US Patent 11364407 Connector assembly

A connector assembly includes a shaft and a first annular knob fixed to the shaft and a second annular knob releasably engaged with the shaft. Each of the first and second annular knobs includes a front face, a face, and a central passage that receives the shaft. The central passage has first, second, and third sections. The width of each first section is greater than the width of the third section, and the width of the second section is greater than the width of the first section. The second section defines an annular slot between the first and third sections.