Fluid supplying device

A fluid supplying device comprising:

• a peristaltic pump including depression and delivery means and an electric motor said depression and delivery means including an elastic tube (17) for receiving fluid and an assembly of depressing members (15) for alternately constricting and relaxing said elastic tube, and a drive shaft (10) connecting said depression and delivery means to said electric motor (24);
• a rotary member (21) provided on said drive shaft to rotate with said drive shaft;
• a plurality of discharge-amount transmitting means (22) provided on said rotary member such that the distances between respective discharge-amount transmitting means can be varied;
• a detector (23) disposed at the position of passage of said discharge-amount transmitting means for detecting the passage of said discharge-amount transmitting means;
• a preset counter (37) connected to said detector;
• and a switch (40) connected between said preset counter and said electric motor to selectively deenergize said electric motor.

A fluid supplying device comprising:

• a peristaltic pump including depression and delivery means and an electric motor, said depression and delivery means including an elastic tube (17) for receiving fluid and an assembly of depressing members (15) for alternately constricting and relaxing said elastic tube, and a drive shaft (10) connecting said depression and delivery means to said electric motor (24);
• a rotary member (21) provided on said drive shaft to rotate with said drive shaft;
• a plurality of discharge-amount transmitting means (22) comprising small elements provided on said rotary member such that the distance between said discharge-amount transmitting means can be varied;
• a detector (23) disposed at the position of passage of said discharge-amount transmitting means, for detecting said small elements;
• a preset counter (37) connected to said detector;
• a switch (41) connected between said preset counter and said electric motor to selectively deenergize said electric motor;
• and a preset counter change-over switch (43) connecting said detector to said switch (40).

A fluid supplying device comprising:

• a peristaltic pump including depression and delivery means and an electric motor, said depression and delivery means including an elastic tube (17) for receiving fluid and an assembly of depressing members (15) for alternately constricting and relaxing said elastic tube, and a drive shaft (10) connecting said depression and delivery means to said electric motor (24);
• a rotary member (21) provided on said drive shaft to rotate with said drive shaft;
• a plurality of discharge-amount transmitting means (22) in the form of small elements provided on said rotary member such that the distances between said discharge-amount transmitting means can be varied;
• a detector (23) disposed at the position of passage of said discharge-amount transmitting means for detecting said small elements;
• a preset counter (37) connected to said detector;
• a switch (40) connected between said preset counter and said electric motor to selectively deenergize said electric motor;
• a change-over switch (39) provided between and electric source and a circuit including a preset counter change-over switch (43) connecting said switch (40) to said detector, for turning off said electric source.