Resources Contact Us Home
Browse by: INVENTOR PATENT HOLDER PATENT NUMBER DATE
 
 
Automatic water level monitoring system










Image Number 4 for United States Patent #4621657.

A system for maintaining a preselected water level in e.g. a swimming pool comprises a chamber (6) in communication with the pool such that the water level in the chamber corresponds to that of the pool. The chamber contains an adjustable over flow tube (15) and a vertically oriented water supply line (19) having a diaphragm valve (20) and surrounded by an annular float (29), the valve being actuated by a height adjustable overhead actuator bar (23).








 
 
  Recently Added Patents
Nacelle cover
Methods and compositions for improving photodynamic therapy through administration of lipids
Image forming apparatus forming images in response to image formation request from operation unit or external device
LED drive circuit
Method of preparing MgB.sub.2 superconducting wire and the MgB.sub.2 superconducting wire prepared thereby
Display screen with transitional icon
Aisle barrier
  Randomly Featured Patents
Combined electric guitar, amplifier and speaker
Composite implantable biocompatible vascular access port device
Electrical connector
Optical disc apparatus capable of multiple write sessions in a single track
High note intensifier for brass musical instruments
Method of constructing high yield, fine line, multilayer printed wiring board panel
Thyristor controlled dynamic voltage suppressor for electric power systems
Coated magnesium granules
Layered evaporator for use in motor vehicle air conditioners or the like, layered heat exchanger for providing the evaporator, and refrigeration cycle system comprising the evaporator
Compounding, glazing, or polishing pad with vacuum action