Patents Assigned to Firma Carl Freudenberg
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Patent number: 6666459Abstract: A radial shaft seal includes a supporting ring which is attached to at least one sealing ring made of a polymer material. The sealing ring has at least one sealing lip and an additional gasket is arranged on the side of the sealing lip facing away from the space to be sealed. The supporting ring is designed in one piece and has two radial projections arranged next to one another with an axial distance between them, where a circular additional gasket produced separately is arranged without adhesion in the gap formed by this distance and is under axial tension.Type: GrantFiled: April 6, 2000Date of Patent: December 23, 2003Assignee: Firma Carl FreudenbergInventor: Werner Hufnagel
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Patent number: 6663090Abstract: A hydramount, including a supporting bearing and a bearing member, which are supported on each other by a substantially frustoconical, first elastic spring element made of elastomeric material. The hydramount includes a working chamber and a compensating chamber, which are each filled with hydraulic fluid, are separated from each other by a partition, and are in fluid communication via a first damping opening. The supporting bearing is in the form of an internal, first supporting body, which is encircled by an external, second supporting body, at a radial distance. The first and the second supporting bodies are connected by the first elastic spring element and a second elastic spring element. The first elastic spring element and the second elastic spring element define at least two chambers filled with hydraulic fluid.Type: GrantFiled: May 25, 2001Date of Patent: December 16, 2003Assignee: Firma Carl FreudenbergInventors: Arnold Simuttis, Werner Hettler
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Patent number: 6663091Abstract: A hydraulic hearing, including a supporting bearing (1) and a bearing member (2), which are supported against each other by an elastic spring element (3) made of rubber elastic material, and delimit a working chamber (4) and the compensating chamber (5); the working chamber (4) and a compensating chamber (5) each being filled with damping fluid (6) and being in fluid communication with each other; the bearing member (2) essentially being formed in the shape of a pot; the supporting bearing (1) and the elastic spring element (3) essentially being disposed in the interior space (7) defined by the pot-shaped bearing member (2); the bearing member (2) having a two-shell design on its peripheral side, and an outer ring (8) which encloses an inner ring (9) with a radial clearance; the compensating chamber (5) being disposed in the gap formed by the clearance, and being delimited by a boundary wall (11), which extends in the axial direction, can expand in a radial direction, and essentially accommodates an increaseType: GrantFiled: December 18, 2001Date of Patent: December 16, 2003Assignee: Firma Carl FreudenbergInventor: John Philip West
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Patent number: 6655694Abstract: A slide ring seal, including a slide ring and a counter-ring, the slide ring and the counter-ring sealingly contacting each; other so as to be relatively rotatable at their sealing surfaces and so as to be acted upon by spring tension under axial prestressing. The slide ring, via a sealing ring, is sealingly connected to a drive ring in a rotatably fixed manner. The sealing ring is arranged between the slide ring and the drive ring, without adhering. The slide ring, the sealing ring, and the drive ring constitute a preassemblable unit, and the unit on the exterior peripheral side is enclosed by a housing flange under radial prestressing in a rotatably fixed manner.Type: GrantFiled: March 31, 2000Date of Patent: December 2, 2003Assignee: Firma Carl FreudenbergInventor: Kenji Nakano
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Patent number: 6655667Abstract: Hydraulic damper bearing for the attenuation of movement. In one embodiment the hydraulic damper bearing has a first anchoring unit and a second anchoring unit, the second anchoring unit moveable in relation to the first anchoring unit. The hydraulic damper bearing also has a spring component working between the first and the second anchoring units, an operating chamber filled with damping fluid and an equalizing chamber separate from the operating chamber and in fluid communication with the operating chamber via a damping duct which is bordered by a duct wall. The volume of the operating chamber is changed during the relative motion of the first and second anchoring support units. During this relative movement, the damping fluid is moved in the damping duct between the equalizing chamber and the operating chamber. A displacing element is arranged on the first anchoring unit and extends into the operating chamber.Type: GrantFiled: May 26, 2000Date of Patent: December 2, 2003Assignee: Firma Carl FreudenbergInventors: Arno Hamaekers, Hans-Joachim Rudolf
