Pump provided with exaust valve device and hemodynamometer incorporating the same

• US 20050049513A1
• Filed: 06/30/2004
• Published: 03/03/2005
• Est. Priority Date: 08/29/2003
• Status: Active Grant

• Current Assignee: Mitsumi Electric Co., Ltd. (Minebea Mitsumi, Inc.)
• Original Assignee: Mitsumi Electric Co., Ltd. (Minebea Mitsumi, Inc.)
• Inventors: Hori, Kenichi
• Granted Patent: US 7,527,595 B2
• Time in Patent Office: Days
• US Class Current: 600/498
• CPC Class Codes: A61B 5/02 Detecting, measuring or recording pulse, heart rate, blood pressure or blood flow; Combined pulse/heart-rate/blood pressure determination; Evaluating a cardiovascular condition not otherwise provided for, e.g. using combinations of techniques provided for in this group with electrocardiography or electroauscultation; Heart catheters for measuring blood pressure
• CPC Class Codes: F04B 45/04 having plate-like flexible members, e.g. diaphragms F04B45/10 takes precedence

Abstract

A diaphragm is provided in a pump case so as to define a pump chamber communicated with an external member having an air chamber. The actuator is provided in the pump chamber. An exhaust valve is provided with a valve body, formed with a slit through which air the pump chamber is exhausted, and a screw member, screwed into a first wall of the pump case to adjust an opening amount of the slit by a screwed amount thereof, thereby adjusting an exhausting rate of the air in the pump chamber. The pump case is formed with a ventilation hole communicated with the pump chamber to allow the air exhausted from the slit to pass through.

Claims

1. A pump, comprising:

a pump case;

a diaphragm, provided in the pump case so as to define a pump chamber communicated with an external member having an air chamber; and

an exhaust valve, comprising;

a valve body, formed with a slit through which air in the pump chamber is exhausted; and

a screw member, screwed into a first wall of the pump case to adjust an opening amount of the slit by a screwed amount thereof, thereby adjusting an exhausting rate of the a in the pump chamber,

wherein the pump case is formed with a ventilation hole communicated with the pump chamber to allow the air exhausted from the slit to pass through.

2. The pump as set forth in claim 1, wherein:

the valve body is disposed between the fist wall and a second wall of the pump case which opposes to the first wall; and

the screw member is abutted against the valve member to adjust a compressed state of the valve member between the screw member and the second wall.

3. The pump as set forth in claim 1, wherein the valve body is formed with an opening having a non-circular cross section including a first section opposing to the screw member and a second section not opposing to the screw member, but opposing to the ventilation hole.

4. The pump as set forth in claim 1, wherein the valve body is monolithicaly formed with the diaphragm.

5. A hemodynamometer, comprising:

a cuff, adapted to be attached on a patient body and having an air chamber; and

a pump, comprising;

a pump case;

a diaphragm, provided in the pump case so as to define a pump chamber communicated with the air chamber; and

an exhaust valve, comprising;

a valve body, formed with a slit through which air in the pump chamber is exhausted; and

a screw member, screwed into a first wall of the pump case to adjust an opening amount of the slit by a screwed amount thereof, thereby adjusting an exhausting rate of the air in the pump chamber,

wherein the pump case is formed with a ventilation hole communicated with the pump chamber to allow the air exhausted form the slit to pass through.