End fitting

• US 4,603,888 A
• Filed: 09/18/1985
• Issued: 08/05/1986
• Est. Priority Date: 09/18/1985
• Status: Expired due to Term

• Current Assignee: Dixon Valve and Coupling Company
• Original Assignee: Dixon Valve & Coupling Company, LLC
• Inventors: Singh, Paramjit, Goodall, Richard L.
• Primary Examiner(s): Arola, Dave W.
• Application Number:
  US06/777,350
• Time in Patent Office: 321 Days
• Field of Search: 285/256, 285/259, 285/174, 285/149, 285/55, 285/40, 285/252, 285/253, 285/243, 285/251, 285/332.3, 138/109
• US Class Current: 285/55
• CPC Class Codes: F16L 33/01 adapted for hoses having a multi-layer wall
• CPC Class Codes: F16L 33/2076 by plastic deformation

Abstract

An end fitting for rubber steam hoses with metal liners of interlocking construction comprises a stem that has zig-zag serrations formed on an intermediate portion of its outer surface for contacting and retaining the inside of a rubber hose, and has rib-type right hand spirals formed on an inner end portion of its outer surface so that a metal liner of interlocking construction is adapted to be screwed onto the spirals for retention of the metal liner from being pulled off the ste. on the stem and preventing the metal liner from being pulled off the stem. A clamp is provided that clamps the rubber hose against the zig-zag serrations to seal the end fitting against the escape of steam, and clamps the rubber hose against the metal liner and the metal liner against the spirals and the inner end portion of the stem outer surface to provide added retention of the metal liner from being pulled off the stem. A portion of the metal liner is always between the stem and the clamp to provide this extra retention and safety against the metal liner being pulled off the stem.

Claims

1. An end fitting assembly for rubber steam hoses with metal liners of interlocking construction comprising

a stem having an outer end portion, an intermediate portion and an inner end portion,

said intermediate portion and inner end portion being received within the hose,

zig-zag serrations formed on and circumferentially around the outer surface of the intermediate portion of the stem contacting and retaiing the inside of a rubber hose,

rib-type hand spirals formed on the outer surface of the stem'"'"'s inner end portion so that the metal liner of interlocking construction is screwed onto the spirals for retention of the metal liner on the stem and preventing the metal liner from being pulled off the stem,

and clamping means for clamping the rubber hose against the zig-zag serrations of the intermediate portion of the stem for sealing the end fitting against the escape of steam, and for clamping the rubber hose against the metal liner and the metal liner against the spirals and stem inner end portion to provide added retention of the metal liner from being pulled off the stem,

the length of the stem inner portion in relation to the length of the clamping means being such that a portion of the metal liner is always between the stem and the clamping means to provide extra retention and safety against pull out.

2. The end fitting assembly of claim 1, further including

an integral collar at the juncture between the intermediate stem portion and the outer stem portion to act as an end stop for the end of the rubber hose and also to act as an end stop that is engaged by the clamping means.

3. The end fitting assembly of claim 1, further including

a nut that is assembled onto the stem outer end portion,

said nut having a female spud mounted thereto.

4. The end fitting assembly of claim 1,

said clamping means being a clamp.

5. An end fitting assembly for rubber steam hoses with metal liners of interlocking construction comprising

a stem having an outer end portion, an intermediate portion, and an inner end portion,

said intermediate portion and inner end portion being received within the hose,

zig-zag serrations formed on and circumferentially around the outer surface of the intermediate portion of the stem contacting and retaining the inside of a rubber hose,

rib-type right hand spirals formed on the outer surface of the stem'"'"'s inner end portion so that the metal liner of interlocking construction is screwed onto the spirals for rentention of the metal liner on the stem and preventing the metal liner from being pulled off the stem,

and clamping means for clamping the rubber hose against the zig-zag serrations of the intermediate portion of the stem for sealing the end fitting against the escape of steam, and for clamping the rubber hose against the metal liner and the metal liner against the spirals and stem'"'"'s inner end portion to provide added retention of the metal liner from being pulled off the stem,

the length of the stem inner portion in relation to the length of the clamping means being such that a portion of the metal liner is always between the stem and the clamping means to provide extra retention and safety against the metal liner being pulled off the stem,

an integral collar between the stem'"'"'s intermediate portion and the stem'"'"'s outer portion to act as an end stop for the end of the rubber hose and also to act as an end that is engaged by the clamping means,

a nut that is assembled onto the stem outer end portion,

said nut having a female spud mounted thereto,

said clamping means being a clamp.