Daikyo Seiko, Ltd.

Daikyo Gomu Seiko, Ltd.

Daiko Seiko Ltd.

Masamichi Sudo

Morihiro Sudo

Hideaki Kawamura

Kouichi Asai

Yasushi Kawachi

Nobuo Sudo

Tamotsu Okuda

Tsuyoshi Koshidaka

Tomoyasu Muraki

There are provided an intermediate slide valve as well as a plunger slide valve equipped in a syringe in direct contact with injection liquids and a syringe equipped with such slide valves, the injection liquids nor valves being not affected with each other. The intermediate slide valveequipped in the syringecomprises an approximately cylindrical first elastic bodyand an approximately cylindrical second elastic bodywhich is jointed with one bottom surfaceof the first elastic body, the other bottom surfaceof the first elastic bodyand a side surface portion continued therefrom being laminated with a synthetic resin filmand the other bottom surfaceof the second elastic bodyand a side surface portion continued therefrom be laminated with a synthetic resin film

Slide valves equipped in a syringe and thus equipped syringe

A container unit for a drug is composed of a container, which is formed of a cylindrical drug-solution-containing portion and a drug-solution-filling neck portion, and a rubber closure for sealing the drug-solution-filling neck portion. The rubber closure comprises a disk-shaped head portion and a substantially cylindrical leg portion arranged on a lower wall of the head portion. The container is provided with a flat surface formed on a side of its inner wall at a boundary between the drug-solution-containing portion and the drug-solution-filling neck portion such that a lower end wall of the leg portion of the rubber closure can be brought into close contact with the flat surface, and at least a side wall of the drug-solution-containing portion forms a cornerless, rounded surface on a side where a drug solution is to be contained. When the drug-solution-filling neck portion has been sealed with the rubber closure, the lower end wall of the leg portion and the flat surface of the container are maintained in close contact with each other without any protrusion of an inner circumferential edge of the lower end wall into an interior of the container beyond an inner circumferential edge of the flat surface.

Container units for drugs, drug containers, and rubber closures

A sealing stopper or piston for a syringe which includes a skirt part that is capable of serving as a backstop device, and a prefilled syringe using the same. The skirt part provides a backstop function, i.e. it prevents reverse movement of the piston, without increasing production costs.

Piston for a syringe and a prefilled syringe using the same

Syringe plunger

Piston for syringe

Syringe flange

A molding die assembly includes an upper die and a lower die, wherein at least one of the upper and lower dies is provided with a cavity corresponding to the shape of a rubber member to be molded, wherein at least one of the upper and lower dies is provided with an annular projection around a cavity. The distance between the upper and lower dies at the annular projection is made smaller than the distance between the opposed surface portions, other than the cavity, of the upper and lower dies. A rubber member produced by the above mentioned molding die assembly is also provided.

Molding die assembly for rubber members and rubber member produced thereby

Syringe barrel

Syringe nozzle cap

Growing community of inventors

Tokyo, Japan

Masamichi Sudo