EP1918070B1 - Adjustable spanner for preventing nut from rounding apex - Google Patents

Adjustable spanner for preventing nut from rounding apex Download PDF

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Publication number
EP1918070B1
EP1918070B1 EP06120848A EP06120848A EP1918070B1 EP 1918070 B1 EP1918070 B1 EP 1918070B1 EP 06120848 A EP06120848 A EP 06120848A EP 06120848 A EP06120848 A EP 06120848A EP 1918070 B1 EP1918070 B1 EP 1918070B1
Authority
EP
European Patent Office
Prior art keywords
fixing
movable
nut
jaw
protrusion
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.)
Active
Application number
EP06120848A
Other languages
German (de)
French (fr)
Other versions
EP1918070A1 (en
Inventor
Arthur Wu
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.)
Proxene Tools Co Ltd
Original Assignee
Proxene Tools 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.)
Filing date
Publication date
Application filed by Proxene Tools Co Ltd filed Critical Proxene Tools Co Ltd
Priority to PL06120848T priority Critical patent/PL1918070T3/en
Priority to DK06120848.4T priority patent/DK1918070T3/en
Priority to EP06120848A priority patent/EP1918070B1/en
Priority to DE602006018954T priority patent/DE602006018954D1/en
Priority to AT06120848T priority patent/ATE491549T1/en
Priority to ES06120848T priority patent/ES2358122T3/en
Publication of EP1918070A1 publication Critical patent/EP1918070A1/en
Application granted granted Critical
Publication of EP1918070B1 publication Critical patent/EP1918070B1/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

