Patents Assigned to Firma Carl Freudenberg
  • Patent number: 6345552
    Abstract: A speed-adaptive vibration damper for a shaft that rotates about an axis, having a hub part, on which are located a plurality of peripherally adjacent inertial masses that are movable along curved paths that increasingly approach the axis on either side of the masses. At least one relatively twistable inertial ring is elastically mounted on the hub part. When rotational vibrations set in, a change occurs in the distance of the inertial masses from the axis.
    Type: Grant
    Filed: July 9, 1999
    Date of Patent: February 12, 2002
    Assignee: Firma Carl Freudenberg
    Inventors: Bernhard Röhrig, Hans-Gerd Eckel
  • Patent number: 6345825
    Abstract: A sealing arrangement including a ring gasket having at least one dynamically stressed sealing lip which is in sealing contact with a first machine element. A multipole ring made of a magnetized elastomer material is connected to a carrier ring and is moveable past an rpm sensor for detecting rotational movement of the first machine element relative to a second machine element. The carrier ring has an essentially C-shaped profile which is open axially in the direction of the ring gasket and is connected in a rotationally fixed manner to the first machine element. A first leg of the carrier ring is connected to the first machine element has an end which is adjacent the sealing lip at an axial distance.
    Type: Grant
    Filed: August 17, 1999
    Date of Patent: February 12, 2002
    Assignee: Firma Carl Freudenberg
    Inventors: Wolfgang Guth, Günter Bergmann, Markus Von Geisau
  • Patent number: 6344238
    Abstract: A process for the production of fusible interlining fabrics, wherein an interlining fabric (1) is discontinuously printed over its area with a reactive adhesive (2), and a particulate hot-melt glue (3) is applied to the adhesive (2) while it is still reactive. In another step, particles (3.1) can be pressed on, and subsequently the excess particles (3.2) of the hot-melt glue (3) can be removed.
    Type: Grant
    Filed: April 13, 2000
    Date of Patent: February 5, 2002
    Assignee: Firma Carl Freudenberg
    Inventors: Erich Schmitt, Peter Grynaeus, Thomas Kümpel
  • Patent number: 6343782
    Abstract: A vibration canceller having an inertial mass that is nonpositively joined to at least one spring element. The spring element is made exclusively of elastomeric material, is configured in substantially rod-shaped fashion, and is equipped on at least one of its end faces with a plug-shaped enlargement, the enlargement being arranged, under elastic preload, in a congruently configured opening of the inertial mass.
    Type: Grant
    Filed: June 7, 1999
    Date of Patent: February 5, 2002
    Assignee: Firma Carl Freudenberg
    Inventors: Herwig Hönlinger, Günter Zeis
  • Patent number: 6338489
    Abstract: A mechanical seal including a slide ring and a counter-ring that are axially preloaded against each other along sealing surfaces through the application of spring tension. These surfaces contact each other in a manner that permits the sealing surfaces to rotate relative to each other. The slide ring and a housing, which is arranged in a rotatably fixed manner relative to slide ring, are each sealingly allocated to one end face of a bellows extending in the axial direction. One of the end faces of bellows is allocated nonadherently, with force-locking and/or form-locking, to slide ring, and the other end face of bellows is allocated nonadherently, with force-locking and/or form-locking, to housing.
    Type: Grant
    Filed: October 1, 1999
    Date of Patent: January 15, 2002
    Assignee: Firma Carl Freudenberg
    Inventor: Kenji Nakano
  • Patent number: 6338492
    Abstract: A sealing system for large-surface thin parts to be interconnected, used for the mutual sealing of separating plates, in particular of bipolar plates with interposed ion-exchange membrane units (MEA) in fuel cells. The system uses sealing elements made of polymer material, in which the individual sealing elements, injected into recesses, form an integral unit with the respective associated bipolar plate. Provision is made between the side walls of the sealing elements and the adjacent walls of the recesses for free spaces or gaps to accommodate the elastic sealing material which spreads during the compression. The sealing elements only partially fill the recesses or gaps and the height (H) of the sealing elements are greater than the depth (T) of the recess or gaps before the compression.
    Type: Grant
    Filed: February 28, 2000
    Date of Patent: January 15, 2002
    Assignee: Firma Carl Freudenberg
    Inventors: Herman Schilling, Eberhard Bock, Günter Hofmann
  • Publication number: 20020004347
    Abstract: A water-soluble fusible embroidery liner, made of a water-stable nonwoven fabric having a weight per unit area of 20 to 120 g/m2, which is coated by a water-soluble, thermoplastic polymer as the adhesive mass.
