Classifications

• • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
  • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
  • F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
  • F16L33/00—Arrangements for connecting hoses to rigid members; Rigid hose-connectors, i.e. single members engaging both hoses
  • F16L33/20—Undivided rings, sleeves, or like members contracted on the hose or expanded inside the hose by means of tools; Arrangements using such members
  • F16L33/207—Undivided rings, sleeves, or like members contracted on the hose or expanded inside the hose by means of tools; Arrangements using such members only a sleeve being contracted on the hose
  • F16L33/2071—Undivided rings, sleeves, or like members contracted on the hose or expanded inside the hose by means of tools; Arrangements using such members only a sleeve being contracted on the hose the sleeve being a separate connecting member
  • F16L33/2073—Undivided rings, sleeves, or like members contracted on the hose or expanded inside the hose by means of tools; Arrangements using such members only a sleeve being contracted on the hose the sleeve being a separate connecting member directly connected to the rigid member
  • F16L33/2076—Undivided rings, sleeves, or like members contracted on the hose or expanded inside the hose by means of tools; Arrangements using such members only a sleeve being contracted on the hose the sleeve being a separate connecting member directly connected to the rigid member by plastic deformation

Definitions

• the present disclosure relates to flexible hose assemblies and to methods of making flexible hose assemblies. More particularly, the disclosure relates to flexible plastic hoses having a crimped end connection.
• a hose assembly includes a hose, a connector body, and a collar.
• the connector body has an outer end portion defining a fluid connector, an inner end defining a nose portion received in an inner bore of the hose end portion, and an intermediate portion including first and second annular flanges spaced apart to define a dog lock groove.
• the collar includes an outer end portion defining an inner radial dog lock received in the dog lock groove, an annular step portion extending radially outward of and axially inward of the dog lock in axial alignment with the first annular flange, and an inner end portion extending radially outward of and axially inward from the step portion, with the inner end portion being in radial compression against an outer surface of the hose end portion.
• the outer surface of the hose end portion has an outer diameter that is larger than an inner diameter of the step portion, such that the outer surface of the hose end portion is secured axially inward of the first annular flange.
• a hose assembly in accordance with another embodiment of one or more of the inventions presented in this disclosure, includes a hose, a connector body, and a collar.
• the connector body has an outer end portion defining a fluid connector, an inner end defining a nose portion received in the inner bore of the hose end portion, and an intermediate portion including first and second annular flanges spaced apart to define a dog lock groove.
• the collar includes an outer end portion defining an inner radial dog lock received in the dog lock groove and an inner end portion extending radially outward of and axially inward of the dog lock, with the inner end portion being in radial compression against the outer surface of the hose end portion.
• At least one of the first and second annular flanges defined a tapered side surface of the dog lock groove, with the dog lock contacting the tapered side surface of the dog lock groove to provide an electrically conductive connection between the collar end the connector body.
• a method of making a hose assembly is contemplated.
• a collar is provided, including an outer end portion defining an inner radial dog lock, an annular step portion extending radially outward of and axially inward of the dog lock, and an inner end portion extending radially outward of and axially inward from the step portion.
• a hose end is inserted into the inner end portion of the collar such that an axially outer edge of an outer surface of the hose end abuts an axially inner end of the annular step portion.
• a nose portion of a connector body is inserted through the outer end portion of the collar and into an inner bore in the hose end portion, such that the dog lock is axially aligned with an annular dog lock groove in an intermediate portion of the connector body.
• the collar is crimped radially inward, such that the dog lock is received in the dog lock groove, and the hose end portion is radially compressed between the inner end portion of the collar and the nose portion of the connector body.
• FIG. 1 is a cross-sectional view of a connector body securing collar for a hose assembly, in accordance with an exemplary embodiment of the present disclosure
• FIG. 1A is a partial cross-sectional view of a circled portion of the collar of FIG. i;
• FIG. IB is a partial cross-sectional view of another collar for a hose assembly, in accordance with another exemplary embodiment of the present disclosure;
• FIG. 2 is a cross-sectional view of the collar of FIG. 1 loosely assembled with a hose end;
• FIG. 3 is a cross-sectional view of the collar and hose end of FIG. 2, with a connector body inserted into the collar and hose end;
• FIG. 4 is a cross-sectional view of the collar, hose end, and connector body of
• FIG. 3 with the collar crimped into interlocking engagement with the connector body for sealing engagement between the connector body and the hose end;
