Measuring and testing – Liquid level or depth gauge – Float
Reexamination Certificate
2008-09-02
2008-09-02
Williams, Hezron E. (Department: 2856)
Measuring and testing
Liquid level or depth gauge
Float
C073S313000, C073S29000R, C073S305000, C073S322500, C340S623000, C340S624000
Reexamination Certificate
active
11328839
ABSTRACT:
A liquid level sensor for measuring liquid levels in underground and above ground containers includes a frame formed to have an elongate hollow tubular configuration that encloses a cavity. A cam pivot has an end extending into the cavity from a first inner wall portion of the frame. A cam is arranged to be pivotal about the end of the cam pivot. A float is placed in the cavity. A spring is arranged to bias the cam arm into contact with the float to force a side portion of the float into a locked position in frictional engagement with the second inner wall portion of the frame. A cam actuator pivotally mounted in a lower end portion of the frame exerts a force on the cam arm to release the float from the locked position when the lower end of the frame contacts the container bottom.
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Fling John J.
Fling William F.
Lynn & Lynn
Shah Samir M.
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