公开(公告)号：US11905954B2

公开(公告)日：2024-02-20

申请号：US17546556

申请日：2021-12-09

Applicant: KABUSHIKI KAISHA TOYOTA JIDOSHOKKI ,  NOK CORPORATION

Inventor： Tatsushi Mori ,  Shintaro Kashiwa ,  Daisuke Masaki ,  Kenichi Yoshimura

IPC: F04C18/12 ,  F04C15/00 ,  F04C2/08 ,  F04C27/00 ,  F04C28/24 ,  F04C18/08 ,  F04C29/00 ,  F04C29/02 ,  F04C18/16 ,  F04C25/02 ,  F01C1/12 ,  F01C19/00 ,  F01C1/08

CPC classification number: F04C18/126 ,  F01C1/084 ,  F01C1/126 ,  F01C19/005 ,  F04C2/084 ,  F04C15/0038 ,  F04C18/084 ,  F04C18/086 ,  F04C18/16 ,  F04C25/02 ,  F04C27/00 ,  F04C27/009 ,  F04C28/24 ,  F04C29/005 ,  F04C29/02 ,  F04C2240/30 ,  F04C2240/40 ,  F04C2240/60

Abstract: An electric pump includes a housing that includes a gear chamber, a rotor chamber, and a motor chamber. The electric pump includes a first seal member, a second seal member, and a third seal member. The first seal member seals a space between the gear chamber and the rotor chamber. The second seal member seals the space between the gear chamber and the rotor chamber. The third seal member seals a space between the gear chamber and the motor chamber. The third seal member seals the space between the gear chamber and the motor chamber to a lesser extent than the first seal member and the second seal member seal the space between the gear chamber and the rotor chamber.

公开(公告)号：US10408349B2

公开(公告)日：2019-09-10

申请号：US15557955

申请日：2016-03-11

Applicant: NOK CORPORATION

Inventor： Maiko Miyazaki ,  Yohei Sakai ,  Kenichi Yoshimura ,  Shota Toma

IPC: F16J15/12 ,  F16J15/16 ,  F16J15/3272 ,  F16J15/44

Abstract: A seal ring includes, on a side of a sliding surface thereof, a groove part (120) having a first groove (121) extending in a circumferential direction thereof and a second groove (122) extending from a central position of the first groove (121) in the circumferential direction to an inner peripheral surface and guiding sealed fluid into the first groove (121), the first groove (121) having dynamic pressure generation grooves (121a) configured to have a groove bottom made shallower at an end thereof in the circumferential direction than at a center thereof in the circumferential direction, and a foreign matter catching groove (121b) that has a groove bottom deeper than the groove bottoms of the dynamic pressure generation grooves (121a) and is capable of catching foreign matter, and the first groove (121) being provided at a position that falls within a sliding region in which the seal ring slides on the lateral wall surface.

公开(公告)号：US10605368B2

公开(公告)日：2020-03-31

申请号：US15804171

申请日：2017-11-06

Applicant: NOK CORPORATION

Inventor： Kenichi Yoshimura ,  Yuki Sato ,  Nobuaki Yanagisawa

IPC: F16J15/3232 ,  F16J15/3244 ,  C10M169/02 ,  F02F7/00 ,  F02F11/00 ,  F16J15/324

Abstract: A sealing apparatus sealing a gap between two members mutually relatively rotatable about an axis in an internal combustion engine, the sealing apparatus comprises an elastic body portion. The elastic body portion is an elastic body including an annular attaching portion attached to one of the two members and centered about the axis, and a seal portion in close contact with another of the two members in a manner in which the other of the two members is slidable. The seal portion includes an annular seal lip portion centered about the axis and an annular dust lip centered about the axis on an atmospheric side on an opposite side of a sealed fluid side with respect to the seal lip portion. The seal lip portion includes a lip tip portion which is an annular projecting body projecting toward the axis and grease is applied to the seal lip portion. The grease contains at least one of a synthetic hydrocarbon oil and a mineral oil as a base oil and has a low temperature starting torque of 25 N·cm or less at −30° C.

公开(公告)号：US09505905B2

公开(公告)日：2016-11-29

申请号：US14420595

申请日：2013-07-19

Applicant: NOK CORPORATION

Inventor： Kenichi Yoshimura

IPC: C08K3/34 ,  C08K7/10 ,  C09K3/10

CPC classification number: C08K3/34 ,  C08K7/04 ,  C08K7/10 ,  C08K2201/003 ,  C08K2201/004 ,  C08K2201/016 ,  C09K3/1009 ,  C08L27/16

Abstract: A fluororubber composition comprising 1 to 100 parts by weight of a needle-like filler or fibrous filler having an average particle diameter of 5 μm or less, an average particle length of 40 to 60 μm, and an aspect ratio of 10 to 12, based on 100 parts by weight of fluororubber. A fluororubber vulcanization-molded product obtained from the fluororubber composition has resistance against deformation due to the shape effect of the filler, and thereby can suppress the deformation of the oil seal sliding surface towards the sliding direction. More specifically, the fluororubber vulcanization-molded product can achieve less friction, while maintaining sealing properties by increasing the amount of oil pumping, from the initial use of an oil seal to after the abrasion of the oil seal.

