Pump

Abstract

The present invention provides a diaphragm-type pump for feeding a low-viscosity fluid such as air under high pressure while miniaturizing the size of a feeding means. In the pump connected with a feeding pipe and a delivery pipe for delivering a fluid fed from the feeding pipe through the delivery pipe, the pump includes a housing provided with a storage chamber connecting with the feeding pipe and the delivery pipe through a one-way valve respectively and storing the fluid therein temporarily, a vibration plate arranged to face the storage chamber in an opposed manner and driven in a reciprocating manner so as to push out the fluid to the delivery pipe after sucking the fluid from the feeding pipe into the storage chamber, and a drive part for driving the vibration plate in a reciprocating manner. A ring-shaped tube is arranged along an outer periphery of the vibration plate, and the vibration plate is mounted on the housing by way of the tube thus enabling driving of the vibration plate in a reciprocating manner while elastically deforming the tube.

1 . A pump connected with a feeding pipe and a delivery pipe for delivering a fluid fed from the feeding pipe through the delivery pipe, the pump comprising:
 a housing provided with a storage chamber connecting with the feeding pipe and the delivery pipe through a one-way valve respectively and storing the fluid therein temporarily;   a vibration plate formed of a plate body and arranged to face the storage chamber in an opposed manner and driven in a reciprocating manner so as to push out the fluid to the delivery pipe after sucking the fluid from the feeding pipe into the storage chamber; and   a drive part for driving the vibration plate in a reciprocating manner, wherein   a ring-shaped tube is arranged along an outer periphery of the vibration plate, a gas or a liquid is filled in the tube at a pressure equal to a pressure of the fluid in the storage chamber or at a pressure higher than the pressure of the fluid in the storage chamber, and the vibration plate is mounted on the housing by way of the tube thus enabling driving of the vibration plate in a reciprocating manner.   
   
   
       2 . (canceled) 
   
   
       3 . A pump according to  claim 1 , wherein an outwardly-protruding flange is formed on an outer periphery of the tube, a fitting groove which allows fitting of the flange therein is formed in the housing, and the vibration plate is mounted on the housing by fitting the flange in the fitting groove. 
   
   
       4 . A pump according to  claim 1 , wherein a ring-shaped first supporting wall and a ring-shaped second supporting wall protruding inwardly are formed on an inner peripheral surface of the housing parallel to each other with a predetermined distance therebetween, and the vibration plate is mounted on the housing by fitting the tube between the first supporting wall and the second supporting wall. 
   
   
       5 . A pump according to  claim 1 , wherein the tube includes a filling means for adjusting a pressure in the tube by filling a gas or a liquid in the tube.