Classifications

• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
  • B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
  • B21D39/00—Application of procedures in order to connect objects or parts, e.g. coating with sheet metal otherwise than by plating; Tube expanders
  • B21D39/04—Application of procedures in order to connect objects or parts, e.g. coating with sheet metal otherwise than by plating; Tube expanders of tubes with tubes; of tubes with rods

Definitions

• This invention relates to pipe crimping apparatus for crimping the joints of pipe connections of the type having non-flux, non-solder joints such as those describe! in my co-pending patent application No. GB 3913492 in which pipe ends are provided adjacent to their ends with a collar of increased diameter over which an end of a pipe connector is fitted, said pipe connector end having been swaged to a complimentarily dimensioned diameter to fit over the pipe end, the outer e i of said swaged end then being crimped over the side of the collar remote from the end of the pipe.
• the pipe ends are straight, and pipe connectors are provided in which a collar is pre-fitted into the or each swaged end of each pipe connector, and the swaged end partially crimped around said collar to retain it in position, the swaged end being fully crimped after the swaged end is fitted over one end of a pipe.
• 'swaged' is used herein to include the increasing in diameter at or adjacent to one or each end of a pi e or pipe connector by mechanical means or by the increase in diameter being formed as part of a casting of tne or each end of a pipe or pipe connector.
• SUBSTITUTESHEET crimping apparatus comprises nolding means to externally engage and hold a joint formed b_ ⁇ locating one end of a pipe connector onto a pipe end, the holding means having a crimping tool movable relative to the swaged end to cause the swaged end to be deformed and crimped onto the • pipe end.
• the holding means is elongate and at one end thereof has a gripping zone to engage behind the inner side of a swaged end of the pipe connector, and at the other end thereof the crimping tool movable
• the inward axial -. r movement of the tool preferably causes the inner side of the swaged end to be crimped to tne pipe end.
• the inward movement of the tool preferably causes the outer side of the swaged end to be crimped to the pipe end.
• the 2Q inward movement of the tool preferably causes the outer side and the inner side of the swaged end to be crimped to the pipe end.
• the apparatus is a hand held implement having an elongate handle, at one end of which 25 the elongate means are provided.
• the elongate means are
• SUBSTITUTESHEET preferably a pair of jaw members, each being concave and together forming a clamping zone.
• One or other or both of said members preferably is adapted for movement to an open position to allow the jaw members to be located around a pipe connection then closed to hold same.
• the crimping tool desirably is in two parts with one for each jaw member. Each part of the tool desirably is an arcuate wall which extends beyond the end remote from the gripping zone.
• the means to cause movement of the tool is a lever mounted at the end of the jaw members remote from the gripping zone with one end adapted to engage the projecting ends of the walls. Movement means is desirably provided to cause the lever to urge the walls towards the gripping zone.
• one jaw member is stationary with the handle, and the other member is hinged thereto.
• a bolt arrangement is preferably provided to urge the hinged member into a closed position with the other member.
• the bolt is preferably securable in said urged position.
• the walls are mounted onto their respective members by a fastener and are each provided with a slot about their mounting to allow for restricted lengthwise movement.
• the projecting end of the walls are each preferably provided with an outward flange to overlie their respective member. The said one end of the
• SUBSTITUTESHEET lever is preferably bifurcated.
• the means to move the lever may be a ram and piston arrangement operated hydraulicall , pneumatically or hydro-pneu atically.
• the lever may be operated by a Bowden cable.
• the holding means is a clamp to be secured around the joint with the crimping tool between the clamp and the joint, and means are provided to caus the crimping tool to deform the swaged end.
• Tne crimpin tool is preferably in two or more pieces assembled around the joint with the holding means retaining the pieces together.
• Fig. 1 is a perspective view of a pipe crimping apparatus according to a first embodiment of the presen invention
• Fig. 2 is a perspective view of the apparatus according to a second embodiment
• Fig. 3 is a perspective view of a cable operating device for use with the apparatus of the second embodiment
• Fig. 4 is a plan view of an apparatus according t a third embodiment
• Fig. 5 is an end view of the apparatus shown in
• Figs. 6A and 6B are respectively opposite side views in the direction of arrows 'A* and '3' shown in Fig. 5;
• Fig. 7 is a side view of an apparatus according to a fourth embodiment.
• Fig. 8 is a side view of an apparatus according to a fifth embodiment.
