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    • 10. 发明申请
    • SILENCING DEVICE AND METHOD FOR NEEDLELESS SYRINGE
    • 用于无瞄准器的静音装置和方法
    • WO03011380A2
    • 2003-02-13
    • PCT/GB0203412
    • 2002-07-25
    • POWDERJECT RES LTDKENDALL MARK ANTHONY FERNANCE
    • KENDALL MARK ANTHONY FERNANCE
    • A61M5/24A61M5/30
    • A61M5/3015A61M5/24
    • The invention provides a silencer and silencing method which ensures adequate silencing with no deleterious increase in back pressure (which creates a lift-off force) or decrease in device performance. Pressurised gas is supplied to a driver chamber by a bleed-hole having an effective bleed-hole area and, during use of the device for particle delivery, gas is vented to the atmosphere via a silencer having an effective venting area. The bleed-hole area and venting area are chosen to ensure that the mass flow rate of gas through the effective venting are is substantially equal to or greater than the mass flow rate of gas through the effective bleed-hole area. This ensures that there is no build up of gas in the silencer device which tends to increase back pressure and hence lift-off force. Preferred embodiments of the device comprise a silencer having a large volume and a small particle exit opening. Further, there is disclosed an embodiment using one or more transfer ducts to assist particle mixing.
    • 本发明提供了一种消音器和消音方法,其确保足够的消音而没有有害的背压增加(产生剥离力)或降低了装置性能。 通过具有有效排气孔区域的排放孔将加压气体供应到驱动器腔室,并且在使用用于颗粒输送的装置期间,通过具有有效排气区域的消音器将气体排放到大气中。 选择排气孔面积和排气面积以确保通过有效排气的气体的质量流率基本上等于或大于通过有效排气孔面积的气体的质量流率。 这确保了在消音器装置中没有积聚气体,其倾向于增加背压和因此提升力。 该装置的优选实施例包括具有大体积和小颗粒出口的消音器。 此外,公开了使用一个或多个传输管道来辅助颗粒混合的实施例。