Patent ID: 8015871
Filing Date: 2011-09-13
Classification: G01F

Abstract:
1. A sender unit for sensing the level of remaining fuel in a fuel tank of a vehicle, the sender unit being fixable within the fuel tank to sense the level of the remaining fuel by detecting the position of a float that floats depending on the level of the liquid surface of the fuel, the sender unit comprising: a casing; a disk-shaped rotor yoke pivotably received in the casing; a ring-shaped magnet fixed to a lower portion of the rotor yoke; a stator yoke that is a magnetic body comprising two ring shaped arms and a center arm horizontally crossing a center defined by the two ring shaped arms, the stator yoke being spaced apart from a lower surface of the magnet so as to form a closed magnetic circuit together with the magnet, the center arm being formed with a gap; a magnetic sensing element fixed within the gap formed in the center arm of the stator yoke; a plate which is fixedly received in the casing and to which the stator yoke is fixed; and a rod having one side end connected to the float and the other side end penetrating through the casing and fixed to the rotor yoke, wherein the ring shaped magnet is fixed to a planar surface of the rotor yoke such that a planar surface of the ring shaped magnet opposes a planar surface of the stator yoke.