Patents by Inventor Tatsuro Hosen
Tatsuro Hosen has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).
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Patent number: 11536312Abstract: A sealing bellows made of an elastomeric material includes: a first end face; a second end face; and a casing having a central axis, the casing being arranged in an axial direction between the first and second end faces, the casing including at least one torsion-compensating element for absorbing torsional movements introduced into the sealing bellows substantially without torsional stress. The first end face includes a first static seal and the second end face includes a second static seal. The sealing bellows is made of a TPE material.Type: GrantFiled: September 13, 2019Date of Patent: December 27, 2022Assignee: CARL FREUDENBERG KGInventors: Rainer Knorr, Tatsuro Hosen
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Publication number: 20200088231Abstract: A sealing bellows made of an elastomeric material includes: a first end face; a second end face; and a casing having a central axis, the casing being arranged in an axial direction between the first and second end faces, the casing including at least one torsion-compensating element for absorbing torsional movements introduced into the sealing bellows substantially without torsional stress. The first end face includes a first static seal and the second end face includes a second static seal. The sealing bellows is made of a TPE material.Type: ApplicationFiled: September 13, 2019Publication date: March 19, 2020Inventors: Rainer Knorr, Tatsuro Hosen
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Patent number: 10563691Abstract: A ball joint (100) to be fitted to a knuckle (200) is provided wherein, a shaft section (11) has an annular projection (11a), a dust cover (30) has a seal main body which is made of an elastic body and which integrally includes: a body section (31); a fixed section (32) which is provided in the body section (31) on one end side; and an inner circumferential seal section (33) and a dust seal section (34) which are provided in the body section (31) on another end side, and the ball joint (100) is provided with a positioning member (40) which is mounted to the shaft section (11) in advance before the ball joint (100) is fitted to the knuckle (200) and which positions an end of the dust cover (30) on the other end side with respect to the shaft section (11) so that the inner circumferential seal section (33) is positioned at an opposite side of the spherical section (12) across the annular projection (11a).Type: GrantFiled: May 26, 2016Date of Patent: February 18, 2020Assignee: NOK CORPORATIONInventor: Tatsuro Hosen
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Patent number: 10527088Abstract: A dust cover that enables a dust lip to consistently exhibit its sealing function. The dust cover includes a sealing body made of an elastic material and integrally including a body part 110, a fixed part, and a sealed part 120, and a reinforcing ring 150 made of metal or resin and embedded in the sealed part 120. The sealed part 120 includes a first inner circumferential sealed portion 121a, a second inner circumferential sealed portion 121b, and a dust lip 122 slidable against an end face of a knuckle 400. The reinforcing ring 150 includes a tubular part 151 concentric to a shaft part 310, an inward flange part 152 provided at one end of the tubular part 151 and supported on a flange 330 fixed to the shaft part 310, and a pressing part 154 provided at the other end of the tubular part 151 and pressing the dust lip 122 against the end face of the knuckle 400.Type: GrantFiled: July 13, 2015Date of Patent: January 7, 2020Assignee: NOK CORPORATIONInventor: Tatsuro Hosen
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Publication number: 20190154078Abstract: A dust cover that enables a dust lip to consistently exhibit its sealing function. The dust cover includes a sealing body made of an elastic material and integrally including a body part 110, a fixed part, and a sealed part 120, and a reinforcing ring 150 made of metal or resin and embedded in the sealed part 120. The sealed part 120 includes a first inner circumferential sealed portion 121a, a second inner circumferential sealed portion 121b, and a dust lip 122 slidable against an end face of a knuckle 400. The reinforcing ring 150 includes a tubular part 151 concentric to a shaft part 310, an inward flange part 152 provided at one end of the tubular part 151 and supported on a flange 330 fixed to the shaft part 310, and a pressing part 154 provided at the other end of the tubular part 151 and pressing the dust lip 122 against the end face of the knuckle 400.Type: ApplicationFiled: July 13, 2015Publication date: May 23, 2019Inventor: Tatsuro HOSEN
