Invention Grant
- Patent Title: Ignition device having an electrode with a platinum firing tip and method of construction
- Patent Title (中): 点火装置具有具有铂烧结尖端的电极和结构方法
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Application No.: US11624272Application Date: 2007-01-18
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Publication No.: US07923909B2Publication Date: 2011-04-12
- Inventor: Paul Tinwell
- Applicant: Paul Tinwell
- Applicant Address: US MI Southfiled
- Assignee: Federal-Mogul World Wide, Inc.
- Current Assignee: Federal-Mogul World Wide, Inc.
- Current Assignee Address: US MI Southfiled
- Agency: Dickinson Wright, PLLC
- Agent Robert L. Stearns
- Main IPC: H01T13/20
- IPC: H01T13/20

Abstract:
An ignition device for an internal combustion engine and method of construction therefore includes a housing with an insulator secured therein. A center electrode is mounted within the insulator. A ground electrode extends from the housing with a portion of the ground electrode defining a spark gap across from the center electrode. At least a selected one of the center electrode or ground electrode has a platinum or platinum-based alloy firing tip. A resistance weld joint bonds the firing tip to the selected electrode and defines a lower surface of the firing tip that is embedded a first distance beneath an outer surface of the selected electrode. A continuous bead of overlapping laser weld pools is formed over an outer periphery of the firing tip. The overlapping weld pools extend a second distance beneath the outer surface of the selected electrode, with the second distance being greater than the first distance.
Public/Granted literature
- US20080174221A1 Ignition Device Having an Electrode With a Platinum Firing Tip and Method of Construction Public/Granted day:2008-07-24
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