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公开(公告)号：US20240044325A1
公开(公告)日：2024-02-08
申请号：US18266922
申请日：2021-09-22
Applicant: Nippon Pillar Packing Co., Ltd.
Inventor： Daisuke URATA , Kazukiyo TESHIMA , Atsufumi KINOSHITA
CPC classification number: F04B45/022 , F04B49/08 , F04B53/1095 , F04B53/1032
Abstract: A control unit 6 of a bellows pump device 1 determines whether or not a second bellows 14 (first bellows 13) is in a predetermined expanded state when the first bellows 13 (second bellows 14) contracts to a mid-contraction state, on the basis of respective detection signals of a first detection unit 29 and a second detection unit 31, and when a determination result of the determination is negative, the control unit 6 performs next pressure increase control of controlling a second electropneumatic regulator 52 (first electropneumatic regulator 51) such that an air pressure of a pressurized air to be supplied to a second suction-side air chamber 26B (first suction-side air chamber 26A) of a second driving unit 28 (first driving unit 27) at next expansion of the second bellows 14 (first bellows 13) is increased.
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公开(公告)号：US20190193315A1
公开(公告)日：2019-06-27
申请号：US16322323
申请日：2017-06-15
Applicant: NIPPON PILLAR PACKING CO., LTD.
Inventor： Masaki MIYAMOTO , Masateru YAMADA , Kazukiyo TESHIMA , Hiroki SAKAMOTO , Toshihide IIDA , Tomoyuki KOIKE , Motoaki NARUO
Abstract: A method for manufacturing a resin pipe joint with a joint body includes the following steps. Preparing a mold and a supply device configured to supply molten resin. The mold includes a first mold for an outer shape of the joint body and a second mold for an inner shape of the joint body. Combining the second mold with the first mold to form a cavity, into which the molten resin is injectable, inside the mold. Supplying the molten resin to the cavity in the mold. Solidifying the molten resin in the cavity after stop of the supply of the molten resin from the supply device. The second mold has a gap that connects the cavity to a discharge space outside the cavity and allows gas to flow.
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公开(公告)号：US20230175621A1
公开(公告)日：2023-06-08
申请号：US17924215
申请日：2021-03-31
Applicant: NIPPON PILLAR PACKING CO., LTD.,
Inventor： Ayumi KUROSAKI , Shingo HIGUCHI , Kazukiyo TESHIMA
IPC: F16L33/22
CPC classification number: F16L33/222 , F16L33/223 , F16L19/07
Abstract: An inner ring 4 of a pipe joint 1 includes a bulge portion 6 formed at an axially outer end portion thereof so as to project toward a radially outer side, and to be press-fitted into an end portion of a tube 8, and has a fluid flow passage 4a formed on a radially inner side of the bulge portion 6. The bulge portion 6 is formed so as to be tapered from an axially inner side toward an axially outer end thereof in an axial cross-sectional view, and has a flat surface 6e formed at the axially outer end thereof and extending in a radial direction.
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公开(公告)号：US20210190064A1
公开(公告)日：2021-06-24
申请号：US16756758
申请日：2018-08-01
Applicant: NIPPON PILLAR PACKING CO., LTD.
Inventor： Kazukiyo TESHIMA , Naoto YAMADA
Abstract: A resin member capable of inhibiting generation of particles due to repeated bending thereof is provided. A rolling diaphragm 5 composed of a resin member has one surface formed as a liquid contact surface 37a, repeatedly bends when used, and has flexibility. A surface roughness of the liquid contact surface 37a at a portion 371 that bends is less than 0.40 μm as an arithmetic average roughness, and a total light reflectance of the liquid contact surface 37a at the portion 371 that bends is not less than 2.0%.
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公开(公告)号：US20190390773A1
公开(公告)日：2019-12-26
申请号：US16424663
申请日：2019-05-29
Applicant: NIPPON PILLAR PACKING CO., LTD.
Inventor： Tomohiro ADACHI , Atsushi NAKANO , Tomoyuki KOIKE , Kazukiyo TESHIMA , Motoaki NARUO
Abstract: A structure allowing a gasket to be mounted on a fluid device is provided. The gasket includes a ring with a first annular slope at a first axial end. The fluid device includes an inner sleeve with a second annular slope and an outer sleeve radially outside the inner sleeve. An outer periphery of the ring includes an annular contact face that contacts the outer sleeve and an annular non-contact face radially separated from the outer sleeve. The first annular slope contacts an outer periphery of the second slope.
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Patent Agency Ranking
公开(公告)号：US20220341414A1
公开(公告)日：2022-10-27
申请号：US17641341
申请日：2020-06-12
Applicant: NIPPON PILLAR PACKING CO., LTD.
