Immersion heaters including sheet metal heat conduction link
US5459812A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Mar 16, 1993 |
| Grant date | Oct 17, 1995 |
| Priority date | — |
| Expiry date | Mar 16, 2013 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH05B3/82
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
An immersion heater includes a heating element having a return portion around which is wrapped a thermally conductive link. The link extends through a plastic head and seal member, by which the element is mounted in an opening in a wall of a heating chamber, and has a first portion bent down to cooperate with a bimetallic actuator of a thermally responsive control, which operates in the event that the element overheats. A second portion of the link is bent upwardly, its upper end cooperating with a thermally deformable member of the control which, in the event that the actuator fails to operate, will deform so as to disconnect the power supply to the element.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.