# US 2014/0190990 A1 · Water dispenser > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2014/0190990 A1 - Document ID: US20140190990A1 - Status: Published application - Kind: A1 - Application number: 14/152,484 - Filed: 2014-01-10 - Published: 2014-07-10 - Earliest claimed: 2013-01-10 - Assignees: Zuri Naaman Victor Ltd. - Applicants: Zuri Naaman Victor Ltd. - Inventors: Raoven Raoven; Gidon Ben-Moshe - Web page: https://patentgrep.com/patent/US20140190990A1 ## CPC - B67D 3/0003: {provided with automatic fluid control means} - B67D 3/0009: {provided with cooling arrangements (cooling perse F25)} - B67D 3/0022: {provided with heating arrangements} - B67D 3/0045: {by filling a predetermined volume before dispensing} - B67D: DISPENSING, DELIVERING OR TRANSFERRING LIQUIDS, NOT OTHERWISE PROVIDED FOR (cleaning pipes or tubes or systems of pipes or tubes B08B9/02; emptying or filling of bottles, jars, cans, casks, barrels, or similar containers, not otherwise provided for B67C; water supply E03; pipe systems F17D; domestic hot-water supply systems F24D; measuring volume, volume flow, mass flow or liquid level, metering by volume G01F; coin-freed or like apparatus G07F) ## Abstract A Sabbath compliant water dispenser, which comprises a hot water chamber, a heating element that is positioned in the hot water chamber for heating a body of water which is retained within the hot water chamber and a tap, through which hot water is dispensable. The water dispenser is controlled by a controller which is operable in a Sabbath mode to command the heating element to maintain the body of water at an essentially constant temperature which is near to scalding temperature and to command introduction of unheated water into the hot water chamber, when a low water level condition is detected. This way, overheating of the heating element is prevented, while also preventing the introduced, water from being dispensed. ## Claims ### Claim 1 A Sabbath compliant water dispenser, comprising: a) a hot water chamber; b) at least one heating element positioned in said hot water chamber for heating a body of water retained within said hot water chamber; c) a tap through which hot water is dispensable; and d) a controller which is operable in a Sabbath mode to command said at least one heating element to maintain said body of water at an essentially constant temperature which is at least a near to scalding temperature and to command introduction of unheated water into said hot water chamber, when a low water level condition is detected, to prevent overheating of said at least one heating element, while preventing said introduced water from being dispensed. ### Claim 2 (depends on 1) The Sabbath compliant water dispenser according to claim 1, from which hot and cold water are instantly dispensable on demand during both a working day mode and a Sabbath mode when the low water level condition is not detected ### Claim 3 (depends on 1) The Sabbath compliant water dispenser according to claim 1, further comprising: a) a control valve operatively connected to a conduit extending to the hot water chamber and through which the unheated water is introducible; and b) a plurality of sensors positioned in said hot water chamber, each of said sensors operative to detect a different water level in the hot water chamber, wherein the controller is in communication with said control valve and with said plurality of sensors such that the controller is operable to command the control valve to be normally closed, to open in a working day mode when a water level in the hot water chamber falls below a predetermined high level as detected by an uppermost sensor, and to open in the Sabbath mode only when the water level in the hot water chamber falls below a predetermined low level as detected by a lowermost sensor. ### Claim 4 (depends on 3) The Sabbath compliant water dispenser according to claim 3, wherein the controller is operable to command opening of the control valve during the working day mode for a first predetermined opening time when the water level in the hot water chamber falls below the predetermined high level and during the Sabbath mode, when the water level in the hot water chamber falls below the predetermined low level, for a second predetermined opening time less than said first time and of a sufficiently short duration to prevent the water level in the hot water chamber from rising above a tap level located above the predetermined low level. ### Claim 5 (depends on 3) The Sabbath compliant water dispenser according to claim 3, wherein the plurality of sensors are conductive water level sensors by which a desired volume of water to be retained in a corresponding chamber is selectable. ### Claim 6 (depends on 5) The Sabbath compliant water dispenser according to claim 5, wherein during the working day mode the controller is operable to command opening of the control valve when the water level in the hot water chamber falls below the predetermined high level and to command closing of the control valve when the water level in the hot water chamber rises above a predetermined intermediate level as detected by an additional sensor positioned between the uppermost sensor and the lowermost sensor. ### Claim 7 (depends on 2) The Sabbath compliant water dispenser according to claim 2, which comprises separate hot water and cold water chambers, said cold water chamber comprising at least one chilling element and a selective water discharging element from which cold water is dispensable. ### Claim 8 (depends on 7) The Sabbath compliant water dispenser according to claim 7, wherein the at least one chilling element operates according to a predetermined duty cycle that is independent, of the amount of water remaining within the cold water chamber. ### Claim 9 (depends on 8) The Sabbath compliant water dispenser according to claim 8, wherein the at least one chilling element operates according to the predetermined duty cycle during both the working day mode and the Sabbath mode. ### Claim 10 (depends on 8) The Sabbath compliant water dispenser according to claim 8, wherein the at least one chilling element operates according to the predetermined duty cycle during the Sabbath mode and is commanded by the controller to operate in the working day mode only when a drop in an instantaneous water level within the cold water chamber is detected. ### Claim 11 (depends on 3) The Sabbath compliant water dispenser according to claim 3, further comprising conduit means for preventing impermissible dispensing of the Sabbath-introduced water.