Patents Assigned to Freudenberg
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Publication number: 20100244390Abstract: A dynamic shaft seal assembly is provided including a dynamic seal for engaging a rotary shaft. The dynamic seal includes a mounting portion that is mounted within a casing and has an axially extending barrel portion extending from a radially inner end of the mounting portion. The axially extending barrel portion terminates in a radially extending leg portion which extends inwardly from an end of the axially extending portion. A generally conically shaped seal portion extends from an end of the radially extending portion and the seal portion includes a radially inner face engaging the shaft and a radially outer face having a stiffening bead integrally formed thereon. The mounting portion defines a bumper spaced from the axially extending barrel portion by a gap distance that is designed to prevent the seal lip from inverting under sustained high pressure or pressure spikes.Type: ApplicationFiled: March 24, 2009Publication date: September 30, 2010Applicant: FREUDENBERG-NOK GENERAL PARTNERSHIPInventors: Alexander Berdichevsky, Rory S. Pawl, Patrick Scheib
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Patent number: 7802491Abstract: A device for dampening torsional vibrations, comprising a centering sleeve (1) for the reception of a rotatable element and a flywheel mass (2) is characterized in that, with regard to the objective to be solved, namely the realization of an arrangement having a constructively simple design and a highly dynamic stability, the centering sleeve (1) and the flywheel mass (2) are connected to each other. Furthermore, an arrangement comprising the mentioned device and a flexible coupling (5) is claimed.Type: GrantFiled: November 21, 2006Date of Patent: September 28, 2010Assignee: Carl Freudenberg KGInventors: Ralf Buck, Markus Duerre, Friedrich Back
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Publication number: 20100239953Abstract: Gas diffusion unit (1) for a fuel cell (2), comprising at least dihedral gas diffusion layers (3, 4) which are provided with seals (5), wherein the seals (5) are fastened on a substrate (6), wherein the substrate (6) connects the gas diffusion layers (3, 4) to one another in an articulated fashion.Type: ApplicationFiled: June 5, 2008Publication date: September 23, 2010Applicant: CARL FREUDENBERG KGInventor: Lars Gerding
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Patent number: 7798497Abstract: A tight package sensor seal includes a first seal portion engaging an outer surface of a sensor body and including a stop surface floatingly engaging a peripheral face surrounding a bore in a cover member. The first seal portion includes a reinforcing insert disposed therein. A second seal portion is axially spaced from the first seal portion and a flexible membrane extends axially between the first and second seal portions. The second seal portion engages an inner diameter of a bore in a cover member and includes a reinforcing insert therein. The sensor seal takes up a small radial space yet allows for radial offset of the sensor body relative to the bore of the cover member.Type: GrantFiled: March 19, 2007Date of Patent: September 21, 2010Assignee: Freudenberg-NOK General PartnershipInventors: John B. Wagner, Kane A. Myers, J. Brian Cloud
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Publication number: 20100229617Abstract: A swaging process is utilized for reducing the diameter of an outer ring of a bushing using a swaging tool including a gap or profile in the area of a flange of the outer ring in order to prevent or reduce the stresses that are formed in the flange radii area.Type: ApplicationFiled: November 16, 2009Publication date: September 16, 2010Applicant: FREUDENBERG-NOK GENERAL PARTNERSHIPInventors: Robert C. Michniewicz, Raise Ahmed
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Patent number: 7790305Abstract: A membrane electrode assembly (MEA) is provided for a fuel cell and includes gas diffusion layers with integrated seals having interlocking features. The interlocking features of the gas diffusion layers allow the MEA to be constructed with a catalyst coated membrane between two gas diffusion layers with the integrated seals of the gas diffusion layers interlocking the gas diffusion layers together to complete the MEA.Type: GrantFiled: February 20, 2007Date of Patent: September 7, 2010Assignee: Freudenberg-NOK General PartnershipInventors: Joseph J. Heystek, Christian F. Fau
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Patent number: 7790642Abstract: A waterproof sheet which allows for better adhesion between multiple waterproof sheets, the sheet including at least one layer of waterproof material arranged between a first and a second layer of spunbonded fabric, the layers of spunbonded fabric having a surface covered by waterproof material and being laterally offset one with respect to the other so as to have a projection of the first layer with respect to the second layer on one side and a projection of the second layer with respect to the first layer on the opposite side.Type: GrantFiled: December 27, 2006Date of Patent: September 7, 2010Assignee: Freudenberg Politex S.R.L.Inventor: Alfredo Romantini
