Tube nut torque limiting method and apparatus

Details Tube nut torque limiting method and apparatus Tube nut torque limiting method and apparatus

1995-10-03

1997-08-19

Nicholson, Eric K.

Pipe joints or couplings

Frangible element

Score line or groove

2853345, 285 3, 411 3, F16L 3500

Patent

active

056580177

ABSTRACT:
A tube nut torque limiting method and apparatus provides direct mechanical control of the maximum torque that can be generated when securing a tubular member within an internally threaded component. The torque limiting tube nut includes an externally threaded portion (14), a service head portion (16) and an installation head portion (22). A shoulder (24) is disposed between the service head portion (16) and the installation head portion (22) to mechanically control the maximum torque applied to the externally threaded portion (14). Upon separation of the installation head portion (22) at the shoulder (24), the installation head portion (22) includes a removal passage (40) for allowing the installation head portion (22) to simply be removed from the tubular member (28).

REFERENCES:
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patent: 4519449 (1985-05-01), Hoskins et al.
patent: 4575274 (1986-03-01), Hayward
patent: 4789759 (1988-12-01), Jones
patent: 5052719 (1991-10-01), Boehm

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