Spark plug

专利名称：Spark plug

发明人：John Anthony Burrows申请号：US12401120申请日：20021105公开号：USRE041672E1公开日：20100914

专利附图：

摘要：A spark plug () comprises an electrically-insulating sleeve (), a first electrode (),an electrically-conducting shell () surrounding said sleeve, and a second electrode ()mounted on said shell. The electrodes (and ) define a spark gap (G) of the plug. The shell() has an end portion (c) terminating at an end surface (b) of the shell. The sleeve ()

extends past said end portion (c) with a clearance therebetween and extends beyond saidend surface (b). The sleeve () has at least one projection () which projects from the sleeve() and reduces said clearance in the region of the end surface (b), thereby forming asecondary spark gap (G).

申请人：John Anthony Burrows

地址：Northwich GB

国籍：GB

代理机构：Dickinson Wright, PLLC

代理人：Robert L. Stearns

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