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
Client-managed group communication sessions within a wireless communications system
System for alarming upon occurrence of secession of smart key for vehicles
Method and arrangement for controlling semiconductor component
Dynamic load profiling in a power network
Lubricant composition and antioxident composition
System and method to assess and report the health of landing gear related components
Network client validation of network management frames
  Randomly Featured Patents
Clock synchronizing circuit
Equipment and method for feeding liquid gradient in nano/micro liquid chromatography
Pendulum drawing machine
Lens drive device for zoom optical system
Organic-inorganic hybrid polymer and method of making same
Flame retardant crosslinkable compositions and articles
Process of forming a composite diffusion barrier in copper/organic low-k damascene technology
Dual directional recording apparatus and recording system
Process for forming vias, and trenches for metal lines, in multiple dielectric layers of integrated circuit structure
Pressure-sensitive transducer using piezo ceramic material