Patent ID: 7357225
Filing Date: 2008-04-15
Classification: B03C,F01M

Abstract:
1. A drain plug assembly comprising: an outer fitting body comprised of a durable nonmagnetic and noncorrosive metal and having a portion with external threads and a head portion, and further including an exterior seal on the outer fitting body, and an axial bore through the outer fitting body, the bore including a threaded portion, and an inner bolt body, comprised of a durable nonmagnetic and noncorrosive metal and having a cylindrical portion, a portion with external threads fitted to said threaded portion of the axial bore of the outer fitting body and a tool engagement end, said inner bolt body having a magnet at an end opposite the tool engagement end to draw small magnetic fragments from oil or fluid, the inner bolt body further having an elastomeric sealing ring positioned to seal against the outer fitting body, whereby the drain plug assembly can replace a drain plug in an oil or other liquid sump, with the outer fitting body installed semi-permanently in a threaded oil sump opening and the inner bolt body being removable from and reinsertable into the outer fitting body for access to the sump, while also collecting small magnetic fragments from the sump on the inner bolt body so as to remove them from the sump.