston moves under full pressure exerted by the pressure medium supplied in the cylinder without any counteracting effect.Type: GrantFiled: March 19, 1979Date of Patent: December 23, 1980Assignee: Tuenkers GmbHInventor: Josef-Gerhard Tunkers