Connection device in an ignition system
US4621881A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Apr 2, 1985 |
| Grant date | Nov 11, 1986 |
| Priority date | — |
| Expiry date | Apr 2, 2005 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01T13/04
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A connection device in an ignition system for transferring current to the spark plugs of an internal combustion engine includes a comparatively rigid outer sleeve intended to surround an upper portion of a spark plug, a contact for conductive communication with a central electrode of the spark plug, an elastic inner sleeve surrounded by the outer sleeve for tightly sealing against the upper portion of the spark plug when the connection device is fitted to the spark plug, a space being formed between the outer sleeve and the inner sleeve for allowing radial expansion of the inner sleeve, the outer sleeve and the inner sleeve having lower portions which include coacting portions for transferring force between the outer and inner sleeves, whereby for an upwardly directed force on the connection device fitted to the spark plug, force is transferred from the outer sleeve to the inner sleeve, and causes the inner sleeve to relinquish the spark plug.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.