×

FLUID LEVEL DETECTION DEVICE

  • US 20100223993A1
  • Filed: 03/04/2010
  • Published: 09/09/2010
  • Est. Priority Date: 03/06/2009
  • Status: Abandoned Application
First Claim
Patent Images

1. A fluid level detection device comprising:

  • a float which floats in a bio fuel and changes its position in accordance with a change in height of a surface of the bio fuel;

    a float arm coupled to the float at one end thereof; and

    a sensor which detects a rotating amount of the float arm that rotates in accordance with a change in position of the float,wherein the sensor includes;

    a circuit board on which a resistor is disposed; and

    a sliding contact coupled to the other end of the float arm so as to rotate in accordance with a rotation of the float arm, and that has a contact portion, an electrical connecting position of the contact portion with respect to the resistor on the circuit board being changed in accordance with a rotation of the sliding contact to detect the rotation amount of the float arm based on an electrical potential difference between voltages applied to the resistor and the contact portion;

    wherein the float arm is made of a stainless steel based material;

    wherein the contact portion of the sliding contact and a metallic piece extended from the contact portion are made of nickel silver, and a Ni plating layer is applied to surfaces of the contact portion and the metallic piece; and

    wherein a current of 10 ms to 15 ms per cycle is supplied to the resistor and the contact portion.

View all claims
  • 1 Assignment
Timeline View
Assignment View
    ×
    ×