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Metering needle assembly

  • US 4,719,825 A
  • Filed: 03/24/1986
  • Issued: 01/19/1988
  • Est. Priority Date: 03/24/1986
  • Status: Expired due to Fees
First Claim
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1. A tattooing device, comprising:

  • a needle having a passageway therein;

    means for holding a liquid in communication with the passageway, said holding means includes a plunger having a first end and a second end;

    means for dispensing a selected portion of the liquid, said dispensing means includes;

    a plunger pin having a first end attached to a stationary nut member for engagement with a threaded rod, a second end of said pin being in engagement with said second end of said pin being in engagement with said second end of said plunger, wherein rotational movement of the threaded rod is converted to linear displacement of said plunger along the longitudinal axis;

    a clutch member connected to the threaded rod to rotate the threaded rod about a longitudinal axis upon activation of the clutch member;

    a cam member operatively fixed to the clutch member to permit activation of the clutch member; and

    a spring means adjacent the cam member to provide rotational movement to the cam member.

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