JPH01151784A

JPH01151784A - Simple vacuum pump

Info

Publication number: JPH01151784A
Application number: JP31051787A
Authority: JP
Inventors: Katsuyoshi Kakegawa; 掛川　克義
Original assignee: Individual
Current assignee: Individual
Priority date: 1987-12-08
Filing date: 1987-12-08
Publication date: 1989-06-14

Abstract

PURPOSE:To obtain a simple vacuum pump by forming suction and exhaust valves from a rubber board at the tip section of a syringe. CONSTITUTION:A rubber board and the like is sticked onto the inner face at the tip section of a syringe to form a suction valve 1. A hole 2 is made through the circumferential face at the tip of the syringe, while a rubber board and the like is sticked to a hole section 2 in the outer circumferential face of the cylindrical syringe to form a discharge valve 3. A vacuum pump comprising a syringe is constituted in such a manner where the tip of the syringe is coupled through a tube with a container to be evacuated. When a piston is slided reciprocally, air is sucked from a container through the suction valve 1 into the syringe then discharged through the discharge valve 3 to the atmosphere, and thereby a near vacuum state can be produced easily in the container.

Description

【発明の詳細な説明】この発明は、注射器にゴムなどの弁を付け、ピストンの
出し入れによって、真空に近い状態をつくりだす装置に
関するものである。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a device that creates a near-vacuum state by attaching a valve made of rubber or the like to a syringe and moving a piston in and out.

理科の実験などで、真空に近い状態をつくるとき、従来
、その方法として、水を加熱し、水蒸気にして空気を追
い出す方法が行なわれてきたが、火を使うことの危険性
や、水蒸気を冷やすと真空状態ができることが理解しに
くいなどの問題があった。また、電動の真空ポンプは、
高価で購入がむずかしいのが現状である。Traditionally, when creating a near-vacuum state in science experiments, etc., the method was to heat water, turn it into steam, and expel the air. There were problems such as it being difficult to understand that a vacuum state can be created by cooling. In addition, electric vacuum pumps
Currently, they are expensive and difficult to purchase.

本発明は、小・中学校などの理科実験に必要な真空に近
い状態を、極めて簡単な方法でつくりだすことに成功し
たものである。The present invention has succeeded in creating a near-vacuum state necessary for science experiments in elementary and junior high schools using an extremely simple method.

以下、それを説明すると、（イ）ゴムなどの弁を、注射器の先に入れる。I will explain it below, (a) Insert a rubber or other valve into the tip of the syringe.

（ロ）注射器の先端の側面に孔をあける（ハ）（ロ）で
あけた孔の上にゴムなどの弁をつける。(b) Drill a hole on the side of the tip of the syringe (c) Attach a valve made of rubber or other material over the hole drilled in (b).

こうすれば、ピストンの出し入れにより、注射器の先端
から吸入された気体は、側面の込から排気される。排気
したい物の容器と注射器の先端とを、管で接続すること
により、簡単に真空に近い状態をつくりだすことができ
る。例えぱ、５００ｍｌの丸底フラスコでは、ピストン
をわずか３０回程動かすだけで、９０％の空気がぬける
のである。In this way, the gas inhaled from the tip of the syringe by moving the piston in and out is exhausted from the side recess. By connecting the container containing the substance to be evacuated and the tip of the syringe with a tube, a near-vacuum state can be easily created. For example, in a 500ml round bottom flask, 90% of the air can be removed by moving the piston just 30 times.

本発明は、このように簡単な方法で真空に近い状態をつ
くることを可能にするものである。The present invention makes it possible to create a state close to a vacuum using such a simple method.

[Brief explanation of the drawing]

第１図は本案の断面図第２図は本案の見取り図（１）はゴムなどの弁、（２）は側面の込、（３）はゴ
ムなどの弁。Figure 1 is a sectional view of the proposed design. Figure 2 is a sketch of the proposed design. (1) is a valve made of rubber, (2) is a side insert, and (3) is a valve made of rubber.

Claims

[Claims]

A vacuum pump with a valve attached to the syringe.