公开(公告)号：US11746937B2

公开(公告)日：2023-09-05

申请号：US16981872

申请日：2019-03-19

Applicant: KUBOTA CORPORATION

Inventor： Shozo Kishi ,  Kazuya Ito ,  Kazuma Harada ,  Keita Oda ,  Ryunosuke Tanaka ,  Kohei Ikeda ,  Yuito Komaru

IPC: F16L21/04 ,  F16L21/03 ,  F16L21/08

CPC classification number: F16L21/04 ,  F16L21/03 ,  F16L21/08

Abstract: A pipe joint in which a seal body and a spacer are mounted from the insides of pipes, wherein: a spigot of one pipe is inserted into a socket of the other pipe; and an annular accommodation space is formed between the inner circumference of the socket and the outer circumference of the spigot. Inside the accommodation space are accommodated: a seal body for sealing the gap between the socket and the spigot; a push ring that presses the seal body to keep the seal body in a compressed state; and a spacer that maintains the interval between the push ring and the deep end of the socket in the pipe axial direction.

公开(公告)号：US12092244B2

公开(公告)日：2024-09-17

申请号：US17769372

申请日：2020-10-05

Applicant: KUBOTA CORPORATION

Inventor： Shozo Kishi ,  Keita Oda ,  Ryunosuke Tanaka

IPC: F16L21/04 ,  F16L21/08 ,  F16L57/02

CPC classification number: F16L21/08 ,  F16L21/04 ,  F16L57/02

Abstract: In a pipe joint, a spigot is inserted into a socket; a lock ring is accommodated in a lock ring-accommodating groove formed in the inner circumference of the socket; and an engaging part formed in the outer circumference of the spigot, wherein the engaging part engages with the lock ring from a back side of the socket in a separation direction A of the spigot, thereby preventing the spigot from separating from the socket. The engaging part is formed at a position receding from a distal end of the spigot in the separation direction A of the spigot. A bending suppressing member for restricting the socket and the spigot in a bending direction C is provided between the inner circumference of the socket and the outer circumference of the spigot in the range between the distal end of the spigot and the engaging part.

公开(公告)号：US10738919B2

公开(公告)日：2020-08-11

申请号：US15987246

申请日：2018-05-23

Applicant: KUBOTA CORPORATION

Inventor： Shozo Kishi ,  Takaaki Kagawa ,  Keita Oda

IPC: F16L21/04 ,  F16L47/08 ,  F16L27/08 ,  F16L27/12 ,  F16L21/03 ,  F16L23/024 ,  F16L23/032 ,  F16L37/084 ,  F16K3/30 ,  F16L21/08 ,  F16J15/02 ,  F16K27/00 ,  F16L23/16 ,  F16L23/22

Abstract: A first projection is formed on the outer periphery of a bulb part, a second projection is formed on the socket rear end of the bulb part, a tapered part is formed with a decreasing diameter from the inner periphery of a heel part to the inner periphery of the second projection, and a third projection is formed on the tapered part. A first dimension B from the first projection to the third projection in an inclination direction opposite to an inclination direction G of the tapered part is smaller than a second dimension C from the first projection to the second projection in a radial direction A.

公开(公告)号：US12013060B2

公开(公告)日：2024-06-18

申请号：US17769099

申请日：2020-10-05

Applicant: KUBOTA CORPORATION

Inventor： Shozo Kishi ,  Keita Oda ,  Ryunosuke Tanaka

IPC: F16L21/08 ,  F16L21/035 ,  F16L21/04

CPC classification number: F16L21/08 ,  F16L21/035 ,  F16L21/04

Abstract: A ring body to be provided in a pipe joint which can prevent a spigot from separating from a socket by a spigot protrusion engaging with a lock ring from the back side of the socket in the separation direction A of the spigot. The ring body includes a main body part which is inserted into between the inner peripheral surface of the socket and the outer peripheral surface of the spigot to be provided in the pipe joint, and a deviation prevention member that prevents the main body part from deviating to the opening end side of the socket, wherein the main body part moves the spigot in the pipe radial direction with respect to the socket, thereby reducing deviation in the pipe radial direction between the pipe axis of a first pipe and the pipe axis of a second pipe.

公开(公告)号：US11333278B2

公开(公告)日：2022-05-17

申请号：US16722434

申请日：2019-12-20

Applicant: KUBOTA CORPORATION

Inventor： Shozo Kishi ,  Keita Oda ,  Ryunosuke Tanaka ,  Hideki Nakaya

IPC: F16L25/08 ,  F16L25/06

Abstract: A pipe-joining centering device aligns, with an axial center of one pipe, an axial center of another pipe when a spigot of the other pipe is to be inserted into a socket of the one pipe. The pipe-joining centering device includes a support member configured to support an end part of the spigot. The support member is tiltable in a pipe radial direction between an inner peripheral surface of the socket and an outer peripheral surface of the spigot. The pipe-joining centering device also includes a position adjustment member configured to tilt the support member in the pipe radial direction. The support member and the position adjustment member are supported on the inner peripheral surface of the socket.

