Surgery – Respiratory method or device – Means for mixing treating agent with respiratory gas
Patent
1992-09-23
1994-06-14
Burr, Edgar S.
Surgery
Respiratory method or device
Means for mixing treating agent with respiratory gas
12820323, A61M 1500
Patent
active
053200950
DESCRIPTION:
BRIEF SUMMARY
FIELD OF INVENTION
The invention relates to a device for use with the inhalation of powdered materials contained in rod-shaped capsules, of the type, comprising a mixing chamber having substantially tangentially directed air inlet openings, said mixing chamber having one end in communication with a mouth piece and the other end in communication with a capsule receiving cavity, the latter being formed in conformity with the longitudinal sectional shape of a capsule and having at least one longitudinal end a passage opening for a transversely (=in the longitudinal direction of the capsule receiving cavity) reciprocating piercing needle, and wherein the part of the device comprising the mouth piece is mounted to turn relative to the capsule receiving cavity comprising part of the device between a closed ready for use-position and an opened position permitting the insertion of a capsule.
BACKGROUND
Such devices are already known in various embodiments. A typical example of such a well-known device is disclosed in NL-A-176837 and NL-A-179345.
With this well-known device the mouth piece comprising part of the device is rotatably mounted--about an axis that is positioned excentrically to its longitudinal axis--relative to the other part of the device, which comprises the mixing chamber, the capsule-receiving cavity and the piercing needle(s).
The insertion of a capsule in the receiving cavity is rather difficult, because this is to take place via the end of the mixing chamber facing the mouth piece. The removal of an emptied capsule may also be difficult.
Another typical example of a well-known device of the type above referred to is disclosed in EP-A-0041783. With this well-known device the mouth piece forms a part which may be removed from the rest of the device, so that the device may be loaded with a fresh capsule and an emptied capsule may be removed therefrom by taking the mouth piece off. Moreover there are provisions with this well-known device to jammingly hold a capsule within the receiving cavity. For this purpose the walls of the capsule receiving cavity are provided with ribs. The piercing of the capsule is effected automatically when the device is closed by placing the mouth piece, whereby the mouth piece actuates the piercing needle(s) and moreover--upon retraction of the piercing needle(s)--actuates an ejecting member. This means that when the device is closed upon placing a capsule, the latter will be automatically pierced and then, for direct use, ejected into the mixing chamber. Thus the closed position is also the use-position. Consequently it is not possible to place a capsule for later use i.e. to postpone piercing of the capsule until the moment at which the device is actually used.
SUMMARY OF THE INVENTION
The invention aims at providing an improved device of the type under consideration.
In accordance with one aspect of the invention an inhalation device of the type defined in the first part of claim 1 and disclosed in NL-A-176837 (vide also NL-A-179345) is provided, which is characterized in that the mouth piece is integrally formed with the mixing chamber, whereas the capsule receiving cavity is provided in a bottom section which closes the mixing chamber in the closed or ready for use-position and is made part of said other part of the device. As a result of this the accessibility of the receiving cavity has been improved, so that a capsule can now be easily put into its seat. Moreover cleaning has become easier.
In accordance with a second aspect of the invention an inhalation device of the type defined in the first part of claim 2 and disclosed in EP-A-0041783 is provided, which is characterized in that the mouth piece consists of two sections, one of which forms part of one of the movably connected body parts and the other of which is mounted for a sliding movement relative to said first section between a retracted, inactive position and an extended active position, wherein the second mouth piece section carries the piercing needle(s) and the ejecting member, whereas the body
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patent: 3918451 (1975-11-01), Steil
patent: 3991761 (1976-11-01), Cocozza
patent: 4116195 (1978-09-01), James
patent: 4627432 (1986-12-01), Newell
patent: 4884565 (1989-12-01), Cocozza
Nijkerk Alfred J.
Schram Jarig E.
Sinot Sander J.
Burr Edgar S.
Pharmachemie B.V.
Raciti Eric P.
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