WO2017166794A1 - Adjustable spanner with asymmetric double-splayed jaw and ratchet function - Google Patents

Adjustable spanner with asymmetric double-splayed jaw and ratchet function Download PDF

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Publication number
WO2017166794A1
WO2017166794A1 PCT/CN2016/102972 CN2016102972W WO2017166794A1 WO 2017166794 A1 WO2017166794 A1 WO 2017166794A1 CN 2016102972 W CN2016102972 W CN 2016102972W WO 2017166794 A1 WO2017166794 A1 WO 2017166794A1
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Prior art keywords
jaw
nut
wrench
jaws
ratchet
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PCT/CN2016/102972
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French (fr)
Chinese (zh)
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刘玉林
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刘玉林
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Publication of WO2017166794A1 publication Critical patent/WO2017166794A1/en

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    • BPERFORMING OPERATIONS; TRANSPORTING
    • B25HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
    • B25BTOOLS OR BENCH DEVICES NOT OTHERWISE PROVIDED FOR, FOR FASTENING, CONNECTING, DISENGAGING OR HOLDING
    • B25B13/00Spanners; Wrenches
    • B25B13/10Spanners; Wrenches with adjustable jaws
    • B25B13/12Spanners; Wrenches with adjustable jaws the jaws being slidable
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B25HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
    • B25BTOOLS OR BENCH DEVICES NOT OTHERWISE PROVIDED FOR, FOR FASTENING, CONNECTING, DISENGAGING OR HOLDING
    • B25B13/00Spanners; Wrenches
    • B25B13/46Spanners; Wrenches of the ratchet type, for providing a free return stroke of the handle
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B25HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
    • B25BTOOLS OR BENCH DEVICES NOT OTHERWISE PROVIDED FOR, FOR FASTENING, CONNECTING, DISENGAGING OR HOLDING
    • B25B13/00Spanners; Wrenches
    • B25B13/58Jaw attachments

