Water closet flushing apparatus

• US 5,315,719 A
• Filed: 07/31/1992
• Issued: 05/31/1994
• Est. Priority Date: 09/01/1989
• Status: Expired due to Fees

• Current Assignee: Toto Limited
• Original Assignee: Toto Limited
• Inventors: Takeuchi, Hirofumi, Shibata, Shinji, Tsutsui, Osamu, Shinbara, Noboru, Makita, Atsuo
• Primary Examiner(s): Recla, Henry J.
• Assistant Examiner(s): Walczak, David J.
• Application Number:
  US07/923,215
• Time in Patent Office: 669 Days
• Field of Search: 4/300, 4/302, 4/313, 4/406, 4/328, 4/DIG. 3, 137/486, 137/487.5, 137/505.15, 137/505.13, 227/4
• US Class Current: 4/300
• CPC Class Codes: E03D 2201/30 Water injection in siphon for enhancing flushing
• CPC Class Codes: E03D 5/10 operated electrically E03D5/01, E03D5/12 take precedence, e.g. by a photo-cell; also combined with devices for opening or closing shutters in the bowl outlet and/or with devices for raising/or lowering seat and cover and/or for swiveling the bowl
• CPC Class Codes: Y10S 4/03 Electric flushing

Abstract

A water closet flushing apparatus provided with a pressure detector mounted along a water supply pipe, an opening and closing apparatus to open and close a water supply passage provided along the water supply pipe and a control apparatus that uses the pressure detected by the pressure detector to control the opening and closing operation of the opening and closing apparatus so that a predetermined amount of water is supplied to the water closet.

Claims

1. A flushing water supply method for a water closet, comprising the steps of:

detecting a pressure of flushing water for a water closet along a water supply passage, controlling the opening of said water supply passage for adjusting the instantaneous rate of water flow through said passage on the basis of the detected pressure so that a predetermined water supply amount is supplied to a water closet, and wherein the controlling step includes calculating an instantaneous flow amount of flushing water in the water supply passage on the basis of the detected pressure, comparing said calculated instantaneous flow amount with a predetermined instantaneous flow amount and determining their difference, calculating a necessary degree of opening of the water supply passage on the basis of the difference in said calculated and predetermined instantaneous flow amounts for causing water flow at said pre determined instantaneous flow amount, and opening the water supply passage for a predetermined opening time while maintaining the calculated degree of opening and then closing the water supply passage.

2. A flushing water supply method for a water closet, comprising the steps of:

detecting a pressure of flushing water for a water closet along a water supply passage, controlling the opening of said water supply passage for adjusting the instantaneous rate of water flow through said passage on the basis of the detected pressure so that a predetermined water supply amount is supplied to a water closet, and wherein the controlling step includes opening the water supply passage, calculating an instantaneous flow amount of flushing water in the water supply passage on the basis of the detected pressure, integrating said instantaneous flow amount to measure the total amount of water flowing through said passage, and closing the water supply passage when the total flow amount reaches the predetermined water supply amount.

3. A flushing water supply method for a water closet, comprising the steps of:

detecting a pressure of flushing water for a water closet along a water supply passage, controlling the opening of said water supply passage for adjusting the instantaneous rate of water flow through said passage on the basis of the detected pressure so that a predetermined water supply amount is supplied to a water closet within a preselected time period, and wherein the controlling step includes comparing the detected pressure and a predetermined water supply pressure, and increasing said time period so that an amount of flushing water greater than the predetermined water supply amount is supplied to the water closet when the detected pressure is less than the predetermined water supply pressure.

4. A flushing water supply method for a water closet, comprising the steps of:

detecting a pressure of flushing water for a water closet along a water supply passage, controlling the opening of said water supply passage for adjusting the instantaneous rate of water flow through said passage on the basis of the detected pressure so that a predetermined water supply amount is supplied to a water closet within a preselected time period, and wherein the controlling step includes calculating an instantaneous flow amount of flushing water in the water supply passage on the basis of the detected pressure, comparing the calculated instantaneous flow amount and a predetermined instantaneous flow amount, and increasing said time period so that an amount of flushing water greater than the predetermined water supply amount is supplied to the water closet when said calculated instantaneous flow amount is less than the predetermined instantaneous flow amount.

5. A flushing water supply method for a water closet, comprising the steps of:

detecting a pressure of flushing water for a water closet along a water supply passage, controlling the opening of said water supply passage for adjusting the instantaneous rate of water flow through said passage on the basis of the detected pressure so that a predetermined water supply amount is supplied to a water closet within a preselected time period, and wherein the controlling step includes comparing a pressure detected by said pressure detection means when the water supply passage is in the open status and when in a closed status, calculating their difference, and controlling said opening of said water supply passage on the basis of the pressure difference so that the predetermined water supply amount is supplied to the water closet.

6. The flushing water supply method of claim 5, wherein the controlling step includes calculating a necessary instantaneous flow amount of flushing water on the basis of the calculated pressure difference.