公开(公告)号：US20220221024A1

公开(公告)日：2022-07-14

申请号：US17607916

申请日：2020-01-31

Applicant: BRIDGESTONE CORPORATION

Inventor： Kazutaka OTSU

IPC: F16F13/28 ,  F16F13/14

Abstract: A liquid seal bushing includes an outer member, an inner member, and an elastic body which connects the outer member and the inner member to each other. The bushing includes two liquid chambers, a connection path which connects the two liquid chambers and extends in one direction, a first communication path which allows communication between one end portion of both end portions of the connection path, the one end portion being located on a side of one liquid chamber of the two liquid chambers, and the other liquid chamber, a second communication path which allows communication between the other end portion of the both end portions of the connection path, and a linear motor provided inside the outer member including a movable element in the connection path and movable in the one direction to closes both openings of the first communication path and the second communication path.

公开(公告)号：US20200269646A1

公开(公告)日：2020-08-27

申请号：US16646373

申请日：2018-10-10

Applicant: BRIDGESTONE CORPORATION

Inventor： Kazutaka OTSU ,  Syogo TSUJI

IPC: B60G13/00 ,  F16F3/093 ,  F16F9/54

Abstract: The active damper upper mount includes an inner member (11, 111) to which an upper end portion of a rod (22, 122) of an active damper (21, 121) is fixed, an intermediate member (12, 112) that surrounds the inner member in a circumferential direction around a rod axis (O1, O2), an outer member (13, 113) that surrounds the intermediate member in the circumferential direction and is attached to a vehicle body side, a first elastic body (14, 114) that is disposed between the inner member and the intermediate member and supports the inner member and the intermediate member so as to be elastically displaceable relative to each other, and a second elastic body (15, 115) that is disposed between the intermediate member and the outer member and supports the intermediate member and the outer member so as to be elastically displaceable relative to each other.

公开(公告)号：US20220032703A1

公开(公告)日：2022-02-03

申请号：US17299183

申请日：2019-07-19

Applicant: BRIDGESTONE CORPORATION

Inventor： Kazutaka OTSU

IPC: B60G7/02 ,  F16F13/10 ,  F16F13/14

Abstract: A toe correction bushing including: an inner cylinder; a tubular damping mechanism which surrounds the inner cylinder; a retaining cylinder which surrounds the damping mechanism; an outer cylinder which surrounds the retaining cylinder; and an outer elastic body which connects the outer cylinder and the retaining cylinder. The retaining cylinder includes a bottom plate portion which extends inward in a radial direction from an end portion of the retaining cylinder on one side of an axial direction and a crimped portion which is located at an end portion on the other side of the axial direction and is crimped on the inside of the radial direction. The outer cylinder includes a facing surface which faces the one side of the axial direction and faces a part of a vehicle body. The facing surface is provided with a cushioning elastic body.

公开(公告)号：US20210387493A1

公开(公告)日：2021-12-16

申请号：US17292198

申请日：2019-12-04

Applicant: BRIDGESTONE CORPORATION

Inventor： Kazutaka OTSU ,  Musashi HASHIMOTO

IPC: B60G11/16 ,  F16F1/38 ,  F16F9/54

Abstract: A strut mount includes an inner member, an outer member, and a body rubber. A stopper rubber which protrudes outward in an axial direction is disposed on the body rubber. The outer member includes a supporting portion which covers the stopper rubber from outside thereof in the axial direction. The stopper rubber includes a pedestal protrusion portion which protrudes outward in the axial direction from the inner member and a tip protrusion portion which protrudes outward in the axial direction from the pedestal protrusion portion, contacts the supporting portion, and has an elasticity in the axial direction lower than that of the pedestal protrusion portion. The pedestal protrusion portion and the tip protrusion portion taper outward in the axial direction.

公开(公告)号：US20220282764A1

公开(公告)日：2022-09-08

申请号：US17637619

申请日：2020-08-27

Applicant: BRIDGESTONE CORPORATION

Inventor： Masaki HOSODA ,  Kazutaka OTSU

IPC: F16F13/14 ,  F16F1/38 ,  F16F13/10

Abstract: In a liquid sealing bush, in an outer peripheral surface (13os) of an intermediate tube (13), a main seal protrusion portion (23) extending over an entire length in a circumferential direction and pressed against an inner peripheral surface (11is) of an outer tube (11) is separately provided at each position sandwiching a liquid chamber (15) and an orifice passage (16) from both sides in an axial direction, and in the outer peripheral surface (13os) of the intermediate tube (13), an outer seal protrusion portion (22) extending over the entire length in the circumferential direction and pressed against the inner peripheral surface (11is) of the outer tube (11) is separately provided at each position sandwiched between two main seal protrusion portions (23) in the axial direction and sandwiching the liquid chamber (15) and the orifice passage (16) from both sides in the axial direction, in which, in at least one of two outer seal protrusion portions (22), a recessed portion (24) recessed inward in a radial direction and penetrating in the axial direction is formed in a portion separated from the liquid chamber (15) in the circumferential direction.

公开(公告)号：US20210087368A1

公开(公告)日：2021-03-25

申请号：US16772010

申请日：2018-12-11

Applicant: BRIDGESTONE CORPORATION

Inventor： Nahoko ITO ,  Yasuo HORIKAWA ,  Kei KIMURA ,  Kazutaka OTSU

IPC: C08L9/06 ,  F16F15/08

Abstract: The antivibration rubber composition of the present invention contains a styrene-butadiene rubber (A) having a polystyrene-equivalent weight-average molecular weight of 700,000 or more, and a liquid styrene-butadiene rubber (B) having a polystyrene-equivalent weight-average molecular weight of 12,000 or less, wherein the total amount of the vinyl bond content in the rubber (A) and the vinyl bond content in the liquid rubber (B) relative to the total amount of the rubber (A) and the liquid rubber (B) is 25% by mass or more. The antivibration rubber using the composition exhibits ultra-low spring property and high durability.