Patents Assigned to Firma Carl Freudenberg
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Patent number: 6141820Abstract: Wipe cover for floor cleaning, featuring a wipe-material layer having pile threads projecting from this layer in the direction of the surface to be cleaned, and means for securing to a retainer, at least one layer of non-woven fabric being provided, forming edges projecting beyond the wipe-material layer.Type: GrantFiled: December 2, 1998Date of Patent: November 7, 2000Assignee: Firma Carl FreudenbergInventors: Michael Schmiedhoff, Carl-Uwe Tintelnot, Francesco Sartori
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Patent number: 6143046Abstract: A filter cartridge, including a tubular filter element which encloses an interior space on the downstream, clean air side, is joined in the axial direction on one side to a side-face lid, forming a seal. In order to reduce pressure peaks which occur in the filter element on the clean air side, the lid has a diaphragm which is capable of vibrating.Type: GrantFiled: September 9, 1998Date of Patent: November 7, 2000Assignee: Firma Carl FreudenbergInventors: Hans Wiegand, Uwe Visel
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Patent number: 6122814Abstract: A process for manufacturing a ring that has at least one cylindrical end section that ends in a chamfer is disclosed. The process entails providing a flat-shaped article which is formed of a material capable of being deep-drawn. The flat-shaped article is stamped to provide indentations which correspond to the chamfer in the finished product. The flat-shaped article is then punched out to form a preform. The preform is then deep drawn, converting the preform into the shape of the ring. In the step of deep drawing the preform, the indentations form a chamfered section on the ring.Type: GrantFiled: December 11, 1998Date of Patent: September 26, 2000Assignee: Firma Carl FreudenbergInventors: Helmet Pennig, Wolfgang Nickl, Wilhelm Dieter
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Patent number: 6116012Abstract: A supporting disk for a rotor of an open-end spinning machine comprising a hub ring made of metallic material and a support ring made of polymer material affixed to the outer circumferential surface of the hub ring, the outer circumferential surface of the hub ring engaging the inner circumferential surface of the support ring. The support ring extends beyond the hub ring in the axial direction on both sides with an equal projecting length.Type: GrantFiled: May 3, 1999Date of Patent: September 12, 2000Assignee: Firma Carl FreudenbergInventor: Otmar Braun
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Patent number: 6108854Abstract: A rubber broom having a broom body with a set of bristles arranged on its underside, the set of bristles being integrally formed in one piece and made of an elastic polymer material. The broom body is a molded part produced separately from the set of bristles and has an underside which is raised in the direction of the rim at at least one area. The set of bristles is a component of a deformable supporting layer that provides close-fitting contact against the underside of the broom body along at least the circumferential rim of the broom body.Type: GrantFiled: December 22, 1998Date of Patent: August 29, 2000Assignee: Firma Carl FreudenbergInventor: Uwe Dingert
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Patent number: 6105970Abstract: A sealing arrangement for establishing a seal between two machine elements, such as a rod or piston undergoing axial motion within a housing. A rod or piston seal is arranged in a groove of the second machine element, which typically is the housing of the rod or piston. The groove is open in the direction of the first machine element, and contains a seal ring and a prestress ring made of elastomeric material. The seal ring has an essentially T-shaped cross-section and touches the surface of the first machine element which is to be sealed with the sealing surface of its radial ridge, forming a seal. The prestress ring is arranged between the base of the groove and the axial ridge of the seal ring, under elastic prestress. The transition from the faces of the radial ridge to the sealing surface is rounded.Type: GrantFiled: August 28, 1998Date of Patent: August 22, 2000Assignee: Firma Carl FreudenbergInventors: Uwe Siegrist, Otmar Braun
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Patent number: 6106421Abstract: An uncoupled belt pulley having a hub ring and a flyring, the hub ring and flyring being associated together, concentrically adjacent to one another and radially spaced apart, with a first spring body that is disposed in a gap formed by the interposed space. A belt pulley is connected to the hub ring in a rotationally elastic manner via a second spring body. The belt pulley and the second spring body are axially adjacent to one another.Type: GrantFiled: November 10, 1998Date of Patent: August 22, 2000Assignee: Firma Carl FreudenbergInventors: Stefan Graber, Peter Barsch
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Patent number: 6099776Abstract: 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 23, 1999Date of Patent: August 8, 2000Assignee: Firma Carl FreudenbergInventor: Carl-Uwe Tintelnot
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Patent number: 6095304Abstract: A clutch of a periodically-activated prime mover or driven machine having an integrated speed-adaptive damper. The damper is mounted directly on a connected flywheel, and a clutch plate and a pressure plate are arranged between the flywheel and the damper. The damper, in the area of its inner circumference, has a support for a clutch-actuation device, and the clutch-actuation device has a force-originating lever part and a spring part independent of the force-originating lever part.Type: GrantFiled: August 17, 1998Date of Patent: August 1, 2000Assignee: Firma Carl FreudenbergInventor: Hans-Gerd Eckel
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Patent number: 6087279Abstract: A textile surface-area material used for cleaning, having a non-woven material and structures raised over the non-woven material. The structures are on both sides of the surface-area material. The structures can be full-surface or partial surfaces, and the base non-woven material can have structures, staggered on both sides, formed by structure needling. Spacings can be maintained between the structures which corresponds at least to a dimension of the structure on the opposite side. The non-woven can have at least two layers, laminated together, of a non-woven material provided on one side with structures.Type: GrantFiled: March 12, 1998Date of Patent: July 11, 2000Assignee: Firma Carl FreudenbergInventor: Heinrich Hans Laun
