Classifications

• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
  • B25B—TOOLS OR BENCH DEVICES NOT OTHERWISE PROVIDED FOR, FOR FASTENING, CONNECTING, DISENGAGING OR HOLDING
  • B25B13/00—Spanners; Wrenches
  • B25B13/46—Spanners; Wrenches of the ratchet type, for providing a free return stroke of the handle
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
  • B25B—TOOLS OR BENCH DEVICES NOT OTHERWISE PROVIDED FOR, FOR FASTENING, CONNECTING, DISENGAGING OR HOLDING
  • B25B13/00—Spanners; Wrenches
  • B25B13/10—Spanners; Wrenches with adjustable jaws
  • B25B13/12—Spanners; Wrenches with adjustable jaws the jaws being slidable
  • B25B13/14—Spanners; Wrenches with adjustable jaws the jaws being slidable by rack and pinion, worm or gear

Definitions

• the present invention relates to an adjustable wrench of the kind comprising partly a wrench head provided with a fixed jaw and an adjustable jaw displaceable by means of a ratchet and pertaining adjusting worm, partly a shaft connected to the wrench head, said shaft and wrench head being interconnected units preferably separately manufactured.
• the invention has for its object a method for making such a wrench.
• Adjustable wrenches of the conventional make have the wrench head and the shaft or handle made in one integral piece and are generally produced by die forging. This means that the same high quality material has to be used for both the wrench head and the handle, even if, from the viewpoint of its strength, it could be motivated to make the handle of a cheaper material.
• the machining technique it additionally involves a complication to make the wrench head and handle in one integral piece, in particular, if it is desirable to have plane guide and abutting surfaces between the wrench head and the ratchet of the slidable jaw in order to minimize deformations with the wrench loaded.
• the mentioned drawbacks are first of all essentially avoided by the fact that the wrench has the characteristics set forth in the head claim and is made in accordance with the method indicated by the characteristics of claim 2.
• Figs, 1a and 1b are schematical lateral views of two mirror symmetrical halves of a wrench head of a so called adjustable ratchet wrench, the displaceable jaw, adjusting worm and certain other details being removed;
• Fig. 2 is a section along line II - II of the wrench head halve according to Fig. la, seen from the top;
• Fig. 3 is a lateral view of a conventional adjustable wrench partly in section, the slidable jaw, adjusting worm and certain other details likewise being removed;
• Fig. 4 is a section of the same wrench along line IV - IV in
• Fig. 3; Fig. 5 is a sectional view of the slidable jaw of an adjustable wrench;
• Fig. 6 is a sectional view along line II - Ila in Fig. la of a wrench head comprising two mirror symmetrical halves of the kind shown in Figs, 1a and 1b;
• Fig. 7 is a corresponding sectional view of an embodiment of the wrench head shown in Fig. 6.
• the two mirror symmetrical wrench head halves 1, 2 as shown in Figs 1a and 1b are intended to be parts of an adjustable ratchet wrench of the type illustrated and described in the Swedish patent No.
• each wrench head half is made separately, for example by rolling, sintering, stamping, casting, die forging and/or punching and is in this way furnished with the said notches and grooves as well as any holes required.
• the method offers special advantage in case the ratchet of the slidable jaw is provided with plane guide and contact surfaces, which preferably are at least approximately perpendicular to the principal plane of the wrench and are to engage corresponding guide and contact surfaces 5 of the channels or axle journals of the wrench halves, as seen in Fig. 2.
• the two wrench head halves 1, 2 may preferably be made of strips, flat rolled steel or sheet material suitable for stamping operations which material at certain places may be completed by spacers or washers so that the wrench head obtains the necessary thickness all over.
• the gauge of the jaw of the wrench head may exceed the double plate gauge and therefore should be completed by such spacers or washers.
• the washers 9 are here put into place suitably in connection with the joining of the two wrench head halves, which can be effected by a welding or cementing operation or the like.
• the jaws may be made as separate units of any material having the gauge required for the same and then being fixed by welding, the use of special spacers or washers being thereby avoided.
• the wrench handle is only indicated by dash lines in the lower wrench head half 1 in Fig. 1b and here designated by 10.
• the handle of this embodiment is pivotally joined to the wrench head by a pivot and is in this case intended to be made in a shell construction.
