WO2011116474A1 - Cliquet pour retrait d'organes de fixation endommagés - Google Patents

Cliquet pour retrait d'organes de fixation endommagés Download PDF

Info

Publication number
WO2011116474A1
WO2011116474A1 PCT/CA2011/000314 CA2011000314W WO2011116474A1 WO 2011116474 A1 WO2011116474 A1 WO 2011116474A1 CA 2011000314 W CA2011000314 W CA 2011000314W WO 2011116474 A1 WO2011116474 A1 WO 2011116474A1
Authority
WO
WIPO (PCT)
Prior art keywords
wrench
fastener
extraction head
differently sized
receiving areas
Prior art date
Application number
PCT/CA2011/000314
Other languages
English (en)
Inventor
Johnny Yiu Wah Yip
David Can Guang Deng
Original Assignee
Suretorq Inc.
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 Suretorq Inc. filed Critical Suretorq Inc.
Publication of WO2011116474A1 publication Critical patent/WO2011116474A1/fr

Links

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
    • B25B27/00—Hand tools, specially adapted for fitting together or separating parts or objects whether or not involving some deformation, not otherwise provided for
    • B25B27/14—Hand tools, specially adapted for fitting together or separating parts or objects whether or not involving some deformation, not otherwise provided for for assembling objects other than by press fit or detaching same
    • B25B27/18—Hand tools, specially adapted for fitting together or separating parts or objects whether or not involving some deformation, not otherwise provided for for assembling objects other than by press fit or detaching same withdrawing broken threaded parts or twist drills
    • 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
    • B25B13/02—Spanners; Wrenches with rigid jaws
    • B25B13/06—Spanners; Wrenches with rigid jaws of socket type
    • 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
    • B25B13/02—Spanners; Wrenches with rigid jaws
    • B25B13/06—Spanners; Wrenches with rigid jaws of socket type
    • B25B13/065—Spanners; Wrenches with rigid jaws of socket type characterised by the cross-section of the socket
    • 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
    • B25B13/461—Spanners; Wrenches of the ratchet type, for providing a free return stroke of the handle with concentric driving and driven member
    • B25B13/462—Spanners; Wrenches of the ratchet type, for providing a free return stroke of the handle with concentric driving and driven member the ratchet parts engaging in a direction radial to the tool operating axis
    • B25B13/463—Spanners; Wrenches of the ratchet type, for providing a free return stroke of the handle with concentric driving and driven member the ratchet parts engaging in a direction radial to the tool operating axis a pawl engaging an externally toothed wheel