Definitions

  • the utility model belongs to the technical field of hardware tools, and relates to an adjustable wrench with an asymmetric double-eight-shaped jaw and a ratchet function.
  • the manual common adjustable wrench is a common tool used by people to remove nuts or bolts.
  • the jaw of a common adjustable wrench is linear.
  • the nut or bolt is subjected to two contact faces.
  • the force is large, it is easy to cause yaw and slip, so that the corners of the nut or bolt are easily deformed, and it is difficult or inefficient to disassemble a relatively firm nut or bolt.
  • the symmetrical double V-shaped jaw wrench, its double V-shaped adjustable wrench when the nut or bolt is removed, the nut or bolt becomes four contacts. The surface is stressed and the force is more uniform.
  • ratchet adjustable wrenches When the relatively strong nut or bolt is disassembled, it will not slip, not yaw, and easy to disassemble.
  • the suspended pipe is also disassembled, but the symmetrical double V-shaped jaws are disassembled with nuts, bolts or suspended. In many cases, it is always necessary to adjust the opening nut frequently, which also makes it inefficient.
  • Other types of ratchet adjustable wrenches also have complex structures, high cost, and are not easy to popularize, or the parts of the nut or bolt are far from the front end of the jaws, or the design of the bayonet attachment is limited, and many nuts or bolts cannot be removed, so that the ratchet activities are enabled. The scope of application of the wrench is limited.
  • the utility model provides an adjustable wrench with an asymmetric double-eight-shaped jaw and a ratchet function, which can disassemble the most fastening nut without damaging the corner of the nut, and has a structure. Simple, low cost, and does not damage the corners of the nut.
  • the technical solution adopted by the utility model to solve the technical problem thereof is: an adjustable wrench with an asymmetric double-eight-shaped jaw and a ratchet function, including a wrench body, and a jaw is arranged on the top of the wrench body, and the jaws are provided by the left and right sides.
  • a pair of jaws are formed, and a curved surface of a figure-eight shape is arranged on one side of the two jaws, so that the jaws and the nut form a contact of four faces, and an arc is respectively arranged in the middle of the two opposite arc faces. Shaped grooves to avoid damage to the nut tip.
  • the jaw includes a movable jaw and a fixed jaw, the movable jaw and the fixed jaw have a ratchet structure, and the two jaws enclose a space of a semi-circular shape with a front end parallel rear end to realize the movable wrench to disassemble the nut and the bolt, and the parallel front end The loosening nut is locked, and the large semicircular space at the rear end realizes the positive and negative ratchet functions of the wrench.
  • the jaws are provided with serrations or no serrations, so that the reference distance of the clamping nut can be ensured.
  • the V-shaped groove of the movable jaw is smaller than the V-shaped groove on the fixed jaw.
  • the movable jaw can be moved laterally to change the size of the jaws, and the other fixed jaw can use the ratchet principle to move the nut and the bolt in an oblique direction, thereby realizing the reverse movement of the adjustable wrench and realizing the ratchet function.
  • the utility model has the beneficial effects that the nut has at least four nut plane forces, not the screw
  • the female corner is stressed, the more flat force of the nut is applied, so that the average force of each plane is reduced, and the nut of the same condition is loosened.
  • the nut plane and the wrench are not easily damaged, and it can not damage the corner of the nut.
  • it can disassemble the most rigid nut has the characteristics of simple structure, low cost, no damage to the corner of the nut, etc. It is especially suitable for tightening the nut, no need to worry about the nut that cannot be disassembled, and there is no need to worry about the corner of the nut when the nut is disassembled. It is.
  • Figure 1 is a schematic view of the structure of the present invention.
  • an adjustable wrench having an asymmetric double-eight-shaped jaw and a ratchet 6 function includes a wrench body 1 , and a jaw is arranged on the top of the wrench body 1 , and the jaw is surrounded by two left and right jaws.
  • the two jaws are provided with a figure-shaped arc surface 4 on one side, so that the jaws and the nut form a four-face contact, and a circular arc-shaped groove 5 is respectively arranged in the middle of the two opposite curved faces 4. To avoid damage to the nut tip.
  • the jaws include a movable jaw 2 and a fixed jaw 3, and the movable jaw 2 and the fixed jaw 3 have a ratchet 6 structure, and the two jaws define a semicircular space with a front end parallel to the rear end larger than the nut to achieve the activity.
  • the wrench removes the nut and the bolt, and the outer side of the movable jaw 2, if the tooth 7 is provided, the side has the function of the pipe wrench.
  • the jaws are provided with serrations 7, so that the clamping can be ensured (the nut has a reference distance.)
  • the V-shaped groove 5 of the movable jaw 2 is smaller than the V-shaped groove 5 on the fixed jaw 3.
  • the movable jaw 2 can move in the lateral direction to change the size of the jaws, and the other fixed jaw uses the principle of the ratchet 6 to move the nut and the bolt in an oblique direction, and the rear end of the jaw is slightly smaller than the nut and the bolt.
  • the large space enables the clockwise or counterclockwise movement of the adjustable wrench to realize the function of the positive and negative ratchets 6.
  • the utility model increases the force of the four nut planes, reduces the average force of each nut plane, and has the ratchet function, and changes the common problem that the movable wrench makes the two corners of the nut and the bolt vulnerable to slipping, and can It can remove the most tight nut while damaging the corner of the nut. It has the characteristics of simple structure, low cost and no damage to the corner of the nut. It is especially suitable for tightening the nut. It does not need to worry about the nut that cannot be removed, and it is not necessary to disassemble when removing the nut. The corner of the bad nut is gone.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Details Of Spanners, Wrenches, And Screw Drivers And Accessories (AREA)

Abstract

An adjustable spanner with an asymmetric double-splayed jaw and a ratchet function, comprising a spanner body (1). The top of the spanner body (1) is provided with a jaw formed by a left jaw piece and a right jaw piece. Opposite sides of the two jaw pieces are each provided with a splayed cambered surface (4), so that the jaw pieces are in contact with a nut at four sides. The two opposite cambered surfaces are each provided with an arc-shaped groove (5) in the middle, so as to prevent sharp corners of the nut from being damaged. Thus, at least four surfaces of a nut are under stress, so that the average stress on each surface is reduced; moreover, when a nut fastened under the same condition is detached, the surfaces of the nut and the spanner are not easy to be damaged.