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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
    • B25B13/10—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 adjustable spanners, and particularly to an adjustable spanner for preventing a nut from rounding apexes.
  • An adjustable spanner has two jaws for clamping a nut. Generally, in operation, the apex of the nut will round in operation. Thus there are many designs for improving above mentioned defects, which are for example, USP 5878636 , USP 3916735 , USP 191892 , USP 5152198 , USP 1632911 , USP 1309860 , and Taiwan Patent 302793 , and USP 6848343 . Taiwan Patent 302793 , and USP 6848343 are invented by the inventor of the present invention, in that inner surfaces of the jaws are formed with protrusions and recesses.
  • the designs are only suitable for some specific nuts, they can not be used to various nuts of different specifications.
  • the adjustable spanner is used for various nuts of different specifications, and thus the above mentioned designs are not suitable for the adjustable spanner.
  • the nuts have different sizes, pitch, helix angle, etc.
  • the adjustable spanner must be suitable for these nuts.
  • the recesses in the inner surfaces of the two jaws of an adjustable spanner cannot make apexes of nuts of different specifications falling into the recesses. Thus, the apexes of the nuts are possibly rounded by the wearing from the jaws.
  • US A 5 239 899 discloses a wrench for driving a nut that utilizes curved drive faces.
  • the drive faces are convex and protrude inward toward a center line between the jaw portions. Notches are formed on each drive face near the free end.
  • One wrench is adjustable, having a positioner that pushes the nut outward as the movable jaw closes. The positioner maintains the nut in a position in contact with the curved drive surfaces.
  • US A 4 838 132 discloses an adjustable wrench comprising a handle, a stationary outer jaw member integrally formed with the handle and having at least one outer face and a support surface for a moveable jaw, and a moveable jaw member riding on the support surface and continuously supported thereby during its entire range of movement, the moveable jaw member having an inner face parallel to the stationary outer face whereby the turning of a nut placed between the stationary outer face and the moveable inner face creates a force a part of which is applied to the moveable jaw member in a direction perpendicular to the direction of travel of the moveable jaw member thereby forcing the moveable jaw member against the support surface.
  • FR 1 072 636 discloses an adjustable wrench, with a movable jaw having a movable surface smaller than the fixing surface of the fixing jaw, to allow a more convenient reverse operation of the adjustable wrench.
  • the primary object of the present invention is to provide an adjustable spanner which comprises the features of claim 1.
  • FIG. 1 and 2 the jaw structure of an adjustable spanner of the present invention is illustrated.
  • the present invention has the following elements.
  • a body 1 has handle 10.
  • a receiving groove 23 longitudinally penetrating through the handle 10.
  • One end of the handle 10 has an enlarged head 20.
  • One end of the head 20 is extended with a fixing jaw 21.
  • An upper side of the h ead 20 is formed with a sliding surface 221.
  • the head 20 has a transversal sliding trench 22.
  • the sliding trench 22 is communicated to the receiving groove 23.
  • a movable jaw 24 is installed in the sliding trench 22.
  • a directional control element 25 is installed in the receiving groove 23 and is engaged to the movable jaw 24. When the directional control element 25 is rotated, the movable jaw 24 is driven to move long the sliding trench 22 so as to change the distance between the fixing jaw 21 and movable jaw 24.
  • the directional control element 25 may be for example a worm rod as shown in the drawing, or a button or a wedge member, etc.
  • the main feature of the present invention is that a fixing surface 21 of the fixing jaw 21 and a movable surface 241 of the movable jaw 24 facing to the fixing surface 211 are parallel.
  • a cambered or trapezoidal protrusion 212 is formed at a lower side of the fixing surface 211.
  • a receiving recess 214 is formed at a lower side of the fixing surface 211 for receiving an apex B of a nut.
  • An inclined resisting surface 213 is formed between the recess 214 and the sliding surface 22 for resisting a nut.
  • a cambered or trapezoidal movable protrusion 242 is formed at a lower side of the movable surface 241.
  • the movable surface 241 has a long recess 244 between the protrusion 242 and the movable surface 243 for receiving an apex B 1 of a nut.
  • a line Y is defined from a top end of the fixing surface 211 to the sliding surface 22.
  • a line X is defined to be an axial line of the sliding trench 22.
  • the angel ⁇ between the line Y and the line X is less than 90 degrees, preferably, between 65° - 85°. More preferably, it is 74°.
  • the movable protrusion 242 can resist a center position of an edge A of a great nut 40, a middle nut 30a and a small nut 30b.
  • a line X2 is vertical to an edge A of a nut as the nut is placed between the two jaws with one side resisting against the fixing jaw 21 and one side resisting against the resisting surface.
  • the angle ⁇ is 74°
  • the angle ⁇ b between the line X1 and X2 is 16°.
  • Fig. 7 it is illustrated that the nut is rotated through 16 degrees from the orientation in Fig. 8 .
  • the movable protrusion 242 still resists against at a center position of the edge A.
  • the apexes B, B1 are in the recesses 214, 244, as illustrated in Figs. 3 to 5 .
  • the apexes 214, 244 are not in contact with the spanner.
  • the apexes will not be damaged.
  • the apexes of the nut will not round. Thereby for the nut with rounded apex, the spanner of the present invention can drive it well.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Details Of Spanners, Wrenches, And Screw Drivers And Accessories (AREA)
  • Supports For Pipes And Cables (AREA)
  • Forms Removed On Construction Sites Or Auxiliary Members Thereof (AREA)
  • Devices For Conveying Motion By Means Of Endless Flexible Members (AREA)
  • Valve Device For Special Equipments (AREA)
  • Paper (AREA)
  • Endoscopes (AREA)

Abstract

An adjustable spanner (1) comprises a handle (10); one end of the handle having an enlarged head (20); an upper side of the head being formed with a sliding surface (221); a fixing jaw (21) extending from one end of the head; the fixing jaw having a fixing surface (211); a fixing protrusion (212) being formed at an upper side of the fixing surface; a movable jaw (24) installed in a sliding trench (22); the movable jaw having a movable surface (241); a directional control element (25) being installed in a receiving groove (23) and engaged with the movable jaw; a movable protrusion (242) being formed at a lower side of the movable surface; a line Y being defined from a top end of the fixing surface along the fixing surface towards the sliding surface; a line X being defined to be an axial line of the sliding trench, the angel ˜ between the line Y and the line X is between 65° and 85°, preferably is 74°.

