| Metropolitan Industries, Inc. Patent applications |
| Patent application number | Title | Published |
|---|
| 20110273288 | Pump Control Unit - A pump control system includes a controller coupled to first and second pressure sensors. The sensors couple serial pressure related information to the controller. The controller can evaluate respective liquid levels, in response to received pressure related information from the sensors. A current sensor coupled to the controller can provide signals indicative of operation of one or more pumps coupled to the controller. The controller includes circuits to detect the presence of predetermined faults and to emit an audible fault indicator in response thereto. | 11-10-2011 |
| 20110064564 | Pumps or Generators with Flow-Through Impellers - An axial flow pump includes a perforated impeller through which fluid being pumped flows. The pump can carry a stator which can interact with magnetic elements rotatably carried with the impeller to produce rotation thereof. | 03-17-2011 |
| 20090162211 | Strain Gauge Pump Control Switch - A control switch incorporates a solid state transducer, a strain gauge. The transducer responds to a local environmental condition, such as fluid level, or pressure and exhibits a parameter change which can be detected as an electrical output. Control circuits coupled to the transducer can sense the parameter change and switch a source of electrical energy to a load in response thereto. | 06-25-2009 |
