Ebara Corporation

Florida State University Research Foundation, Inc.

Masashi Obuchi

Hiromi Sakacho

Hiroshi Uchida

Masahito Kawai

Miho Isono

So Kuroiwa

Mariano Matteazzi

Alessandro Corsini

Fabio Balbo

Dai Sakihama

Renato Groppo

Lucio Cardillo

Giovanni Delibra

Franco Rispoli

Kenta Tokairin

Masashi Shimoyama

Yoichi Nakamura

Yoshiaki Miyazaki

Kazuhito Tsuji

Motohiko Nohmi

Junya Kawabata

Atsushi Shiokawa

Kunihiko Taira

Byungjin An

Qiong Liu

Provided is a technique that ensures the suppressed deterioration of plating quality of a substrate due to air bubbles that remain on a surface to be plated of the substrate. A plating apparatusincludes a plating tank, a substrate holder, a rotation mechanism, and an elevating mechanism. The plating tankis configured to accumulate a plating solution and include an anodearranged inside the plating tank. The substrate holderis arranged above the anode and configured to hold a substrate as a cathode such that a surface to be plated of the substrate faces downward. The substrate holder includes a ringprojecting below an outer peripheral edge of the surface to be plated of the substrate. The rotation mechanismis configured to rotate the substrate holder. The elevating mechanismis configured to elevate the substrate holder. The ring has a lower surface, and at least one protrusionprojecting toward a lower side is arranged on a part of the lower surface.

Plating apparatus and air bubble removing method of plating apparatus

The present invention relates to a volute pump for delivering a liquid containing fibrous substances. The volute pump includes an impeller () having a vane (), and an impeller casing () which houses the impeller () therein. The impeller casing () includes a volute chamber (), a suction port () and a discharge port () which communicate with the volute chamber (), and a tongue portion () which forms a starting portion of the volute chamber (). A groove (), extending from the suction port () to the volute chamber (), is formed in an inner surface of the impeller casing (). An intersection point (B), where a terminal end of the vane () passes across the groove () as viewed from an axial direction of the impeller (), is located at an opposite side from the tongue portion () with respect to a central point of the impeller ().

Volute pump

A volute pump for delivering a liquid containing fibrous substances. The volute pump includes an impeller () rotatable together with a rotational shaft (), and an impeller casing () having a suction port () and a volute chamber (). A groove (), extending from the suction port () to the volute chamber (), is formed in an inner surface of the impeller casing (). The impeller () includes a hub () to which the rotational shaft () is fixed, and a sweep-back vane () extending helically from the hub (). The sweep-back vane () includes a leading edge portion () extending helically from the hub (), and a trailing edge portion () extending helically from the leading edge portion (). The leading edge portion () has a front-side curved surface () extending from an inner end () to an outer end () of the leading edge portion ().

A vortex control device for modifying a vortex in a fluid stemming from a wall is disclosed. The device includes a rotatable hub disposed within an opening in the wall. The device also includes an inlet port and an outlet port in the rotatable hub. The inlet port forms a suction port to suction fluid from or about the vortex, and the outlet port forms an injection port to inject fluid into or about the vortex.

Systems and methods for actively controlling a vortex in a fluid

An impeller assembly for centrifugal pumps has two disk members that have different diameters, are arranged coaxially to a rotation axis and face each other so as to form an interspace; blades are radially arranged in the interspace; the two disk members are also centrally provided with a fastening means for fastening to a transmission shaft, which rotates about the rotation axis. The particularity of the present invention resides in having contoured vanes that protrude radially from the peripheral region of the disk member that has the smallest diameter and are arranged substantially at the blades.

Impeller assembly for centrifugal pumps

The present invention relates to a volute pump and particularly provides a volute pump for delivering a liquid containing fibrous substances and solid substances, while preventing these substances from obstructing the pump. The volute pump includes a pump casing () having a protrusion () projecting into a flow passage () and separating a starting end of a volute from a terminal end of a volute. The protrusion () faces a liquid outlet () of an impeller (). A radius of curvature (Rb) of a cross section of a distal edge of the protrusion () at its one side end () is larger than a radius of curvature (Ra) of the cross section of the distal edge of the protrusion () at other side end (). The other side end () faces a main plate (), while the one side end () is located opposite to the main plate ().

A casing liner used for a sewage pump includes a surface to face an edge of a blade of an impeller when the casing liner is assembled with the impeller into the sewage pump. At least one groove with given width is formed in at least a part of the surface. The groove includes a first section with given depth, which is located on the side close to a rotational center of the impeller, a second section smaller in depth than the first section, which is located on the side far from the rotational center of the impeller, and a third section that is an inclined face connecting the first and second sections, the first to third sections being arranged in a width direction of the groove.

Casing liner for sewage pump and sewage pump with the same

Impeller for pumps

Impeller for a pump

A non-clogging type pump impeller includes: a fluid passage provided in an approximately cylindrical body and connecting a suction port to a discharge port. The fluid passage has a vortex shape as viewed from an axial direction. A first recess, which is sunk downwardly in the axial direction, is formed on a first end surface of the approximately cylindrical body so as to surround a boss. A second recess, which is sunk upwardly in the axial direction, is formed on a second end surface of the approximately cylindrical body so as to surround the suction port. At least one communication hole provides fluid communication between the first recess and the second recess. Sewage in the second recess is introduced into the first recess through the at least one communication hole to thereby effectively remove an air pocket trapped on the first end surface of the impeller and in the first recess.

Pump impeller and submersible pump having such pump impeller

Growing community of inventors

Tokyo, Japan

Masashi Obuchi