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
Liquid crystal display device
System and method for performing image correction
Toner cartridge and image forming apparatus including the same
Portable gaming device and gaming system combining both physical and virtual play elements
Vehicle display system or projection display for a motor vehicle, and calibration method
Listing recommendation using generation of a user-specific query in a network-based commerce system
Aware manufacturing of integrated circuits
  Randomly Featured Patents
Bank drive-through indicator light
Dental implant package
Ultrasonically powered surgical instruments with rotating cutting implement
Method to fabricate a closed cell trench power MOSFET structure
Apparatus for packaging compressible articles
Vortex method
Control circuit and method for maintaining high efficiency in a buck-boost switching regulator
Storage rack for stoneware
Embedded parity coding for data storage
Image-forming apparatus