Stepped plunger for use with an ultrasonic sensor

Details Stepped plunger for use with an ultrasonic sensor Stepped plunger for use with an ultrasonic sensor

G - Physics

01

S

G01S 15/08 (2006.01) B41F 31/08 (2006.01) G01S 7/539 (2006.01) B67C 9/00 (2006.01)

Patent

CA 2466600

An improved plunger (40) for fluid dispensing cartridges used in automated dispensing systems. The plunger (40) helps control the reflection of ultrasonic signals used to sense the position of the plunger (40) as it moves within the cartridge tube (60). The plunger (40) has a convex bottom, ink- facing surface (42) and a top surface (48) comprising one or more flat, horizontal surfaces. In the preferred embodiment, the horizontal surfaces are concentric steps (50).

L'invention concerne un plongeur amélioré (40) destiné à des cartouches de distribution utilisées dans des systèmes de distribution automatique. Le plongeur (40) aide à réguler la réflexion des signaux ultrasonores utilisés afin de capter la position du plongeur (40) lorsqu'il se déplace à l'intérieur du tube de cartouche (60). Ce plongeur (40) possède un fond convexe, une surface faisant face à l'encre (42) et une surface supérieure (48) comprenant une ou plusieurs surfaces plates et horizontales. Dans un mode de réalisation préféré, les surfaces horizontales consistent en des gradins concentriques (50).

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