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Inhaling Apparatus

a technology of inhalation apparatus and inhalation head, which is applied in the direction of inhalators, medical devices, other medical devices, etc., can solve the problems of reducing the service life of the ejection head section, reducing the risk of liquid leakage from the orifice, and reducing the adverse effect of liquid leakag

Inactive Publication Date: 2007-10-04
CANON KK
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

[0017] Thus, according to the present invention, since the ejection port of the liquid medical agent ejecting section is arranged at a position where the pressure difference with the atmospheric pressure is smaller than the pressure difference detected by the pressure detecting section at the time of inhalation, the risk of liquid leakage from the ejecting section is minimized to by turn minimize the adverse effect of leaking liquid on the service life of the ejecting section.

Problems solved by technology

However, since the ejection head section of the apparatus is directly subjected to negative pressure that is produced by the atmospheric pressure as pressure difference at the time of inhalation, liquid can leak from the orifice also at the time of inhalation.
Then, it is no longer possible to eject droplets by a predetermined quantity.
Additionally, the ejection head section is directly subjected to negative pressure to curtail the service life of the ejection head section.
Thus, the proposed apparatus can hardly find practical applications.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

embodiment 1

[0041]FIG. 1 is a schematic perspective view showing the outer appearance of an inhaler according to the present invention. Referring to FIG. 1, there are shown an inhaler main body 1, an access cover 2 and a front cover 3, which constitute the housing of the inhaler. In FIG. 1, reference symbol 5 denotes a lock lever urged by a spring and having a claw-like part at the front end thereof that engages with a projecting section 2a arranged at the front end of the access cover 2 in order to prevent the access cover 2 from opening in operation. As the lock lever is driven to slide downward, the access cover 2 is turned around a hinge pivot (not shown) to become open by the resilience of the access cover returning spring (not shown) that urges the access cover 2. In FIG. 1, reference symbol 101 denotes a power supply switch and reference symbol 102 denotes a display LED which indicates that an ejection head cartridge (CRG) unit or a mouthpiece, which will be described in greater detail h...

embodiment 2

[0054]FIG. 10 is a schematic cross sectional view of Embodiment 2 of the present invention, which differs from Embodiment 1 only in terms of the configuration of the flow path to the pressure detecting section (the communication hole 13 communicating with the negative pressure sensor 19). In Embodiment 2, the communication hole 13 is arranged to the outside of the flow path exit 14 of the mouthpiece exit 15 located at the front end of the mouthpiece 4. With this arrangement, a negative pressure detecting flow path led to the negative pressure sensor 19 is completely separated from and arranged in parallel with the airflow path of the mouthpiece 4. When the mouthpiece 4 is mounted in the apparatus from the upper and front surface thereof, the mounting direction agrees with the direction in which the communication hole 13 comes tightly close to the negative pressure detecting flow path led to the negative pressure sensor 19. Thus, this arrangement is advantageous for preventing air fr...

embodiment 3

[0055]FIG. 11A and 11B show Embodiment 3 comprising a pressure alleviating means that is different from the narrowed flow path of Embodiment 1. A valve 30 having a size substantially same as the cross sectional area of the flow path of the mouthpiece 4 is rotatably arranged between the communication hole 13 led to the negative pressure sensor 19 and the liquid medical agent intake port 12 receiving the ejection head section 8 in the flow path of the mouthpiece 4. The valve 30 is constantly held to state where it substantially closes the flow path as it is made to abut a valve stopper 31 as illustrated in FIG. 11A. The valve 30 is opened as shown in FIG. 11B when the user starts an inhaling operation. While relatively strong negative pressure is generated in the flow path space at the side of the negative pressure sensor 19 at this time, such strong negative pressure is not generated in the flow path space at the side of the ejection head section 8. Thus, the net results will be same...

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Abstract

An inhaling apparatus is to be used by a user to inhale a liquid medical agent from an inhalation port thereof. It has a liquid medical agent ejecting section having an ejection port for ejecting a liquid medical agent as droplets and a pressure detecting section for detecting the negative pressure produced by the atmospheric pressure as pressure difference at the time of inhalation of the user for the purpose of controlling the ejection of droplets from the ejection port. The ejection port of the liquid medical agent ejecting section is arranged at a position adapted to produce a pressure difference smaller than the pressure difference with the atmospheric pressure as detected by the pressure detecting section at the time of the inhaling action of the user.

Description

TECHNICAL FIELD [0001] This invention relates to an inhaling apparatus. More particularly, it relates to an inhaling apparatus for ejecting droplets of a medical agent, an aromatic, nicotine or some other savory substance and causes the user to inhale them. BACKGROUND ART [0002] Our society is aging because of the prolonged mean life that is realized by the advancement of medicine and science in recent years. On the other hand, new diseases and infectious diseases have been found due to the changes in the living environment and the eating habits, the environmental pollution and new strains of viruses and microbes to make people anxious about their health. Particularly, in the so-called advanced countries, the increasing number of medical patients suffering from life-style related diseases, including diabetes and hypertension imposes a serious problem on the society. [0003] For example, diabetic patients have to be dosed with insulin. Conventionally, it is a general practice to injec...

Claims

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Application Information

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Patent Type & Authority Applications(United States)
IPC IPC(8): A61M11/00
CPCA61M15/0065A61M15/025A61M2205/582A61M2016/0024A61M15/0066
Inventor NOBUTANI, TOSHIYUKIIMAI, MITSURU
Owner CANON KK
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