Threaded coupling assemblies for interconnecting fluid-carrying conduits

US12173817B2 · kind B2 · utility

Assignee

• Parker-Hannifin Corporation · US

Inventors

• Dieter Ehrke · Bielefeld, DE
• Oliver Neiske · Verl, DE
• Thomas G. Johnson · Blue Hill, US
• Jonathan M. Golightly · Fort Worth, US

Key dates

• Filing date: May 28, 2020
• Grant date: Dec 24, 2024
• Expiry date: Sep 14, 2041

Classification

• Technology area (CPC F): Mechanical Engineering; Lighting; Heating
• CPC primary: F16L2201/10
• WIPO field: Mechanical elements
• WIPO sector: Mechanical engineering

Abstract

A threaded coupling assembly include a union (12), a tube end (14), and a coupling nut (16). A pair of telescoping indicator rings (30, 32), a radially outer ring and a radially inner ring, are respectively connected to the union and the nut. The inner ring has a first visual characteristic contrasting with a second visual characteristic of the inner ring. The outer ring has a third visual characteristic contrasting with the second visual characteristic of the inner ring. The first visual characteristic is aligned with and viewable through the window (60) of the outer ring when the threaded coupling assembly is in the fully assembled state, and the first visual characteristic is out of alignment with the window when the threaded coupling assembly is not in the fully assembled state. The assembly may utilize tapered threads and have one or more features for self-alignment and/or sealability.