Title:
LIQUID SUPPLY DEVICE
Document Type and Number:
Japanese Patent JP2017031881
Kind Code:
A
Abstract:
PROBLEM TO BE SOLVED: To provide a liquid supply device excellent in liquid discharge accuracy.SOLUTION: A liquid supply device 10 has a first pump 11 to a third pump 13, and is used for supplying a liquid to a coating tool 15. A first check valve 21 closes a first supply channel 16 when the first pump 11 is discharge-operated to discharge the liquid from a first discharge port 11b, and opens the first supply channel 16 when the second pump 12 is discharge-operated to discharge the liquid in a second pump chamber 42 from the first discharge port 11b through a first pump chamber 41. The second check valve 22 closes a second supply channel 17 when the second pump 12 is discharge-operated, and opens the second supply channel 17 when the liquid in a third pump chamber 43 is supplied to the second pump chamber 42 while the second pump 12 is suction-operated. When the second pump chamber 42 is suction-operated, negative pressure is prevented from generating in the second pump chamber 42.SELECTED DRAWING: Figure 1
Inventors:
MURAOKA HIROYUKI
Application Number:
JP2015152520A
Publication Date:
February 09, 2017
Filing Date:
July 31, 2015
Export Citation:
Assignee:
KOGANEI LTD
International Classes:
F04B23/06; F04B43/08; F04B43/10; F04B49/06
Attorney, Agent or Firm:
Tsutsui International Patent Office