US 7,562,399 B2
Toilet flusher for water tanks with novel valves and dispensers
Natan E. Parsons, Brookline, Mass. (US); Fatih Guler, Winchester, Mass. (US); Kay Herbert, Winthrop, Mass. (US); Xiaoxiong Mo, Lexington, Mass. (US); and David Hadley, Franklin, Mass. (US)
Assigned to Arichell Technologies, W. Newton, Mass. (US)
Filed on Oct. 08, 2004, as Appl. No. 10/961,818.
Application 10/961818 is a continuation of application No. PCT/US03/11360, filed on Apr. 10, 2003.
Application PCT/US03/11360 is a continuation in part of application No. 10/174919, filed on Jun. 19, 2002, granted, now 6,752,371.
Application 10/174919 is a continuation in part of application No. PCT/US02/38758, filed on Dec. 04, 2002.
Application PCT/US02/38758 is a continuation in part of application No. PCT/US02/41576, filed on Dec. 26, 2002.
Claims priority of provisional application 60/371655, filed on Apr. 10, 2002.
Prior Publication US 2005/0133754 A1, Jun. 23, 2005
Int. Cl. E03D 1/00 (2006.01)
U.S. Cl. 4—323  [4/353; 4/366; 137/426; 251/30.01] 20 Claims
OG exemplary drawing
 
1. A flusher for use with a water storage tank, comprising:
an intake valve connected to an external water source and constructed to close water flow to a water storage tank at about a predefined water level in said water tank;
a diaphragm-operated flush valve constructed to control a flush valve member between a seated state and an unseated state allowing water discharge from said water tank into a toilet bowl;
a diaphragm, separating a flush-valve chamber and a pilot chamber, arranged to seal said flush-valve chamber and thereby maintain pressure forcing said flush valve member to said seated state preventing said water discharge from said water storage tank to said toilet bowl;
a pressure control mechanism constructed and arranged, upon actuation, to reduce pressure in said pilot chamber of said diaphragm-operated flush valve to cause deformation of said diaphragm and thereby reduce pressure in said flush-valve chamber causing said water discharge; and
a sensor module located at a reference location external to said water storage tank being at an input line coupling said external water source to said water storage tank.