Abstract translation: 一种氟橡胶组合物，其包含1至100重量份的平均粒径为5μm或更小，平均颗粒长度为40至60μm，纵横比为10至12的针状填料或纤维填料，基于 在100重量份的氟橡胶上。 由氟橡胶组合物获得的氟橡胶硫化成型体由于填料的形状效果而具有抗变形性，能够抑制油封滑动面向滑动方向的变形。 更具体地说，氟橡胶硫化成型产品可以实现较少的摩擦，同时通过增加从最初使用油封到油封的磨损之后的抽油量来保持密封性能。

公开(公告)号：US10563767B2

公开(公告)日：2020-02-18

申请号：US15804171

申请日：2017-11-06

Applicant: NOK CORPORATION

Inventor： Kenichi Yoshimura ,  Yuki Sato ,  Nobuaki Yanagisawa

IPC: F16J15/3232 ,  F16J15/3244 ,  C10M169/02 ,  F02F7/00 ,  F02F11/00 ,  F16J15/324

Abstract: A sealing apparatus sealing a gap between two members mutually relatively rotatable about an axis in an internal combustion engine, the sealing apparatus comprises an elastic body portion. The elastic body portion is an elastic body including an annular attaching portion attached to one of the two members and centered about the axis, and a seal portion in close contact with another of the two members in a manner in which the other of the two members is slidable. The seal portion includes an annular seal lip portion centered about the axis and an annular dust lip centered about the axis on an atmospheric side on an opposite side of a sealed fluid side with respect to the seal lip portion. The seal lip portion includes a lip tip portion which is an annular projecting body projecting toward the axis and grease is applied to the seal lip portion. The grease contains at least one of a synthetic hydrocarbon oil and a mineral oil as a base oil and has a low temperature starting torque of 25 N·cm or less at −30° C.

公开(公告)号：US10190689B2

公开(公告)日：2019-01-29

申请号：US15557909

申请日：2016-03-10

Applicant: NOK CORPORATION

Inventor： Yusuke Yoshida ,  Fangman Xu ,  Nozomu Suzuki ,  Norimasa Hosonuma ,  Shigenobu Honda ,  Kenichi Yoshimura ,  Yohei Sakai ,  Shota Toma

IPC: F16J15/34 ,  F16J15/16 ,  F16J15/18 ,  F16J15/3244 ,  F16J15/44

Abstract: A seal ring capable of stably reducing a rotational torque while preventing the leakage of sealed fluid. The seal ring includes: an abutment joint part (110) provided at one portion in a circumferential direction thereof; a plurality of dynamic pressure generation grooves (120) provided at intervals in the circumferential direction on a side of a sliding surface thereof sliding on a lateral wall surface of an annular groove; and foreign matter discharging grooves (130) that are provided between a region in which the plurality of dynamic pressure generation grooves (120) is arranged and the abutment joint part (110) in the circumferential direction on the side of the sliding surface sliding on the lateral wall surface, and that are capable of catching foreign matter intruding from the abutment joint part (110) and discharging the caught foreign matter to an outside of a sliding part between the seal ring and the lateral wall surface.

公开(公告)号：US20150197619A1

公开(公告)日：2015-07-16

申请号：US14420595

申请日：2013-07-19

Applicant: NOK CORPORATION

Inventor： Kenichi Yoshimura

IPC: C08K3/34

CPC classification number: C08K3/34 ,  C08K7/04 ,  C08K7/10 ,  C08K2201/003 ,  C08K2201/004 ,  C08K2201/016 ,  C09K3/1009 ,  C08L27/16

Abstract: A fluororubber composition comprising 1 to 100 parts by weight of a needle-like filler or fibrous filler having an average particle diameter of 5 μm or less, an average particle length of 40 to 60 μm, and an aspect ratio of 10 to 12, based on 100 parts by weight of fluororubber. A fluororubber vulcanization-molded product obtained from the fluororubber composition has resistance against deformation due to the shape effect of the filler, and thereby can suppress the deformation of the oil seal sliding surface towards the sliding direction. More specifically, the fluororubber vulcanization-molded product can achieve less friction, while maintaining sealing properties by increasing the amount of oil pumping, from the initial use of an oil seal to after the abrasion of the oil seal.

Abstract translation: 一种氟橡胶组合物，其包含1至100重量份的平均粒径为5μm或更小，平均粒子长度为40至60μm，纵横比为10至12的针状填料或纤维填料，基于 在100重量份的氟橡胶上。 由氟橡胶组合物获得的氟橡胶硫化成型体由于填料的形状效果而具有抗变形性，能够抑制油封滑动面向滑动方向的变形。 更具体地说，氟橡胶硫化成型产品可以实现较少的摩擦，同时通过增加从最初使用油封到油封的磨损之后的抽油量来保持密封性能。