US3225583A - Manually operable crimping tools - Google Patents

Manually operable crimping tools Download PDF

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Publication number
US3225583A
US3225583A US205817A US20581762A US3225583A US 3225583 A US3225583 A US 3225583A US 205817 A US205817 A US 205817A US 20581762 A US20581762 A US 20581762A US 3225583 A US3225583 A US 3225583A
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US
United States
Prior art keywords
piston
crimping
manually operable
spring
bore
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
US205817A
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English (en)
Inventor
Walton William
Faulkner Arthur Manthorp
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
KEMBREY WIRING SYSTEMS Ltd (FORMERLY KNOWN AS PLESSEY WIRING SYSTEMS LIMITED)
Original Assignee
Plessey Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
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Publication date
Application filed by Plessey Co Ltd filed Critical Plessey Co Ltd
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Publication of US3225583A publication Critical patent/US3225583A/en
Assigned to KEMBREY WIRING SYSTEMS LIMITED (FORMERLY KNOWN AS PLESSEY WIRING SYSTEMS LIMITED) reassignment KEMBREY WIRING SYSTEMS LIMITED (FORMERLY KNOWN AS PLESSEY WIRING SYSTEMS LIMITED) ASSIGNMENT OF ASSIGNORS INTEREST. Assignors: PLESSEY COMPANY LIMITED, THE,
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
    • H01R43/00—Apparatus or processes specially adapted for manufacturing, assembling, maintaining, or repairing of line connectors or current collectors or for joining electric conductors
    • H01R43/04—Apparatus or processes specially adapted for manufacturing, assembling, maintaining, or repairing of line connectors or current collectors or for joining electric conductors for forming connections by deformation, e.g. crimping tool
    • H01R43/042—Hand tools for crimping
    • H01R43/0427—Hand tools for crimping fluid actuated hand crimping tools

