Diaphragm pump and blood pressure monitor

Patent metadata

Field	Value
Publication number	US-9375155-B2
Application number	US-201113192109-A
Country	US
Kind code	B2
Filing date	Jul 27, 2011
Priority date	Jan 28, 2009
Publication date	Jun 28, 2016
Grant date	Jun 28, 2016

Abstract

A diaphragm pump for achieving reduced pressure ripple of an exhausted gas is provided. The diaphragm pump is a pump for transporting a gas in accordance with change in volume of a pump chamber, and the diaphragm pump includes an exhaust valve permitting flow of the gas that flows out of the pump chamber and prohibiting a flow thereof in a reverse direction, an air chamber in which the gas that has flowed out of the pump chamber through the exhaust valve flows, an exhaust port through which the gas is exhausted to the outside of the diaphragm pump, and a through hole portion for restricting a flow rate of the gas that flows from the air chamber to the exhaust port.

First claim

What is claimed is:

1. A diaphragm pump for transporting a gas in accordance with change in volume of a pump chamber, comprising:
an exhaust valve for permitting flow of the gas that flows out of the pump chamber and prohibiting flow thereof in a reverse direction; and
a gas gathering body, the gas gathering body including an air chamber being formed therein in which the gas that has flowed out of the pump chamber through the exhaust valve flows, an exhaust port through which the gas is exhausted via an exhaust path to outside of the diaphragm pump, and a partition wall portion for partition between the air chamber and the exhaust path being formed by a part of the gas gathering body projecting inward,
wherein in the partition wall portion, a through hole portion for communication between the air chamber and the exhaust path is formed,
wherein the through hole portion restricts a flow rate of the gas that flows from the air chamber to the exhaust port, and
wherein the through hole is formed in a central portion of the partition wall portion.

2. The diaphragm pump according to claim 1 ,
wherein a plurality of the pump chambers are provided, and
wherein a same number of the air chambers and a same number of the through hole portions as a number of the plurality of the pump chambers are provided.

3. The diaphragm pump according to claim 1 ,
wherein a plurality of the pump chambers are provided,
wherein a single said air chamber is provided, and
wherein gases that have flowed out of the plurality of the pump chambers gather in the air chamber.

4. A blood pressure monitor, comprising:
a cuff attached to a blood pressure measurement site of a subject and having a bladder filled with a gas;
the diaphragm pump according to claim 1 , for transferring the gas to said bladder;
a pressure detection unit for detecting a pressure within said cuff; and
a measurement unit for measuring a blood pressure of the subject based on a pressure value detected by said pressure detection unit.

Assignees

• Sano Yoshihiko
• Kukita Tomohiro
• Omron Healthcare Co Ltd

Inventors

• Sano Yoshihiko
• Kukita Tomohiro

Classifications

• F04B43/026

  each plate-like pumping flexible member working in its own pumping chamber · CPC title

• A61B5/02233

  Occluders specially adapted therefor (tourniquets A61B17/132) · CPC title

• F04B1/148

  Bearings therefor · CPC title

• A61B5/0225

  the pressure being controlled by electric signals, e.g. derived from Korotkoff sounds · CPC title

• A61B5/02141 Primary

  Details of apparatus construction, e.g. pump units or housings therefor, cuff pressurising systems, arrangements of fluid conduits or circuits (A61B5/02233, A61B5/0235 take precedence) · CPC title