公开(公告)号：JP2002333072A

公开(公告)日：2002-11-22

申请号：JP2001138027

申请日：2001-05-09

Applicant: KUBOTA KK

Inventor： KITAMURA MASAAKI ,  TSUKAHARA NAOKI

IPC: F16K25/00 ,  F16K1/226

Abstract: PROBLEM TO BE SOLVED: To provide a seat structure for a butterfly valve wherein a valve element seat face and a valve casing seat face are linearly abutted, and the sealing pressure is generated by elastic deformation of a valve casing seat. SOLUTION: The thin cylindrical valve casing seat 31 elastically deformable in the radial direction is concentrically mounted inside of the valve casing 12 at a predetermined interval, the valve element 22 rotated around a shaft center of the valve rod 18 radially inserted into the valve casing 12 and the valve casing seat 31 is mounted inside of the valve casing seat 31, a valve element seat 32 slidably abutted on the valve casing seat 31 is mounted on an outer periphery of the valve element 22, the valve element seat 32 has a valve element seat face 32a formed by an outer peripheral face forming an outwardly curved face on its cross-sectional shape along the radial direction, and has an outer peripheral diameter larger than an inner peripheral diameter of the valve casing seat 31, the valve element seat 32 is linearly abutted on the valve casing seat face 31a of the valve casing seat 31 at its valve element seat face 32a when the valve element 22 is fully closed, and the valve casing seat 31 is elastically deformed outwardly.

公开(公告)号：JP2002105933A

公开(公告)日：2002-04-10

申请号：JP2000302991

申请日：2000-10-03

Applicant: KUBOTA KK

Inventor： KITAMURA MASAAKI

IPC: E02B7/26 ,  F16K3/02 ,  F16K3/314

Abstract: PROBLEM TO BE SOLVED: To provide a sheet structure for a regulating door capable of easily forming a sheet and also easily preventing the sheet from being dropped out. SOLUTION: A sheet member 22 is integrally cast in the base material 21 for a door body and a door stopping body and the sheet member 22 is constituted of a composite member in which the first metallic member 23 forming a base material in which the sheet member 22 is cast in the base material 21 and the second metallic material 24 is stuck together.

公开(公告)号：JPH11166648A

公开(公告)日：1999-06-22

申请号：JP33071497

申请日：1997-12-02

Applicant: KUBOTA KK

Inventor： KITAMURA MASAAKI

IPC: F16K24/00

Abstract: PROBLEM TO BE SOLVED: To ordinarily provide a discharge function of air in a pipe, enable the suction of the large amount of outdoor air in the case of needing discharge of in-pipe water, make air suction intentionally stoppable in reverse in the case of requrring the large amount of intake water, and easily execute this operation even in an existing air valve, in an air valve. SOLUTION: In an air valve 1 enabling a supply/exhaust port 4 to open/close by a float valve 3 supported able to be lifted by a guide 3A in a valve casing 2 and with, for instance, a mushroom-shaped cover 5 provided in an opening of the supply/exhaust port 4, a slide shaft 6 able to engage/disengage one end 6A in the float valve 3 of the air valve 1 is supported to the cover 5 by arranging in order an axial line in a lift direction of the float valve 3, and the slide shaft 6 is formed to be energized always in an up-direction by, for instance, a spring 7.

公开(公告)号：JP2566649B2

公开(公告)日：1996-12-25

申请号：JP10203089

申请日：1989-04-21

Applicant: KUBOTA KK

Inventor： KITAMURA MASAAKI

IPC: F16K24/04

公开(公告)号：JPH08135824A

公开(公告)日：1996-05-31

申请号：JP27079294

申请日：1994-11-04

Applicant: KUBOTA KK

Inventor： KITAMURA MASAAKI

IPC: F16K24/04

Abstract: PURPOSE: To dispense with parts such as a holding member for mounting a valve seat and easily mount the valve seat by forming an annular enlarged diameter stage to fit the valve seat therein in the opening edge of an exhaust hole in an air valve and press fit the valve seat in the enlarged diameter stage. CONSTITUTION: A valve casing 1 is formed in the inside with a float chamber and in the upper part with an exhaust hole 3 communicating to the float chamber and the outside. A floating valve element for opening and closing the exhaust hole 3 is provided in the float chamber wherein an annular enlarged diameter stage 13 to fit a valve seat 12 with a square section is formed in the opening edge of the exhaust hole 3. Also, the valve seat 12 is formed of an annular rubber member 15 made of an elastic body and a metallic core material 16 with the same square section inserted in the rubber member 15 over the circumferential direction. The rubber member 15 of the valve seat 12 is compressed radially by press fitting the valve seat 12 in the enlarged diameter stage 13 to surely hold the valve seat 12 slastically in the enlarged diameter stage 13.

公开(公告)号：JPH04210175A

公开(公告)日：1992-07-31

申请号：JP40179190

申请日：1990-12-13

Applicant: KUBOTA KK

Inventor： KITAMURA MASAAKI ,  BABE TOMOKI

IPC: F16K31/53

Abstract: PURPOSE:To automatically change gears by combining a gear which is axially moved in a direction corresponding to that of rotation of a handle shaft, an epicyclic gear mechanism, and a cam clutch. CONSTITUTION:To close a gate, a handle shaft 24 is rotated in the direction indicated by the white arrow and then a second gear 29 is driven and rotated via a first gear 28 and is threadably engaged in the thread portion 31 of a shaft 30 and is therefore displaced axially backward and pressed into contact with a disc 32 via a frictional plate 34, and an one-way cam clutch 44 is off in the direction of this rotation and an epicyclic gear mechanism 36 is not actuated and torque is directly transmitted to an output shaft 27. To open the gate, the handle shaft 24 is rotated in the direction indicated by the black arrow and then the second gear 29 is rotated via the first gear 28 as well as displaced axially forward by the thread portion 31 and pressed into contact with a disc 33 via the frictional plate 34 and then the shaft 30 is rotated and a sun gear 40 is rotated. The one-way cam clutch 44 is on in the direction of this rotation and torque is transmitted to the output shaft 27 via an epicyclic gear 41 and a carrier 41.

