Nippon Pillar Packing Co., Ltd.

Yuasa Corporation

Masaki Miyamoto

Toshihide Iida

Tomoyuki Koike

Makoto Fujii

Atsushi Nakano

Daisuke Urata

Tatsuya Fujii

Shintaro Makihata

Kazukiyo Teshima

Hiroki Sakamoto

Kiyotaka Ohmae

Motoaki Naruo

Masateru Yamada

Masaharu Watada

Seijiro Ochiai

Minoru Kuzuhara

Yoshihiro Katayama

Keiji Nagae

Satoru Matsuda

Mitsuhiro Kodama

Kouichi Sakamoto

Kenji Yamazaki

Yuta Matsuda

Kaori Syodai

Manabu Kanemoto

A resin tube fitting has a body with a sleeve allowing the longitudinal end of the tube to be put therein, an inner ring with a press-in portion configured to be pressed in the longitudinal end of the tube, and a union nut with a connector configured to be screwed to an outer periphery of the body to allow the longitudinal end of the tube to be put radially between the connector and the press-in portion. The inner ring and the union nut are made of resin, which has a property of contracting in response to change in ambient temperature. The radial contraction rate of the connector is higher by 0.05% or more than that of the press-in portion of the inner ring.

Resin pipe fitting

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.

Method for manufacturing resin pipe joint

A resin tube fitting has: a body with an outer sleeve; an inner ring including an insert portion insertable into the outer sleeve to contact the outer sleeve radially, and a press-in portion configured to be pressed into a longitudinal end of the tube; and a union nut configured to be engageable with the body. The body and the inner ring are made of resin, which has a property of contracting in response to change in ambient temperature. A radial contraction rate of the outer sleeve of the body is designed to be higher by 0.09% or more than that of the insert portion of the inner ring.

Resin tube fitting

A structure of a resin-made pipe joint includes a joint body having a cylindrical shape, a sleeve having a cylindrical press-inserting portion which is press-insertable into the joint body and a cylindrical coupling portion which is press-insertable into a tube, and a fastening member for fixing the tube which is in a state where the coupling portion is press-inserted, to the joint body through the sleeve. The sleeve contains a sealing surface in an outer circumferential surface of the press-inserting portion, the sealing surface being closely contactable with an inner circumferential surface of the joint body, and comprises a non-contacting surface between the press-inserting portion and the coupling portion, the non-contacting surface forming a space with respect to the inner circumferential surface of the joint body, when the sealing surface is closely contacted with the inner circumferential surface of the joint body.

Structure of resin-made pipe joint

Provided is a bellows pump device that is able to reduce fall of a discharge pressure of a transport fluid during contraction operation of a bellows. The bellows pump device supplies pressurized air to a hermetic discharge-side air chamber thereby to cause a bellows disposed within the discharge-side air chamber to perform contraction operation to discharge a transport fluid, and discharges the pressurized air from the discharge-side air chamber thereby to cause the bellows to perform expansion operation to suck the transport fluid. The bellows pump device includes an electropneumatic regulator configured to adjust an air pressure of the pressurized air to be supplied to the discharge-side air chamber, such that the air pressure is increased so as to correspond to a contraction characteristic of the bellows during the contraction operation of the bellows.

Bellows pump device

A resin-made pipe joint with enhanced sealing property between a joint body and sleeve. A sealing portion which seals between an inner circumferential surface of an inserting portion of a sleeve and an outer circumferential surface of an inner cylinder portion is formed by press-inserting an inserting portion into a groove portion of the joint body. When the inserting portion is press-inserted into the groove portion, a space is formed between a body cylinder portion located opposite to an opening portion of the groove portion in the axial direction, and the projection end of the inserting portion. After completing press insertion of the inserting portion into the groove portion, in a section including axis of the inner cylinder portion, a region in the outer circumferential surface of the inner cylinder portion facing the space forms an angle of 5&#xb0; to 15&#xb0; to the axis of the inner cylinder portion.

Resin-made pipe joint

A resin-made pipe joint enhancing sealing property between a joint body and a sleeve. The joint body and the sleeve are produced by using a fluorine resin. A sealing portion which seals between the inner circumferential surface of an inserting portion of the sleeve and the outer circumferential surface of the inner cylinder portion is formed by press-inserting the inserting portion into a groove portion of the joint body. When, with respect to the inserting and groove portions, an insertion rate of the inserting portion to the groove portion is indicated by X, and a multiplying factor of the radial width of the inserting portion to the radial width of the groove portion is indicated by Y, the resin-made pipe joint has the insertion rate and multiplying factor which are within a range defined by following Expressions (1) and (2):=&#x2212;0.218+1.218&#x2003;&#x2003;(1)and=&#x2212;0.67+1.67.&#x2003;&#x2003;(2)

An antistatic cover which, when the cover covers an insulating resin-made tube, can enhance the certainty of preventing the tube from being electrically charged, and can facilitate attachment to and detachment from the tube. The tubular cover body, is divided in a circumferential direction to form first and second divided portions. The cover body is elastically deformed such that the first and second divided portions separate from each other, and allow the tube to pass through between the first and second divided portions. The cover body has a plurality of first cutaway portions, which pass through at least one of the first and second divided portions in a radial direction of the cover body, and is configured such that, when the cover body is fitted onto the tube, a part of the tube can be exposed through the plurality of first cutaway portions.

Antistatic cover

A sealed alkaline storage battery including a nickel electrode as a positive electrode, characterized by having the function of being capable of charge when the gas pressure in the battery and/or the battery temperature is not higher than a specified value and of being incapable of charge when the gas pressure in the battery and/or the battery temperature exceeds the specified value.

Growing community of inventors

Osaka, Japan

Masaki Miyamoto