Patents Assigned to Firma Carl Freudenberg
  • Patent number: 6666459
    Abstract: 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: Grant
    Filed: April 6, 2000
    Date of Patent: December 23, 2003
    Assignee: Firma Carl Freudenberg
    Inventor: Werner Hufnagel
  • Patent number: 6663091
    Abstract: 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 increase
    Type: Grant
    Filed: December 18, 2001
    Date of Patent: December 16, 2003
    Assignee: Firma Carl Freudenberg
    Inventor: John Philip West
  • Patent number: 6663090
    Abstract: 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: Grant
    Filed: May 25, 2001
    Date of Patent: December 16, 2003
    Assignee: Firma Carl Freudenberg
    Inventors: Arnold Simuttis, Werner Hettler
  • Patent number: 6655667
    Abstract: 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: Grant
    Filed: May 26, 2000
    Date of Patent: December 2, 2003
    Assignee: Firma Carl Freudenberg
    Inventors: Arno Hamaekers, Hans-Joachim Rudolf
  • Patent number: 6656400
    Abstract: 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: Grant
    Filed: March 28, 2001
    Date of Patent: December 2, 2003
    Assignee: Firma Carl Freudenberg
    Inventors: Klaus Veeser, Anthony Hollingsworth, Dirk Dantz
  • Patent number: 6655694
    Abstract: 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: Grant
    Filed: March 31, 2000
    Date of Patent: December 2, 2003
    Assignee: Firma Carl Freudenberg
    Inventor: Kenji Nakano
  • Patent number: 6647600
    Abstract: 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: Grant
    Filed: July 25, 2001
    Date of Patent: November 18, 2003
    Assignee: Firma Carl Freudenberg
    Inventors: Manfred Jöst, Dieter Groitzsch, Gerhard Schaut
  • Patent number: 6630269
    Abstract: 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: Grant
    Filed: December 29, 2000
    Date of Patent: October 7, 2003
    Assignee: Firma Carl Freudenberg
    Inventors: Thomas Barth, Klaus Kaspar, Birgit Severich
  • Patent number: 6591856
    Abstract: 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: Grant
    Filed: October 31, 2001
    Date of Patent: July 15, 2003
    Assignee: Firma Carl Freudenberg
    Inventors: Uwe Meinig, Jörg Bittner
  • Patent number: 6584758
    Abstract: 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: Grant
    Filed: August 6, 2001
    Date of Patent: July 1, 2003
    Assignee: Firma Carl Freudenberg
    Inventor: Roland Fietz
  • Patent number: 6586553
    Abstract: 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: Grant
    Filed: March 30, 2000
    Date of Patent: July 1, 2003
    Assignee: Firma Carl Freudenberg
    Inventors: Horst Mühlfeld, Silke Wagener
  • Patent number: 6582213
    Abstract: 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: Grant
    Filed: December 1, 2000
    Date of Patent: June 24, 2003
    Assignee: Firma Carl Freudenberg
    Inventor: Udo Michaelis
  • Patent number: 6581267
    Abstract: 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: Grant
    Filed: February 27, 1996
    Date of Patent: June 24, 2003
    Assignee: Firma Carl Freudenberg
    Inventor: Andreas Olbrich
  • Patent number: 6579158
    Abstract: 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: Grant
    Filed: June 7, 2001
    Date of Patent: June 17, 2003
    Assignee: Firma Carl Freudenberg
    Inventor: Carl-Uwe Tintelnot
  • Patent number: 6573204
    Abstract: 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: Grant
    Filed: April 12, 2000
    Date of Patent: June 3, 2003
    Assignee: Firma Carl Freudenberg
    Inventors: Dieter Philipp, Jochen Wirsching, Steffen Kremser
  • Patent number: 6571416
    Abstract: 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: Grant
    Filed: November 20, 2001
    Date of Patent: June 3, 2003
    Assignee: Firma Carl Freudenberg
    Inventor: Gernot M. Hirse
  • Patent number: 6572271
    Abstract: 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: Grant
    Filed: September 26, 2001
    Date of Patent: June 3, 2003
    Assignee: Firma Carl Freudenberg
    Inventors: Karl-Heinz Bade, Michael Schütz, Alexander Meier
  • Patent number: 6573447
    Abstract: 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: Grant
    Filed: July 6, 2001
    Date of Patent: June 3, 2003
    Assignee: Firma Carl Freudenberg
    Inventors: Günter Trogisch, Peter Schäfer, Stefan Plötz, Martin Quarder
  • Patent number: 6568912
    Abstract: 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: Grant
    Filed: May 17, 2001
    Date of Patent: May 27, 2003
    Assignee: Firma Carl Freudenberg
    Inventor: Gerhard Röhner
  • Patent number: 6561518
    Abstract: 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: Grant
    Filed: October 25, 2000
    Date of Patent: May 13, 2003
    Assignee: Firma Carl Freudenberg
    Inventor: Dominique Lutaud