Dual layer hose with venting port
AssigneeSwagelok Company
InventorStephen J. Zaborszki
Life of this patent
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Abstract
A hose assembly includes an inner core tube, a metal outer tube, a first coupling member, and a first collar. The first coupling member has an inboard nose portion extending into a first end of the inner core tube. The metal outer tube surrounds the inner core tube and terminates at a first end axially inward of the first end of the inner core tube, with an outer cavity disposed between the inner core tube and the metal outer tube. The first collar has an outboard clamping portion surrounding the nose portion for clamping retention of the first end of the inner core tube therebetween, and an inboard venting portion welded to the first end of the metal outer tube, with the inboard venting portion including a venting port in fluid communication with the outer cavity.
Claims18
A hose assembly comprising:
- an inner core tube;
- a first coupling member having an inboard nose portion extending into a flared first end of the inner core tube;
- a metal outer tube surrounding the inner core tube and terminating at a first end axially inward of the first end of the inner core tube, with an outer cavity disposed between the inner core tube and the metal outer tube;
- and
- a first collar having:
- an outboard clamping portion surrounding the nose portion for clamping retention of the first end of the inner core tube therebetween;
- and
- an inboard venting portion welded to the first end of the metal outer tube, the inboard venting portion including a venting port in fluid communication with the outer cavity;
- wherein:
- an outboard end of the outboard clamping portion has a first inner diameter sized to accommodate the flared first end of the inner core tube;
- an inboard end of the outboard clamping portion includes a radially inward protrusion having a second inner diameter smaller than the first inner diameter and sized to impede withdrawal of the flared first end of the inner core tube from the first collar;
- and
- the inboard venting portion has a third inner diameter larger than the second inner diameter and sized to permit fluid flow between the outer cavity and the venting port.
A method of making a hose assembly, the method comprising:
- welding an inboard portion of a first collar to a first end of a metal outer tube, the inboard portion of the first collar including a venting port;
- installing an inner core tube through the metal outer tube, such that a first end of the inner core tube is aligned with an outboard portion of the first collar, with an outer cavity disposed between the inner core tube and the metal outer tube and in fluid communication with the venting port;
- and
- inserting a nose portion of a first coupling member into the first end of the inner core tube, such that the first end of the inner core tube is flared into clamping retention between the nose portion and the outboard portion of the first collar.
Dependencies are inferred from the claim text.