Boiling water dispenser having improved water temperature control system
US5019690A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Sep 15, 1989 |
| Grant date | May 28, 1991 |
| Priority date | — |
| Expiry date | Sep 15, 2009 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG05D23/24
- WIPO fieldControl
- WIPO sectorInstruments
Abstract
A boiling water dispenser includes a hot water reservoir, a user-actuated faucet for drawing boiling water from a discharge zone at the top of the reservoir, and a solenoid-actuated valve for admitting unheated water to an inlet zone at the bottom of the reservoir. An electric resistance heating element within the reservoir is supplied with AC current through a series- connected bilateral switch device which is periodically switched on and off in response to the sensing of steam in a reservoir venting conduit to maintain the dispensing temperature at the boiling point. An indicator lamp conditioned by a sensor in the reservoir confirms to the user that the dispensing temperature is at the boiling point.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.