Patent ID: 6966679
Filing Date: 2005-11-22
Classification: F16C,F16M,F21V,F21W

Abstract:
1. An adjustable light fixture mounting assembly comprising: a knuckle joint having a rotational axis and a self-locking multiple taper structure extending circumferentially around the axis; a lower member; an upper member rotatably coupled to the lower member with the knuckle joint; the self-locking multiple taper structure comprising first and second circumferentially extending ridge surfaces encircling the axis and first and second circumferentially extending groove surfaces encircling the axis; the first and second ridge surfaces being radially spaced apart from one another relative to the axis; and the knuckle joint comprising a locking element, acting substantially coaxial with the axis, capable of being manipulated to force the ridge surfaces against the groove surfaces to lock the self-locking multiple taper structure.