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High strength flexible ferrule

a flexible, tube fitting technology, applied in the direction of pipe joints, non-disconnectible pipe joints, mechanical devices, etc., can solve the problems of difficult assembly, and achieve the effect of less prone to damage, easy sliding, and consistent grip and bite of tubing

Inactive Publication Date: 2016-05-26
PARKER HANNIFIN CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

The patent text describes ferrules and ferrule assemblies that have improved features compared to conventional ones. These features include stronger materials for better grip, uniform bite edges, easier assembly, and better dampening of vibration. These improvements help make the ferrules and ferrule assemblies more effective and reliable.

Problems solved by technology

As a result, the forces and torques required to assemble these fittings are increasingly making proper assembly more difficult.

Method used

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Examples

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Embodiment Construction

[0061]Referring to FIG. 1, a conventional tube fitting assembly 10 is illustrated. The assembly includes a tube 12 coupled to a fitting body 14 by a nut 16, a front ferrule 20, and a back ferrule 21. The fitting body 14 and the nut 16 are threadably engageable with each other, and force the front and back ferrules into mechanical engagement with the tube 12. In particular, as the nut is tightened on the body, the nut mechanically engages an adjacent end of the back ferrule, pushing the back ferrule against the front ferrule, which is pushed into the body, and down into the tube.

[0062]Throughout this application, both one and two ferrule assemblies are described. It is contemplated that, unless otherwise stated, aspects of the present invention may be applicable to either one or two ferrule assemblies. In two ferrule assemblies, either of the front or back ferrule or both the front and back ferrule may include one or more features described herein. Further, exemplary ferrules may be ...

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Abstract

A ferrule (120) for coupling a tube (112) to a fitting body (114) includes an outer cam surface (124) for bearing against the fitting body or another ferrule; an inner surface (126) defining a central bore (128) extending through a length of a body of the ferrule along a longitudinal direction from a bite edge (138) to a nut end (129); a recess surface (134) defining a counter bore extending from a bite end (137) to the bite edge (138), the bite edge (138) thereby recessed from the bite end (137).

Description

FIELD OF INVENTION[0001]The present invention relates generally to tube fittings, and more particularly to high strength flexible ferrule tube fittings.BACKGROUND[0002]As tubing materials become stronger and harder for higher pressure applications, the ferrule materials have also become much stronger in order to grip, bite and hold the stronger tubing material. As a result, the forces and torques required to assemble these fittings are increasingly making proper assembly more difficult.SUMMARY OF INVENTION[0003]Therefore, exemplary ferrules and ferrule assemblies include features providing advantages compared to conventional ones. For example, an exemplary ferrule may be manufactured from stronger materials needed to grip, bite and otherwise hold these stronger tubing materials. A ferrule bite edge may be more uniform and less prone to damage providing a more consistent grip and bite of the tubing. A ferrule leading edge may more easily slide and bow during assembly to reduce load / t...

Claims

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Application Information

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Patent Type & Authority Applications(United States)
IPC IPC(8): F16L19/10
CPCF16L19/10F16L19/103F16L19/106
Inventor GIBSON, JAMES D.
Owner PARKER HANNIFIN CORP
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