Resistor card fuel level sender with float arm actuator
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United States of America Patent
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Aug 30, 1994
Grant Date -
N/A
app pub date -
May 14, 1993
filing date -
May 14, 1993
priority date (Note) -
In Force
status (Latency Note)
Importance
Abstract
An improved liquid level fuel sender of the type having a resistor card mounted in a plastic housing affixed to the interior of a fuel tank, and a float arm assembly connected to pivot relative to the housing to slide a contact wiper over the resistor card to generate signals corresponding to fuel level. The connecting structure and bearing surfaces of the components of the fuel sender are designed to increase the stability, uniformity, accuracy and repeatability of the sender over its life. In one embodiment the plastic housing defines a first pivot bearing for the float arm assembly, and the ground terminal defines a second pivot bearing for the float arm assembly spaced from the first pivot bearing to improve rotational stability of the float arm assembly. A support arm and wiper arm assembly are mounted therebetween, the support arm connected to the float arm and freely rotating on an axial bearing surface on the housing to transfer float arm motion to the conductive wiper arm. The mounting and bearing surfaces for the support arm and ground terminal are located to improve the precision of their alignment relative to one another and the resistor card, ensuring uniform wiper arm contact forces.
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