Flat resistors for automotive blower motor speed control or other service
US6018288A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | May 14, 1998 |
| Grant date | Jan 25, 2000 |
| Priority date | — |
| Expiry date | May 14, 2018 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01C3/10
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
The flat resistor comprises a stack of flat components including a first metal plate having assembly tabs bent, a first outer electrical insulator having alignment slots for receiving the tabs, a first sheet metal resistance element having slots for receiving the tabs with a clearance fit, a first inner electrical insulator having alignment slots for receiving the tabs, a metal midplate having oversize slots for receiving the tabs with a clearance fit, a second thin inner insulator having alignment slots for receiving the tabs, a second sheet metal resistance element having clearance slots for receiving the tabs, a second thin outer insulator having alignment slots for receiving the tabs, and a second metal outer plate having alignment slots for receiving the tabs, which are bent into engagement with the second plate for compressing the stack. The resistance elements have alignment tabs extending through alignment slots in the corresponding outer insulators and securely bent behind the insulators. The outer plates have clearance voids formed by outward embossments opposite the bent tabs. A thermal fuse is pressed by a wire spring against a V-shaped seat comprising lugs bent from th…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.