Redundant control circuit for hot melt adhesive hose assembly heater circuits and temperature sensors
US7626145B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jan 7, 2008 |
| Grant date | Dec 1, 2009 |
| Priority date | — |
| Expiry date | Jul 3, 2028 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG05D23/1928
- WIPO fieldControl
- WIPO sectorInstruments
Abstract
A redundant control circuit comprises a pair of heater circuits for heating a hot melt adhesive hose assembly to a predetermined temperature level, and a pair of temperature sensors which are used to sense the temperature of the hot melt adhesive hose assembly and to control energization of the heater circuits in order to maintain the desired temperature level. A first one of the heater circuits would initially be electrically connected to the hot melt adhesive hose assembly electrical circuitry, and in a similar manner, a first one of the temperature sensors would likewise be electrically connected to the hot melt adhesive hose assembly electrical circuitry. Subsequently, should a failure occur within the first one of the heater circuits, then an electrical switch mechanism would be activated so as to effectively remove the first, failed heater circuit from the hot melt adhesive hose assembly electrical circuitry, and substantially simultaneously, electrically connect the second one of the heater circuits to the hot melt adhesive hose assembly electrical circuitry. Similar switching procedures would also be implemented in connection with the pair of temperature sensors should a fa…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.