Seikagaku Corporation

Hitachi, Ltd.

Toyo Seikan Kaisha, Ltd.

Hitachi Mito Engineering Co., Ltd.

Yosuke Yasuda

Yutaka Sato

Kenji Miyamoto

Osamu Suzuki

Shinichi Miyazaki

Satoshi Yamaguchi

Takeshi Tanaka

Sunao Funakoshi

Masaki Miura

Atsuo Nishihara

Keisuke Horiuchi

Katsuya Takahashi

Sho Funayama

Keiji Yoshioka

Akihiro Takezawa

Katsumi Ishikawa

Nobuhiro Kishida

Takahiro Yamauchi

Tomoo Hayashi

Satoru Okabe

Akihito Morimura

Yoshimichi Ohkubo

Tsutomu Kominami

Mami Kunihiro

Akihiro Hishida

Hisayuki Takeuchi

Takayoshi Nishino

Minoru Yoshino

Masaru Katagiri

Kentarou Mae

Yoshitaka Nishimura

The invention provides a diamine crosslinking agent for acidic polysaccharides consisting of a diamine compound having a primary amino group at both terminals and an ester or thioester bond in the molecule, wherein the number of atom in the linear chain between at least one of the amino groups and the carbonyl carbon in the ester or thioester is 1 to 5; in particular, a diamine crosslinking agent for acidic polysaccharides which is represented by the general formula (I) below: [the symbols in the formula are as described in the specification]; a crosslinked acidic polysaccharide obtained by forming crosslinks by amide bonding between the amino groups in the diamine crosslinking agent and carboxyl groups in an acidic polysaccharide; and a medical material including the crosslinked product.

Diamine crosslinking agents, crosslinked acidic polysaccharides and medical materials

The present invention provides a glycosaminoglycan derivative in which a group derived from glycosaminoglycan and a group derived from a physiologically active substance having at least one of a carboxy group and a hydroxy group are coupled by covalent bond with a spacer therebetween, in which the spacer is selected in accordance with the decomposition rate of the covalent bond to the group derived from the physiologically active substance.

Glycosaminoglycan derivative and method for producing same

A cooling system for an onboard electrical power converter in which a heat dissipation surface extends parallel to a flow of cooling air draft includes: a coolant tank containing coolant that includes a bottom surface being in thermal contact with the heat dissipation surface; a first conduit provided connecting to an upper surface of the coolant tank, the coolant flowing into the first conduit; a heat exchanger that comprises second conduits arranged with opposing the upper surface, and conducts the coolant to upstream; and a return unit that returns the coolant to the coolant tank; wherein the heat exchanger comprises heat dissipation fins through which the cooling air draft passes from a first to a second side, the heat dissipation fins being provided on surfaces of the second conduits, the first side not facing the coolant tank and the second side facing the coolant tank.

Cooling system for onboard electrical power converter, and electrical power converter for railway vehicle

A power converter including: a plurality of semiconductor devices forming a power conversion circuit; a base section to which the plurality of semiconductor devices are attached; and radiating fins dissipating heat generated from the semiconductor devices into outside air, in the power converter in which the direction of the flow of a refrigerant flowing into the radiating fins changes depending on the operation status of the power conversion circuit, the shape of each radiating fin changes in such a way that the cross-sectional area of a channel of the refrigerant on the outflow side becomes smaller than the cross-sectional area of the channel of the refrigerant on the inflow side in the radiating fins depending on the direction of the flow of the refrigerant.

Power converter

An electric power converter for a vehicle, including a semiconductor element from which a motor drive current is output, a drive circuit that drives the semiconductor element, a control circuit that controls the drive circuit, a capacitor that smooths a DC current to be input to the semiconductor element, a container housing the semiconductor element, the drive circuit, the control circuit and the capacitor, a refrigerant retained in a state of vapor-liquid two-phase equilibrium within the container, and a heat exchanger unit that condenses the refrigerant in a vapor phase to be a liquid phase and exchanges heat with outside, wherein the semiconductor element, the drive circuit, the control circuit and the capacitor are disposed in a positional arrangement that will leave the semiconductor element, the drive circuit, the control circuit and the capacitor immersed in the refrigerant as the electric power converter is installed in the vehicle, and the heat exchanger unit is disposed at a side of a wall of the container forming a vapor-phase space.

Electric power converter

An apparatus for the preparation of a vessel having a handle, which includes an injection mold having a cavity for forming a handle having an endless holding portion and an endless attachment portion; an injection molding mechanism for injecting a resin for the handle into the cavity of the injection mold; a blow-forming or draw-blow-forming split mold having a parting surface that can be closed, cavity assembly which is arranged in the split mold plane-symmetrically with the parting surface and includes an inserting cavity for containing the handle therein, and a forming cavity which has a neck-forming cavity, a barrel-forming cavity, a closed bottom-forming cavity, a recess-forming cavity formed at a part of the barrel-forming cavity so that the diameter of a deepest part of the recess-forming cavity is substantially equal to or slightly larger than the diameter of the neck-forming cavity, a projection-forming cavity for forming a projection to project and extend through the attachment portion almost to the center of the recess-forming cavity, and a flange-forming cavity formed on the top end of the projection-forming cavity to have a section expanded over the projection-forming cavity; a mechanism for supplying a blowing pressure into a preform held by the split mold to effect blow-forming or draw-blow-forming of the preform; a pushing pin that can be pressed into the flange-forming cavity; and a pushing pin-driving mechanism.

Apparatus for preparation of synthetic resin vessel having a handle

A synthetic resin vessel having a handle, which comprises a vessel proper comprising a neck, a barrel and a closed bottom, which are integrally prepared by blow-forming or draw-blow-forming of a synthetic resin, a recess formed at a part of the barrel so that a deepest part of the recess has a diameter substantially equal or slightly larger than the diameter of the neck, a projection formed substantially at the center of the recess so that the section of the projection is non-circular, a circumferential concave groove formed around the projection, and a pair of short concave grooves extending from the top end and bottom end of the circumferential concave groove along the concave portion upwardly and downwardly, respectively, and a handle comprising an endless holding portion and an endless attachment portion, which are integrally prepared by injection molding of a synthetic resin, the handle being fixed by inserting the attachment portion into the circumferential concave groove and inserting the central part of the holding portion on the side end of the attachment portion into the short concave grooves.

Synthetic resin vessel having handle

A synthetic resin bottle has a main body of synthetic resin molded in accordance with biaxial orientation. A handgrip is provided which has an attaching section surrounding a handgrip supporting portion of the main body, and a handgrip section extending outwardly and integrally from the attaching section. The handgrip is molded by means of injection molding to attach integrally to the body.

Synthetic resin bottle furnished with handgrip and method for

Growing community of inventors

Tokyo, Japan

Yosuke Yasuda