Description

具有不对称双八字形钳口及棘轮功能的活动扳手Adjustable wrench with asymmetrical double splayed jaws and ratchet function 技术领域Technical field
本实用新型属于五金工具技术领域,涉及一种具有不对称双八字形钳口及棘轮功能的活动扳手。The utility model belongs to the technical field of hardware tools, and relates to an adjustable wrench with an asymmetric double-eight-shaped jaw and a ratchet function.
背景技术Background technique
手动的普通活动扳手是平时人们用来拆卸螺母或螺栓的常用工具,普通活动扳手的钳口是直线形的,用普通活动扳手拆卸螺母或螺栓时,螺母或螺栓是两个接触面受力,用力大时易造成偏摆、打滑,使螺母或螺栓的边角易变形,对比较牢固的螺母或螺栓拆卸困难或效率低。拆卸空调管道时,容易偏摆,悬空的管道更不好拆卸,对称的双V形钳口的活动扳手,它的双V形活动扳手在拆卸螺母或螺栓时,螺母或螺栓变成四个接触面受力,受力更均匀,对比较牢固的螺母或螺栓拆卸时不会打滑、不偏摆、易拆卸了,悬空的管道也好拆卸,但是对称双V形钳口拆卸螺母、螺栓或悬空的管道时很多情况下总是要频繁调节开口螺母,也使其效率低。其它类型的棘轮活动扳手也存在结构复杂,成本高,不易普及,或卡螺母或螺栓的部位离钳口的前端校远,或者卡口附件设计受限,很多螺母或螺栓拆卸不了,使棘轮活动扳手应用范围受限制,为此申请人于2015年9月21日申请了一项专利名称为具有不对称双V形钳口及棘轮功能的活动扳手专利号为2015207309251的实用新型专利,但是在实际使用时,遇到特别紧固螺母时都会损伤螺母边角和造成打滑,拆卸不了特别紧固的螺母,而 且还会对螺母边角造成损伤。The manual common adjustable wrench is a common tool used by people to remove nuts or bolts. The jaw of a common adjustable wrench is linear. When a nut or bolt is removed by a common adjustable wrench, the nut or bolt is subjected to two contact faces. When the force is large, it is easy to cause yaw and slip, so that the corners of the nut or bolt are easily deformed, and it is difficult or inefficient to disassemble a relatively firm nut or bolt. When disassembling the air-conditioning duct, it is easy to yaw, the suspended pipeline is more difficult to disassemble, the symmetrical double V-shaped jaw wrench, its double V-shaped adjustable wrench, when the nut or bolt is removed, the nut or bolt becomes four contacts. The surface is stressed and the force is more uniform. When the relatively strong nut or bolt is disassembled, it will not slip, not yaw, and easy to disassemble. The suspended pipe is also disassembled, but the symmetrical double V-shaped jaws are disassembled with nuts, bolts or suspended. In many cases, it is always necessary to adjust the opening nut frequently, which also makes it inefficient. Other types of ratchet adjustable wrenches also have complex structures, high cost, and are not easy to popularize, or the parts of the nut or bolt are far from the front end of the jaws, or the design of the bayonet attachment is limited, and many nuts or bolts cannot be removed, so that the ratchet activities are enabled. The scope of application of the wrench is limited. On September 21, 2015, the applicant applied for a utility model patent with the patent name of 2015207309251 with the asymmetric double V-shaped jaw and ratchet function, but in practice When used, when the special tightening nut is encountered, the corners of the nut will be damaged and the slip will be caused, and the specially tightened nut can not be removed. It also causes damage to the corners of the nut.
实用新型内容Utility model content