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Publication number: 20180149192Abstract: A ball joint (100) to be fitted to a knuckle (200) is provided wherein, a shaft section (11) has an annular projection (11a), a dust cover (30) has a seal main body which is made of an elastic body and which integrally includes: a body section (31); a fixed section (32) which is provided in the body section (31) on one end side; and an inner circumferential seal section (33) and a dust seal section (34) which are provided in the body section (31) on another end side, and the ball joint (100) is provided with a positioning member (40) which is mounted to the shaft section (11) in advance before the ball joint (100) is fitted to the knuckle (200) and which positions an end of the dust cover (30) on the other end side with respect to the shaft section (11) so that the inner circumferential seal section (33) is positioned at an opposite side of the spherical section (12) across the annular projection (11a).Type: ApplicationFiled: May 26, 2016Publication date: May 31, 2018Inventor: Tatsuro HOSEN
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Patent number: 9863464Abstract: A dust cover in which an improvement in sealing performance is achieved. A dust cover 100 used in a ball joint includes a seal main body made of an elastic body and integrally having a body portion 110, a fixed portion 130 that is provided on one end side of the body portion 110, and a seal portion 120 that is provided on the other end side of the body portion 110, and an annular auxiliary seal 150 made of resin and provided in the seal portion 120. The seal portion 120 includes an inner peripheral seal portion and a dust lip 122, and the auxiliary seal 150 includes an auxiliary inner peripheral seal portion 151, an auxiliary dust seal portion, and a supported portion 153 that is supported by a collar fixed to a shaft portion on an opposite side to the auxiliary dust seal portion in an axial direction.Type: GrantFiled: October 19, 2015Date of Patent: January 9, 2018Assignee: NOK CORPORATIONInventors: Tatsuro Hosen, Koji Kanagawa
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Patent number: 9850940Abstract: In a dust cover for a ball joint, one end of a ball stud is retained within a socket, the other end is fixed by fastening a knuckle having a notch portion, one end large-diameter and other end small-diameter opening portions are respectively retained to the socket and the shaft, and a plate member is retained between an inner peripheral surface of the knuckle and an outer peripheral surface of the shaft. The plate member is constructed by an annular plate member, an elastic annular seal portion integrally formed in an inner peripheral side of the annular plate member, and an elastic engagement projection in the annular plate member in the knuckle side, and engaging with the notch portion. The annular seal portion is retained in a compression manner between an annular step portion in an inner peripheral surface of the knuckle and an outer peripheral surface of the shaft.Type: GrantFiled: February 5, 2015Date of Patent: December 26, 2017Assignee: NOK CorporationInventors: Tokunori Yanagi, Tatsuro Hosen
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Patent number: 9765893Abstract: A ball joint dust cover is provided. The ball joint dust cover is made of a rubbery elastic material and is provided with a small diameter opening part with which a hard ring is formed. The hard ring is sandwiched by a retainer having a three-sided box shape. The retainer includes a plurality of gaskets contacting the hard ring.Type: GrantFiled: September 13, 2013Date of Patent: September 19, 2017Assignee: NOK CorporationInventor: Tatsuro Hosen
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Publication number: 20170234361Abstract: A dust cover in which an improvement in sealing performance is achieved. A dust cover 100 used in a ball joint includes a seal main body made of an elastic body and integrally having a body portion 110, a fixed portion 130 that is provided on one end side of the body portion 110, and a seal portion 120 that is provided on the other end side of the body portion 110, and an annular auxiliary seal 150 made of resin and provided in the seal portion 120. The seal portion 120 includes an inner peripheral seal portion and a dust lip 122, and the auxiliary seal 150 includes an auxiliary inner peripheral seal portion 151, an auxiliary dust seal portion, and a supported portion 153 that is supported by a collar fixed to a shaft portion on an opposite side to the auxiliary dust seal portion in an axial direction.Type: ApplicationFiled: October 19, 2015Publication date: August 17, 2017Inventors: Tatsuro HOSEN, Koji KANAGAWA
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Publication number: 20170159701Abstract: A dust cover for a ball joint has a spherical head portion, a shaft, a one end large-diameter opening portion, and the other end small-diameter opening portion. An annular groove portion is formed between an inner peripheral surface of a reinforcing ring in the other end small-diameter portion and an outer peripheral side of a seal lip, a metal spring ring is arranged within the annular groove portion and is constructed by a cylinder portion which is fixed and retained to an inner peripheral surface of the reinforcing ring, and a spring portion exists in an inner peripheral surface side of the cylinder portion in such a manner as to be folded back from one end in an axial direction of the cylinder portion and forms slits pressing the seal lip to an outer peripheral surface side of the shaft and uniformly arranged circumferentially.Type: ApplicationFiled: April 20, 2015Publication date: June 8, 2017Inventor: Tatsuro HOSEN
