Hollow knob
AssigneeArens Controls, Inc.
InventorJames U. Neyer
Life of this patent
Estimating the term…
Abstract
A hollow knob is provided for use on control shafts and the like. The knob comprises two hollow sections of plastic material and a metal insert threaded for receipt of a control rod or the like. The two hollow knob sections are provided with reinforcing ribs running at right angles to one another, and readily secured at crossover points by means of sonic welding. The metal insert is held securely in place in a well in one of the two plastic portions, being firmly trapped in place, and reinforcing the plastic sections.
Claims8
A hollow plastic knob comprising a lower portion having a downwardly opening recess therein, a metallic insert in said recess for receiving a member to be moved by said knob, said lower portion having retaining means adjacent said recess for trapping said insert in said recess, and a top portion secured to said bottom portion and having a part thereof bearing against said insert adjacent the upper end to hold said insert against said retaining means and for bracing said upper portion, said portions having relatively transverse ribs reinforcing the respective portions and having cross-overs at which said ribs are secured to one another.
A hollow plastic knob comprising a lower portion having a downwardly opening recess therein, a plurality of bracing ribs in said lower portion integral with the sidewalls of said lower portion and radially disposed, and a top portion secured to said bottom portion and having annular reinforcing ribs therein, the ribs of the respective parts having crossovers at which said ribs are secured to one another.
Dependencies are inferred from the claim text.