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11. 发明公开

US20230392665A1 SEALING DEVICE 审中-公开
公开(公告)号：US20230392665A1
公开(公告)日：2023-12-07
申请号：US18033740
申请日：2021-10-15
申请人： NOK CORPORATION
发明人： Tatsuya MORI , Yu YAMAGUCHI , Masamichi KISHIRO , Toshiaki YAMAUCHI
IPC分类号： F16F9/36 , F16J15/18 , F16J15/3232
CPC分类号： F16F9/36 , F16J15/18 , F16J15/3232 , F16F2230/30
摘要： A sealing device includes a seal housing disposed between a cylinder and a rod, an inner seal disposed between the rod and the seal housing, the inner seal being in contact with the rod, and an outer seal disposed between the inner seal and the seal housing, the outer seal being in contact with both the inner seal and the seal housing, in which one of the outer seal and the seal housing has a contact face that is in contact with the other of the outer seal and the seal housing, and the contact face has a concave portion.

12. 发明授权

US11835136B2 Sealing device 有权
公开(公告)号：US11835136B2
公开(公告)日：2023-12-05
申请号：US17439704
申请日：2020-04-15
申请人： NOK CORPORATION
发明人： Toshiki Watanabe , Kokichi Hamamoto , Tomoaki Nishimura , Masayuki Tanida
IPC分类号： F16J15/3232
CPC分类号： F16J15/3232
摘要： A sealing device capable of suppressing depletion of lubricant is provided. A sliding surface of a side lip 220 at a position away from a distal end of the side lip 220 is provided with a plurality of annular grooves 222 adjacent each other, each of all parts that form annular protrusions 223 between adjacent annular grooves 222 protrudes most at a center in a width direction thereof, with an amount of protrusion gradually decreasing with increasing separation from the center, and both sides of the center in the width direction are symmetric in shape. A tip portion of the sliding surface of the side lip 220 on the distal side of a region, which is provided with the plurality of annular grooves 222, is configured to make a planar contact with an end face of the annular member.

13. 发明授权

US11781653B2 Sealing device 有权
公开(公告)号：US11781653B2
公开(公告)日：2023-10-10
申请号：US17059152
申请日：2019-07-02
申请人： NOK CORPORATION
发明人： Takumi Yamada , Hiromi Sugihara , Hisato Yonai , Toshiki Watanabe , Satoshi Yamanaka , Yu Yamaguchi
IPC分类号： F16J15/18 , F16J15/3232 , F16J15/324 , F16C19/36 , F16C33/78
CPC分类号： F16J15/18 , F16J15/324 , F16J15/3232 , F16C19/36 , F16C33/78
摘要： A sealing device includes a reinforcing ring having annular shape around an axis line and an elastic body part formed from an elastic body, the elastic body part being attached to the reinforcing ring and having an annular shape around the axis line. The elastic body part includes an annular seal lip and an annular side lip that is provided on an outer side of the seal lip and that extends toward the outer side. In an inner peripheral surface of the side lip on an inner periphery side, at least one circumferential groove which is a groove having an annular shape around the axis line is provided and at least one axial groove which is a groove extending along a direction of the axis line is provided. The circumferential groove and the axial groove are connected with each other.

14. 发明授权

US11773980B2 Sealing device 有权
公开(公告)号：US11773980B2
公开(公告)日：2023-10-03
申请号：US17603986
申请日：2020-04-15
申请人： NOK CORPORATION
发明人： Yuto Manaka
IPC分类号： F16J15/3204
CPC分类号： F16J15/3204
摘要： Provided is a sealing device capable of exhibiting a screw pumping effect in an early stage while inhibiting leakage of a fluid to be sealed by providing thread protrusions. A second inclined surface is provided with a plurality of first thread protrusions that cause a fluid to be sealed to flow toward a region to be sealed when the seal lip rotates in one direction relative to a shaft, and a plurality of second thread protrusions that cause the fluid to be sealed to flow toward the region to be sealed when the seal lip rotates in another direction relative to the shaft. In a state before progress of sliding wear on the seal lip, a sidewall of each of the first thread protrusions on a side facing the region to be sealed and a sidewall of each of the second thread protrusions on the side facing the region to be sealed are both designed to be parallel to a center axis line of the shaft in a state in which the seal lip is in contact with a surface of the shaft.

15. 发明授权

US11762306B2 Electroconductive roll 有权
公开(公告)号：US11762306B2
公开(公告)日：2023-09-19
申请号：US17258583
申请日：2019-08-29
申请人： NOK CORPORATION
发明人： Kousuke Oura , Shogo Suzuki , Satoshi Fukuoka , Kenji Sasaki
IPC分类号： G03G15/02 , G03G5/04
CPC分类号： G03G5/04
摘要： An electroconductive roll includes a core member, a rubber base material disposed around the core member, and a surface layer disposed around the rubber base material. The arithmetic mean peak curvature Spc of a surface of the surface layer is equal to or greater than 1,880 (1/mm), and is equal to or less than 14,024 (1/mm).