• the handle may optionally be made of a solid material and in a conventional manner by die forging or by precision or shell mold forging, respectively.
• the two wrench head halves are provided with one another corresponding holes one of which, i.e. the hole 11, is designed for the adjusting worm, while the other, hole 12, is to take up the mentioned pivot.
• the third hole 13 which is oblong and circularly bent with the pivot as its centre, is designed to embrace a spring and arresting mechanism of a kind known per se and acting inbetween the wrench head and the handle.
• the holes 11, 12 and 13 may, owing to circumstances, be made either when manufacturing each wrench head half or simultaneously for both halves after putting together and joining the same.
• the wrench head 14 illustrated un Figs. 3 and 4 and relating to a wrench of the conventional type is rigidly connected to the handle 16 by a screw joint, welding seem 15 or the like, and consists likewise of two mirror symmetrical halves, of which only one is shown in a lateral view in Fig. 3 and in section along line IV - IV in Fig. 4.
• These two halves are made in accordance with the method according to the invention and are, in the same way as the wrench head halves 1, 2 shown in Figs, 1a, 1b and 2, provided with notches and grooves which, by putting together and joining the two halves, form the channels and axle journals 17, 18 required for the ratchet of the displaceable jaw, and for the axle of the worm.
• the handle 16 may, of course, be made in a conventional manner, for example by die forging of solid material or in a shell construction by joining several parts produced by stamping of strips or sheet material or in any other manner, e.g. by precision casting, shell mold casting, sintering, or the like. The same may also be the case with the handle 10.
• the two wrench head halves according to Figs, la and lb are wholly mirror symmetrical.
• the wrench head in such a way that only the outer end portion thereof comprising the stationary jaw and the channel-like notches consists of two mirror symmetrical halves whereas the inner end portion of the wrench head is made integral to one of said helves or constitutes a separately fabricated portion which by a welding operation or suchlike is connected to the mirror symmetrical portions at their inner ends.
• the wrench head has an outer end portion comprising two mirror symmetrical parts 21, 22 joined to one another by a welding or cementing operation.
• the lower of said parts 22 is made integral with an inner end portion 23 of the wrench head.
• Said inner end portion 23 has an inclined surface 24 abutting a corresponding surface on the part 21 and joined therewith by welding or cementing.
• Fig. 7 which likewise is a transverse section of & wrench head has an outer end portion comprising two mirror symmetrical parts 25, 26 joined to one another by a welding or cementing operation.
• the inner end portion 27 in this case, however, is provided with a suitably V-formed joint surface 28 abutting a corresponding joint surface formed by the two parts 25, 26 of the outer end portion and joined therewith by welding or cementing.
• the handle made integral with one of the mirror symmetrical halves or members of the wrench head and by a welding or cementing operation connected to the other of said halves or members.
• the handle may also be made in two mirror symmetric halves one of which being integral with one of the mirror symmetrical halves of the wrench head and the other of which is made integral with the other of the mirror symmetrical halves of the wrench head said units being finally interconnected by a welding or cementing operation.

Landscapes

• Engineering & Computer Science (AREA)
• Mechanical Engineering (AREA)
• Forging (AREA)
• Extrusion Moulding Of Plastics Or The Like (AREA)
• Details Of Spanners, Wrenches, And Screw Drivers And Accessories (AREA)

Priority Applications (1)

Applications Claiming Priority (2)

Publications (1)

Family

ID=13471315

Family Applications (1)

Country Status (7)

Cited By (5)

Citations (5)

• 1979
  • 1979-06-07 JP JP7181179A patent/JPS55164479A/ja active Pending
• 1980
  • 1980-05-21 WO PCT/SE1980/000148 patent/WO1980002668A1/en not_active Application Discontinuation
  • 1980-05-21 AU AU59890/80A patent/AU544393B2/en not_active Ceased
  • 1980-05-21 BR BR8008913A patent/BR8008913A/pt unknown
  • 1980-12-15 EP EP80901021A patent/EP0035501A1/en not_active Ceased
• 1981
  • 1981-02-05 NO NO810396A patent/NO810396L/no unknown
  • 1981-09-25 CA CA000386684A patent/CA1200994A/en not_active Expired

Patent Citations (5)

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