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Patent number: 9528547Abstract: In a dust cover for a ball joint in which a one end large-diameter opening portion is retained to an outer peripheral surface of a socket, the other end small-diameter opening portion is constructed by a tube portion fitted and fixed onto an outer peripheral surface of a shaft, and an outward flange portion extending diametrically outward from an end portion in the socket side of the tube portion, and the dust cover is retained onto a L-shaped hard retainer, a reinforcing ring of the other end small-diameter opening portion is constructed by a cylindrical portion and an inward flange portion extending toward an outer peripheral surface of the retainer from an end portion in the knuckle side of the cylindrical portion, and an end portion in the socket side of the cylindrical portion in the reinforcing ring comes into contact with the outward flange portion of the retainer.Type: GrantFiled: June 3, 2014Date of Patent: December 27, 2016Assignee: NOK CorporationInventors: Tatsuro Hosen, Koji Kanagawa
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Publication number: 20160281771Abstract: In a dust cover for a ball joint, a reinforcing ring is buried in a shaft side attaching portion which is closely fitted and fixed to an outer peripheral surface of a shaft portion of a ball stud of the ball joint, a first inner peripheral projection and a second inner peripheral projection are formed at different axial positions in the reinforcing ring at predetermined intervals in a circumferential direction, the first inner peripheral projection and the second inner peripheral projection having diameters which are slightly greater than an inner peripheral surface of the shaft side attaching portion in their end portions in an inner diameter side as well as extending to the inner diameter side, and the first inner peripheral projection and the second inner peripheral projection exist on phases which do not lap over each other in an axial direction, thereby preventing tracking property reduction.Type: ApplicationFiled: November 11, 2014Publication date: September 29, 2016Inventors: Tatsuro HOSEN, Koji KANAGAWA
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Publication number: 20160273578Abstract: In a dust cover for a ball joint, one end of a ball stud is retained within a socket, the other end is fixed by fastening a knuckle having a notch portion, one end large-diameter and other end small-diameter opening portions are respectively retained to the socket and the shaft, and a plate member is retained between an inner peripheral surface of the knuckle and an outer peripheral surface of the shaft. The plate member is constructed by an annular plate member, an elastic annular seal portion integrally formed in an inner peripheral side of the annular plate member, and an elastic engagement projection in the annular plate member in the knuckle side, and engaging with the notch portion. The annular seal portion is retained in a compression manner between an annular step portion in an inner peripheral surface of the knuckle and an outer peripheral surface of the shaft.Type: ApplicationFiled: February 5, 2015Publication date: September 22, 2016Inventors: Tokunori YANAGI, Tatsuro HOSEN
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Patent number: 9416818Abstract: An object of the invention is to provide a dust cover for a ball joint which can suppress generation of a so-called mouth opening phenomenon in a small-diameter opening portion even under a low-temperature atmosphere, can effectively inhibit a seal performance from being lowered in the small-diameter opening portion and inhibit the sedimentation or the garbage from entering into a dust cover from an external portion, and has a good sealing performance. For this purpose, in a dust cover for a ball joint having a spherical head portion, a shaft, one end large-diameter opening portion, the other end small-diameter portion, and a film portion, concavo-concave engagement is formed between an inner peripheral surface of the rigid ring and an outer peripheral surface of a retainer having a cylindrical portion which is fitted and retained to an outer peripheral surface of the shaft.Type: GrantFiled: November 11, 2013Date of Patent: August 16, 2016Assignee: NOK CorporationInventors: Tatsuro Hosen, Takayoshi Iwasaka