• a pipe crimping apparatus generally comprises a hand held implement having an elongate handle 10, at one end of which elongate holding means, in the form of a pair of jaw memoers 12, 14, are provided with its axis at right angles to the axis of the handle 10. Tne jaws of both members 12, 14 are similar and concave, and together the concavities of the members form a cylindrical clamping zone with a gripping zone in the form of elements 16 at one end thereof. Jaw member 14 is stationary with the handle 10 and jaw member 12 is hinged thereto to allow the jaw members 12, 14 of the tool to be opened and located around a pipe connection (not shown) and then closed to hold same.
• the jaw members 12, 14 are spring biased apart to the open positions.
• a crimping tool is provided at the other end of the jaw members 12, 14 and comprises an inner arcuate wall 18 for each jaw member. The walls 13 extend beyond the end remote from the
• SUBSTITUTESHEET elements 16 are movable relative to its member 12, 14 in a direction longitudinal of the clamping zone and adapted for movement towards or away from the gripping elements 16.
• the walls 13 are each provided with a slot 24 and are mounted onto their respective members 12, 14 • by a fastener 22 whose head marginally overlaps the sides of the respective slot 24 to allow for tneir restricted lengthwise movement.
• the marginal sides of the respective slot 24 are recessed so that the head of the fastener 22 does not project out beyond the wall's inner face.
• the projecting end of the walls 18 are each provided with an outward flange 26 to overlie their respective member.
• Spring biasing such as in the form of helical springs 25, is provided between the top of the members 12, 14 and their respective flanges 26 and is provided to bias the walls 13 to their outer extent of movement.
• the gripping elements 16 are contoured to complement the curved shape of the inner side of a swaged end of a pipe connector, and the inner ends of walls 13 are cut away from the inside to outside wall to a thickness the same as, or approximately the same as, the thickness of the swaged end of the pipe connector.
• the inner walls may be recessed over most of their length to allow the crimping tool to be used with closely adjacent swaged ends, the recessing of the walls
• SUBSTITUTESHEET allowing a second swaged end to be positioned within the tool but not being acted on by the tool.
• Means to cause axial movement of the tool is a lever 20 mounted, to act as a simple lever about fulcrum pivot pin 23, at the end of the jaw members 12, 14 remote from the gripping elements 16 with one end adapted to engage the flanges 26 of the projecting ends of the walls 18.
• the pin 23 is provided between two opposed cheeks 27 provided upstanding on a mounting 29 pivotally connected to the handle 10.
• the said one end of the lever 20 is bifurcated as shown with both arms overhanging said flanges 26.
• the lever 20 is pivotal to allow it to swivel to fit around a pipe located projecting from the clamping zone.
• a bolt arrangement is provided comprising a bolt
• the movement of the bolt 30 is controlled by a knob 32 slidable along a slot 36 to urge the bolt 30 against the hinged member into a closed position with the other member.
• the axes of the slot 36 and bore 34 are parallel to the longitudinal axis of the handle 10.
• the longitudinal movement of the bolt 30 towards the members 12, 14 causes the outer end of the bolt 30 to abut a cheek 38 on the hinged member 12.
• the slot 36 has a right-angled extension 40, and the bolt 30 is securable against major axial movement in the handle 10 in said urged position by the knob 32 being moved along said extension 40.
• SUBSTITUTESHEET Movement means is provided to cause the lever 20 to urge the walls 18 towards the elements 16 so to crimp an inner side, or an outer side, or both inner and outer sides of a swaged end of a pipe connector to a pipe end when such is located therein.
• the movement means to move the lever 20 is a first piston and cylinder arrangement 42 operated hydraulically, pneumatically or hydro-pneumatically.
• the cylinder is a bore provided in the handle 10 adjacent to the members 12, 14 and having an axis at right angles to the handle 10.
• the piston floats in the cylinder and is movable in response to fluid being fed thereinto through a narrow bore 44 from a supply of fluid fed to the end of the handle 10 remote from the jaw members 12, 14.
• a second piston and cylinder arrangement 46 is provided as shown and serves, wnen extended, to urge the bolt 30 into tight abutment with the cheek 33 of member 12 so to retain it in tight abutment with member 12.
• the cylinder of the arrangement 46 is a bore 56 lengthwise of the handle 10 and the piston of the arrangement 46 is formed in two parts, a first part 48 adjacent to the supply end of the fluid and a second part 50 to which the knob 32 is secured as shown.
• the first part 43 is secured against rotational movement by a slot 53 being provided in the wall of the bore 56 and a grub screw 60, whose outer end slides in
• the implement In use, the implement is hand held and after a pipe connector is located on a pipe end, is used to crimp it, by axial compression against its outer end and behind the inner side of the swaged end, in position in the manner hereinbefore described.
• the bolt arrangement may be mechanically operated without assistance from the lever movement means.
• the lever 20 may be operated by a Bowden cable 62, the otner end of which is connected to a cable operatin device as shown in Fig. 3.
• a Bowden cable 62 the otner end of which is connected to a cable operatin device as shown in Fig. 3.
