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 invention relates to an improved hose fitting and to a method of making the hose fitting.
• Hose fittings are well known in the art.
• An example of a prior art hose fitting is shown in United States Patent No. 4,366,841. Normally, the end of a hose is inserted between a socket member of the hose fitting and the exterior of the hose fitting body.
• the hose fitting normally includes a plurality of wrench flats which define a wrenching hex.
• the hose body was machined from hex-shaped bar stock.
• a retaining groove or annular channel was then machined behind the wrenching hex.
• a hose coupling nut was then crimped to the body forming a lip which engaged with the previously machined annular channel.
• the socket was then crimped to the body in an opposed relationship with the coupling nut to complete the final hose fitting.
• the present invention is directed to an improved hose fitting and method in which material waste is substantially reduced and the method requires only a one-step assembly process.
• the improved hose fitting and the method of making the hose fitting, according to the present invention results in a fitting which reduces waste and allows a one-step assembly process.
• the improved hose fitting includes a longitudinally extending body having a central opening therethrough.
• the body has a coupling end and a hose end.
• the body defines-a ⁇ annular channel adjacent the hose connection end.
• a coupling nut is slid over the body and an annular lip or shoulder on the coupling nut is received in the annular channel of the body.
• a coupling member is positioned on the coupling end of the body.
• a socket surrounds the body and has a first end and a second end. A mandrel or support is introduced or moved into the central opening within the body.
• One end of the socket is then engaged by a plurality of movable jaws which compress the end of the socket onto the body to form a tight fit.
• the compression by the jaws form wrench flat surfaces which define an overall wrench hex in the hose fitting.
• a plurality of circumferentially extending grooves are defined in the body member and the socket defines a plurality of annular projections. During the compressing step, the projections are received by the mating grooves on the body.
• FIG. 1 is a perspective view of an improved hose fitting according to the present invention
• Fig. 2 is an exploded view, partially in cross section, of the improved hose fitting shown in Fig. 1 ;
• FIG. 3 is an enlarged partially sectional view taken along the line 3-3 of Fig. 1 ;
• Fig. 4 is a simplified perspective view of a prior art forming machine used to produce the hose fitting shown in Fig. 1 ;
• Fig. 5 is an enlarged perspective view, shown partially in cross section, of a portion of the machine shown in Fig. 4 illustrating the method of making the improved hose fitting of Fig. 1 and show-ng the jaws in an open position;
• Fig. 6 is a fragmentary cross-sectional view, partially in cross section, taken along the line 6-6 of Fig. 5;
• Fig. 7 is a view similar to Fig. 5, showing the jaws in a closed position
• Fig. 8 is another embodiment of an improved hose fitting, according to the present invention.
• Fig. 9 is a sectional view, taken along the line 9-9 of Fig. 8.
• the hose fitting 10 includes a longitudinally extending body 1 1 having a central opening 12 extending therethrough.
• the body 1 1 includes a coupling end 13, which defines an annular shoulder or annular channel 14 and a hose end 1 5.
• a coupling nut 17 having an annular flange or lip 1 8 is mounted over the body 1 1 (see Fig. 3) in a manner wherein the annular lip 1 8 of the coupling nut 17 is received in the annular channel 14 defined by the body 1 1 .
• a socket 20 having a first end 21 and a second end 22 surrounds the body 1 1 .
• the first end 21 has a reduced diameter and surrounds a band portion 24 of the body 1 1 .
• a portion of the socket 20 is compressed onto the body 1 1 forming a tight fit.
• the band portion 24 defines a plurality of grooves 25 and the first end 21 of the socket 20 defines a plurality of inwardly directed projections 27.
• the projections 27 of the socket 20 are received and tightly engage the grooves 25 of the body 1 1 .
• all three components of the hose fitting 10, namely the body 1 1 , the coupling nut 1 7 and the socket 20, are comprised of metal.
• the hose fitting 30 includes an elbow shaped body 31 having a coupling end 32 and a hose end 33.
