Abstract: A fluid delivery apparatus comprises a first piston body, a second piston body, a fluid delivery pipe, and a sealing element. The first piston body has a first through hole, a first connecting portion, an accommodation space and a buffer space. The second piston body has a second through hole and a second connecting portion disposed inside the accommodation space. The fluid delivery pipe is accommodated in the first through hole and the second through hole, and movable between a first position and a second position. The sealing element encircles the fluid delivery pipe. When the fluid delivery pipe is at the first position, the sealing element is accommodated in the accommodation space. When the fluid delivery pipe is at the second position, a first part of the sealing element is accommodated in the accommodation space, and a second part of the sealing element is accommodated in the buffer space.

Abstract: An assembly method of an apparatus suitable for pressurized liquid transfusion is disclosed. In one step, a nozzle is to be inserted into the through hole of an elastomeric ring. Because the dimension of the nozzle is larger than the through hole, the internal wall of the elastomeric ring is tensioned and deformed so as to fit the nozzle. In one step, the elastomeric ring along with the nozzle is inserted into a receptacle. The dimension of the outer contour of the elastomeric ring needs to be decreased so as to be accommodated by the receptacle. Due to the flexibility of the elastomeric ring, it resumes at least partially to its original shape. Therefore, proper seal is created and maintained between the elastomeric ring and the nozzle such that leakage and pressure loss may be prevented. The foregoing is capable of working under high-pressured environment for prolonged use.

Abstract: An apparatus suitable for pressurized liquid transfusion is disclosed. The apparatus includes a nozzle assembly enclosed by the combination of a casing and a check nut. The nozzle assembly includes an elastomeric ring and a nozzle received by the combination of a cap and a receptacle. The elastomeric ring surrounds the nozzle and a proper seal is created therebetween. The dimension of the internal contour of the elastomeric ring is a bit smaller than the nozzle. The elastomeric ring is stretched so as to receive the nozzle. Additional processing may be applied to the elastomeric ring to achieve a different type of proper seal. Pressurized liquid passes through the apparatus so as to be transfused. The aforementioned seal serves to avoid leakage or pressure loss at the apparatus so as to avoid undesired aerosolization effects of an aerosolizer the apparatus is installed in.

Abstract: A fluid delivery apparatus comprises a first piston body, a second piston body, a fluid delivery pipe, and a sealing element. The first piston body has a first through hole, a first connecting portion, an accommodation space and a buffer space. The second piston body has a second through hole and a second connecting portion disposed inside the accommodation space. The fluid delivery pipe is accommodated in the first through hole and the second through hole, and movable between a first position and a second position. The sealing element encircles the fluid delivery pipe. When the fluid delivery pipe is at the first position, the sealing element is accommodated in the accommodation space. When the fluid delivery pipe is at the second position, a first part of the sealing element is accommodated in the accommodation space, and a second part of the sealing element is accommodated in the buffer space.

Abstract: A locking mechanism for an aerosol drug delivery device includes a first housing, a second housing, a screw and a fastening member. The first housing has a contact portion and a fastening space formed beside the contact portion. The second housing is rotatably connected with the first housing and is capable of rotating relative to the first housing along a rotation axis. The screw is rotatably connected with the second housing and is capable of rotating relative to the second housing along a central axis parallel to the rotation axis. The fastening member is movably connected with the screw and capable of being driven by the screw to move toward the contact portion. The fastening member includes a fastening portion capable of being displaced when contacting with the contact portion and entering into the fastening space to limit the relative rotation between the first housing and the second housing.

Abstract: An assembly method of an apparatus suitable for pressurized liquid transfusion is disclosed. In one step, a nozzle is to be inserted into the through hole of an elastomeric ring. Because the dimension of the nozzle is larger than the through hole, the internal wall of the elastomeric ring is tensioned and deformed so as to fit the nozzle. In one step, the elastomeric ring along with the nozzle is inserted into a receptacle. The dimension of the outer contour of the elastomeric ring needs to be decreased so as to be accommodated by the receptacle. Due to the flexibility of the elastomeric ring, it resumes at least partially to its original shape. Therefore, proper seal is created and maintained between the elastomeric ring and the nozzle such that leakage and pressure loss may be prevented. The foregoing is capable of working under high-pressured environment for prolonged use.

Abstract: An apparatus suitable for pressurized liquid transfusion is disclosed. The apparatus includes a nozzle assembly enclosed by the combination of a casing and a check nut. The nozzle assembly includes an elastomeric ring and a nozzle received by the combination of a cap and a receptacle. The elastomeric ring surrounds the nozzle and a proper seal is created therebetween. The dimension of the internal contour of the elastomeric ring is a bit smaller than the nozzle. The elastomeric ring is stretched so as to receive the nozzle. Additional processing may be applied to the elastomeric ring to achieve a different type of proper seal. Pressurized liquid passes through the apparatus so as to be transfused. The aforementioned seal serves to avoid leakage or pressure loss at the apparatus so as to avoid undesired aerosolization effects of an aerosolizer the apparatus is installed in.