Description

    FIELD OF THE INVENTION
  • The present invention relates to adjustable spanners, and particularly to an adjustable spanner for preventing a nut from rounding apexes.
    • Background of the invention
  • An adjustable spanner has two jaws for clamping a nut. Generally, in operation, the apex of the nut will round in operation. Thus there are many designs for improving above mentioned defects, which are for example, USP 5878636 , USP 3916735 , USP 191892 , USP 5152198 , USP 1632911 , USP 1309860 , and Taiwan Patent 302793 , and USP 6848343 . Taiwan Patent 302793 , and USP 6848343 are invented by the inventor of the present invention, in that inner surfaces of the jaws are formed with protrusions and recesses.
  • In above mentioned structure, the designs are only suitable for some specific nuts, they can not be used to various nuts of different specifications. However, the adjustable spanner is used for various nuts of different specifications, and thus the above mentioned designs are not suitable for the adjustable spanner. The nuts have different sizes, pitch, helix angle, etc. However, the adjustable spanner must be suitable for these nuts. The recesses in the inner surfaces of the two jaws of an adjustable spanner cannot make apexes of nuts of different specifications falling into the recesses. Thus, the apexes of the nuts are possibly rounded by the wearing from the jaws.
  • US A 5 239 899 discloses a wrench for driving a nut that utilizes curved drive faces. The drive faces are convex and protrude inward toward a center line between the jaw portions. Notches are formed on each drive face near the free end. One wrench is adjustable, having a positioner that pushes the nut outward as the movable jaw closes. The positioner maintains the nut in a position in contact with the curved drive surfaces.
  • US A 4 838 132 discloses an adjustable wrench comprising a handle, a stationary outer jaw member integrally formed with the handle and having at least one outer face and a support surface for a moveable jaw, and a moveable jaw member riding on the support surface and continuously supported thereby during its entire range of movement, the moveable jaw member having an inner face parallel to the stationary outer face whereby the turning of a nut placed between the stationary outer face and the moveable inner face creates a force a part of which is applied to the moveable jaw member in a direction perpendicular to the direction of travel of the moveable jaw member thereby forcing the moveable jaw member against the support surface.
  • FR 1 072 636 discloses an adjustable wrench, with a movable jaw having a movable surface smaller than the fixing surface of the fixing jaw, to allow a more convenient reverse operation of the adjustable wrench.
    • SUMMARY OF THE INVENTION
  • Accordingly, the primary object of the present invention is to provide an adjustable spanner which comprises the features of claim 1.
  • The various objects and advantages of the present invention will be more readily understood from the following detailed description when read in conjunction with the appended drawings.
    • BRIEF DESCRIPTION OF THE DRAWINGS
    • Fig. 1 is a perspective view of the adjustable spanner of the present invention.
    • Fig. 2 is a plane view of the adjustable spanner of the present invention.
    • Fig. 3 is a schematic view showing the operation of the present invention, where the present invention is used to clamp a great nut.
    • Fig. 4 is a schematic view showing the operation of the present invention, where the present invention is used to clamp a middle nut.
    • Fig. 5 is a schematic view showing the operation of the present invention, where the present invention is used to clamp a small nut.
    • Fig. 6 is a schematic view showing that the adjustable spanner of the present invention clamps a nut.
    • Fig. 7 shows the nut in Fig. 6 being rotated through one angle.
    • Fig. 8 shows the nut illustrated in Fig. 6.
    DETAILED DESCRIPTION OF THE INVENTION
  • In order that those skilled in the art can further understand the present invention, a description will be provided in the following in details. However, these descriptions and the appended drawings are only used to cause those skilled in the art to understand the objects, features, and characteristics of the present invention, but not to be used to confine the scope and spirit of the present invention defined in the appended claims.
  • Referring to Figs. 1 and 2, the jaw structure of an adjustable spanner of the present invention is illustrated. The present invention has the following elements.
  • A body 1 has handle 10. A receiving groove 23 longitudinally penetrating through the handle 10.
  • One end of the handle 10 has an enlarged head 20. One end of the head 20 is extended with a fixing jaw 21. An upper side of the h ead 20 is formed with a sliding surface 221. The head 20 has a transversal sliding trench 22. The sliding trench 22 is communicated to the receiving groove 23.
  • A movable jaw 24 is installed in the sliding trench 22. A directional control element 25 is installed in the receiving groove 23 and is engaged to the movable jaw 24. When the directional control element 25 is rotated, the movable jaw 24 is driven to move long the sliding trench 22 so as to change the distance between the fixing jaw 21 and movable jaw 24. However, above mentioned structure is known in the prior art. The directional control element 25 may be for example a worm rod as shown in the drawing, or a button or a wedge member, etc.
  • The main feature of the present invention is that a fixing surface 21 of the fixing jaw 21 and a movable surface 241 of the movable jaw 24 facing to the fixing surface 211 are parallel. A cambered or trapezoidal protrusion 212 is formed at a lower side of the fixing surface 211. A receiving recess 214 is formed at a lower side of the fixing surface 211 for receiving an apex B of a nut. An inclined resisting surface 213 is formed between the recess 214 and the sliding surface 22 for resisting a nut.
  • A cambered or trapezoidal movable protrusion 242 is formed at a lower side of the movable surface 241. The movable surface 241 has a long recess 244 between the protrusion 242 and the movable surface 243 for receiving an apex B 1 of a nut. A line Y is defined from a top end of the fixing surface 211 to the sliding surface 22. A line X is defined to be an axial line of the sliding trench 22. In the present invention, the angelΘ between the line Y and the line X is less than 90 degrees, preferably, between 65° - 85°. More preferably, it is 74°.
  • Referring to Fig. 3 to 5, the movable protrusion 242 can resist a center position of an edge A of a great nut 40, a middle nut 30a and a small nut 30b.
  • Referring to Fig. 6 to 8, a line X2 is vertical to an edge A of a nut as the nut is placed between the two jaws with one side resisting against the fixing jaw 21 and one side resisting against the resisting surface. A line X1 passing one corner B of the nut. When the angle Θ is 74°, the angle Θb between the line X1 and X2 is 16°.
  • Referring to Figs. 6 and 8, in Fig. 7, it is illustrated that the nut is rotated through 16 degrees from the orientation in Fig. 8. The movable protrusion 242 still resists against at a center position of the edge A.
  • In above design, the apexes B, B1 are in the recesses 214, 244, as illustrated in Figs. 3 to 5. Thus the apexes 214, 244 are not in contact with the spanner. Thus the apexes will not be damaged.
  • Advantages of the present invention are that: the apexes of the nut will not round. Thereby for the nut with rounded apex, the spanner of the present invention can drive it well.