    Type: Application
    Filed: July 3, 2001
    Publication date: January 10, 2002
    Applicant: Firma Carl Freudenberg
    Inventors: Manfred Jost, Peter Grynaeus
  • Patent number: 6336638
    Abstract: A radial shaft seal with a sealing disk made of a polymer material which curves towards a space that is sealed as the sealing disk radially approaches a shaft with respect to which it forms a seal. The sealing disk has a first surface profiling on the side facing the shaft and a second surface profiling on the side facing away from the shaft, the first surface profiling being formed by sawtooth recesses arranged adjacent to one another axially at a distance. The first bordering surfaces of the recesses facing the space to be sealed form a smaller angle with the shaft than second bordering surfaces of the recesses facing away from the space to be sealed. The second surface profiling is formed by essentially U-shaped recesses which are open on the side facing away from the shaft and are arranged adjacent to one another with an axial distance between them.
    Type: Grant
    Filed: August 12, 1999
    Date of Patent: January 8, 2002
    Assignee: Firma Carl Freudenberg
    Inventors: Wolfgang Guth, Werner Hufnagel
  • Publication number: 20020001503
    Abstract: A guide sleeve includes an outer bushing, which encloses an inner bushing with radial clearance, an elastic spring member made of an elastomeric material being arranged in gap created by the clearance, and inner bushing having at least one lubricant pocket open radially to the inside.
    Type: Application
    Filed: June 29, 2001
    Publication date: January 3, 2002
    Applicant: Firma Carl Freudenberg
    Inventor: Kurt Jager
  • Patent number: 6325383
    Abstract: A sealing arrangement having two machine parts which are moved relative to one another and which enclose a sealing ring, the sealing arrangement having a radially internal retaining part, a radially external sealing part, and a resilient connecting part joining these two. The sealing part is prestressed with respect to the radially outward opposing sealing surface exclusively by the elongation of the holding part while the diameter of the sealing part remains unchanged.
    Type: Grant
    Filed: August 20, 1999
    Date of Patent: December 4, 2001
    Assignee: Firma Carl Freudenberg
    Inventors: Otto Kahle, Hans Werther
  • Publication number: 20010042278
    Abstract: A holder is provided for securing a mop at the end of a handle, a plurality of relatively moveable, absorbent strips made of a textile material being affixed as a result of being clamped between a headpiece and a plate, essentially at right angles to the longitudinal axis of the handle.
    Type: Application
    Filed: May 21, 2001
    Publication date: November 22, 2001
    Applicant: Firma Carl Freudenberg
    Inventors: Uwe Dingert, Joerg Dunkel
  • Patent number: 6302933
    Abstract: The separator (1) has a tubular inlet opening (2) and two tubular outlet openings (3, 4) which are connected with one another in a flow-carrying manner. A separating device (6) is disposed in the flow direction (5) between the inlet opening (2) and the outlet openings (3, 4). One of the outlet openings (3) carries substantially only separated liquid and the other outlet opening (4) carries substantially only gas freed of liquid. An outer tube (7) surrounds an inner tube (8) with an all-around space between them. The inner tube (8) is connected at one end to the inlet opening (2) in a flow-carrying manner, and at the other end is associated with the outlet opening (3) for the separated liquid.
    Type: Grant
    Filed: November 11, 1998
    Date of Patent: October 16, 2001
    Assignee: Firma Carl Freudenberg
    Inventors: Wolfgang Krause, Karl-Heinrich Spies, Klaus Döhring, Klaus Kurr
  • Patent number: 6299660
    Abstract: A filter element that is able to be sealingly secured in position in a filter housing, comprising an accordion fold pack. The oncoming-flow side of accordion fold pack is covered by a latticed protective mask. The protective mask is sealingly joined to all fold backs of accordion fold pack on the clean-air side. In this manner, the fold edges are protected from damage during the periodic cleaning in the face of the back-blasted air used for that purpose.
    Type: Grant
    Filed: January 17, 1997
    Date of Patent: October 9, 2001
    Assignee: Firma Carl Freudenberg
    Inventors: Peter Pfeuffer, Hans-Joachim Lippold, Markus Fronhöfer, Hans Leibold
  • Patent number: 6289572
    Abstract: A sealing arrangement including a sealing ring with a support ring extending substantially in a radial direction. The support ring is joined in the radial direction to a first sealing element that lies in contact with and is nonrotatable with respect to a first machine element to form a static seal. The support ring is also joined in the radial direction to a second sealing element that is placed against a second machine element rotatably with respect to the second machine element to create a dynamic seal. The first and second sealing elements are each made of an elastomeric material, and the sealing ring has, in order to sense rotational movements of the first machine element about its axis, at least one auxiliary device that can move past a rotational speed sensor. The auxiliary device can be a multipole ring made of a pasty, hardenable, and magnetizable material that is arranged as a intermediate layer of film-like thinness on the side of the support ring facing the rotational speed sensor.