• a socket 35 having a first end 36 and a second end 37 surrounds the body 31 .
• a hose 39 is received between and tightly held by the socket 35 and the body 31 of the hose fitting 30.
• the first end 36 of the socket 35 includes an in-turned lip 41 which is received in an annular channel 42 defined in the body 31 . After compression, the lip 41 and channel 42 are tightly engaged and a plurality of arcuate surfaces 44 are formed on the first end 36 of the socket 35.
• a plurality of arcuate surfaces 45 are also defined on the enlarged portion of the socket 35.
• a coupling namely an end ring 47, is mounted on the coupling end 32 of the body 31 .
• an elbow shaped body such as shown in Fig. 8 can be connected to the socket in a manner similar to the Fig. 3 connection.
• FIG. 4 shows a prior art forming machine 50 which includes a fixed ring 51 and a hydraulically driven platen 52.
• a plurality of rods 53 extend from the platen 52 and mount a ring platform 54.
• Pins 57 extending from the jaws 56 are guided by radial guide tracks 58 defined in the ring platform 54.
• the jaws 56 are spring-biased outwardly toward the fixed ring 51 .
• the jaws 56 include contact faces 60 which engage and compress the sockets 20 and 35 of the hose fittings 10 and 30.
• Figs. 5-7 illustrate the method of constructing the hose fitting
• the hose fitting 30 is made in a generally similar manner. Referring to Fig. 2, when constructing the hose fitting 10, initially the coupling nut 1 7 is slid over the body 1 1 until the annular lip 18 is in position adjacent the annular channel 14 of the body 1 1 . The socket 20 is the positioned over the body 1 1 wherein the first end 21 of the socket 20 is adjacent the coupling end 13 of the body 1 1 . This assembly is then mounted in the forming machine 50, as indicated in Fig. 5. A support mandrel 62 is inserted in the body 1 1 through the central opening 12. The mandrer 62 fills the opening- 2 and supports-- the body 1 1 during compression so that the body 1 1 is not deformed on its interior.
• the fixed ring 51 of the forming machine 50 includes an inclined face 64 and the jaws 56 include mating inclined faces 65.
• the forming machine 50 includes cylinder means which move the ring platform 56 and the jaws 56 outwardly whereby the mating inclined faces 65 of the jaws 56 engage the inclined face 64 of the machine fixed ring 51 .
• the continual outward movement of the platform 54 forces the jaws 56 inwardly.
• the platen and jaws remain stationary and the ring platform is driven inwardly to obtain the desired relative movement.
• the jaw faces 60 engage and compress the first end 21 of the socket 20 onto the body 1 1 of the hose fitting 10 to form a tight fit.
• the plurality of annular and inwardly directed projections 27 mate with the circumferentially extending grooves 25 defined by the body 1 1 . This further ensures a tight fit after compression.
• the compressed position of the components is indicated in Fig. 7.
• the contact faces 60 of the radially movable jaws 56 have compressed the socket 20 and have defined the wrench flats 29.
• the support mandrel 62 is removed together with the finished hose fitting 10 and another hose fitting assembly cycle started.
• the forming machine 50 moves the ring platform 54 to the Fig. 5 position wherein the jaws are urged by spring means outwardly to the Fig. 5 position for the start of another cycle.
• the method of making the improved hose fitting 30 is similar.
• the socket 35 is positioned on the body 31 and the assembly inserted in the machine 50.
• the jaws 60 compress the end 36 of the socket 35 to form the arcuate surfaces 44. In separate operations the

Landscapes

• Engineering & Computer Science (AREA)
• General Engineering & Computer Science (AREA)
• Mechanical Engineering (AREA)
• Joints That Cut Off Fluids, And Hose Joints (AREA)
• Lining Or Joining Of Plastics Or The Like (AREA)
• Hand Tools For Fitting Together And Separating, Or Other Hand Tools (AREA)

Priority Applications (1)

Applications Claiming Priority (2)

Publications (1)

Family

ID=21751814

Family Applications (1)

Country Status (4)

Cited By (10)

Families Citing this family (1)

Citations (7)

• 1993
  • 1993-12-14 WO PCT/US1993/012197 patent/WO1994018487A1/en not_active Ceased
  • 1993-12-14 AU AU59516/94A patent/AU5951694A/en not_active Abandoned
• 1994
  • 1994-01-05 MX MX9400280A patent/MX9400280A/es unknown
  • 1994-01-13 TW TW83100221A patent/TW229255B/zh active

Patent Citations (7)

Also Published As

Similar Documents

Legal Events