为了克服现有技术的上述缺点,本实用新型提供一种具有不对称双八字形钳口及棘轮功能的活动扳手,它能够在不损坏螺母边角的同时能够拆卸最紧固的螺母,具有结构简单、成本低、不损螺母边角等特点。本实用新型解决其技术问题所采用的技术方案是:一种具有不对称双八字形钳口及棘轮功能的活动扳手,包括扳手本体,在扳手本体的顶部设置有钳口,钳口由左右两个钳嘴围成,在两个钳嘴相向一侧均设置呈八字形的弧面,从而使钳嘴与螺母形成四个面的接触,在两个相向的弧面中间分别设置有一个圆弧形的凹槽,从而避免损伤螺母尖角。In order to overcome the above disadvantages of the prior art, the utility model provides an adjustable wrench with an asymmetric double-eight-shaped jaw and a ratchet function, which can disassemble the most fastening nut without damaging the corner of the nut, and has a structure. Simple, low cost, and does not damage the corners of the nut. The technical solution adopted by the utility model to solve the technical problem thereof is: an adjustable wrench with an asymmetric double-eight-shaped jaw and a ratchet function, including a wrench body, and a jaw is arranged on the top of the wrench body, and the jaws are provided by the left and right sides. A pair of jaws are formed, and a curved surface of a figure-eight shape is arranged on one side of the two jaws, so that the jaws and the nut form a contact of four faces, and an arc is respectively arranged in the middle of the two opposite arc faces. Shaped grooves to avoid damage to the nut tip.
所述钳嘴包括活动钳嘴和固定钳嘴,活动钳嘴和固定钳嘴具有棘轮结构,两个钳嘴围成前端平行后端大半圆形的空间从而实现活动扳手拆卸螺母、螺栓,平行前端卡住松动螺母转动,后端大半圆形的空间实现扳手的正、反棘轮功能。The jaw includes a movable jaw and a fixed jaw, the movable jaw and the fixed jaw have a ratchet structure, and the two jaws enclose a space of a semi-circular shape with a front end parallel rear end to realize the movable wrench to disassemble the nut and the bolt, and the parallel front end The loosening nut is locked, and the large semicircular space at the rear end realizes the positive and negative ratchet functions of the wrench.
所述钳口上设有纹齿也可不设纹齿,从而能够保证夹持螺母有参照距离。The jaws are provided with serrations or no serrations, so that the reference distance of the clamping nut can be ensured.
所述活动钳嘴的V形凹槽小于固定钳嘴上的V形凹槽。The V-shaped groove of the movable jaw is smaller than the V-shaped groove on the fixed jaw.
所述活动钳嘴能够在横向移动,从而改变钳口大小,另一个固定的钳嘴利用棘轮原理,能够使螺母、螺栓在斜上方向移动,从而实现活动扳手的倒退运动,实现棘轮功能。The movable jaw can be moved laterally to change the size of the jaws, and the other fixed jaw can use the ratchet principle to move the nut and the bolt in an oblique direction, thereby realizing the reverse movement of the adjustable wrench and realizing the ratchet function.
本实用新型的有益效果是:使螺母最少有四个螺母平面受力,不是螺 母边角受力,螺母更多的平面受力,使每个平面的平均受力减少,而拆卸同样条件紧固的螺母其螺母平面和扳手都不易损坏,它能够在不损坏螺母边角的同时能够拆卸最紧固的螺母,具有结构简单、成本低、不损螺母边角等特点,特别适用于紧固螺母,不用担心拆卸不了的螺母,也不用担心拆卸螺母时拆坏螺母的边角了。The utility model has the beneficial effects that the nut has at least four nut plane forces, not the screw The female corner is stressed, the more flat force of the nut is applied, so that the average force of each plane is reduced, and the nut of the same condition is loosened. The nut plane and the wrench are not easily damaged, and it can not damage the corner of the nut. At the same time, it can disassemble the most rigid nut, has the characteristics of simple structure, low cost, no damage to the corner of the nut, etc. It is especially suitable for tightening the nut, no need to worry about the nut that cannot be disassembled, and there is no need to worry about the corner of the nut when the nut is disassembled. It is.
附图说明DRAWINGS
图1是本实用新型结构示意图。Figure 1 is a schematic view of the structure of the present invention.
图中:1-扳手本体,2-活动钳嘴,3-固定钳嘴,4-弧面,5-凹槽,6-棘轮,7-纹齿。In the figure: 1-wrench body, 2-moving jaws, 3-fixing jaws, 4-arc surface, 5-groove, 6-ratchet, 7-tooth.
具体实施方式detailed description
下面结合附图和实施例对本实用新型进一步说明。The present invention will be further described below in conjunction with the accompanying drawings and embodiments.
