Electricity: motive power systems – Automatic and/or with time-delay means – Level of fluid or granular material
Reexamination Certificate
2005-12-16
2008-09-30
Duda, Rina I (Department: 2837)
Electricity: motive power systems
Automatic and/or with time-delay means
Level of fluid or granular material
C318S139000, C417S018000, C417S036000
Reexamination Certificate
active
07429842
ABSTRACT:
A control system for a sump pump driven by an AC motor includes an AC power line having an input adapted for connection to an AC power source and an output adapted for connection to the AC drive motor. A controller is connected to a controllable switch in the AC power line, to control the opening and closing of that switch. Redundant float switches are coupled to the controller and adapted to be mounted in a sump to supply the controller with a signals when the liquid in the sump rises to a selected level. A timer in, or coupled to, the controller alters the control signal to open the controllable switch if the liquid level in the sump remains above the selected level for a preselected time period.
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Oram James W.
Schulman Alan M.
Duda Rina I
Nixon & Peabody LLP
Schulman Alan M.
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