Patent ID: 9732895
Date: 2017-08-15
CPC Classifications: B23B,B23C,F16L

Claim:
1. A milling adaptor for use in milling a cross-cut slot in a pipe with a mill and a valve housing, the pipe having a longitudinal axis, the mill having a cutting bit extendable from a working end, the valve housing being positionable about the pipe, the milling adaptor comprising: a main adaptor plate removeably connectable to the valve housing, the main adaptor plate defining a milling slot and having a crank engagement at an end of the main adaptor plate, the milling slot being substantially perpendicular to the longitudinal axis when the main adaptor plate is connected to the valve housing; a sliding gate cutting adaptor slideably contactable with the main adaptor plate, the sliding gate cutting adaptor defining a cutting hole and having a cranking rod attachment at an end of the sliding gate cutting adaptor, the cutting hole being mateable with the working end of the mill; a cranking rod removeably engagable with the crank engagement and the cranking rod attachment; and a top retainer track removeably connectable to the main adaptor plate, the top retainer track and the main adaptor plate defining a slider passage between the top retainer track and the main adaptor plate when the main adaptor plate is connected to the top retainer track; wherein to mill the cross-cut slot when the main adaptor plate is connected to both the valve housing and the top retainer track with the sliding gate cutting adaptor disposed within the slider passage, and when the cranking rod is engaged with the crank engagement and the cranking rod receiver, rotation of the cranking rod in a first direction advances the cutting hole along the milling slot and rotation of the cranking rod in a second direction opposite the first direction retracts the cutting hole along the milling slot.