The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jun. 10, 2008
Filed:
Dec. 23, 2005
Natan E. Parsons, Brookline, MA (US);
Fatih Guler, Winchester, MA (US);
Kay Herbert, Winthrop, MA (US);
Natan E. Parsons, Brookline, MA (US);
Fatih Guler, Winchester, MA (US);
Kay Herbert, Winthrop, MA (US);
Arichell Technologies Inc., Newton, MA (US);
Abstract
A leak detector for detecting flow of at least partially conductive fluid includes two electrodes and an electrical circuit. A valve device including an actuator is constructed to receive open and close signals for opening and closing the valve device between an input port and an outer port. The two electrodes are located on opposite sides of the valve device and are electrically isolated from each other in absence of the liquid flowing between the input port and the output port. The electrical circuit measures an electrical property between the electrodes. The leak detector is suitable for a multizone irrigation system that includes a central control unit having a central control system interfaced with a central valve and a central communication unit. The central valve regulates water flow for irrigation from a water source and can lower water pressure in the pipes at its output. The central communication unit is constructed to transmit or receive pressure based communication signals providing irrigation information. Each zone includes a sprinkler control unit having a sprinkler connected to a water pipe for irrigation.