N / C 100 5ml needleless plastic syringes, can be used multiple times, suitable for scientific laboratory, metering, watering, adding water, refueling

£9.9
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N / C 100 5ml needleless plastic syringes, can be used multiple times, suitable for scientific laboratory, metering, watering, adding water, refueling

N / C 100 5ml needleless plastic syringes, can be used multiple times, suitable for scientific laboratory, metering, watering, adding water, refueling

RRP: £99
Price: £9.9
£9.9 FREE Shipping

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Description

the downstream tip of the sonic nozzle 4 defining the first convergence 5 (in turn comprising constrictions 5a and 5b), is generally coincident with the central longitudinal axis of the particle inlet passage 10. particles can be delivered at a large range of velocities with potentially non-uniform spatial distribution across the target surface.

mm, the good spread of the particles across a target area substantially equal to the area of the nozzle bore 3 at the nozzle exit 2 will be appreciated. Download PDF Info Publication number USRE43824E1 USRE43824E1 US13/077,571 US200213077571A USRE43824E US RE43824 E1 USRE43824 E1 US RE43824E1 US 200213077571 A US200213077571 A US 200213077571A US RE43824 E USRE43824 E US RE43824E Authority US United States Prior art keywords gas particles nozzle syringe convergence Prior art date 2001-01-11 Legal status (The legal status is an assumption and is not a legal conclusion. describes a needleless syringe that delivers pharmaceutical particles entrained in a supersonic gas flow. this embodiment provides a form of particle “injection” and gives greater flexibility as to where the particles can be introduced since the requirement for sub-atmospheric pressure is dispensed with.The instrument was completely successful in providing anesthesia in thirty-six of the forty-five procedures.

this embodiment because there is no chamber 8 , there is no second convergence as such and the gas flow path diverges from the point of minimum cross-section of the first convergence 5 ′ to the cross-section of the nozzle bore 3 .shows a second embodiment of a syringe in which the nozzle, instead of having a substantially parallel-sided bore, has a distinct divergence.

This problem was overcome by increasing the diameter of the upstream parallel exit nozzle section to accommodate the higher gas flow rates.the relationship between the area of the first and second convergences (or the relationship between the area of the first convergence and the area of the nozzle in the fourth embodiment) is thought to be significant.

is a top plan view of the target area of a gel target, a side cross-sectional view through the gel target and an enlarged side cross-sectional view through the gel target after the firing at it of particles from the syringe shown in FIG. the preferred driver gas is helium because it gives much higher gas velocity than air, nitrogen or CO 2 . As can be seen, the bore 3 of the nozzle is substantially parallel-sided, apart from a short taper at its upstream end. By avoiding the formation of a substantial concentration of the particles within the core of the target area with no or few particles around the boundary of the target area, increased payloads of particles may be delivered without the central core of the target area becoming overloaded with particles. The springs of currently marketed and historical devices may be compressed by operator muscle power, hydraulic fluid, built-in battery-operated motors, compressed air or gas, and other means.The radially innermost end of the particle inlet passage 10 opens into the particle entrainment chamber 8 and the radially outer end of the passage 10 is arranged to communicate with a particle source 11 containing a payload of particles.



  • Fruugo ID: 258392218-563234582
  • EAN: 764486781913
  • Sold by: Fruugo

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