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Patent number: 6656400Abstract: A method for producing a pleated filter material from a nonwoven fabric having spacers for the pleated folds formed from the filter material itself, a formed fabric made of stretched synthetic fibers and thermoplastic and/or thermally cross-linked binding agent being heated in an oven to a temperature lying at least in the softening temperature range and/or the cross-linking temperature range of the binding agent, and subsequently, the formed fabric being formed between profiled calender rolls and cooled simultaneously.Type: GrantFiled: March 28, 2001Date of Patent: December 2, 2003Assignee: Firma Carl FreudenbergInventors: Klaus Veeser, Anthony Hollingsworth, Dirk Dantz
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Patent number: 6647600Abstract: A hook and loop fastener for flat structures, particularly for textile products, having a hook part and an interlocking part, the interlocking part being made of a nonwoven composite having worked-in, textured, polymeric threads, the nonwoven composite being used as support for the textured threads, and the textured threads forming the loops for the hooks.Type: GrantFiled: July 25, 2001Date of Patent: November 18, 2003Assignee: Firma Carl FreudenbergInventors: Manfred Jöst, Dieter Groitzsch, Gerhard Schaut
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Patent number: 6630269Abstract: A fuel cell, comprising a housing, at least one first proton-conducting layer covered by catalyst layers on both sides, gas-permeable electrodes on the catalyst layers and second layers arranged on both sides of the first layers, whereby said second layers take the form of electro-conductive plates that are located in closely adjacent electro-conductive contact with the electrodes, define gas conducting channels in conjunction with the electrodes and one layer touches the other layer by means of a substantially planar surface. The electrodes are made of at least one layer of electro-conductive polymer fibers that is intersected by flow channels running parallel to the surface thereof in at least one direction.Type: GrantFiled: December 29, 2000Date of Patent: October 7, 2003Assignee: Firma Carl FreudenbergInventors: Thomas Barth, Klaus Kaspar, Birgit Severich
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Patent number: 6591856Abstract: A safety valve, such as for a refueling vent line between the tank filler neck and the active charcoal container in a motor vehicle. The safety valve is inserted into the refueling vent line being configured as a float valve. When fuel penetrates into the refueling vent line, and thereby into the safety valve, the outlet of the safety valve is closed by the float. The safety valve is provided with an anti-pollution pipe-end opening onto the environment and closed at normal pressure by a closure operated by a diaphragm. At an elevated pressure in the safety valve, the diaphragm effects an opening of the closure at the anti-pollution pipe-end.Type: GrantFiled: October 31, 2001Date of Patent: July 15, 2003Assignee: Firma Carl FreudenbergInventors: Uwe Meinig, Jörg Bittner
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Patent number: 6584758Abstract: A supporting disk for supporting a rotor, in particular the rotor in open-end spinning rotors, having a hub ring and a supporting ring positioned on the outer circumference of the hub ring, having a bearing surface for the rotor, the outer circumference of the hub ring and the inner circumference of the supporting ring being connected to each other with form locking; the supporting ring (3), in cross-section, being formed from a running part (4) provided with bearing surface (10) for the rotor and at least two anchor legs (7, 8) extending from running part (4) and directed radially inwardly as well as axially outwardly.Type: GrantFiled: August 6, 2001Date of Patent: July 1, 2003Assignee: Firma Carl FreudenbergInventor: Roland Fietz
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Patent number: 6586553Abstract: A polyurethane molding mass that can be processed thermoplastically, that is free of by-products capable of migration, and demonstrates a high level of light-fastness. A polyurethane molding mass that can be processed thermoplastically, that is free of cyclic oligourethanes capable of migration, and demonstrates a high level of light-fastness, can be obtained, according to the invention, by reaction of one or more aliphatic polyols with a molecular weight of 450 to 4000 g/mol and an OH number of 20 to 235, selected from the group of polyadipates, polycaprolactones, polycarbonates, polytetrahydrofurane, and corresponding copolymers or mixtures of them, with 1,6-hexamethylene diisocyanate and a chain lengthening agent selected from the group of 1,5-pentane diol, 1,6-hexane diol, and 1,4-cyclohexane diol, with an equivalence ratio of the 1,6-hexamethylene diisocyanate to the polyol of 1.5:1 to 14.Type: GrantFiled: March 30, 2000Date of Patent: July 1, 2003Assignee: Firma Carl FreudenbergInventors: Horst Mühlfeld, Silke Wagener
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Patent number: 6581267Abstract: A vibration canceler for a shaft rotating about an axis, including an inertial ring which is fastened to the shaft in a relatively twistable manner by at least one elastic ring made of a rubber-like material. The elastic ring contacts the outer circumference of the shaft in a directly abutting manner and is untwistably pressed on to the shaft by the inertial ring.Type: GrantFiled: February 27, 1996Date of Patent: June 24, 2003Assignee: Firma Carl FreudenbergInventor: Andreas Olbrich
