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US 8,523,806 B2Granted
Sprayer
AssigneeTerumo Kabushiki Kaisha
InventorKoichi Hayakawa
Life of this patent
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Abstract
A sprayer is capable of inhibiting or preventing clogging occurring in a nozzle upon ejection of a liquid through the nozzle. A sprayer includes liquid supply for separately supplying a first liquid and a second liquid different in liquid composition, and a nozzle. The nozzle includes a first flow path and a second flow path along which passes the first liquid and the second liquid supplied from the liquid supply. In addition, the nozzle includes a third flow path along which passes a gas. A merge part is provided at which the first flow path and the second flow path merge at their respective halfway parts. A vent is provided at the merge part for allowing the gas which has passed through the third flow path to flow into the merge part.
Claims21
A sprayer comprising a first liquid supply containing a first liquid;
- a second liquid supply containing a second liquid, the first and second liquids having liquid compositions different from one another;
- a nozzle comprising a nozzle main body and a nozzle head connected to one another;
- the nozzle head comprising an ejection port passing through a distal end wall at a distal end of the nozzle head;
- the nozzle body comprising a first tube, a second tube and a third tube;
- the first tube possessing a lumen forming a first liquid flow path in fluid communication with the first liquid supply;
- the second tube possessing a lumen forming a second liquid flow path in fluid communication with the second liquid supply;
- the third tube possessing a lumen forming a gas path connectable to a gas source;
- a fourth tube constituting a tubular merge part possessing a lumen open at a distal end of the fourth tube, the fourth tube being positioned in the lumen of the third tube, the distal end of the fourth tube contacting the distal end wall of the nozzle head with the lumen of the fourth tube opening into the ejection port;
- the first tube comprising a distal end;
- the second tube comprising a distal end the distal end of the first tube and the distal end of the second tube being connected to the fourth tube, with the lumen of the first tube and the lumen of the second tube in communication with the lumen of the fourth tube so that the first and second liquids are mixed together in the fourth tube;
- and
- a vent disposed at a point upstream of the distal end of the fourth tube and downstream of the tubular merge part of the fourth tube to introduce the gas into the lumen of the fourth tube;
- and/or disposed at a point upstream of the distal end of the second tube to introduce the gas into the lumen of the second tube.
10 more elements
A sprayer comprising:
- supply means for separately supplying a first liquid and a second liquid comprising different liquid compositions;
- a nozzle comprising an outer tube, the nozzle also comprising a first liquid flow path in fluid communication with the supply means and along which the first liquid flows, the nozzle also comprising a second liquid flow path in fluid communication with the supply means and along which the second liquid flows, the nozzle also comprising a gas flow path for gas flow, the nozzle also comprising an inner tube possessing an interior, the inner tube being connected to the first flow path and the second flow path so that the first flow path and the second flow path merge together into the interior of the inner tube to mix together, in the interior of the inner tube, the first liquid flowing along the first liquid flow path and the second liquid flowing along the second liquid flow path to form a mixed liquid;
- the inner tube, first flow path, second flow path and gas flow path being positioned in the outer tube;
- the nozzle also comprising a distal end wall at a distal end of the outer tube and an ejection port passing through the distal end wall, the inner tube possessing a distal end connected to the distal end wall so the interior of the inner tube opens into the ejection port;
- and
- at least one vent communicating the interior of the inner tube with the gas flow path so that the gas passing along the gas flow path flows through the at least one vent and enters the interior of the inner tube.
3 more elements
A method of applying a mixed liquid to a living body comprising:
- supplying a first liquid along a first liquid path to an inner tube of a nozzle, the inner tube and the first liquid path being located within an outer tube;
- supplying a second liquid along a second liquid path different from the first liquid path to the inner tube of the nozzle to mix the first liquid and the second liquid together in the inner tube to produce a mixed liquid, the first and second liquids comprising different liquid compositions, the second liquid path being located within the outer tube, the nozzle comprising a distal end wall at a distal end of the outer tube, the distal end wall being provided with a through hole forming an ejection port, the inner tube possessing a distal end connected to the distal end wall so an interior of the inner tube opens into the ejection nozzle;
- supplying gas to the interior of the tube;
- and
- ejecting the mixed liquid and the gas through the distal end of the inner tube and through the ejection port of the nozzle at the living body.
2 more elements
Dependencies are inferred from the claim text.