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
  • F16L33/01—Arrangements for connecting hoses to rigid members; Rigid hose-connectors, i.e. single members engaging both hoses specially adapted for hoses having a multi-layer wall
• • 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
  • F16L33/22—Arrangements for connecting hoses to rigid members; Rigid hose-connectors, i.e. single members engaging both hoses with means not mentioned in the preceding groups for gripping the hose between inner and outer parts
  • F16L33/225—Arrangements for connecting hoses to rigid members; Rigid hose-connectors, i.e. single members engaging both hoses with means not mentioned in the preceding groups for gripping the hose between inner and outer parts a sleeve being movable axially

Definitions

• This invention relates to a hose coupling for multi-walled hoses, more particularly those hoses which are sold under the name "BI-WALL".
• hose which is utilised for this is a hose of plastics material having along its side a longitudinal pocket, there being small apertures in the wall of the hose j _0. opening into the pocket, and further apertures opening through the wall of the pocket. In this way the pressure is reduced so that the water then issues from the holes in the wall at a very low rate, or alternatively further outlets, or dripper units can be inserted into the
• a coupling member having a spigot and a ferrule, the spigot having a tapering portion terminating in a lip, and the ferrule also having an 5. inwardly directed lip to engage the lip on the spigot, the ferrule behind the lip having a recessed portion to accommodate the end of the hose.
• the spigot is a generally tubular member having at one end a threaded portion on which the ferrule 10. can be screwed, and at the other end having the portion to be attached to the hose.
• the end adapted to be coupled to the hose is provided with a nose portion which increases in diameter and terminates In a circumferential lip which faces toward __ ⁇ the screwed end of the spigot.
• the ferrule is a sleeve open at one end and at the other end having threaded portions adapted to co-operat with the threaded portion on the spigot.
• the ferrule at its c-pen end Is provided with an inwardly directed lip adapted to engage against the 25__ outwardly directed lip of the spigot.
• the ferrule between the lip and the threaded portion is provided with an increase area in diameter, so that there is a relatively large space between the ferrule and the tapered portion. This is to allow room for the end
• hoses utilising this principle of irrigation are formed from relatively 5. thin plastics material this being in the order of 0.4 millimetres in thickness, but can vary between 0.2 to 0.8 millimetres even up to 1.0 millimetres or more.
• FIG. 1 is a cross sectional view of a coupling according to the invention
• FIG. 2 is an enlargement of the portion circled 2o. of the coupling of FIG. 1 in use on a hose
• FIG. 3 is a side view of a second embodiment, the parts being shown in exploded view,
• FIG. 4 is a further side view turned 90° from FIG. 3 portion being sectioned
• FIG. 5 is a further side view turned 180 c from FIG. 3,
• FIG. 6 is a further side view turned 270 c from FIG. 3, and FIG. 7 is a view of the coupling member in assembled condition, portion being in section.
• the spigot 1 has a ferrule 2 mounted thereon, the ferrule having a threaded portion to engage the 5. threads 3 on the spigot.
• the threads 3 are a two start thread to give a large lead, and so apply the pincing pressure to the hose.
• the lip 4 on the spigot 1 has a face 7 on the side facing the ferrule 2, and similarly the ferrule 10. 2 has its lip 5 with a face 8 which would thus be opposite the face 7 on the spigot.
• a second embodiment is 10. shown of the invention.
• the spigot 10 has a co-operating ferrule 11 for attaching to the bi-wall hose, and a clawed ferrule 12 for attaching to a single wall hose to supply the water throught the coupling to the bi-wall hose.
• hose has an end 13 with a sloping portion 14 leading to the lip 15. Behind lip 15 there is a recess 16 and further sloping portion to a second lip 17 of slightly . - greater diameter than the first lip 15. Behind wall
• portion 19 of lesser 20 diameter of the lip 17, which portion 19 may be parallel or tapered by a small taper of the order of 2° to the cam or threaded portion 20.
• the spigot 10 at the cam portion 20 is provided with a cam or thread of large pitch, this being formed 25. with two circumferentially inclined ramps or camming surfaces 21 and 22, each terminating respectively in stop edges 23, 24.
• a connecting portion 25 having a parallel portion 26, an enlarged 0_ tapering portion 27 terminating in a ridge 28. Rearwardly of the region 28 there is a short taper portion 29
• OMPI leading to a parallel portion 30 extending to the end 31 for connecting to the supply hose.
• the ferrule 11 has at its forward end an inwardly tapered portion 32 leading to a parallel portion 32a 5. forming a lip 32b, this parallel portion 32 being provided with a plurality of fine circular grooves 33. These have a diameter such that the ferrule can be pushed with a frictional fit over the lip 17.
• the ramp cam operating portion 34 Rearwardly of the parallel portion there is provided 10.
• the rearward edge of the ferrule 11 being provided with a circumferentially inclined co-operating surface 35 to co-operate with cam surface 22.
• a co-operating surface 36 Internally of the ferrule 11 there Is provided a co-operating surface 36 to engage the ramp or cam surface
• the claw ferrule 12 comprises a body portion 37 having a tapered internal surface 38 to have the same general taper of the portion 27, but of greater diameter so that this portion of the ferrule would freely fit
• the ferrule 12 includes three claws 40 extending from the face 39 facing the main body of spigot, each claw 40 having an outer surface as an extension of the outer surface of the ferrule 12, and its inner surface Is an extension of the tapered
• the ferrule 11 On attaching the bi-wall hose the ferrule 11 is in position on the spigot 10 with the ferrule 11 screwed 5. to the fully engaged rearward portion. The bi-wall hose is then pushed on over the lips 15-17 to terminate on' the portion 19. The ferrule 11 is then screwed so that the tapered portion 32 engages the bi-wall hose folding it so that it seals against the lip 17. As
• the ferrule camming or screwing action has a large lead, it quickly engages the hose, and applied the pressure without there being any undue rotational movement of the ferrule on the hose.
• these hoses have a very small wall thickness, and thus the folding 5 to close the bi-wall portion and the sealing takes place without undue cutting action of the sealing components .

Landscapes

• Engineering & Computer Science (AREA)
• General Engineering & Computer Science (AREA)
• Mechanical Engineering (AREA)
• Infusion, Injection, And Reservoir Apparatuses (AREA)

Priority Applications (1)

Applications Claiming Priority (2)

Publications (1)

Family

ID=3769124

Family Applications (1)

Country Status (6)

Cited By (3)

Citations (6)

• 1982
  • 1982-05-31 GR GR68707A patent/GR78035B/el unknown
  • 1982-07-07 ZA ZA824838A patent/ZA824838B/xx unknown
  • 1982-07-08 WO PCT/AU1982/000108 patent/WO1983000206A1/en unknown
  • 1982-07-08 EP EP82902049A patent/EP0083605A1/en not_active Withdrawn
  • 1982-07-08 IT IT8253493U patent/IT8253493V0/it unknown
  • 1982-07-08 IT IT8267871A patent/IT8267871A0/it unknown
  • 1982-07-09 MA MA19737A patent/MA19529A1/fr unknown

Patent Citations (6)

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