公开(公告)号：USD985741S1

公开(公告)日：2023-05-09

申请号：US35512846

申请日：2021-04-30

Applicant: KUBOTA CORPORATION

Designer： Ryunosuke Tanaka ,  Keita Oda

Abstract: 1. Gland for pipe joints
2. Gland for pipe joints
3. Gland for pipe joints
4. Gland for pipe joints
5. Gland for pipe joints
6. Gland for pipe joints
1.1 : Perspective
1.2 : Rear perspective view
1.3 : Front
1.4 : Back
1.5 : Left
1.6 : Top
1.7 : Cross sectional
1.8 : Enlarged
2.1 : Perspective
2.2 : Rear perspective view
2.3 : Front
2.4 : Back
2.5 : Left
2.6 : Top
2.7 : Cross sectional
2.8 : Enlarged
3.1 : Perspective
3.2 : Rear perspective view
3.3 : Front
3.4 : Back
3.5 : Left
3.6 : Top
3.7 : Bottom
3.8 : Cross sectional
3.9 : Enlarged
4.1 : Perspective
4.2 : Rear perspective view
4.3 : Front
4.4 : Back
4.5 : Left
4.6 : Top
4.7 : Cross sectional
4.8 : Enlarged
5.1 : Perspective
5.2 : Rear perspective view
5.3 : Front
5.4 : Back
5.5 : Left
5.6 : Top
5.7 : Cross sectional
5.8 : Enlarged
6.1 : Perspective
6.2 : Rear perspective view
6.3 : Front
6.4 : Back
6.5 : Left
6.6 : Top
6.7 : Bottom
6.8 : Cross sectional
6.9 : Enlarged
The article is a gland for pipe joints used for joining cast iron pipes for water supply; the right views of designs 1 to 6 are omitted because they are mirror images of the left views (Figs. 1.5, 2.5, 3.5, 4.5, 5.5, 6.5) respectively; the bottom views of designs 1, 2, 4, and 5 are omitted because they are mirror imaqes of the top views (Figs.1.6, 2.6, 4.6, 5.6) respectively; Figs. 1.7, 2.7, 3.8, 4.7, 5.7, 6.8 are cross-sectional views taken along the A-A′ line shown in the front views (Figs. 1.3, 2.3, 3.3, 4.3, 5.3, 6.3) respectively; Figs. 1.8, 2.8, 3.9, 4.8, 5.8, 6.9 are enlarged views of the B-B′ portion shown in the cross-sectional views (Figs. 1.7, 2.7, 3.8, 4.7, 5.7, 6.8).

公开(公告)号：US10443772B2

公开(公告)日：2019-10-15

申请号：US15028539

申请日：2014-09-29

Applicant: KUBOTA CORPORATION

Inventor： Shozo Kishi ,  Takaaki Kagawa ,  Keita Oda ,  Yuito Komaru

IPC: F16L1/09 ,  F16L37/088 ,  E03F3/06 ,  F16L1/10 ,  F16L21/08 ,  F16J15/06 ,  G01N21/95

Abstract: A pipe joint structure provided with: a heel section configured so that a spigot formed on the end section of a pipe is inserted via a seal member into a socket formed in the end section of another pipe and seal member is fitted to a recessed section formed on the inner circumferential section of the socket; and a valve section compressed between the inner circumferential surface of the socket and the outer circumferential surface of the spigot. Additionally, a marker member is provided to the heel section that is accommodated in the recessed section. The socket circumference section of the pipe joint structure is subjected to non-contact inspection by a marker detection device from the spigot-side pipe along the axial direction of the pipe and the quality of the joining state of the pipe joint structure is determined on the basis of whether the marker member is detected.

公开(公告)号：US09659112B2

公开(公告)日：2017-05-23

申请号：US14564233

申请日：2014-12-09

Applicant: KUBOTA CORPORATION

Inventor： Shozo Kishi ,  Shogo Kaneko ,  Keita Oda

IPC: F16L21/02 ,  G06F17/50 ,  F16L21/04 ,  F16L27/10 ,  F16L37/088

CPC classification number: G06F17/50 ,  F16L21/04 ,  F16L27/1017 ,  F16L37/088 ,  G06F2217/34

Abstract: There are provided a pipeline structure and a computer readable recording medium having recorded thereon a program that supports the design of the pipeline structure. The pipeline structure includes two collars and a plurality of short pipes. The plurality of short pipes are connected by joint structures. Two collars are arranged to sandwich a zone where a fault displacement is expected to occur, and thereby, a ground displacement in the pipe axis direction is dealt with (absorbed). The plurality of short pipes are connected by the larger number of joints than the number of joints in the case of arranging a long pipe. By increasing the number of joints, it becomes easier to deal with (absorb) a ground displacement in the direction perpendicular to a pipe axis.