SHRUNK FIT TUBE COUPLING

• US 3,567,259 A
• Filed: 10/03/1968
• Issued: 03/02/1971
• Est. Priority Date: 09/29/1967
• Status: Expired due to Term

• Current Assignee: Brian Benson, Cleare Ian Martin
• Original Assignee: Brian Benson, Cleare Ian Martin
• Inventors: Benson, Brian, CLEARE IAN MARTIN
• Application Number:
  US04/764,776
• Time in Patent Office: 880 Days
• US Class Current: 285/381.4
• CPC Class Codes: F16L 47/22 using shrink-down material
• CPC Class Codes: Y10S 428/913 Material designed to be responsive to temperature, light, moisture
• CPC Class Codes: Y10T 29/49865 by temperature differential [e.g., shrink fit]
• CPC Class Codes: Y10T 403/342 Polyhedral

Abstract

A UNION BETWEEN A FITTING AND A CONVOLUTED PLASTICS HOSE COMPRISING AN IRRADIATED SHRINK-DOWN MATERIAL FOR THE FITTING AND A HOLLOW RIGID CYLINDRICAL FERRULE OF NYLON OR ALUMINIUM ALLOY WITHIN A SMOOTH NON-CONVOLUTED END OF THE HOSE WHEREBY THE FERRULE RESTRAINS DEFORMATION OF THE HOSE END WHEN THE FITTING IS SHRUNKEN OVER IT. THE CONVOLUTIONS ARE REMOVED FROM THE HOSE END AND THE END IS FORMED WITH AN EXTERNAL DIAMETER EQUAL TO THE EXTERNAL DIAMETER OF THE CONVOLUTIONS BY STRETCHING THE END OF THE HOSE OVER A HEATED MANDREL AND APPLYING A TOOL TO THE HOSE END EXTERIOR SURFACE. THE FITTING IN ITS PRE-FORMED EXPANDED STATE AND THE HOSE MAY BE SO POSITIONED WITH RESPECT TO ONE ANOTHER THAT AFTER SHRINKING AN END EDGE OF THE FITTING LIES IN THE SPACE BETWEEN TWO NEIGHBOURING CONVOLUTIONS. AN EPOXY RESIN ADHESIVE LAYER MAY BE PROVIDED BETWEEN THE FERRULE AND THE SMOOTH INTERIOR SURFACE OF THE HOSE END, OR BETWEEN THE FITTING AND THE SMOOTH EXTERIOR SURFACE OF THE HOSE END, OR BOTH.

Claims