16. 发明授权

US11739791B2 Ball joint and dust cover 有权
公开(公告)号：US11739791B2
公开(公告)日：2023-08-29
申请号：US16975474
申请日：2019-09-30
申请人： NOK CORPORATION
发明人： Keisuke Nakagawa
IPC分类号： F16C11/06
CPC分类号： F16C11/0671 , Y10T403/31
摘要： A ball joint and a dust cover in which a stable sealing function can be provided even when a space for disposing the dust cover is small are provided. The dust cover includes a deformable body portion, a fixed portion which is provided on one end side of the body portion and is fixed to a socket, and a seal portion provided on the other end side of the body portion. The seal portion has a main seal part which is provided to be slidable relative to a spherical portion side flange and an opposite side flange while sandwiched therebetween. The maximum length of the main seal part in a central axis direction in a state in which no external force is applied thereto is longer than a distance between opposing surfaces of the spherical portion side flange and the opposite side flange, where the central axis direction is a direction in which a central axis of the dust cover extends in a state in which no external force is applied thereto.

17. 发明授权

US11714364B2 Charging roll 有权
公开(公告)号：US11714364B2
公开(公告)日：2023-08-01
申请号：US17630546
申请日：2019-08-29
申请人： NOK CORPORATION
发明人： Kosuke Oura , Shogo Suzuki , Satoshi Hukuoka , Kenji Sasaki
IPC分类号： G03G15/02 , G03G15/08 , G03G15/16 , G03G15/00 , F16C13/00
CPC分类号： G03G15/0233 , G03G15/0808 , G03G15/0818 , G03G15/1685 , F16C13/00 , G03G15/00 , G03G2215/1614
摘要： An electroconductive roll includes a core member, a rubber base material disposed around the core member, and a surface layer disposed around the rubber base material. The arithmetic mean peak curvature Spc of a surface of the surface layer is equal to or greater than 1,880 (1/mm), and is equal to or less than 14,024 (1/mm) The density of peaks Spd of the surface of the surface layer is equal to or greater than 93,406 (1/mm2), and is equal to or less than 151,476 (1/mm2). The surface area of the surface layer per unit projected area is equal to or greater than 1.255, and is equal to or less than 5.132.

18. 发明公开

US20230228314A1 Damping Stopper 审中-公开
公开(公告)号：US20230228314A1
公开(公告)日：2023-07-20
申请号：US18187973
申请日：2023-03-22
申请人： NOK CORPORATION
发明人： Yuki HANADA
IPC分类号： B62D7/22 , B62D3/12 , F16F1/44 , F16F1/371 , F16F1/373
CPC分类号： B62D7/226 , B62D3/123 , F16F1/445 , F16F1/3713 , F16F1/3732
摘要： A damping stopper is interposed between two members axially displaced relative to each other and is provided with an elastic body which, when the interval between the two members decreases, is axially compressed by the two members and expands radially outward. In the elastic body, a second member suppressing the expansion is located in one axial region and attached to the outer periphery. When axially compressed by the two members, the elastic body expands while receiving resistance by the second member. The expanding elastic body contacts the side wall of one of the two members.

19. 发明公开

US20230221661A1 DEVELOPING ROLL 审中-公开
公开(公告)号：US20230221661A1
公开(公告)日：2023-07-13
申请号：US17927443
申请日：2021-03-16
申请人： NOK CORPORATION
发明人： Kosuke OURA , Atsushi IKEDA , Satoshi FUKUOKA , Kenji SASAKI
IPC分类号： G03G15/08
CPC分类号： G03G15/0808 , G03G15/0818
摘要： A developing roll has a metal core, an elastic layer, and a surface layer, A value X is 65.6 N/mm3 or more and a value Y is 229 μm or more. The value X is P1/(D2×A) P2/(D2× A). P1 is the load to displace the roll by 100 μm when a metal probe is pressed against the roll. D1 is the displacement of the roll caused by the probe under the load P1. A is the area of the probe. P2 is the load to displace a material roll by 100 μm when the probe is pressed against the material roll with the core and the elastic layer and without the surface layer. D2 is the displacement of the material roll caused by the probe under the load P2. The value Y is the displacement of the developing roll when the probe pierces the surface layer.

20. 发明公开

US20230167904A1 SEALING DEVICE 审中-公开
公开(公告)号：US20230167904A1
公开(公告)日：2023-06-01
申请号：US17922112
申请日：2021-05-24
申请人： NOK CORPORATION
发明人： Toshiki WATANABE , Tomoyuki NUMATA
IPC分类号： F16J15/3212
CPC分类号： F16J15/3212
摘要： A sealing device is disposed between a rotational shaft and an inner surface of a housing. The sealing device includes a mounted part mounted on the housing; an annular part extending radially inward from the mounted part; an inner cylindrical part supported by the annular part; a seal lip protruding radially inward from the inner cylindrical part, the seal lip brought into slidable contact with the rotational shaft; and a garter spring wound around the inner cylindrical part to compress the seal lip against the rotational shaft. The distance between the boundary between the inner cylindrical part and the annular part and the lip edge of the seal lip along the axial direction of the rotational shaft is equal to or greater than 4 mm. The garter spring applies a force that is equal to or greater than 22 N to the inner cylindrical part.

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