Claims (4)

  1. An adjustable spanner comprising:
    a handle (10);
    a receiving groove (23) being longitudinally penetrating through the handle (10);
    an enlarged head (20) at one end of the dandle (10), an upper side of the head (20) being formed with a sliding surface (221), the head (20) having a transversal sliding trench (22) in communication with the receiving groove (23);
    a fixing jaw (21) extending from one end of the head (20), the fixing-jaw (21) having a fixing surface (211);
    a movable jaw (24) installed in the sliding trench (22), the movable jaw (24) having a movable surface (241); and
    a directional control element (25), installed in the receiving groove (23) and engaged with the movable jaw (24);
    a fixing protrusion (212) is formed at the lower side of the fixing surface (21);
    a protrusion (242) is formed at the lower side of the movable surface (24);
    the angle θ between a line Y defined from a top end of the fixing surface (21) to the sliding surface (221) and the sliding surface (221) is between 65°. 85°;
    the fixing surface (211) of the fixing jaw (21) and the movable surface (241) of the movable jaw (24) facing the fixing surface (211) are parallel;
    an inclined resisting surface (213) is formed between the fixing surface (211) and the sliding surface (221) for resisting a nut, a receiving recess (214) being formed at the lower side of the fixing surface (211) between the fixing protrusion (212) and the inclined resisting surface for receiving an apex of a nut
    the movable surface (241) has a long recess (244) between the protrusion (242) and the free end of the movable surface (241) for receiving an apex of a nut;
    the protrusion (242) resists a centre position of an edge of a great nut, a middle nut and a small nut;
    wherein the lower side of the movable surface and of the fixing surface is oriented towards the sliding surface.
  2. Adjustable spanner as claimed in claim 1, wherein the angle θ is 74°.
  3. Adjustable spanner as claimed in claim 1, wherein the protrusion (242) has a cambered or trapezoidal shape.
  4. Adjustable spanner as claimed in claim 1, wherein the fixing protrusion (212) has a cambered or trapezoidal shape.
EP06120848A 2006-09-18 2006-09-18 Adjustable spanner for preventing nut from rounding apex Active EP1918070B1 (en)

