| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a quantitative pump capable of eliminating a useless dispensing operation after it is found to be impossible to determine the quantity caused by mixing air into a dispensed content, and having no possibility of dropping the content from an air introducing hole even when a container body falls down. <P>SOLUTION: In the quantitative pump in which a piston member 80 is freely slidably fitted into a cylinder member 10, a suction hole 13 is formed on the bottom wall 12 of the cylinder member, a sucking-up pipe 60 hung down into the container body through a suction valve 61 is connected with the suction hole 13, a dispensing opening 18 is formed on the cylinder bottom wall 12, and there are provided a dispensing path with a dispensing valve communicating with the cylinder member through the dispensing opening and an escaping path communicating in the container body. There are provided opening and closing valves 16 and 23 capable of opening and closing the escaping path, and an operating member 40 capable of operating the opening and closing valves. At the time when the remaining quantity of the content in the container body decreases, by positioning the opening and closing valve at an opening position by the operating member, the escaping path is made to communicate with the container body, to make it impossible to dispense the content in the container and to suck it into the cylinder member. <P>COPYRIGHT: (C)2011,JPO&INPIT |