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Publication number: 20160102703Abstract: In a dust cover for a ball joint in which a one end large-diameter opening portion is retained to an outer peripheral surface of a socket, the other end small-diameter opening portion is constructed by a tube portion fitted and fixed onto an outer peripheral surface of a shaft, and an outward flange portion extending diametrically outward from an end portion in the socket side of the tube portion, and the dust cover is retained onto a L-shaped hard retainer, a reinforcing ring of the other end small-diameter opening portion is constructed by a cylindrical portion and an inward flange portion extending toward an outer peripheral surface of the retainer from an end portion in the knuckle side of the cylindrical portion, and an end portion in the socket side of the cylindrical portion in the reinforcing ring comes into contact with the outward flange portion of the retainer.Type: ApplicationFiled: June 3, 2014Publication date: April 14, 2016Inventors: Tatsuro HOSEN, Koji KANAGAWA
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Patent number: 9254867Abstract: In a dust cover for a ball joint, a reinforcing ring is buries in a shaft side attaching portion closely fitted and fixed to an outer peripheral surface of a shaft portion of a ball stud in the ball joint, and an inner peripheral collar portion is formed in an inner peripheral portion of the reinforcing ring, the inner peripheral collar portion having a slightly larger inner diameter than an inner peripheral surface of the shaft side attaching portion. One sealing projection and the other sealing projection are alternately formed in the inner peripheral surface of the shaft side attaching portion, the one sealing projection being arranged at a position in an inner periphery of the inner peripheral collar portion of the reinforcing ring, and the other sealing projection being arranged at a position deviated from the inner periphery of the inner peripheral collar portion.Type: GrantFiled: August 2, 2013Date of Patent: February 9, 2016Assignee: NOK CorporationInventors: Tatsuro Hosen, Junichi Ishimori
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Publication number: 20150337893Abstract: An object of the invention is to provide a dust cover for a ball joint which can suppress generation of a so-called mouth opening phenomenon in a small-diameter opening portion even under a low-temperature atmosphere, can effectively inhibit a seal performance from being lowered in the small-diameter opening portion and inhibit the sedimentation or the garbage from entering into a dust cover from an external portion, and has a good sealing performance. For this purpose, in a dust cover for a ball joint having a spherical head portion, a shaft, one end large-diameter opening portion, the other end small-diameter portion, and a film portion, concavo-concave engagement is formed between an inner peripheral surface of the rigid ring and an outer peripheral surface of a retainer having a cylindrical portion which is fitted and retained to an outer peripheral surface of the shaft.Type: ApplicationFiled: November 11, 2013Publication date: November 26, 2015Applicant: NOK CORPORATIONInventors: Tatsuro HOSEN, Takayoshi IWASAKA
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Publication number: 20150300502Abstract: The purpose of the present invention is to provide a ball joint dust cover that has favorable sealing functionality and, in a low temperature environment, can suppress the occurrence of the so-called small diameter opening part opening-phenomenon, and can effectively prevent reduction in the sealing functionality of the small diameter opening part and infiltration from the outside of gravel and dust into the dust cover. In order to achieve the foregoing, provided is a ball joint dust cover made of a rubbery elastic material and provided with a one-end small diameter opening part with which a hard ring is formed integrally, wherein the hard ring is sandwiched by a retainer having a three-sided box shaped gasket.Type: ApplicationFiled: September 13, 2013Publication date: October 22, 2015Inventor: Tatsuro HOSEN
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Publication number: 20150210314Abstract: In a dust cover for a ball joint, a reinforcing ring is buries in a shaft side attaching portion closely fitted and fixed to an outer peripheral surface of a shaft portion of a ball stud in the ball joint, and an inner peripheral collar portion is formed in an inner peripheral portion of the reinforcing ring, the inner peripheral collar portion having a slightly larger inner diameter than an inner peripheral surface of the shaft side attaching portion. One sealing projection and the other sealing projection are alternately formed in the inner peripheral surface of the shaft side attaching portion, the one sealing projection being arranged at a position in an inner periphery of the inner peripheral collar portion of the reinforcing ring, and the other sealing projection being arranged at a position deviated from the inner periphery of the inner peripheral collar portion.Type: ApplicationFiled: August 2, 2013Publication date: July 30, 2015Inventors: Tatsuro Hosen, Junichi Ishimori