Patent GB-1017110-A (GB)
Title: Toilet bowl assembly incorporating a delayed closing flushing valve
IPC: E03D5/012
Filed: 1962-11-30
Abstract: 1,017,110. Water-closets. MISSION-WEST MANUFACTURING CO. Nov. 30, 1962 [Dec. 19, 1961], No. 45424/62. Heading E1C. [Also in Division F2] General Arrangement A toilet bowl assembly 10, Fig. 1, has a water inlet 15, a normally-open cut-off valve 16, Fig. 2, and a normally-closed spray-valve 22 supplying a spray passage 23, both valves being operated by an externally threaded member 28 so that only one valve is open at any one time. Further downstream is a normally-closed delayed-action flush-valve 30 operable by a spring-loaded plunger 32, the water passing the flush valve 30 flows to a riser pipe 35, Fig. 1, having a vacuum breaker 36 to which is connected a manifold 38 with a number of ports 40 opening into the bowl. The outlet from the latter is provided with a hinged valve 42, Fig. 2, which is spring-loaded to the closed position shown, but may be opened by operating a foot pedal 45. The bowl embodies an overflow passage 46, Fig. 1, which leads directly to the drain passage 50 downstream of the valve 42, which passage 50 is reversely curved to trap a quantity of water therein, the water being supplied through a port 52 in the manifold 38. The valve 42 is made of rubber with a spherically-curved upper-surface and is mounted on an arm 62 carried by a rocker shaft 63. The valves 16, 22, 30 are in a structure made up of three sections 76, 78, 80 and carried at the rear of the bowl pedestal. Operation The bowl is flushed by depressing the pedal 45 whereupon the valve 42 opens to both release the water trapped in the bowl and to act through the plunger 32 to open the flushing valve 30; upon release of the pedal the valve 42 is spring- closed but the valve 30 remains open to permit a new body of water to build up in the bowl. The valve 16 is closed and the valve 22 opened prior to transit of the bowl. The flush valve 30 has a flexible diaphragmobturator 94, which also forms the seat 24 for valve 22, and a gasket between body sections 78, 80. The obturator 94 incorporates a central opening 96 normally closed by a ball valve 98 loaded by a spring 100, the valve 98 being confined by a cage 102 which is manually adjustable to provide a variable delay in valve closing. The chambers 115, 116 on opposite sides of the diaphragm obturator 94 are in communication by a restricted passage so that when the plunger 32 is depressed the valve 98 is unseated, the chamber 115 is open to pipe 35 via the opening 96, and the pressure in chamber 115 drops so that the diaphragm is forced away from its seat 92 by the pressure in chamber 116, whereupon the latter also opens to pipe 35. When the plunger 32 retracts the valve 98 closes the opening 96 and the pressure in chamber 115 rises slowly due to the restricted passage and after a given delay the required pressure differential across the diaphragm is again realised and the diaphragm seats and prevents further supply of water to the pipe 35. The vacuum breaker 36, Fig. 5, has a rubberlike cap which serves as an annular vent and a stop for the bowl cover. The pipe 35 rises to the top of the breaker 36 and is normally closed by a gravity-loaded valve 142. Should a vacuum develop in the inlet 15 the pressure differential across the valve 142 causes it to seat firmly on the pipe 35; any leakage past the valve 142 causes atmospheric air to enter through vent opening 158. In a modification, the combined cut-off and spray valves are dispensed with and a sealing diaphragm is employed to prevent any contaminated water flowing from the drain passage 50 to the inlet side of the apparatus.