Air and liquid supplying device for endoscopes

An air and liquid supplying device for an endoscope which includes an operating section, an insert section extending from the operating section, and a feed air passage and a feed liquid passage extending from the operating section to the distal end of the insert section, said device comprising;:

• an air pump;
• a first feed liquid tank containing a first liquid;
• first switching means connected to the feed air passage and the feed liquid passage;
• connecting means including an air supply passage connecting the pump and the first switching means, a pressurizing passage diverging from the air supply passage and communicating with the first feed liquid tank, and a liquid supply passage containing the first feed liquid tank and the first switching means, said first switching means being capable of being shifted between a first position where the air supply passage and the feed air passage are connected so that air from the pump is fed into the feed air passage, and a second position where the feed air passage is cut off and the liquid supply passage and the feed liquid passage are connected so that the first liquid is fed into the feed liquid passage;
• a second feed liquid tank containing a second liquid and connected to the air supply passage between the pump and the pressurizing passage;
• and
• second switching means connected to the air supply passage between the second feed liquid tank and the pressurizing passage, and adapted to switch the device to supply air to the air supply passage and to supply the second liquid to the air supply passage.