Resources Contact Us Home
Browse by: INVENTOR PATENT HOLDER PATENT NUMBER DATE
 
 
Liquid level control system










Image Number 3 for United States Patent #4211249.

A liquid level control system is disclosed for use with a swimming pool or the like having a pool reservoir, a main drain or outlet, usually at the bottom of the reservoir, and an outlet located at a predetermined water maintenance level for the pool. The system includes fluid amplifier means positioned relative to the pool reservoir for sensing an interface between liquid and gas, or water and air, at the surface of the water in the pool and developing a fluid pressure signal when the interface falls below a predetermined level. Liquid circulation means, including a skimmer at the surface of the water in the pool reservoir is provided for circulating water from the pool reservoir between the outlet and an inlet. A portion of the water circulated by the circulation means is channeled to the fluid amplifier means for operating the same. Fluid valve means is provided which is responsive to the fluid pressure signal developed by the fluid amplifier means. The system further includes water supply means for adding water to the pool from an external supply thereof when the fluid valve means senses the fluid pressure signal developed by the fluid amplifier means.








 
 
  Recently Added Patents
Interconnect, bus system with interconnect and bus system operating method
Vacuum cleaner filter adapter ring
Analogue-to-digital converter
Light modulators and optical apparatuses including the same
Signal processing apparatus and methods
Synchronization of sound generated in binaural hearing system
Dental fillers including a phosphorus containing surface treatment, and compositions and methods thereof
  Randomly Featured Patents
Retractable rear view mirror
Control device for differential speed steering of a vehicle
Method of treating coccidiosis with antibiotic A-32887K
System for automatic notification of the receipt of messages in an electronic mail system
Stay lit socket structure for LED light bulbs
Nickel ink and conductor film formed of nickel ink
Magnetizable composite particles based on cross-linked organopolysiloxane, process for preparation thereof and their application in biology
Isoxazoline, isothiazoline and pyrazoline factor Xa inhibitors
Multitube falling-film reactor
Set of dough hooks