参见图1,一种具有不对称双八字形钳口及棘轮6功能的活动扳手,包括扳手本体1,在扳手本体1的顶部设置有钳口,钳口由左右两个钳嘴围成,在两个钳嘴相向一侧均设置呈八字形的弧面4,从而使钳嘴与螺母形成四个面的接触,在两个相向的弧面4中间分别设置有一个圆弧形的凹槽5,从而避免损伤螺母尖角。Referring to FIG. 1 , an adjustable wrench having an asymmetric double-eight-shaped jaw and a ratchet 6 function includes a wrench body 1 , and a jaw is arranged on the top of the wrench body 1 , and the jaw is surrounded by two left and right jaws. The two jaws are provided with a figure-shaped arc surface 4 on one side, so that the jaws and the nut form a four-face contact, and a circular arc-shaped groove 5 is respectively arranged in the middle of the two opposite curved faces 4. To avoid damage to the nut tip.
所述钳嘴包括活动钳嘴2和固定钳嘴3,活动钳嘴2和固定钳嘴3具有棘轮6结构,两个钳嘴围成前端平行后端比螺母大的半圆形空间从而实现活动扳手拆卸螺母、螺栓,活动钳嘴2的外边,如果设有纹齿7,侧具有管钳的功能。The jaws include a movable jaw 2 and a fixed jaw 3, and the movable jaw 2 and the fixed jaw 3 have a ratchet 6 structure, and the two jaws define a semicircular space with a front end parallel to the rear end larger than the nut to achieve the activity. The wrench removes the nut and the bolt, and the outer side of the movable jaw 2, if the tooth 7 is provided, the side has the function of the pipe wrench.
所述钳口上设有纹齿7,从而能够保证夹持(螺母有参照距离。)The jaws are provided with serrations 7, so that the clamping can be ensured (the nut has a reference distance.)
所述活动钳嘴2的V形凹槽5小于固定钳嘴3上的V形凹槽5。 The V-shaped groove 5 of the movable jaw 2 is smaller than the V-shaped groove 5 on the fixed jaw 3.
所述活动钳嘴2能够在横向移动,从而改变钳口大小,另一个固定的钳嘴利用棘轮6原理,能够使螺母、螺栓在斜上方向移动,落入钳口后端比螺母、螺栓稍大的空间,从而实现活动扳手的正时针、或反时针运动,实现正、反棘轮6功能。(使用时首先调节活动钳嘴2,用其后端把螺母卡住,此时只有拆卸最紧固螺母功能,拆卸松螺母后,再调节活动钳嘴2,使其两个钳嘴前端轻松卡住螺母,就可以利用两个钳嘴围成的后端比螺母稍大的空间实现棘轮功能。The movable jaw 2 can move in the lateral direction to change the size of the jaws, and the other fixed jaw uses the principle of the ratchet 6 to move the nut and the bolt in an oblique direction, and the rear end of the jaw is slightly smaller than the nut and the bolt. The large space enables the clockwise or counterclockwise movement of the adjustable wrench to realize the function of the positive and negative ratchets 6. (In use, first adjust the movable jaw 2, and use the rear end to clamp the nut. At this time, only the function of the most tightening nut is removed. After the loose nut is removed, the movable jaw 2 is adjusted to make the front end of the two jaws easy. By holding the nut, the ratchet function can be realized by using a space where the rear end of the two jaws is slightly larger than the nut.
本实用新型通过增加四个螺母平面受力,减少每个螺母平面的平均受力,兼顾还有棘轮功能,改变了活动扳手使螺母、螺栓二个边角受力易打滑的通病,能够在不损坏螺母边角的同时能够拆卸最紧固的螺母,具有结构简单、成本低、不损螺母边角等特点,特别适用于紧固螺母,不用担心拆卸不了的螺母,也不用担心拆卸螺母时拆坏螺母的边角了。 The utility model increases the force of the four nut planes, reduces the average force of each nut plane, and has the ratchet function, and changes the common problem that the movable wrench makes the two corners of the nut and the bolt vulnerable to slipping, and can It can remove the most tight nut while damaging the corner of the nut. It has the characteristics of simple structure, low cost and no damage to the corner of the nut. It is especially suitable for tightening the nut. It does not need to worry about the nut that cannot be removed, and it is not necessary to disassemble when removing the nut. The corner of the bad nut is gone.

