Spark plug boot keeper assembly
US6467447B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Jul 17, 2001 |
| Grant date | Oct 22, 2002 |
| Priority date | — |
| Expiry date | Jul 17, 2021 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF02P13/00
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A sparkplug boot keeper assembly interconnects between a heat shield and an ignition wire boot of a spark plug. A spring clip is pre-assembled internally to the heat shield which then engages a bottom portion of the spark plug after the spark plug is threaded to a head of an engine block. During assembly, as the heat shield moves axially inward over the spark plug, the pre-assembled spring clip rasps over a hexagonal portion of the spark plug and snap fits to the bottom portion. An outward facing surface of the boot is engaged to a compressed spring which in turn is engaged to an outward wall of the heat shield. Either a rotation, or an axially outward withdrawal force placed upon the heat shield, will radially expand the spring clip permitting disengagement of the heat shield and spring clip assembly from the stationary spark plug.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.