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Patent number: 6068247Abstract: A hydraulic sleeve having at least two liquid-filled working chambers. These chambers are in flow communication with one another through a damping channel. The hydraulic sleeve comprises an inner supporting body surrounded by an outer supporting body. A radial clearance is maintained between the inner and outer supporting bodies. An elastic spring element of elastomeric material is arranged in the gap formed by the radial clearance, and at least one separately produced insertion part is arranged in at least one of the working chambers. The elastic spring element has an essentially triangular cross-section and bounds the first working chamber. The insertion part is arranged within the triangularly bounded, first working chamber, has an essentially .OMEGA.-shaped cross-section, and divides the first working chamber into three sectional chambers. The sectional chambers are in flow communication with one another through two throttle orifices that are bounded by the elastic spring element and the insertion part.Type: GrantFiled: May 8, 1997Date of Patent: May 30, 2000Assignee: Firma Carl FreudenbergInventor: Axel Rudolph
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Patent number: 6062571Abstract: A radial shaft sealing ring has at least one dynamically stressed first seal and at least one statically stressed second seal. The first and second seals are connected to a support ring having a centering seat that is placeable into a housing bore. The support ring has an axial projection which at least partially covers the second seal so as to limit its elastic deformation, and may further contact a housing to be sealed.Type: GrantFiled: January 9, 1998Date of Patent: May 16, 2000Assignee: Firma Carl FreudenbergInventor: Gunter Hintenlang
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Patent number: 6056799Abstract: A tubular accordion filter element having at one end a U-shaped end piece of flexible sealing material embraces a filter body on the outside and inside in an annular manner. A necking is arranged on the outside of the end piece, extending away from the end face of the end piece, the necking being followed by a straight or frustoconical area.Type: GrantFiled: March 26, 1998Date of Patent: May 2, 2000Assignee: Firma Carl FreudenbergInventors: Dieter Unrath, Margit Hofmann
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Patent number: 6053719Abstract: 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. Spinning orifices on the spinneret devices are respectively dedicated to producing a monofilament or a bicomponent filament from a melt and, viewed in the direction of motion of the collector belt, are arranged with respect to one another so as to correspond in their totality to the cross sectional structure of different filament types in the nonwoven fabric.Type: GrantFiled: July 29, 1997Date of Patent: April 25, 2000Assignee: Firma Carl FreudenbergInventors: Detlef Barbier, Engelbert Locher, Ararad Emirze, Norbert Goffing
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Patent number: 6050555Abstract: A vibration damper includes at least one damper mass and at least one bush bearing, the bush bearing having an inner supporting core surrounded with radial clearance by an outer supporting sleeve, a spring mass made of elastomer material that extends essentially radially and joins the supporting core and the supporting casing being arranged in the gap formed by the clearance. The damper mass has an essentially pot-shaped recess, in which the bush bearing is arranged, the supporting casing being pressed in an essentially airtight manner into the recess, and the hollow space delimited by the damper mass and the bush bearing being designed as a pneumatic spring.Type: GrantFiled: May 24, 1999Date of Patent: April 18, 2000Assignee: Firma Carl FreudenbergInventors: Hanno Gartner, Bernhard Rohrig, Richard Schenk
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Patent number: 6045133Abstract: A sealing arrangement which includes a sealing ring with a support ring extending substantially in the radial direction and is joined in the radial direction on one end to a first sealing element that lies in sealing contact with a first machine element nonrotatably with respect thereto and in a statically sealing manner, and is joined in the radial direction on another end to a second sealing element that is placed against a second machine element rotatably with respect thereto and in a dynamically sealing manner. 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 may be a multipole ring, rotatable together with the first machine element about its axis, that is made of a magnetizable material.Type: GrantFiled: January 24, 1996Date of Patent: April 4, 2000Assignee: Firma Carl FreudenbergInventors: Berthold Lannert, Hans-Gerd Eckel, Horst Kober, Stefan Burger
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Patent number: 6045595Abstract: A dust filter bag made of a fiber layer laminated together with a paper layer, where the fiber layer is composed of polymer fibers and is arranged on the downstream-gas side of the paper layer.Type: GrantFiled: July 23, 1998Date of Patent: April 4, 2000Assignee: Firma Carl FreudenbergInventor: Ulrich Freudenberg
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Patent number: 6045600Abstract: A filter cartridge has a filter medium, which, on the circumferential side, is surrounded with clearance by a gasket-seal. A frame is arranged in the gap formed by the clearance, and is sealingly bonded to the edges of the filter medium and the gasket-seal.Type: GrantFiled: August 21, 1998Date of Patent: April 4, 2000Assignee: Firma Carl FreudenbergInventors: Udo Michaelis, Jorgen Knudsen
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Patent number: 6045598Abstract: A filter insert which is insertable in a sealing manner into a filter housing includes an accordion fold pack whose end walls extend perpendicularly with respect to the longitudinal direction of the filter pack. Each of the end walls is surrounded in a sealing manner by a shape-stabilizing, clamp-shaped reinforcing element, each of the reinforcing elements being integrally formed in one piece with a gasket. The gasket is capable of being placed, in a sealing manner under elastic prestressing, against the adjacent housing wall of the filter housing.Type: GrantFiled: December 23, 1998Date of Patent: April 4, 2000Assignee: Firma Carl FreudenbergInventors: Jurgen Fath, Uwe Felber
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Patent number: D426039Type: GrantFiled: June 4, 1997Date of Patent: May 30, 2000Assignee: Firma Carl FreudenbergInventors: Carl Uwe Tintelnot, Michael Schmiedhoff