Claims (5)

  1. 一种具有不对称双八字形钳口及棘轮功能的活动扳手,包括扳手本体,其特征是:在扳手本体的顶部设置有钳口,钳口由左右两个钳嘴围成,在两个钳嘴相向一侧均设置呈八字形的弧面,从而使钳嘴与螺母形成四个面的接触,在两个相向的弧面中间分别设置有一个圆弧形的凹槽,从而避免损伤螺母尖角。An adjustable wrench with an asymmetric double-eight-shaped jaw and a ratchet function, comprising a wrench body, characterized in that: a jaw is arranged on the top of the wrench body, and the jaw is surrounded by two left and right jaws, in two jaws The sides of the mouth are provided with a figure-shaped arc surface on one side, so that the jaws and the nut form a four-face contact, and a circular arc-shaped groove is respectively arranged in the middle of the two opposite arc faces, thereby avoiding damage to the nut tip. angle.
  2. 如权利要求1所述具有不对称双八字形钳口及棘轮功能的活动扳手,其特征是:所述钳嘴包括活动钳嘴和固定钳嘴,活动钳嘴和固定钳嘴具有棘轮结构,两个钳嘴围成前端平行后端大半圆形的空间从而实现活动扳手拆卸螺母、螺栓,平行前端卡住松动螺母转动,后端大半圆形的空间实现扳手的正、反棘轮功能。The adjustable wrench with asymmetric double-eight-shaped jaw and ratchet function according to claim 1, wherein the jaw comprises a movable jaw and a fixed jaw, the movable jaw and the fixed jaw have a ratchet structure, and two The jaws are surrounded by a semi-circular space with parallel front ends and rear ends to realize the removal of nuts and bolts by the movable wrench. The parallel front ends are locked by the loose nut rotation, and the large semicircular space at the rear end realizes the positive and negative ratchet functions of the wrench.
  3. 如权利要求1所述具有不对称双八字形钳口及棘轮功能的活动扳手,其特征是:所述钳口上设有纹齿也可不设纹齿,从而能够保证夹持螺母有参照距离。The adjustable wrench with asymmetric double-eight-shaped jaws and a ratchet function according to claim 1, wherein the jaws are provided with or without serrations, thereby ensuring a reference distance of the clamping nut.
  4. 如权利要求1所述具有不对称双八字形钳口及棘轮功能的活动扳手,其特征是:所述活动钳嘴的V形凹槽小于固定钳嘴上的V形凹槽。The adjustable wrench with asymmetric double-eight-shaped jaw and ratchet function according to claim 1, wherein the V-shaped groove of the movable jaw is smaller than the V-shaped groove on the fixed jaw.
  5. 如权利要求1所述具有不对称双八字形钳口及棘轮功能的活动扳手,其特征是:所述活动钳嘴能够在横向移动,从而改变钳口大小,另一个固定的钳嘴利用棘轮原理,能够使螺母、螺栓在斜上方向移动,从而实现活动扳手的倒退运动,实现棘轮功能。 The adjustable wrench with asymmetric double-eight-shaped jaw and ratchet function according to claim 1, wherein the movable jaw can move laterally to change the size of the jaw, and the other fixed jaw uses the ratchet principle. The nut and the bolt can be moved in the oblique direction, thereby realizing the reverse movement of the movable wrench and realizing the ratchet function.
PCT/CN2016/102972 2016-04-01 2016-10-22 Adjustable spanner with asymmetric double-splayed jaw and ratchet function WO2017166794A1 (en)

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CN201620265442.3 2016-04-01

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN205630430U (en) * 2016-04-01 2016-10-12 刘玉林 Adjustable spanner with asymmetric two splayed is kept silent and ratchet function

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CA2075566A1 (en) * 1991-11-07 1993-05-08 Richard J. Macor Surface conforming, torque enhancing wrench
DE19747536A1 (en) * 1997-10-28 1999-05-06 Gernot Hirse Open-ended wrench
CN2328480Y (en) * 1998-01-21 1999-07-14 李玉贤 Tangent type spanners
CN2743086Y (en) * 2004-09-13 2005-11-30 徐尚仁 Special spanner for external periphery taper well antitheft screw
CN201115940Y (en) * 2007-11-19 2008-09-17 冯俊杰 Multifunctional slide-proof adjustable wrench
CN203680169U (en) * 2014-02-18 2014-07-02 李天勇 Movable cushion block spanner
CN205630430U (en) * 2016-04-01 2016-10-12 刘玉林 Adjustable spanner with asymmetric two splayed is kept silent and ratchet function

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CA2075566A1 (en) * 1991-11-07 1993-05-08 Richard J. Macor Surface conforming, torque enhancing wrench
DE19747536A1 (en) * 1997-10-28 1999-05-06 Gernot Hirse Open-ended wrench
CN2328480Y (en) * 1998-01-21 1999-07-14 李玉贤 Tangent type spanners
CN2743086Y (en) * 2004-09-13 2005-11-30 徐尚仁 Special spanner for external periphery taper well antitheft screw
CN201115940Y (en) * 2007-11-19 2008-09-17 冯俊杰 Multifunctional slide-proof adjustable wrench
CN203680169U (en) * 2014-02-18 2014-07-02 李天勇 Movable cushion block spanner
CN205630430U (en) * 2016-04-01 2016-10-12 刘玉林 Adjustable spanner with asymmetric two splayed is kept silent and ratchet function

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