Hose coupling

• US 4,690,435 A
• Filed: 03/07/1986
• Issued: 09/01/1987
• Est. Priority Date: 03/07/1986
• Status: Expired due to Term

• Current Assignee: Jack L. Ritzert, Joseph D. Blouin, Josephine A. Mowinski, Thomas J. Manning
• Original Assignee: Jack L. Ritzert, Joseph D. Blouin, Josephine A. Mowinski, Thomas J. Manning
• Inventors: Manning, Thomas J., Blouin, Joseph D., Ritzert, Jack L., Mowinski, Josephine A.
• Primary Examiner(s): NOT, DEFINED
• Application Number:
  US06/837,187
• Time in Patent Office: 543 Days
• Field of Search: 285/256, 285/259, 285/258
• US Class Current: 285/256
• CPC Class Codes: F16L 33/2076 by plastic deformation

Abstract

A hose coupling for permanent attachment to a hose having a reinforcing braid layer intermediate inner and outer layers of rubber or plastic has an outer sleeve which is circumferentially crimped to the hose at at least four axially spaced rings. The coupling includes a smooth walled insert inside the hose engaging the inner surface of the hose.

Claims

1. In a hose coupling of the type wherein an end section of a hose is inserted coaxially between an inner sleeve and an outer sleeve and the outer sleeve in subsequentially radially crimped at axially spaced locations to circumferentially clamp the hose end section against the inner sleeve;

the improvement wherein said hose coupling comprises a fitting including an elongate hollow tubular inner sleeve fixedly projecting from one end of said fitting to a distal end, said distal end of said inner sleeve having an annular outwardly convex curved surface, means defining a radially outwardly projecting annular flange on an inner sleeve adjacent said one end of said fitting, said inner sleeve having a smooth continuous cylindrical outer surface extending from said flange to said distal end, an elongate hollow tubular outer sleeve of uniform wall thickness coaxially mounted upon said inner sleeve, a radially inwardly projecting annular lip at one end of said outer sleeve radially overlapping and seated against the side of said flange adjacent said one end of said fitting, said outer sleeve extending from said flange to an outer end substantially aligned with said distal end of said inner sleeve, a hose having an end section coaxially received between said inner and outer sleeves with the end of said end section engaged with said flange and said lip, means defining at least four annular reduced diameter circumferentially crimped sections at uniformly spaced locations between the opposite ends of said outer sleeve, said crimped sections having an internal diameter less than the normal outer diameter of said hose to circumferentially clamp said hose against said smooth cylindrical outer surface of said inner sleeve at least four axially spaced locations, said crimped sections being separated from each other by outwardly bulged intermediate sections having a maximum internal diameter greater than that of the normal outer diameter of said hose, the outer end of said outer sleeve terminating at an outwardly flared end section having an annular chamfered inner edge radially spaced from the hose, the outer diameter D of such outer sleeve adjacent said annular lip is greater than the maximum diameter of said outwardly bulged inner portions and the maximum diameter of said flared end section is approximately equal to D.

2. In a hose coupling of the type wherein an end section of a hose is inserted coaxially between an inner sleeve and an outer sleeve and the outer sleeve in subsequentially radially crimped at axially spaced locations to circumferentially clamp the hose end section against the inner sleeve;

the improvement wherein said hose coupling comprises a fitting including an elongate hollow tubular inner sleeve fixedly projecting from one end of said fitting to a distal end, said distal end of said inner sleeve having an annular outwardly convex curved surface, means defining a radially outwardly projecting annular flange on said inner sleeve adjacent said one end of said fitting, said inner sleeve having a smooth continuous cylindrical outer surface extending from said flange to said distal end, an elongate hollow tubular outer sleeve of uniform wall thickness coaxially mounted upon said inner sleeve, a radially inwardly projecting annular lip at one end of said outer sleeve radially overlapping and seated against the side of said flange adjacent said one end of said fitting, said outer sleeve extending from said flange to an outer end substantially aligned with said distal end of said inner sleeve, a hose having an end section coaxially received between said inner and outer sleeves with the end of said end section engaged with said flange and said lip, means defining at least four annular reduced diameter circumferentially crimped sections at uniformly spaced locations between the opposite ends of said outer sleeve, said crimped sections having an internal diameter less than the normal outer diameter of said hose to circumferentially clamp said hose against said smooth cylindrical outer surface of said inner sleeve at least four axially spaced locations, said crimped sections being separated from each other by outwardly bulged intermediate sections having a maximum internal diameter greater than that of the normal outer diameter of said hose, the outer end of said outer sleeve terminating at an outwardly flared end section having an annular chamfered inner edge radially spaced from the hose, wherein the minimum internal diameter of said outer sleeve at said reduced diameter crimped sections and the normal outer diameter of said hose and the maximum internal diameter of said outwardly bulged intermediate sections are such that material of said hose displaced by said reduced diameter crimped sections fills the interior of the adjacent outwardly bulged sections, and

wherein the outer diameter D of said outer sleeve adjacent said annular lip is greater than the maximum diameter of said outwardly bulged inner portions and the maximum diameter of said flared end section is approximately equal to D.