公开(公告)号：JPH0460246A

公开(公告)日：1992-02-26

申请号：JP16758190

申请日：1990-06-26

Applicant: KUBOTA KK

Inventor： KITAMURA MASAAKI ,  BABE TOMOKI

IPC: F16H15/16

Abstract: PURPOSE:To automatically change speed steplessly without high-priced parts and electrical control by displacing a speed change ring in its axial direction using a cam having an inclined face at the end surface and a spring for displacing the cam according to the load of an output shaft. CONSTITUTION:During no-load of an output shaft 26, a bearing 40 is forced to press an inclined face 4a by a spring 45 to clamp a portion of a cam 39, which has the minimum axial thickness, to support the cam. The output shaft 26 can be rotated at high speed by suitably setting the positional relationship of a speed change ring 38 to a cone 32. When load is applied to the output shaft, the rotating force is transmitted from the cone 32 to the speed change ring 38 to produce the rotating force in the cam 39, and the inclined face 49 displaces the bearing 40 against the spring 45 to rotate the cam 39, so that the cam is displaced in the axial direction to attain a suitable speed change ratio. When the load torque is decreased, the cam 39 is quickly returned to the position of the minimum speed change ratio by the force of a return spring 50.

公开(公告)号：JPH02283978A

公开(公告)日：1990-11-21

申请号：JP10202989

申请日：1989-04-21

Applicant: KUBOTA KK

Inventor： KITAMURA MASAAKI

IPC: F16K24/04

Abstract: PURPOSE:To prevent an exhaust port from being closed by a floating valve during the period of time for exhausting a plenty of air by providing a plurality of air vent holes for the circumference of the inlet port of a float ih the air valve equipped with the floating valve which opens/closes the air vent holes by vertically moving the float. CONSTITUTION:A plurality of air vent holes 14 is provided for the circumferential section of the air inlet port 13 of a float 2. When fluid in a pipe line does not flow in a valve box 1, an exhaust port 10 is opened by a float valve 3 with the float 2 moved down so that a plenty of air in the pipe line is exhansted out to atmosphere. When fluid in the pipe line flows in the valve box 1, the float valve 3 is pressed onto the exhaust port 10 with the float 2 raised up, the overflow of fluid to atmosphere is thereby prevented. when a plenty of air is exhausted with the float 2 lowered, air sometime flows into a gap between the lower surface of the float 2 and the bottom section of a lower valve box 7, an air vent hole 14 however sets said air free above the float 2. By this constitution, the floating valve 3 thereby will never close the exhaust port 10 while the float 2 is raised upward by air pressure.

公开(公告)号：JP2003120829A

公开(公告)日：2003-04-23

申请号：JP2001316128

申请日：2001-10-15

Applicant: KUBOTA KK ,  JAPAN WATER WORKS ASS

Inventor： ISHII KENEI ,  SATO KEIICHI ,  KITAMURA MASAAKI ,  HOURAI AKINOBU

IPC: F16K1/22 ,  F16K47/02

Abstract: PROBLEM TO BE SOLVED: To provide a butterfly valve with a constant-flow flooding function capable of providing the water flow of a constant flow rate with a small opening. SOLUTION: This butterfly valve is composed of a valve casing sealing ring 14 annularly mounted along an inner peripheral face of a valve casing 11, a valve element rotating around a shaft center of a valve rod 13 and slidably abutted on the valve casing seal ring 14 at a fully-closed position, and a disc tail part 15 mounted at a back face side of the valve element 12 in the rotating direction in opening operation. An outer peripheral face slidably abutted on the valve casing seal ring 14, of the disc tail part 15 is curved in the spherical shape, and provided with a water passage hole 17 opened to an outer peripheral face at its one end and opened to the back face side of the valve element 12 at the other end, and a part at the back face side with respect to the opening of the water passing hole 17, of the outer peripheral face is used a seal part 18 slidably abutted on the valve casing seal ring 14 in small opening.

公开(公告)号：JP2002349737A

公开(公告)日：2002-12-04

申请号：JP2001154720

申请日：2001-05-24

Applicant: KUBOTA KK

Inventor： TAJIRI KAZUMI ,  KITAMURA MASAAKI

IPC: F16L55/07 ,  F16K24/04 ,  F16K47/02

Abstract: PROBLEM TO BE SOLVED: To provide an air valve that can prevent a malfunction of a valve element by suppressing an adverse effect on a float of an inflow of bubbles in a valve casing and suppressing generation of splash and dust scatter. SOLUTION: The air valve comprises the valve casing 5 having an inflow opening 5A at a connection to piping in a lower part and having a valve seat 4 in which an exhaust hole 3 is formed in an upper part, the valve element 6 for opening and closing the exhaust hole 3, and the float 11 disposed in the valve casing to press the valve element 6 in the closing direction by means of buoyancy. A plate 21 as a damping member is disposed under the float 11 and in opposition to the inflow opening 5A.