US Patent 8422716 Dual locking boom pole

A telescoping boom pole for an electrical conductor is disclosed. The boom pole includes at least a top cylindrical conduit slidably assembled within a second cylindrical conduit. A top clamping means is included for selectively clamping the top conduit to the second conduit. The top clamping means includes an annular cylindrical collar having a threaded portion proximate a bottom edge on an inside surface thereof, and a collet restraining means proximate a top edge thereof. An annular, compressible collet is resiliently captured by the collet restraining means of the collar at a cooperative restraining means of an outside surface of the collet. The collet further includes an inclined lower portion on an outside surface thereof. The top clamping means further includes an annular sleeve fixed to a top end of the second conduit, and has an outside surface that includes a threaded portion that cooperates with the threaded portion of the collar. A top edge of the sleeve is formed into an upwardly-projecting wedge for pushing the collet inwardly at its inclined lower portion as the collar is threaded onto the sleeve. As such, the collet, the sleeve, and the collar force the top and second conduits to become mutually and immovably fixed together. Additional cylindrical conduits may be included and successively slidably assembled over the second conduit, additional clamping means being included between each conduit. As such, the conductor and electrical connectors thereof may be positioned through each conduit and each clamping means and be supported thereby.