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Publication number: 20100219069Abstract: A gas diffusion layer having a layer (2) comprising fibers (1), whereby the fibers (1) are partially provided with a coating material (3), whereby the fibers (1) lie against each other at contact sites (4) and whereby the layer (2) has boundary surfaces (5) facing the surroundings—in terms of achieving the envisaged objective of ensuring an optimal electric conductivity—is characterized in that the fibers are freed of coating material (3) at the contact sites and/or at the boundary surfaces. Furthermore, a method is proposed for the production of a gas diffusion layer, said method comprising the step that the coating material (3) is selectively removed from the fibers (1) in certain areas.Type: ApplicationFiled: August 9, 2006Publication date: September 2, 2010Applicant: Carl Freudenberg KGInventors: Klaus-Dietmar Wagner, Achim Bock, Karim Salama, Achim Weller
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Publication number: 20100219588Abstract: A dynamic seal utilizes a groove on the active side of the seal to capture a leaked lubricant and pump the lubricant back into the lubricated side of the seal. The groove stops short of the leading edge of the seal that faces the lubricant side forming a static dam between the termination point of the groove and the seal edge. When the fluid pressure within the groove exceeds the opening pressure for the seal lip, the lubricant within the groove is pumped back into the lubricant side of the seal. The groove can have an induction zone wherein the fluid pressure rise is gradual and a booster zone wherein the fluid pressure rise is relatively faster than in the induction zone. The booster zone is disposed adjacent the static dam. Bars are provided across the spiral grooves to prevent contaminants from reaching and becoming trapped in the booster zone.Type: ApplicationFiled: February 24, 2010Publication date: September 2, 2010Applicant: FREUDENBERG-NOK GENERAL PARTNERSHIPInventors: John A. London, Robert Scavuzzo, Alexander Berdichevsky
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Publication number: 20100209684Abstract: A method with which a textile sheet having good mechanical properties in respect to relatively high values regarding tear propagation resistance can be produced. The textile sheets are used in areas that require relatively high tear propagation resistance. The textile sheets also have relatively high peak tensile values and/or elongation at break values. The method for the production of a tear propagation-resistant textile sheet comprises providing a starting textile sheet made of yarns, fibers or filaments formed of at least two elementary filaments and having an arrangement in cross-section like orange segments or pie slices with the segments or slices made of different polymers, and exposing the starting textile sheet to a compressing heat treatment, wherein the polymer segments are permeated and a substantially non-adhesive bond is achieved between the polymer segments. The textile sheet may comprise nonwoven materials having a specific tear propagation resistance of equal to or greater than 0.Type: ApplicationFiled: July 2, 2008Publication date: August 19, 2010Applicant: CARL FREUDENBERG KGInventors: Robert Groten, Ulrich Jahn, Georges Riboulet, Michael Hess, Ameur Abdelkader
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Publication number: 20100206804Abstract: A ply includes a fibrous nonwoven web fabric forming a foundational structure, wherein the foundational structure includes fibers forming first pores and is partially filled with particles, wherein the particles at least partially fill the first pores so as to form regions filled with particles, wherein the particles in the filled regions form second pores, and wherein an average diameter of the particles is greater than an average pore size of more than 50% of the second pores.Type: ApplicationFiled: September 8, 2008Publication date: August 19, 2010Applicant: CARL FREUDENBERG KGInventors: Christoph Weber, Michael Roth, Peter Kritzer, Gunter Scharfenberger, Rudolf Wagner
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Publication number: 20100208241Abstract: A measuring device for analyzing a lubricant of a bearing. The measuring device has an electromagnetic radiation emitter, a receiving element and a test area that is arranged between the emitter and the receiving element. The measuring device allows for current information on the condition of the lubricant in the bearing to be obtained. At least some sections of the test area are inside the bearing and the receiving element supplies a spectrum of electromagnetic radiation captured by the test area. Also, a bearing and a seal for the bearing and a method for detecting and monitoring the condition of the lubricant of a bearing.Type: ApplicationFiled: August 27, 2008Publication date: August 19, 2010Applicants: SCHAEFFLER TECHNOLOGIES GMBH & CO. KG, CARL FREUDENBERG KGInventors: Joerg Franke, Joachim Hering, Martin Kram, Joachim Schleifenbaum, Alexander Weiss, Gerhard Roehner, Sven Floesser, Marcel Schreiner, Thomas Otto, Thomas Gessner
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Publication number: 20100207332Abstract: A tube seal is provided including a rigid cylindrical tube and an elastomeric seal body molded to the outer surface of the cylindrical tube. The rigid cylindrical tube includes a recessed annular groove at each end thereof for receiving the elastomeric seal body therein to create a mechanical connection to resist the seal body from being pulled away from the cylindrical tube. The tube seal is also incorporated into a diameter reducing tube seal, an integrated tube seal and filter design and an integrated tube seal and valve design.Type: ApplicationFiled: May 3, 2010Publication date: August 19, 2010Applicant: FREUDENBERG-NOK GENERAL PARTNERSHIPInventor: Timothy T. Smith
