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SYRINGE MOVEMENT MECHANISM AND CONTROL SYSTEM THEREFOR

  • US 20100145263A1
  • Filed: 02/18/2010
  • Published: 06/10/2010
  • Est. Priority Date: 12/22/2006
  • Status: Active Grant
First Claim
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1. An electrical sensor system implemented with a movement mechanism for operating a syringe, said system detects the presence of a plunger of said syringe, said system comprising:

  • [a] at least two coaxially disposed rods 16A and 16B, said rods 16A and 16B are characterized by at least electrically conductive surface, and[b] a plunger associated unit (PAU) 20, accommodating said plunger of said syringe, said PAU 20 comprising at least;

    [1] a fastener 26, accommodating a thumb-rest plate of said plunger;

    [2] at least two flanking apertures 24A and 24B, respectively accommodating said at least two coaxially disposed rods 16A and 16B;

    [3] a pushably activated cutoff switch 28, said switch 28 is activated/deactivated by said fastener 26;

    [4] at least two probes 29A and 29B, said probes 29A and 29B are electrically coupled to the respective electric terminals of said switch 28;

    wherein said PAU 20 is slidably translatable along said at least two coaxially disposed rods 16A and 16B;

    wherein said at least two probes 29A and 29B dynamicly form an electrical contact with said electrically conductive surface of said rods 16A and 16B, wherein said contact is maintained during a contiguous sliding of the former along said electrically conductive surface of the latter;

    wherein upon introduction of said thumb-rest plate of said plunger in-between said PAU 20 and said fastener 26, said cutoff switch 28 is activated/deactivated;

    whereas upon removal of said thumb-rest plate of said plunger, said cutoff switch 28 is respectively deactivated/activated;

    wherein an interruptible electrical circuit is formed between said rods 16A and 16B whereby allowing continuously detecting the presence of said plunger in said PAU 20 during said slidable translation of the latter along said electrically conductive surface of the former.

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