Pump for fluid supply and method for supplying fluid

Abstract

The present invention includes a fixed member provided the drive motor, drive gear and transmission gear which move an output shaft of the drive motor in concert and a clutch mechanism having a clutch which engages with said gears, a driven gear which is provided at an end portion of the inner sleeve body, engaging with an operating rod of the extrusion operating part freely and engaging with the drive gear and a screwed body, which is formed in the shape of a sleeve, positioning between support plates of the fixed member, screwing a screwed part of the operating rod and engaging with the transmission gear. Therefore, it can reduce the manufacturing cost.

1 . A pump for supplying fluid comprising: 
 an outer sleeve body having a suction hole and discharge hole;    an extrusion operating part which is installed rotatably into said outer sleeve body, installing a slide part into an inner sleeve body with a function of an inner valve;    a drive motor which makes to said inner sleeve body and said extrusion operating part;    a fixed member which is provided said drive motor, a drive gear and transmission gear which move an output shaft of said drive motor in concert and a clutch mechanism having a clutch which engages with said gears;    a driven gear which is provided at an end portion of said inner sleeve body, engaging with an operating rod of said extrusion operating part freely and engaging with said drive gear; and    a screwed body, which is formed in the shape of a sleeve, positioning between support plates of said fixed member, screwing a screwed part of said operating rod and engaging with said transmission gear.    
   
   
       2 . The pump for supplying fluid according to  claim 1 , wherein said extrusion operating part reciprocates through means for preventing rotation, said prevention means including a catching part which is provided at said operating rod and a caught part which is provided at said fixed member.  
   
   
       3 . The pump for supplying fluid according to  claim 1 , wherein said drive gear and said transmission gear are fixed to said output shaft of said drive motor, and said clutch is provided slidably at said output shaft to connect to said drive gear and transmission gear selectively.  
   
   
       4 . The pump for supplying fluid according to  claim 1 , wherein said operating rod of said extrusion operating part passes through a center part of said driven gear and said screwed body and is supported by said support plate of said fixed member.  
   
   
       5 . The pump for supplying fluid according to  claim 1 , wherein inner sleeve body further includes an elongated body having an opening, capably of communicating with said suction hole and discharge hole selectively and a shorten end part capable of engaging with said elongated body, and said shorten end part is biased always in a fitting direction by an elastic member which is provided indirectly to said operating rod of said extrusion operating part.  
   
   
       6 . The pump for supplying fluid according to  claim 1 , wherein said fixed member has a plurality of means for detecting moving position of said extrusion operating part.  
   
   
       7 . A method for supplying fluid by a pump for supplying fluid, said pump including an outer sleeve body having a suction hole and discharge hole, an extrusion operating part which is installed rotatably into said outer sleeve body, installing a slide part into an inner sleeve body with a function of an inner valve and a drive motor which makes to said inner sleeve body and said extrusion operating part, said method comprising: 
 going back said extrusion operating part through a clutch of a clutch mechanism and by driving force of one of said drive motor;    rotating said inner sleeve body at a predetermined degree through said clutch of said clutch mechanism and by driving force of said drive motor and falling said fluid which is stored into a constant-volume chamber of said inner sleeve body;    going said extrusion operating part forward through said clutch of said clutch mechanism and by driving force of said drive motor; and    standing ready said inner sleeve body to rotate at a predetermined degree through said clutch of said clutch mechanism and by driving force of said drive motor and rotate to an original position    
   
   
       8 . The method for supplying fluid by a pump for supplying fluid according to  claim 7 , wherein said extrusion operating part reciprocates through means for preventing rotation, said prevention means including a catching part which is provided at said operating rod and a caught part which is provided at said fixed member.