Patent Number: 6,168,212

Title: Twist-lock connector for adjustably interlocking telescopic tubular members

Abstract: A twist-lock connector for adjustably connecting interlocking telescopic tubular members includes a camming surface on the interior surface of a rotatable member which cooperates with the camming member of a seating member attached to a first tubular member. The twist-lock connector is employed by inserting the male end of a second tubular member inside the female end of a first tubular member to which the seating member is attached, and rotating the rotatable member in a first direction until the camming action causes the engaging surface of the seating member to lock by frictionally engaging the outer surface of the second tubular member. Disconnection of the tubular members is effected by reversing the order of the steps for connection. The twist-lock connector also includes an overtightening protection feature. When the rotatable member is rotated in the first direction relative to the seating member by approximately, the lock is released, but without breakage of the twist-lock connector. Advantages associated with the twist-lock connector include not only the overtightening protection feature, but both the mechanical integrity of the connection and the ease of operation of the connector, including the ability to easily adjust the axial length of the telescoping tubular members.

Inventors: Finley; Richard O. (Upland, CA)

Assignee: The United Electric Company of Ohio

International Classification: F16B 7/00 (20060101); F16B 7/14 (20060101); F16L 019/00 ()

Expiration Date: 01/02/2018