US 6,981,524 B2
Twist off drive for a tube plug
Glenn F. Jorgensen, Ridgewood, N.J. (US)
Assigned to JNT Technical Services, Inc., Little Ferry, N.J. (US)
Filed on Nov. 26, 2003, as Appl. No. 10/723,666.
Prior Publication US 2005/0109413 A1, May 26, 2005
Int. Cl. F16L 55/00 (2006.01)
U.S. Cl. 138—89 21 Claims
OG exemplary drawing
 
1. A tube plug kit comprising:
a tube plug having a housing member and a locking member, the housing member having a longitudinal bore comprising a smooth portion communicating with a threaded portion, the locking member mounted on the housing member;
an insert member having a first threaded end portion received within the threaded portion of the bore, an enlarged portion positioned to be drawn within the smooth portion of the longitudinal bore in response to rotation of the insert member in the longitudinal bore and a drive portion configured to receive a torque applying tool in a rotationally driving manner; and
a torque limiting region located between said enlarged portion and said drive portion in said insert member to limit an amount of torque said drive portion can transmit to said first threaded end portion.