    Type: Grant
    Filed: May 4, 1998
    Date of Patent: September 18, 2001
    Assignee: Firma Carl Freudenberg
    Inventors: Berthold Lannert, Hans-Gerd Eckel, Horst Kober, Stefan Burger
  • Patent number: 6287407
    Abstract: The invention relates to a structured textile material made of at least two different, needled base nonwoven fabrics. The base nonwoven fabrics have a structure obtained by needling from at least one side. The needles used for the structure needling are fork needles or crown needles, and the depth of the forks and barbs, respectively, is so selected that, when piercing through, they completely fill up with fibers of the base nonwoven fabric facing the needles. The textile material have unmixed, pure fibers in the pattern, in the background and on the reverse side.
    Type: Grant
    Filed: July 2, 1998
    Date of Patent: September 11, 2001
    Assignee: Firma Carl Freudenberg
    Inventors: Karlheinz Stein, Heinrich Laun, Michel Pässler
  • Patent number: 6281258
    Abstract: A sponge of decrystallized cellulose modified by an acetyl group content, where the average degree of substitution is 0.2 to 1.5. No organic or inorganic sulfur compounds are present in the sponge. The sponge is produced by treating pulp with sodium hydroxide solution, then treating it with acetylating substances, drying and dissolving in an organic solvent with the addition of a pore-forming salt, fibers and optionally pigment dyes, pressing the mixture into a perforated mold whose receiving volume corresponds to the dimensions of the sponge to be produced, then placing the mold with its contents in boiling water, and removing the sponge thus formed in the mold.
    Type: Grant
    Filed: January 19, 1999
    Date of Patent: August 28, 2001
    Assignee: Firma Carl Freudenberg
    Inventors: Jörg Hausdorf, Eberhard Link
  • Patent number: 6280330
    Abstract: A flywheel, including a first rotating ring that is connectible to a drive shaft and a second rotating ring that is connectible to a driven shaft. The first and the second rotating rings are twistable relative to one another and are supported concentrically one inside the other. Provision is made between the first and the second rotating ring for a torsion spring to suppress torsional vibrations. A speed-adaptive absorber is affixed to the second rotating ring, the speed-adaptive absorber including at least one hub part that is rotatable about an axis of rotation, as well as a plurality of damper masses which are able to swivel at least in the circumferential direction about swivel axes that are set apart from the axis of rotation.
    Type: Grant
    Filed: July 1, 1999
    Date of Patent: August 28, 2001
    Assignee: Firma Carl Freudenberg
    Inventors: Hans-Gerd Eckel, Lydia Weiss
  • Patent number: 6281259
    Abstract: A sponge cloth of decrystallized cellulose modified by the acetyl group content, where the average degree of substitution is 0.2 to 1.5. The cloth does not contain any organic or inorganic sulfur compounds. The sponge cloth is produced by treating wood pulp with sodium hydroxide solution, then treating it with acetylating substances, drying and dissolving in an organic solvent with the addition of a pore-forming salt, fibers and optionally pigment dyes and foaming agents, spreading the mixture on a web and boiling in water with subsequent drying to form a finished cloth.
    Type: Grant
    Filed: January 20, 1999
    Date of Patent: August 28, 2001
    Assignee: Firma Carl Freudenberg
    Inventors: Jörg Hausdorf, Eberhard Link
  • Patent number: 6276672
    Abstract: A dual-mode twin-chamber thrust bearing has a work chamber and an equalizing chamber. The chambers are separated by a partition. The partition has passageway in the center that is closable via an actuator, and also has a damping channel that hydraulically connects two chambers. The partition also has holes. A membrane is located in a recess in the partition. The partition covers the holes in the partition and can be tightly sealed. An axially movable pressure disk secures or releases the membrane as it is pushed by the actuator. The pressure disk is provided with holes in the area of the partition holes.
    Type: Grant
    Filed: January 21, 2000
    Date of Patent: August 21, 2001
    Assignee: Firma Carl Freudenberg
    Inventors: Hans-Joachim Rudolf, Heinz Weber
  • Patent number: 6274521
    Abstract: A spun nonwoven fabric contains monofilaments and bicomponent filaments, the spun nonwoven fabric having, over its cross section, different quantities of the bicomponent filaments. The bicomponent filaments contain at least two outward-facing segments made of a binding component. The proportions of bicomponent filaments over the cross sectional planes of the spun nonwoven fabric can be in a range of approximately 1% to 100% by weight. The cross sectional planes of the nonwoven fabric containing the different proportions of bicomponent filaments transition into one another without detectable phase boundaries. The apparatus for manufacturing the nonwoven fabric contains at least one, and may contain up to forty or more, spinneret devices, such as rectangular spinneret plates or round spinneret disks. The spinneret devices may be arranged in rows or in staggered arrangement above a linearly moving collector belt.
    Type: Grant
    Filed: March 7, 2000
    Date of Patent: August 14, 2001
    Assignee: Firma Carl Freudenberg
    Inventors: Detlef Barbier, Engelbert Löcher, Ararad Emirze, Norbert Goffing