Pyroil Canada

Vinh L Nguyen

A washerless closure plug for closing althreaded opening in the block of automotive engines includes an externally threaded nipple surrounded by a sharp shoulder, which shoulder is provided with a pair of forwardly facing ribs. When the nipple is screwed into an engine block the ribs form a seal with the block wall to resist leakage from the block and to damp the transmission of vibrational forces from the block to the closure plug which tend to unscrew the closure plug from the block.

Closure plugs

A washerless block heater for automotive engines includes an externally threaded nipple surrounded by a sharp shoulder, which shoulder is provided with a pair of forwardly facing ribs. When the nipple is screwed into an engine block the ribs form a seal with the block wall to resist leakage from the block and to damp the transmission of vibrational forces from the block to the heater body which tend to unscrew the heater from the block.

Growing community of inventors

Toronto, Canada

Vinh L Nguyen