Mang Lim Ngo

US Patent:

20020064421, May 30, 2002

Filed:

Nov 30, 2000

Appl. No.:

09/727137

Inventors:

Kevin Beaulieu - Charlotte NC, US
Mang Ngo - Charlotte NC, US

International Classification:

B26B019/00
B26B021/12
F16B001/00

US Classification:

403/337000

Abstract:

A coupling structure for a split boom power tool is provided. The structure permits any of a variety of lower tubular boom members with their working tools to be quickly and easily coupled to or uncoupled from an upper tubular boom member having a power source. The structure includes compatibly sized end portions on the upper and lower boom members that allow them to be quickly and easily telescopically joined and also provide a strengthened joint. A clamping member is provided with a locating tab that is receivable in a locating hole in the tube of the upper boom member to allow the clamp to be quickly and positively positioned at the joint. A plurality of tool orienting openings are provided in the end portion of the upper boom member and clamp to receive a spring loaded locking pin carried in the lower boom member to position the tool at a desired angular working orientation. The locating tab further serves to align the tool orienting openings in the clamp and upper boom member as the clamp is positioned on the upper boom member.