Fastener for strut channel

A fastener for attaching to a structure having opposing edges that flank a cavity across a gap, said fastener comprising:

• a knob assembly having a grip and an inner annulus annular shaft disposed thereon along an axis of symmetry, said grip having a central through-hole coaxial with said inner annulus annular shaft, said inner annulus annular shaft having an arc tab that radially protrudes therefrom;
• a base assembly for engaging said knob assembly, said base assembly including a boss clamp and an outer key-annulus disposed thereon, the boss clamp having first and second dimensions perpendicular to said axis, said first dimension being shorter than the gap, said base assembly being flanked by opposing ledges along said second dimension, each ledge arranged to engage a respective edge of the structure, said outer key-annulus having an annular notch opposite said clamp, said inner annulus annular shaft being coaxially insertable into said outer key-annulus;
• a latch member for engaging said base assembly, said latch member including a stud and a flange, said stud being insertable at a proximal end into said inner annulus annular shaft and said through-hole, said flange being disposed at a distal end of said stud and having a third dimension shorter than the gap;
• and
• a cap member that engages said grip, said cap member having a circumferential rim and locking mechanism for securing said base assembly,
• said flange and said block being insertable into the cavity along said respective third and first dimensions through the gap, and
• responsive to clockwise turning, said grip rotates said tab within said angular notch until inhibited by said outer key-annulus, whereby said proximal end of said stud retracts into said through-hole, thereby engaging the fastener to the structure, wherein said locking mechanism includes a clip that engages a portion of said circumferential rim.

A fastener for attaching to a structure having opposing edges that flank a longitudinal cavity along a gap, said fastener comprising:

• a knob assembly having a circumferential rim about an axis of symmetry that bounds first and second surfaces substantially perpendicular to said axis, and an annular shaft that extends from said second surface along said axis, said first surface having a central cavity that includes a flat wall parallel to said axis, said central cavity being continuous with and coaxial to said annular shaft and angularly truncated by said wall, said second surface having an arc tab that protrudes radially outward from said annular shaft;
• a base assembly for engaging said knob assembly, said base assembly having a block and an outer key-annulus, said block having a boss and a platform, said boss having first and second pairs of sides substantially parallel to said axis and each pair of sides being perpendicular to each other, said first pair having a first linear dimension shorter than the gap, said second side having a linear notch, said platform having a third surface that axially bounds said first and second pairs and from which said outer key-annulus axially extends, each side of said second pair having a ledge opposite said third surface, said outer key-annulus having an angular notch opposite said third surface, said annular shaft being insertable into said outer key-annulus;
• and
• a latch member for engaging said base assembly, said latch member having a stud and a flange, said stud being substantially cylindrical about said axis between proximal and distal ends, said flange being disposed at said distal end of said stud and having a third linear dimension shorter than the gap, said stud having a truncation surface at said proximal end,
• said stud being insertable at said proximal end through said linear notch into said annular shaft;
• said flange and said block being insertable into the longitudinal cavity along said respective third and first linear dimensions through the gap between the edges, and
• responsive to clockwise turning, said rim rotates said tab within said angular notch until said outer key-annulus inhibits said tab and said truncation surface engages said wall, whereby said proximal end of said stud retracts into said central cavity and said flange aligns for insertion into said linear notch, thereby engaging the fastener to the structure.