• FIG. 4A is an enlarged partial cross-sectional view of a circled portion of the hose assembly of FIG. 4.
• a flexible plastic hose configured to provide, for example, desired system temperature ratings, system pressure ratings, and chemical compatibility, commonly includes an inner or core plastic (e.g., PTFE, PFA) tube and an outer sheath, cover or other such reinforcement layer (e.g., a metal braided sheath) providing protection for the core tube while permitting bending movement.
• an inner or core plastic e.g., PTFE, PFA
• an outer sheath, cover or other such reinforcement layer e.g., a metal braided sheath
• hose assemblies are commonly provided with any of a variety of end connections, including, for example, tube fittings, tube ends (e.g., for welding or installation in a tube fitting), or quick disconnect couplings, and therefore require a leak-tight connection between the inner and outer flexible hose tube components and the end connection.
• end connections may be crimped to the hose ends.
• alignment of the hose end within the connector to be crimped may present challenges, with proper alignment of the hose end within the end connection being difficult to determine or ensure.
• a connector body may be secured to a hose end by a crimped collar including an internal hose end locating feature configured to provide a tactile and/or visual indication of proper hose end insertion depth in the collar during installation of the hose end connection on the hose end.
• the hose end locating feature may be configured to position the hose end axially (i.e., along a central axis of the hose assembly components) inward of an interlocking annular flange of the connector body, for example, to prevent the capture of the hose sheath between the annular flange and a crimped interior surface of the collar.
• the connector body and collar may be provided in a variety of suitable materials, including, for example, metals (e.g., stainless steel).
• the hose end locating feature may be provided as an inward radial projection in the internal bore of the collar, positioned to radially align with or interfere with an outer surface of the hose end to provide a positive stop for the inserted hose end. While a variety of different inward radial projections may be utilized, in one exemplary embodiment, the hose end locating feature is provided as an annular step portion extending radially outward of and axially inward of an outer axial dog lock portion of the collar.
• FIGS. 1 and 1A illustrates an exemplary collar 10 for a hose end connection, including an outer end portion 11 defining an inner radial dog lock 12, an annular step portion 13 extending radially outward of and axially inward of the dog lock 12, and an inner end portion 14 extending radially outward of and axially inward from the step portion 13.
• the annular step portion 13 extends directly from the dog lock 12.
• the step portion 13' may be axially spaced apart from the dog lock 12', forming a separate rib of material.
• the step portion may not be circumferentially continuous, instead forming discrete protrusions around the inner periphery of the collar, sufficient to provide positive stop abutment for the hose end portion.
• the collar 10 may be used with a hose having a hose end with an outer surface an outer diameter that is larger than an inner diameter of the step portion, such that the outer surface of the hose end portion is secured axially inward of the first annular flange.
• hose may be utilized.
• a plastic (e.g., PTFE, PFA) hose may be provided with a flexible plastic core tube defining an internal bore or fluid passage, and an outer sheath (e.g., braided metal sheath), for example, to improve hose pressure containment and/or to protect the core tube from abrasion.
• FIG. 2 illustrates the collar 10 of FIG.
• an exemplary hose 20 including a hose end 21 having a plastic core tube 22 defining an internal bore 23, and an outer sheath 24 (e.g., braided metal sheath) covering the plastic core tube 22 to define an outer surface 25 of the hose 20.
• an outer diameter D1 of the hose end outer surface 25 is larger than an inner diameter D2 of the step portion 13, such that the step portion provides positive stop abutment for the inserted hose end 21.
• the inner end portion 14 may include a chamfered inner end 15, for example, to facilitate alignment and receipt of the hose end portion 21 into the inner end portion 14 of the collar 10.
• a collar 10 for a 1 ⁇ 2 inch hose has an inner end portion 14 diameter of about 0.65 inches, and a step portion 13 diameter D2 of about 0.63 inches.
• a nose portion of a connector body may be inserted through the outer end portion of the collar 11 and into the internal bore 23 of the core tube 22, with the collar 10 being crimped against the connector and the hose end 21 to provide a leak tight gripping engagement between the core tube 22 and the connector body nose portion, and to provide interlocking retention of the connector body with the collar 10.
• a connector body includes a dog lock groove disposed between first and second annular flanges on an intermediate portion of the connector body, with the dog lock portion of the collar being crimped into the dog lock groove for interlocking retention of the connector body with the collar.
• FIG. 3 illustrates the collar 10 and hose 20 of FIG. 2 assembled with an exemplary connector body 30, prior to crimped attachment, including an outer end portion 31 defining a fluid connector 32 (e.g., tube end, tube fitting, quick connect coupling), an inner end 33 defining a nose portion 34 received in the inner bore 23 of the hose end portion 21, and an intermediate portion 35 including first and second annular flanges 36, 37 spaced apart to define a dog lock groove 38.
