Flexible metal hose connector and method of forming same
AssigneeSwagelok Quick-Connect Co.
InventorsStephen J. Zaborszki, Gregory Kreczko
Life of this patent
Estimating the term…
Abstract
An end fitting is secured to a flexible metal hose comprised of a corrugated tube enclosed in a tubular braid in a manner that provides a single weld operation. An end of the hose is cut to bring the tube and braid ends into alignment. Thereafter, an end fitting is moved over the hose end and radially swaged into gripping engagement with the hose. A circumferential deep penetration weld integrally secures all the components, namely, the tube, the braid, and the fitting.
Claims6
A method of securing a fitting to a flexible cylindrical metal hose end wherein the flexible metal hose includes a corrugated tube with a braid received over the tube, the method comprising the steps of:
- a) providing a metal fitting including a generally cylindrical first body section having a first end and a second end with a cylindrical bore sized to closely receive the end of the flexible metal hose extending axially inwardly from the first end toward the second end to define a continuous cylindrical side wall terminating in a radially inwardly extending shoulder, the side wall being of a relatively uniform first thickness from the first end to a first point spaced a short distance from the shoulder and a substantially thinner second thickness from the first point to the shoulder;
- b) cutting the end of the hose to terminate the corrugated tube and the braid in substantially the same plane perpendicular to the axis of the hose;
- c) inserting the cut end of the hose into the cylindrical bore of the fitting to bring the cut end into engagement with the shoulder;
- d) deforming the first body section radially inward to mechanically interlock the braid, tube, and fitting together;
- and,
- e) welding the fitting to the braid and tube in the area of the thinner second thickness of the first body section from the first point to the shoulder.
A method of securing a fitting to a flexible cylindrical metal hose end wherein the flexible metal hose includes a corrugated tube with a braid received over the tube, the method comprising the steps of:
- a) providing a metal fitting including a generally cylindrical first body section having a first end and a second end with a cylindrical bore sized to closely receive the end of the flexible metal hose extending axially inwardly from the first end toward the second end to define a continuous cylindrical side wall terminating in a radially inwardly extending shoulder, the side wall being of a relatively uniform thickness from the first end to the shoulder but having a radially inwardly extending circumferential groove located intermediate the first end and the shoulder with a thinner wall section at the bottom of the groove;
- b) cutting the end of the hose to terminate the corrugated tube and the braid in substantially the same plane perpendicular to the axis of the hose;
- c) inserting the cut end of the hose into the cylindrical bore of the fitting to bring the cut end into engagement with the shoulder;
- d) deforming the first body section radially inward to mechanically interlock the braid, tube, and fitting together and create intimate contact therebetween;
- and,
- e) providing a deep penetration weld continuously about the fitting at the bottom of the groove to weld the fitting to the braid and tube to produce a sealed connection between the fitting and the hose at a location spaced from the cut end of the hose.
Dependencies are inferred from the claim text.