Patent ID: 8896924

Claim:
A tubular daylighting system for directing light from a skylight lens to a space within a building, the tubular daylighting system comprising: a plurality of tubular shaft sections including a top shaft section and a bottom shaft section, each of said plurality of shaft sections having a longitudinal center axis, said top shaft section for connecting to the skylight lens, said top shaft section having a different diameter than said bottom shaft section so that one of said top and bottom shaft sections can be inserted into the other in a nested configuration, said bottom shaft section having a shaft wall, said top shaft section having a plurality of sets of slots, each set of said plurality of sets of slots having one or more slots, said bottom shaft section having a plurality of arrays of tabs, each array of said plurality of arrays having one or more tabs, said plurality of arrays of tabs spaced equally around the circumference of said bottom shaft section, each said tab formed in and connected to the shaft wall of said bottom shaft section at a bend line parallel with said center axis such that said tabs are selectively bendable outwardly or inwardly relative to said shaft wall, in said nested configuration at least one of said one or more slots of each set of said plurality of sets of slots of said top shaft section registering with one of said one or more tabs of each of the arrays of said plurality of arrays of tabs of said bottom shaft section, such that bending the one or more tabs of one of said plurality of arrays of tabs through the one or more slots of one of said plurality of sets of slots securely interconnects said top and bottom shaft sections.