• like parts are denoted by like numerals.
• the slot 36 does not have an extension 40.
• the handle 10 is of a different construction and appearance.
• the bolt 30 has a corresponding shaped bar 64 spaced therefrom and parallel thereto as shown and between which at the member remote end, has a transom 66 to whicn the cable 62 is secured, the core cable 68 passing through a bore in the transom to be secured to a wedge 70 movable alon a surface 72, provided in a housing 76, to engage under the end of lever 20 to pivot it about pin 28 to abut th bifurcated end against the flanges 26.
• the bolt 30 is secured by knob 32 being in the form of a clamping nut in screw threaded engagement with a screw-threaded element secured to bolt 30, the clamping nut being clamped against bolt housing 74.
• the housing 76 provides spring-biasing to return the lever 20 to its original position and also wedge 70 when the cable 63 i released.
• the cable operating device (Fig. 3) is a stand 80 naving a rod 82 along which a key 84 is provided.
• a cylinder 86 is low-friction movable lengthwise along said rod 32, the cylinder 36 having a groove 83 to engage said -key 84 whereby to prevent the
• SUBSTITUTESHEET cylinder 86 from rotational movement.
• the cylinder 86 on its outside surface as shown mounts a plate 90 to which the cable 56 is secured with core cable 68 passing through a hole 92.
• the core cable 68 is secured to cranked handle 94 pivotally mounted to anchorage 96 secured to cylinder 86 as shown.
• the crimping to the swaged end may alternatively be by spot or dot crimping rather than as above described with the full annular inner, outer or both inner and outer sides of the swaged end being crimped.
• the holding means includes a first clamp 100, in the form a 'G' type clamp, to be secured around and hold tne pipe connector 102.
• a second clamp 104 is to be secured around the joint with the crimping tool 106 between the clamp 104 and the joint.
• the crimping tool 106 is in two or more pieces, two pieces 106A and 1063 in this embodiment, assembled around the joint with the second clamp 104 retaining the pieces together.
• the two pieces are two halves of a pulley wheel, each having a concave crimping configuration on the inside.
• the pieces each have a lateral extension 110 which together
• the second clamp 104 comprises a ' ⁇ ' shaped wire clip 108 to fit into the groove of the pulley wheel with the outer ends of the limbs of the clip 108 being splayed apart as shown and engaging through holes in and behind a union plate 112 which serves to join the first clamp 100 and the second clamp 104 together.
• Means are provided to cause the crimping tool 106 to deform the swaged end, the means comprising a screw threaded spindle 114 in engagement with a tapped bore 116 in the plate 112 and movable towards or away from engagement with the groove of the pulley wheel by rotation of a knob 118 provided at the outer end of the spindle 114.
• the first clamp 100 is positioned and clamped to the pipe connector 102.
• the crimping tool 106 is assembled around the joint and the second clamp 104 is assembled therearound as shown and described above.
• the knob 118 is turned to urge the inner end of the spindle 114 into the groove.
• the crimping tool 104 is rotated causing the swaged end to be deformed.
• the knob 118 is tightened so that after several turns, the swaged end is deformed to crimp it onto the pipe end and form a joint.
• the holding means is a clamp 120 being in two pieces 120A and 120B secured together by bolts and nuts 122.
• the crimping tool 124 is in two pieces, one on the inside of each piece 120A and 120B.
• the tool 120 is shown for use in dot or spot crimping with protrusions 125 shown extending inwardly from the tool to abut the swaged end of the pipe connector 128.
• the piece 120B of the tool 120 is provided with a flat surface 129 against which the means to cause deformation of the swaged end is urged, the means being a hammer (not shown).
• the apparatus of this embodiment is used as described.
• the apparatus is similar to that described in the fourth embodiment and like parts will be denoted by like numerals.
• the holding means is in two pieces 130A and 130B hinged together at 132 and connected together b_ a clip 134.
• a spindle 136 is provided to operate in a similar action to spindle 114, the spindle being in screw threaded engagement with a tapped bore in piece

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• Engineering & Computer Science (AREA)
• Mechanical Engineering (AREA)
• Clamps And Clips (AREA)
• Hand Tools For Fitting Together And Separating, Or Other Hand Tools (AREA)
• Automatic Assembly (AREA)

Priority Applications (1)

Applications Claiming Priority (2)

Publications (2)

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ID=10639684

Family Applications (1)

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• 1988
  • 1988-07-01 GB GB888815643A patent/GB8815643D0/en active Pending
• 1989
  • 1989-07-03 DE DE1989609764 patent/DE68909764T2/de not_active Expired - Fee Related
  • 1989-07-03 AU AU39803/89A patent/AU628367B2/en not_active Ceased
  • 1989-07-03 EP EP19890908451 patent/EP0375772B1/de not_active Expired - Lifetime
  • 1989-07-03 WO PCT/GB1989/000746 patent/WO1990000097A1/en active IP Right Grant
• 1990
  • 1990-02-21 GB GB9003935A patent/GB2230989B/en not_active Expired - Lifetime

Non-Patent Citations (1)

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