Inventor： Yuki OTONO , Ai TOMOTOSHI , Kazukiyo TESHIMA
IPC: F04B49/02 , F04B49/22 , F04B43/113
Abstract: A bellows pump device includes a control unit which, before operation of the bellows pump device is started, performs initial control in which solenoid valves are switched and pressurized air is supplied to suction-side air chambers in advance, thereby determining operation air pressures which are air pressures of the pressurized air to be supplied to the suction-side air chambers during the operation. As the initial control, the control unit outputs control commands to electropneumatic regulators so as to gradually increase the air pressures of the pressurized air to be supplied to the suction-side air chambers in advance, and when detection signals resulting from detection of expansion positions of the bellows are inputted from the proximity sensors to the control unit, the control unit determines the air pressures of the pressurized air supplied to the suction-side air chambers at that time as the operation air pressures.
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公开(公告)号：US20200182234A1
公开(公告)日：2020-06-11
申请号：US16707167
申请日：2019-12-09
Applicant: NIPPON PILLAR PACKING CO., LTD.
Inventor： Atsushi NAKANO , Ai TOMOTOSHI , Kazukiyo TESHIMA
Abstract: A bellows pump device includes: a first electropneumatic regulator 51 that adjusts a first air pressure of pressurized air in a first discharge-side air chamber 21A of a first air cylinder unit 27; a second electropneumatic regulator 52 that adjusts a second air pressure of pressurized air in a second discharge-side air chamber 21B of a second air cylinder unit 28; and a control unit 6 that controls the first electropneumatic regulator 51 such that the first air pressure is continuously decreased during a period from a time when a second bellows 14 starts contracting until a first bellows 13 comes into a most contracted state, and controls the second electropneumatic regulator 52 such that the second air pressure is continuously decreased during a period from a time when the first bellows 13 starts contracting until the second bellows 14 comes into a most contracted state.
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公开(公告)号：US20190154532A1
公开(公告)日：2019-05-23
申请号：US16314710
申请日：2017-05-01
Applicant: NIPPON PILLAR PACKING CO., LTD.
Inventor： Kazukiyo TESHIMA , Daisuke URATA , Naoto YAMADA , Takuya MURAKAMI
Abstract: A reciprocating pump includes: a housing with a fluid channel that includes a pump chamber; a reciprocated member that is disposed in the housing to form the pump chamber, and reciprocable for suction and discharge of fluid; an actuator configured to reciprocate the reciprocated member; and a pressure gauge with a pressure receiving portion, configured to detect pressure of the fluid in the fluid channel via the pressure receiving portion. The housing includes an inner wall facing the fluid channel, and a flexible, membranous portion placed continuously next to the inner wall to face the fluid channel. The pressure gauge is attached to the housing such that the membranous portion is sandwiched between the pressure receiving portion and the fluid channel.
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公开(公告)号：US20230349492A1
公开(公告)日：2023-11-02
申请号：US18041746
申请日：2021-06-04
Applicant: NIPPON PILLAR PACKING CO., LTD.
Inventor： Kiyotaka OHMAE , Masashi KATANAYA , Ayumi KUROSAKI , Shingo HIGUCHI , Kazukiyo TESHIMA
IPC: F16L17/067
CPC classification number: F16L17/067
Abstract: A tapered surface 14 is formed at each axially outer end portion of an inner circumferential surface 3a of a gasket 3 such that a diameter thereof gradually increases from an axially inner side toward an axially outer end thereof in a state before an annular primary sealing portion 11 of the gasket 3 is press-fitted into an annular primary sealing groove 2b of a fluid device 2. A diameter increase starting point P1 of the tapered surface 14 is located in a range R from a deformation starting point position P2 serving as a starting point from which the inner circumferential surface 3a is deformed due to the primary sealing portion 11 receiving external force form the fluid device 2 when the primary sealing portion 11 is press-fitted into the primary sealing groove 2b, to a center position P3 in an axial direction of the inner circumferential surface 3a.
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公开(公告)号：US20210123429A1
公开(公告)日：2021-04-29
申请号：US16963138
申请日：2018-11-06
Applicant: NIPPON PILLAR PACKING CO., LTD.
Inventor： Kazukiyo TESHIMA , Daisuke URATA
IPC: F04B43/067 , F04B53/14
Abstract: A rolling diaphragm pump that can inhibit an increase in cost with a simple configuration is provided. A rolling diaphragm pump 1 includes: a housing 2; a piston 3 disposed so as to be slidable relative to an inner peripheral surface of the housing 2 and reciprocatable in an axial direction; a rolling diaphragm 4 having a movable portion 41 disposed at one end portion in the axial direction of the piston 3 and reciprocatable together with the piston 3, a fixed portion 42 fixed to the housing 2, and a flexible connecting portion 43 connecting the movable portion 41 and the fixed portion 42 to each other; a pump chamber 5 defined by the rolling diaphragm 4 at one side in the axial direction within the housing 2 and into and from which a transport fluid is sucked and discharged by changing a volume of an interior of the pump chamber 5 by deformation of the connecting portion 43 due to reciprocation of the piston 3; and a working fluid chamber 6 defined by another end portion in the axial direction of the piston 3 at another side in the axial direction within the housing 2 and into and from which a working fluid is supplied and discharged, thereby causing the piston 3 to reciprocate.
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