Daicel Corporation

Hiromitsu Iga

Takashi Hasegawa

Hiroshi Miyazaki

Yuzo Yamamoto

Katsuya Miki

Yosuke Morishita

Takamasa Suzuki

Shingo Atobe

Yayoi Hirayama

Actuator for needleless injector

Needleless injector

A needleless injector pressurizes a substance to be injected having an ejection pressure defined as a pressure of the substance to be injected ejected through an ejection port. The ejection pressure is raised to a first peak pressure after pressurizing is started, is lowered to a pressure lower than the first peak pressure afterward, and then is raised to a second peak pressure again. An on-completion reached depth that is an on-completion reached depth of the substance when the pressurizing portion completes pressurizing is adjustable, the on-completion reached depth being increased along with increase of the first peak pressure and being increased along with reduction of a length between peaks from a first timing at which the ejection pressure reaches the first peak pressure to a second timing at which the ejection pressure reaches the second peak pressure.

Needleless injector, method of adjusting on-completion reached depth with needleless injector, and ejection parameter calculation program for needleless injector

An injector includes an encapsulating portion configured to encapsulate a substance intended for injection, a first application portion configured to combust ignition charge and discharge a combustion product thereby applying a primary ejection energy to the substance intended for injection that is encapsulated in the encapsulating portion, an energy accumulation portion configured to accumulate an energy to be further applied to the substance intended for injection, the energy being different from the primary ejection energy applied by the first application portion. The injector also includes a second application portion configured to release the energy accumulated in the energy accumulation portion by using the discharged combustion product thereby applying, as a secondary ejection energy, the released energy to the substance intended for injection. With this configuration, the substance intended for injection can be caused to suitably reach the target region without affecting the substance intended for injection to be ejected.

Injector

Control unit for needleless injector

Growing community of inventors

Hyogo, Japan

Hiromitsu Iga