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Patent number: 7775528Abstract: A bi-directional dynamic seal advantageously provides for the return of captured lubricant to the lubricant side regardless of a direction of relative rotation between the seal and the shaft. The seal utilizes a pattern of symmetrical pumping elements to facilitate the hydrodynamic pumping of the captured lubricant in response to the relative rotation. The symmetrical pumping elements have ending points that stop short of the seal edge of the seal. The seal may utilize secondary pumping elements that communicate with the primary pumping elements to capture lubricant that is not captured by the primary pumping elements.Type: GrantFiled: April 5, 2007Date of Patent: August 17, 2010Assignee: Freudenberg-NOK General PartnershipInventor: Alexander Berdichevsky
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Publication number: 20100199620Abstract: A filter arrangement for filtering a fluid or gaseous medium, in particular in a motor vehicle, comprising a housing (1) which holds a filter element (3) in a receiving space (2), wherein the filter element (3) has an edge region (4) which bears at least in regions against the inner wall (5) of the housing (1), is characterized, with regard to the problem of creating a filter arrangement which is of structurally simple design and has a high filter efficiency, in that the housing (1) is shaped such that the receiving space (2) tapers at least in regions in at least one spatial direction.Type: ApplicationFiled: April 28, 2008Publication date: August 12, 2010Applicant: CARL FREUDENBERG KGInventors: Uwe Felber, Ulrich Stahl
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Patent number: 7770897Abstract: A dynamic shaft seal assembly is provided including a dynamic seal for engaging a rotary shaft. The dynamic seal includes a base portion that is mounted within a casing and has an axially extending barrel portion extending from a radially inner end of the base portion. The axially extending barrel portion terminates in a radially extending leg portion which extends inwardly from an end of the axially extending portion. A generally conically shaped seal portion extends from an end of the radially extending portion and the seal portion includes a radially inner face engaging the shaft and a radially outer face having a stiffening bead integrally formed thereon. The stiffening bead reduces the seal's propensity for “bell mouthing” while the axially extending barrel portion provides improved shaft followability for the dynamic seal.Type: GrantFiled: March 14, 2008Date of Patent: August 10, 2010Assignee: Freudenberg-NOK General PartnershipInventor: Alexander Berdichevsky
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Patent number: 7770598Abstract: A valve includes a housing having an inlet (3), an outlet (1) and a movable sealing member (2) which allows the inlet (3) and the outlet (1) to be connected in fluid communication with each other, the sealing member (2) having associated therewith effective areas (4b) to which pressure can be applied, and sealing areas (4), and the sealing member (2) further having associated therewith a sealing seat (4a) for sealing the inlet (3) from the outlet (1). In order to provide a valve by which pressure can be relieved in a very short time, the sealing member (2) has associated therewith a conduit (2a) by which the inlet (3) and the outlet (1) can be connected in fluid communication with each other when the sealing member (2) rests on the sealing seat (4a).Type: GrantFiled: December 6, 2007Date of Patent: August 10, 2010Assignee: Carl Freudenberg KGInventors: Joerg Bittner, Torsten Gerlich, Volker Daume, Stefan Hettinger, Klaus Bickel
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Publication number: 20100193975Abstract: A humidifier includes a housing and a humidifier module having a first and a second end face and a plurality of replacement members secured at the first and second end faces by a sealing compound, wherein the housing is configured to accommodate the humidifier module, and wherein the humidifier module is retained in the housing in positive engagement with the housing at at least one of the first and the second end face.Type: ApplicationFiled: August 29, 2008Publication date: August 5, 2010Applicant: CARL FREUDENBERG KGInventors: Andreas Kammann, Udo Eping, Bernd Altmueller
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Publication number: 20100196688Abstract: A ply includes a fibrous nonwoven web fabric forming a foundational structure, wherein the foundational structure includes fibers forming first pores and is partially filled with particles, wherein the particles at least partially fill the first pores so as to form regions filled with particles, wherein the particles in the filled regions form second pores such that an average diameter of the particles is greater than an average pore size of more than 50% of the second pores.Type: ApplicationFiled: June 16, 2008Publication date: August 5, 2010Applicant: CARL FREUDENBERG KGInventors: Peter Kritzer, Christoph Weber, Rudolf Wagner, Gunter Scharfenberger, Michael Roth
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Patent number: D621622Type: GrantFiled: November 2, 2007Date of Patent: August 17, 2010Assignee: Freudenberg Household Products LPInventors: Robert Giacolo, Norbert Weis, David McKnight