Definitions

  • This invention relates to manually operable crimping tools and has for an object to provide an improved crimping tool in which a crimping operation requiring a considerable amount of total energy expenditure can be effected by a hand tool adapted for one handed operation and not requiring any external power supply.
  • a further object is to provide a crimping tool of this kind in which the final pressure applied to the crirnped connection is independent of the operators manual effort.
  • a still further object of the invention is the provision of a hand operated crimping tool which prevents the production of faulty crimps by ensuring that in each crimping operation a crimping force is supplied whose magnitude is determined only by the dimensions of the crimp.
  • the movement of the crimping jaws during the crimping operation is arranged to be produced by the release of energy from an energy store which between crimping operations is chargeable by manual means.
  • the store conveniently consists of a spring which is tensioned during the opening of the crimping jaws.
  • the spring may be a metal spring and is preferably a multi-disc spring, which permits ready realisation of a spring of comparatively small dimensions having a high spring rate.
  • the spring is combined with automatic retaining means permitting the loading of the spring to be effected in stages, for example by means of a hydraulic piston device which through suitable valve means co-operates with a hand-operated piston pump.
  • FIGURES 1 to 4 of the drawing accompanying the specification illustrate one embodiment of the invention, in which the crimping tool is of the kind described in our co-pending U.S.A. application No. 111,866 permitting the geometrical shape of the aperture formed by the crimping jaws to remain constant over a relatively wide range.
  • FIGURE 1 is a sectional side elevation of the device
  • FIGURE 2 is a rear elevation
  • FIGURE 3 is a fragmentary plan view, partly in section on line 33 of FIGURE 2, and
  • FIGURE 4 is a fragmentary section on line 44 of FIGURE 1.
  • FIGURES 5 and 6 of the accompanying drawing are respectively a sectional elevation and a cross-section on line 66 of FIGURE 5 of a modified embodiment.
  • the crimping tool has a body 1, to which a frame member 2 is attached by screws 9.
  • a number of crimping jaws 3 are guided, substantially in the manner described in our said co-pending application, so as to enclose between the jaws a crimping aperture which, upon movement of one of the jaws in a predetermined direction, progressively decreases in size without appreciably altering its geometrical shape.
  • a return spring 4 is provided for opening the crimpings jaws after the crimping operation has been completed.
  • a thrust pin 5 which is adapted to act upon the said jaws to effect the crimping operation, and which is connected to a piston member 6 which is slidable axially of the thrust pin 5 in a cylinder bore 7 of a housing 8 which is integral with the body 1.
  • the cylinder bore 7 constitutes a container which is closed at one end by the body 1 and at its other end by a plug 10, and a multi-disc compression spring 11, centered on a guide rod 12, is interposed between the piston member 6 and the plug 10 within the cylinder bore to constitute an energy store having inherent damping.
  • the remainder of the bore is adapted to be filled with a hydraulic liquid, and the chambers formed between the piston and the respective ends of the bore 7 are interconnected through a passage including bores 13 and 14 and the bore 15 of a pump cylinder member 16 accommodated in a further bore of the housing 8, a non-return valve 17 being arranged to co-operate with one end of the cylinder bore 15 for retaining the charge in the energy store.
  • a ram-type piston 18 slides in the cylinder bore 15 and, as shown in FIG. 3, is connected by a swivel connection to a cross head 76 carried by link rods 19 pivoted by screw pivots to one end of a hand lever 20.
  • FIG. 1 The latter, as shown in FIGURE 1, is pivoted by a fulcrum pin 21 in a pistol-grip portion 22 integral with the housing 8.
  • a spring 23 biases the lever 20 to move out of the pistol grip 22, thereby moving the piston 18 away from the valve 17 and the piston 18 has an axial end bore 70 which penetrates into a cross bore 71 at a distance from the end of the ram piston.
  • the cross bore 71 communicates with a cross bore 73 in the cylinder member 16, leading to an annular chamber 72 which is connected by the bore 14 to that part of the housing bore 7 which contains the multi-disc spring 11, which serves as a reservoir for hydraulic liquid.
  • Liquid from this reservoir can now flow into the part of the cylinder bore 15 between piston 18 and non-return valve 17.
  • the piston 18 will force liquid from the space between the piston member 6 and plug 10 into the space between piston 6 and body 1, thereby moving the piston member 6 to compress the spring 11.
  • the non-return valve 17 will prevent liquid from flowing back, under the action of the spring 11, when the hand lever 20 is subsequently released and returned by the spring 23 to its projecting position, causing the piston 18 to admit a further quantity of liquid from the reservoir chamber between piston 6 and the plug 10 into the pump cylinder 15.
  • a movement of the lever 20 into the handle 22 beyond the normal end position of the pumping stroke causes the end of piston 18 to strike the non-return valve 17 and lift it from its seat.
  • the pump cylinder member is further provided with a cross bore 74 of the cylinder member 16 which, similarly to the bore 73, communicates through bore 14 with that part of the housing bore 7 which contains the compression spring 11.
  • the lever 20 In order to prevent movement of the lever 20 to this position during the loading of the spring 11 constituting the power reservoir and thus to prevent premature discharge of the power reservoir, the lever 20 carries an adjustable stop pin 24 which normally terminates the inward movement of the lever 20 by contact with a raised portion 25 of the periphery of a stop cam 26 which is fixed on a rotatable pin 27.
  • This pin is journalled in the pistol-grip handle 22 and carries a release latch 28 outside the said handle.
  • the cam 26 can be turned, after the reservoir has been adequately charged, to a position in which the abutment pin 24 faces a portion 29 of the cam periphery which has a smaller distance from the axis of the rotatable pin than the portion 25, thus permitting the hand lever 20 to be moved inwardly of the pistol grip 22 sufficiently to cause the piston 18 to raise the non-return valve 17.
