Signals and indicators – Indicators – Fluid flow
Reexamination Certificate
2008-07-22
2008-07-22
Smith, R. A. (Department: 2841)
Signals and indicators
Indicators
Fluid flow
C116S264000, C116SDIG043, C137S557000
Reexamination Certificate
active
07401572
ABSTRACT:
A view around flow indicator comprising a housing, a turbine wheel, a cylinder, and a visually perceptible pattern on the outside surface of the cylinder is disclosed. The housing has an inside surface defining a flow path. The inside surface of the housing forms a generally circumferentially extending annular recess. The turbine wheel comprises a hub positioned on the longitudinal axis, a ring positioned in the annular recess, a plurality of radially extending turbine blades connecting the hub with the ring, and plurality of magnets carried by the ring. The cylinder is mounted on an outside surface of the housing for rotation around the longitudinal axis of the flow path. The cylinder carries a plurality of magnets which are magnetically coupled to the plurality of magnets carried by the ring. The visually observable pattern on the outside surface of the cylinder permits rotation of the cylinder to be visually ascertained.
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Casperson John R.
Smith R. A.
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