FLUID LEVEL DETECTION DEVICE
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.
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Accused Products
Abstract
A fluid level detection device includes a float floating in a bio fuel, a float arm, and a sensor for detecting a rotating amount of the float arm. The sensor has a circuit board and a sliding contact having a contact portion. The float arm is made of a stainless steel based material. 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 a surface of the nickel silver. A current of 10 ms to 15 ms per cycle is supplied to the resistor and the contact portion.
26 Citations
3 Claims
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1. A fluid level detection device comprising:
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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 Dependent Claims (2, 3)
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Specification