Liquid supply device
OwnerTakeo YAJIMA, Hiroyuki MURAOKAinventors
Life of this patent
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Abstract
A liquid supply device causes a tubephragm 15 as a first flexible member to expand to inject a liquid into a pump chamber 16, and causes the tubephragm 15 to contract to discharge the liquid in the pump chamber 16 to an outside, the device including: a medium accommodation case 28 having a bellows 31 as a second flexible member, the bellows partitioning a medium accommodation chamber 32 communicating with a pump accommodation chamber 17 and an air chamber 33; a drive mechanism 27 provided with a rod 44a; an electric motor 46 as a drive member for causing the rod 44a to reciprocate axially; and a pressure adjustment mechanism 60 for reducing a pressure in the air chamber 33 when the bellows 31 is contracted to expand the tubephragm 15 via a liquid medium M.
Claims13
A liquid supply device arranged in a pump case, having a first flexible member for partitioning a pump chamber and a pump accommodation chamber, increasing a volume of the pump chamber to inject a liquid into the pump chamber, and reducing the volume of the pump chamber to discharge the liquid in the pump chamber to an outside, the liquid supply device comprising:
- a media accommodation case having a second flexible member for partitioning a medium accommodation chamber communicating with the pump accommodation chamber and an air chamber;
- a liquid medium filled in the pump accommodation chamber and the medium accommodation chamber;
- a drive member reciprocating a rod in a discharge direction of supplying the liquid medium from the medium accommodation chamber to the pump accommodation chamber and an injection direction of returning the liquid medium from the pump accommodation chamber to the medium accommodation chamber, the rod being attached to the second flexible member;
- and
- a pressure adjustment mechanism for reducing a pressure of the air chamber when the rod is driven in the injection direction to reduce the volume of the air chamber.
A liquid supply device arranged in a pump case, having a flexible member for partitioning a pump chamber and an air chamber, increasing a volume of the pump chamber to inject a liquid into the pump chamber, and reducing the volume of the pump chamber to discharge the liquid in the pump chamber to an outside, the liquid supply device comprising:
- a drive member for reciprocating a rod between a discharge direction of discharging the liquid in the pump chamber to the outside and an injection direction of injecting the liquid into the pump chamber, the rod being attached to the flexible member;
- and
- a pressure adjustment mechanism for reducing a pressure of the air chamber when the rod is moved in the injection direction to reduce the volume of the air chamber.
Dependencies are inferred from the claim text.