• a fluid connector 32 e.g., tube end, tube fitting, quick connect coupling
• the nose portion 34 may include teeth or barbs 39 configured to provide an interference fit between the core tube 22 and the nose portion even before crimping attachment of the hose end connection.
• the connector body 30 may be provided with a tool engaging groove 41, which may be defined by an axial gap between the second annular flange 37 and a third annular flange 42 axially outward of the second annular flange.
• a gauge tool 50 may be received in or engaged with the tool engaging groove 41, with a gauge surface 51 (e.g., end of axial projection 52 extending axially inward from the tool engaging groove) of the tool 50 being positioned to abut an end face 16 of the outer end portion 11 of the collar 10 when the dog lock 12 is in proper axial alignment with the dog lock groove 38.
• a gauge surface 51 e.g., end of axial projection 52 extending axially inward from the tool engaging groove
• the tool engaging groove 41 may be adapted or adopted for additional uses.
• the tool engaging groove 41 may provide a location for fixturing (e.g., for welding operations) or for attachment of a protective end cap or other accessory.
• the tool engaging groove may provide a location for leak testing.
• one or more of the first annular flange 36, the second annular flange 37, and the dog lock 12 may be provided with a hole, notch, or other discontinuity configured to provide a passage for fluid that has leaked past the seal between the core tube 22 and the connector body nose portion 34.
• annular may include both features that are circumferentially continuous and features that have one or more discontinuities (e.g., an annular flange having one or more holes or notches).
• the collar 10 is crimped radially inward (e.g., using a conventional crimp machine), such that the dog lock 12 is received in the dog lock groove 38, and the inner end portion 14 of the collar 10 is radially compressed against the outer surface 25 of the hose end portion 21 to radially (and sealingly) compress the core tube 22 against the nose portion 34 of the connector body 30, as shown in FIG. 4.
• the barbs 39 on the nose portion 34 may provide increased gripping and sealing engagement between the core tube 22 and the nose portion.
• a portion of the crimped core tube 22 may be extruded between the first annular flange 36 and the annular step portion 13 without affecting the gripping and sealing retention of the hose 20 with the end connection.
• the relative axial widths and radial heights of the first annular flange 36 and annular step portion 13 may be selected to limit or control this extrusion.
• the annular step has an axial width that is slightly greater than an axial width of the first annular flange, and the radial heights of the first annular flange 36 and step portion 13 are selected to provide a small radial gap g (e.g., about 0.007 inches to about 0.013 inches, or about 0.01 inches) upon crimping.
• a dog lock groove of a crimped collar hose connection may be provided with at least one tapered side surface extending from a larger outer width of the groove to a smaller inner width of the groove, with the dog lock having an axial width greater than the inner width but smaller than the outer width.
• the second annular flange 37 defines a tapered side surface 38a of the dog lock groove 38, extending from a larger outer width wl of the groove to a smaller inner width w2 of the groove, with the dog lock 12 having an axial width w3 greater than the inner width w2 but smaller than the outer width wl.
• the tapered surface 38a may include a constant angle taper (i.e., frustoconical), for example, a 12° - 18° taper, or an approximately 15° taper, or may include a rounded or other such contoured tapered surface.
• the first annular flange may additionally or alternatively define a tapered side surface of the dog lock groove.
• the aligned, crimped dog lock is ensured of both (a) being sufficiently interlockingly received in the dog lock groove 38 and (b) being in contact with the side surfaces 38a, 38b of the dog lock groove.
• This contact may, for example, provide for an assurance of an electrically conductive connection between the collar end the connector body (provided in stainless steel or other conductive materials) in applications where this may be desirable. Additionally or alternatively, the contact may provide for more rigid mechanical affixation of the connector body 30 with the collar 10.

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• Engineering & Computer Science (AREA)
• General Engineering & Computer Science (AREA)
• Mechanical Engineering (AREA)
• Quick-Acting Or Multi-Walled Pipe Joints (AREA)
• Joints That Cut Off Fluids, And Hose Joints (AREA)
• Rigid Pipes And Flexible Pipes (AREA)

Priority Applications (4)

Applications Claiming Priority (2)

Publications (1)

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Family Applications (1)

Country Status (7)

Citations (6)

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• 2020
  • 2020-09-15 EP EP20781206.6A patent/EP4038303B1/en active Active
  • 2020-09-15 JP JP2022515967A patent/JP7713930B2/ja active Active
  • 2020-09-15 KR KR1020227006235A patent/KR102878408B1/ko active Active
  • 2020-09-15 CN CN202080060959.8A patent/CN114286910B/zh active Active
  • 2020-09-15 WO PCT/US2020/050806 patent/WO2021067026A1/en not_active Ceased
  • 2020-09-26 TW TW109133524A patent/TWI895286B/zh active
  • 2020-09-29 US US17/035,900 patent/US11543061B2/en active Active
• 2022
  • 2022-11-30 US US18/071,699 patent/US11927286B2/en active Active

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