  • the stop cam 26 is further equipped with a pair of dogs 30 which at an intermediate position of the latch 28 engage a groove 31 or equivalent lateral recesses of the abutment pin 24.
  • the hand lever 20 may, after charging of the power reservoir, be retained, before the crimping operation proper, in a position corresponding approximately to the end of the normal pumping stroke, thus avoiding the necessity of carrying out a further pumping stroke, involving unnecessary effort, after the insertion of the parts to be crimped, before the valve 17 can be opened to commence the crimping stroke of pin 5.
  • the guide rod 12 is secured in the piston member 6 and slides in a blind bore 78 of the plug member 10, the end of this bore communicating with the reservoir space between plug and piston member 6 through a bore 32, and a pressurized buffer reservoir 33, FIG. 2 for hydraulic liquid is arranged to communicate by a passage 34 with the bore 7 between the piston member 6 and the plug 10 to compensate for the excess in cross section of the guide rod 12 in the chamber between the piston member 6 and the body 1 over the thrust pin 5 in the chamber at the opposite side of the piston member 6.
  • FIGURES 1 to 4 may be modified in a number of details without exceeding the scope of the invention, and FIGURES 5 and 6 illustrate by way of example a modified construction which is both more compact and of simpler construction than the embodiment described with reference to FIG- URES 1 to 4.
  • Equal reference numbers in FIGURES S and 6 refer to parts which are identical or substantially identical With those illustrated in FIGURES 1 to 4, and reference is made to the description of those figures for their operation.
  • An important modification relates to the arrangement of the charging pump to its actuating lever.
  • a hand lever 50 is employed which extends along the housing 8 and is pivoted to it by a pin 51' arranged at the rear end of the housing 8, away from the frame member 2 and diametrically opposite to the side of the housing 8 along which the lever 50 extends.
  • the piston 6 is coupled to the end of the thrust pin 5 by a thrust ring 52 which rests on an internal shoulder of the piston, and which on its back surface carries a plug member 53 supporting the spring of the non-return valve 17.
  • the ram piston 48 is urged away from the thrust member 5 by a spring 43 which acts on a head 54 provided at the end of a reduced-diameter stem 79 of the ram 48, and the lever 50 is arranged to act on the head 54 through a roller 49 which is adjustable by being carried by an arm 55, pivoted on the same pin 51 as the lever 50 having an adjustable set pin 56 co-operating with a thrust pad 57 of the lever 50.
  • Fixed to the end of the arm 50 which is nearest to the frame 2 is a headed locking pin 58 which, during normal pumping operation to charge the spring 11, terminates the inward stroke of the lever 50 by striking a toe 59 of a locking ring 60, 61 which performs the function of cam 26 of FIGURE 1.
  • the portion 61 of the locking ring 60 forms a shell having an aperture 62 suitably positioned and sufficiently wide for the head 58 to pass freely through it.
  • a tab 63 enables the ring to be turned from the position just described first to a crimping position, in which the pin 58 faces another similar aperture 64, in which it is, however clear of the toe 59, thus allowing the lever 50 to be moved further so as to cause the ram 48 to lift the non-return valve 17 from its seat, thus similarly as in FIGURE 1 releasing the liquid under pressure trapped between the piston 6 and the body member 1, allowing it to return to the reservoir chamber between the piston 6 and the outer end member 40, and the crimping operation is then performed by the stored energy of the spring 11.
  • the apertures 62 and 64 of the ring portion 61 are connected by a relatively narrow slot 65 wide enough to clear the stem of the pin 58 but not its head, so that when the ring member 60, 61 and the lever 50 are in the illustrated central position, the lever 50 is locked in that position.
  • a pin 66 co-operating with a slot 67 in the inner ring member 60, serves to limit the movement of the ring 60, 61 in the range of these three positions, in each of which a ball catch 68 is arranged to engage one of three rests 69 in the body 1.
  • a manually operable crimping tool having a main body including means for supporting at least two crimping jaws movable relative to each other, the combination comprising elastic means mounted in said body to form a damped chargeable energy store, reciprocatory storecharging means supported in said body and operatively connected to said elastic means, said store-charging means being manually operable to deform said elastic means in step-by-step fashion for charging the store, retaining means automatically locking the store against discharge from any one of a plurality of degrees of charging, means manually operable to release said elastic means by rendering said retaining means inoperative, and means coupling at least one of said crimping jaws to said elastic means for moving such jaw towards another of said crimping jaws under the elastic force released by said elastic means when the retaining means has been rendered inoperative.
  • a crimping tool as claimed in claim 1 including a pressure container, a piston member forming a movable partition in said container, said piston member being supported at one side against said elastic means, a manually operable piston pump having a delivery line equipped with a non-return valve normally preventing return flow from said container to the piston pump and leading to said part of the pressure container to the part located at the other side of the piston member, and means manually operable to open a restricted low pressure outlet from said part of the container.
  • a crimping tool as claimed in claim 1 including a pressure container, a piston member forming a movable partition in said container, a compression spring constituting the elastic means, said piston member being supported at one side against said spring, a manually operable piston pump having a delivery passage equipped with a non-return valve normally preventing return flow from said container to the piston pump, said passage leading to the part of said pressure container that is located at the other side of the piston member, and means manually operable to open a low-pressure outlet from the said part of the container.
  • a crimping tool as claimed in claim 7 further ineluding an operating hand lever extending along the container.