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Patent number: 6582213Abstract: The bellows (6) of a filter cartridge is inserted into an injection-molding die (3) and provided with the plastic frame (24) by an injection-molding process. The surfaces of the die (3) that lie opposite one another are provided, at least at their edge surfaces (15), with sawtooth-like profiles (1, 2; 30, 31). The sawtooth-like profiles engage with one another and hold the individual folds (22, 23; 35, 36) of the bellows (6) in a defined position relative to one another. The bellows (6) is held by the profiles (1, 2; 30, 31) at its face edges (19) over a narrow region (18), and pressed together, forming a seal, for the injection-molding process.Type: GrantFiled: December 1, 2000Date of Patent: June 24, 2003Assignee: Firma Carl FreudenbergInventor: Udo Michaelis
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Patent number: 6579158Abstract: A flexible, open-pored cleaning body having at least one scouring surface (2) provided in at least one subregion with continuously formed, raised projecting ridges (3), wherein the ridges (3) have regions C,D of different heights in the direction of their extension.Type: GrantFiled: June 7, 2001Date of Patent: June 17, 2003Assignee: Firma Carl FreudenbergInventor: Carl-Uwe Tintelnot
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Patent number: 6571416Abstract: A surface cleaning device comprising a broom (1) and a brush (2), each having bristles (4, 5) on the side facing the surface to be cleaned (3) wherein the broom (1) and the brush (2) can be affixed one to the other in a fashion which can be detached without damage and wherein the bristles (4, 5) at the broom (1) and the brush (2) form a functional unit (6) when the brush (2) is affixed to the broom (1).Type: GrantFiled: November 20, 2001Date of Patent: June 3, 2003Assignee: Firma Carl FreudenbergInventor: Gernot M. Hirse
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Patent number: 6573204Abstract: A cleaning cloth having a nonwoven structure for wet, damp and/or dry cleaning, the cleaning cloth being made from micro staple fibers of at least two different polymers and from absorbent secondary staple fibers bound into the micro staple fibers and securely retained therein.Type: GrantFiled: April 12, 2000Date of Patent: June 3, 2003Assignee: Firma Carl FreudenbergInventors: Dieter Philipp, Jochen Wirsching, Steffen Kremser
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Patent number: 6572271Abstract: An elastic bearing suspension for a shaft bearing (1) is described. The shaft bearing (1) is connected on the outside radially to at least one stop buffer (2) made of an elastomer material, the stop buffer (2) being connected to a first supporting ring (5) arranged adjacent to and at an axial distance (4) from the shaft bearing (1) by way of at least one fold (3) made of an elastomer material which extends in the axial direction and has a V-shape as seen in the longitudinal sectional of the shaft bearing (1), the first supporting ring (5) being connected to one of the end faces (6) of a stop sleeve (7), the other end face (8) of the stop sleeve (7) surrounding the stop buffer (2) on the outer circumference at a radial distance.Type: GrantFiled: September 26, 2001Date of Patent: June 3, 2003Assignee: Firma Carl FreudenbergInventors: Karl-Heinz Bade, Michael Schütz, Alexander Meier
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Patent number: 6573447Abstract: An electric device including a housing having a wall (2) made of solidified polymeric material and at least one electric component (5) which is situated inside the housing and is connected via at least one electric line (4) to at least one electric component which is situated outside or inside the housing, the line (4) being configured to be flexible and being at least partially embedded in the wall (2) of the housing during the molding and solidification of the housing.Type: GrantFiled: July 6, 2001Date of Patent: June 3, 2003Assignee: Firma Carl FreudenbergInventors: Günter Trogisch, Peter Schäfer, Stefan Plötz, Martin Quarder
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Patent number: 6568912Abstract: A method for measuring the pumping operating parameters of a diaphragm delivery unit, the conductivity of a resistance device mounted on a diaphragm being measured, at least over one pumping period, as a time-dependent quantity, and this quantity being used in the measurement.Type: GrantFiled: May 17, 2001Date of Patent: May 27, 2003Assignee: Firma Carl FreudenbergInventor: Gerhard Röhner
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Patent number: 6561518Abstract: A seal arrangement having a sealing flange (1) with at least one first seal (2) and a carrier flange (3) with a holder (4) for a sensor (5). The sealing flange (1) and the carrier flange (3) are each produced separately, are made of a metallic material, and are connected with one another with a non-positive and/or a positive lock.Type: GrantFiled: October 25, 2000Date of Patent: May 13, 2003Assignee: Firma Carl FreudenbergInventor: Dominique Lutaud