Electrical connectors – With coupling movement-actuating means or retaining means in... – Retaining means
A safety plug includes a pair of prongs each prong having a hook portion formed on an end portion of the prong to be locked or engaged with a fastening loop portion formed in a receptacle when plugged in the receptacle to prevent from unexpected withdrawal of the safety plug from the receptacle for enhancing electrical safety and for maintaining a normal power supply to an electric equipment.
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patent: 2004/0102103 (2004-05-01), Kling et al.
patent: 2004/0235334 (2004-11-01), Kim
Patel Tulsidas C.
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