Water heating means
US4184064A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Nov 28, 1977 |
| Grant date | Jan 15, 1980 |
| Priority date | — |
| Expiry date | Nov 28, 1997 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF24H15/37
- WIPO fieldThermal processes and apparatus
- WIPO sectorMechanical engineering
Abstract
A water heater including an elongate tubular case, a block and a plug in spaced relationship in the case defining a chamber, an elongate heater tube with a helical portion within the chamber, and defining a central longitudinal opening, means connecting the ends of the tube with water supply and delivery lines, an elongate resistance heater unit extending longitudinally through said tube, an end extending from one end of the tube, a power supply line extending from a power source to the unit and means to control the supply of power from the line to the unit including a temperature sensing device positioned in the opening defined by the coiled tube and operable to stop and start the flow of power to the unit when the temperature of air in said opening is above and below a set temperature.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.