Priority Applications (6)

Application Number Priority Date Filing Date Title
PL06120848T PL1918070T3 (en) 2006-09-18 2006-09-18 Adjustable spanner for preventing nut from rounding apex
DK06120848.4T DK1918070T3 (en) 2006-09-18 2006-09-18 Adjustable wrench to prevent nuts from getting rounded tips
EP06120848A EP1918070B1 (en) 2006-09-18 2006-09-18 Adjustable spanner for preventing nut from rounding apex
DE602006018954T DE602006018954D1 (en) 2006-09-18 2006-09-18 Adjustable wrench
AT06120848T ATE491549T1 (en) 2006-09-18 2006-09-18 ADJUSTABLE WRENCH
ES06120848T ES2358122T3 (en) 2006-09-18 2006-09-18 ADJUSTABLE ENGLISH WRENCH TO PREVENT THE VÈRTICES OF A NUT FROM ROUNDING.

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP06120848A EP1918070B1 (en) 2006-09-18 2006-09-18 Adjustable spanner for preventing nut from rounding apex

Publications (2)

Publication Number Publication Date
EP1918070A1 EP1918070A1 (en) 2008-05-07
EP1918070B1 true EP1918070B1 (en) 2010-12-15

Family

ID=37663125

Family Applications (1)

Application Number Title Priority Date Filing Date
EP06120848A Active EP1918070B1 (en) 2006-09-18 2006-09-18 Adjustable spanner for preventing nut from rounding apex

Country Status (6)

Country Link
EP (1) EP1918070B1 (en)
AT (1) ATE491549T1 (en)
DE (1) DE602006018954D1 (en)
DK (1) DK1918070T3 (en)
ES (1) ES2358122T3 (en)
PL (1) PL1918070T3 (en)

Family Cites Families (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1309860A (en) 1919-07-15 kleine
US1692911A (en) 1926-11-01 1928-11-27 Versal V Vaughn Trimming tool
FR1072636A (en) * 1953-01-15 1954-09-14 Forges Stephanoises Sa Des Adjustable wrench
FR77086E (en) * 1960-02-04 1962-01-12 Savarin & Veuve Foinant Adjustments to adjustable wrenches
US3916735A (en) 1973-12-17 1975-11-04 Johnson Paul H Adjustable multiple purpose ratcheting wrench
US4838132A (en) * 1982-03-11 1989-06-13 Donald Pyles Adjustable wrench
US5239899A (en) * 1991-02-15 1993-08-31 Baker David R Wrench with inclined drive faces
US5152198A (en) 1991-11-25 1992-10-06 Schmitz Jr Herman C Snap lock adjustable wrench
US5595098A (en) * 1994-12-21 1997-01-21 Malkin; Rodney Tool having jaws for gripping hexagonally shaped objects
US5878636A (en) 1996-07-25 1999-03-09 David Baker, Inc. Sixty-degree ratchet wrench
US6101906A (en) * 1999-03-31 2000-08-15 Tai; Daniel Adjustable spanner having releasable engagement securing mechanism
TW547249U (en) * 2002-12-31 2003-08-11 Chuan-Fu Wu Fast wrench featuring with bolt or nut stabilization function
DE202004018063U1 (en) * 2004-11-20 2005-01-20 Hsieh, Chih-Ching, Feng-Yuan Adjustable wrench, comprising teeth of at least two different sizes arranged along gripping surfaces

Also Published As

Publication number Publication date
DK1918070T3 (en) 2011-03-28
EP1918070A1 (en) 2008-05-07
DE602006018954D1 (en) 2011-01-27
ATE491549T1 (en) 2011-01-15
PL1918070T3 (en) 2011-05-31
ES2358122T3 (en) 2011-05-05

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