Patent ID: 9416698
Filing Date: 2016-08-16
CPC Classification: B23P,B65D,B67C,F01M,F16B,Y10T

Claim Text:
1. A method of fastening an oil fill extension tube into an oil pan, comprising: orienting a self-locking washer over a threaded opening in the oil pan, the self-locking washer comprising a plurality of teeth disposed on a top surface of the self-locking washer and a locking extension disposed orthogonally to the top surface of the self-locking washer; securely engaging, by the locking extension of the self-locking washer, a portion of the oil pan after the self-locking washer is oriented over the threaded opening; threading a first distal end of the oil fill extension tube into the threaded opening, the oil fill extension tube comprising a plurality of locking edges, the plurality of locking edges disposed towards the first distal end of the oil fill extension tube and defining boundaries of a plurality of slots; and ratcheting together the plurality of slots and the plurality of teeth to fasten the oil fill extension tube into the oil pan.