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  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Quick-Acting Or Multi-Walled Pipe Joints (AREA)
  • Coating Apparatus (AREA)
US205817A 1961-06-02 1962-05-29 Manually operable crimping tools Expired - Lifetime US3225583A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB19986/61A GB1016253A (en) 1961-06-02 1961-06-02 Improvements in or relating to manually operable crimping tools

Publications (1)

Publication Number Publication Date
US3225583A true US3225583A (en) 1965-12-28

Family

ID=10138427

Family Applications (1)

Application Number Title Priority Date Filing Date
US205817A Expired - Lifetime US3225583A (en) 1961-06-02 1962-05-29 Manually operable crimping tools

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US (1) US3225583A (de)
BE (1) BE618407A (de)
GB (1) GB1016253A (de)
NL (1) NL278959A (de)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3327514A (en) * 1964-10-01 1967-06-27 Rheem Mfg Co Portable apparatus for fastening casings and the like
WO2009003790A1 (de) * 2007-06-30 2009-01-08 Erwin Schmucker Vorrichtung zur bearbeitung von werkstücken

Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1874460A (en) * 1930-06-27 1932-08-30 John E P Cox Prick punch
US2004459A (en) * 1934-12-03 1935-06-11 Boehnke Charles Dinger
US2235591A (en) * 1940-04-11 1941-03-18 Louis Bonin Saw set
US2375734A (en) * 1945-05-08 Machine tool
US2721491A (en) * 1954-03-30 1955-10-25 Joy Mfg Co Impact means for power-operated pipe wrench
US2729063A (en) * 1954-05-14 1956-01-03 Manco Mfg Co Hydraulic tool
US2821877A (en) * 1956-02-02 1958-02-04 Greenlee Bros & Co Portable hydraulic press tool
US3085813A (en) * 1960-04-27 1963-04-16 Sp Mfg Corp Quick change chuck

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2375734A (en) * 1945-05-08 Machine tool
US1874460A (en) * 1930-06-27 1932-08-30 John E P Cox Prick punch
US2004459A (en) * 1934-12-03 1935-06-11 Boehnke Charles Dinger
US2235591A (en) * 1940-04-11 1941-03-18 Louis Bonin Saw set
US2721491A (en) * 1954-03-30 1955-10-25 Joy Mfg Co Impact means for power-operated pipe wrench
US2729063A (en) * 1954-05-14 1956-01-03 Manco Mfg Co Hydraulic tool
US2821877A (en) * 1956-02-02 1958-02-04 Greenlee Bros & Co Portable hydraulic press tool
US3085813A (en) * 1960-04-27 1963-04-16 Sp Mfg Corp Quick change chuck

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3327514A (en) * 1964-10-01 1967-06-27 Rheem Mfg Co Portable apparatus for fastening casings and the like
WO2009003790A1 (de) * 2007-06-30 2009-01-08 Erwin Schmucker Vorrichtung zur bearbeitung von werkstücken

Also Published As

Publication number Publication date
GB1016253A (en) 1966-01-05
BE618407A (fr) 1962-10-01
NL278959A (de)

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