Resources Contact Us Home
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
Method and system for reading from or writing to multiple surfaces of a disk
Obstacle detection device
System for patent interactive neural stimulation with robotic facilitation of limb movement
LED light emitting device
Virtual machine memory page sharing system
Decorative container for wine bladder
Systems and methods for identifying classes of substances
  Randomly Featured Patents
Trash receptacle
Low stress stem connection structure for a non-rising stem type gate valve
Method for driving memory cells of a dynamic semiconductor memory and circuit configuration
Air-conditioning apparatus for motor vehicles
Recycling cabinet unit
Four pole latching connector system
Chain saw adjuster mechanism with locking teeth
System and method for dynamic page classification for memory dumping
Method of doping crystalline silicon film
Memory system with reduced block decoding