Definitions

  • the present invention relates to the removal of threaded fasteners.
  • the invention relates to the removal of fasteners having flat faces for applying torque, where the surfaces have been rounded off or otherwise damaged through corrosion or wear.
  • Threaded fasteners that have an arrangement of faces for applying torque to the fastener may become worn or damaged through use. When this occurs, the tools designed to rotate a threaded fastener can no longer securely grip the fastener to apply the torque. A conventional tool slips over the rounded or damaged corners and does not succeed in rotating the fastener.
  • a selection of extraction tools designed to remove such damaged fasteners exist in the prior art. These tools generally use a plurality of teeth to engage the fastener. Such “teeth” may be in the form of a plurality of splines (CA 2391276) or grooves (e.g. US 6598498) that bite into the faces of the fastener so as to grip it securely. When the teeth are made up of a selection of faces, constant use of the tool may result in the buildup of fastener bits between them, as well as the dulling of the "biting" edge. Curved arcuate grooves are known in the prior art (e.g. US 6598498) but as edges of a fairly small area continue to perform the work, are still susceptible to dulling with time.
  • Threaded fasteners come in a variety of shapes and sizes. A large set of wrenches may be required for the removal of different kinds of fasteners, which is inconvenient and expensive.
  • the object of the present invention to overcome the above disadvantages by having the capacity to remove four different sizes and shapes of fasteners while retaining the ability to fit into smaller areas. Additionally, the helical ridges may be angled in a counter-clockwise direction to assist in the fastener removal process which may extend the life of the tool.
  • the invention is directed to a ratcheted wrench for removing threaded fasteners having a first end and a second end and a handle extending between the first and second ends, comprising:
  • a second double-sided fastener extraction head at the second end with differently sized receiving areas to accommodate differently sized fastener heads; a pair of reversible ratchets, one at each of the first and second ends, independently permitting each of the first and second extraction heads to selectively engage the wrench handle or rotate freely relative to the wrench handle when rotated in a first direction about an axis of rotation of either the first or the second extraction head.
  • each of the receiving areas comprises a plurality of helical ridges that twist relative to the axis of rotation, and optionally, intersecting faces of each of the helical ridges meet at an angle greater than 90°.
  • the invention is further directed to the wrench described above, wherein all helical ridges in each of the receiving areas twist relative to the axis of rotation of the most proximate extraction head in a first direction.
  • the invention is further directed to the wrench described above, wherein each of the differently sized receiving areas are differently sized from all of the others, such that the wrench can accommodate four differently sized fastener heads.
  • the helical ridges in the receiving areas of the first extraction head twist relative to the axis of rotation of the first extraction head in a first direction
  • the helical ridges in the receiving areas of the second extraction head twist relative to the axis of rotation of the second extraction head in a second direction.
  • a first receiving area on the first extraction head and a first receiving area on the second extraction head are both sized to accommodate a first fastener head
  • a second receiving area on the first extraction head and a second receiving area on the second extraction head are both sized to accommodate a second fastener head, such that the wrench can accommodate two differently sized fastener heads that can be rotated in both the first and second direction.
  • Fig. 1 illustrates a top view of the invention, displaying the wrench shape, the workings of the reversible ratchet mechanism and the fastener extraction mechanism.
  • Fig. 2a illustrates a side view of the invention, displaying the four differently sized fastener extraction mechanisms as well as the reversible ratchet mechanism.
  • Fig. 2b illustrates a side view of the invention, displaying the two differently sized fastener extraction mechanisms, each of which rotates in both directions, as well as the reversible ratchet mechanism.
  • Fig. 3 is an exploded perspective view of the embodiment of a head of the wrench, focusing on the reversible ratchet mechanism.
  • Fig. 4 is a detailed close up of the top of the head of the wrench, with Figs. 4a and 4b illustrating the way in which the pawl's position and thus the direction of the ratchet may be switched.
  • Fig. 5 is a detailed close up of the pawl used with the ratchet.
  • Fig. 6 is a section view of the extraction head of the invention, demonstrating the angled circular arcs used to remove the damaged fastener.
  • Fig. 7 is a perspective view of the fastener extraction head, demonstrating the angled circular arcs used to remove the damaged fastener.
  • Fig. 8 is a perspective view of the extraction head and the extraction head cover.
  • the present invention consists of a wrench with a ratchet mechanism for the purpose of removing threaded fasteners that have been damaged.
  • the wrench is double sided and reversible, and has four differently sized and shaped apertures so as to accommodate four different sizes and shapes of damaged fasteners.
  • Each end of the wrench has a toothed gear wheel inside, the centre of which is cut so as to serve as a fastener extraction head having two receiving areas.
  • each receiving area is defined by six circular arcuate cuts or bores which are angled counter-clockwise as the cuts progress into the aperture. The intersections of the arcuate cuts form sharp ridges which dig into a damaged fastener so as to engage it, to apply torque to the fastener to remove it or rotate it.
  • the fastener extracting wrench has a handle with double sided fastener extracting heads 17 and 28 on each end.
  • the wrench is preferably made out of carbon or stainless steel, but any other material of comparable hardness and strength may be used as well.
  • Handle 1 is found in the centre of the wrench.
  • the ends of the wrench may have two apertures 13 and 14 passing through the ends of each fastener extraction head (17 and 28).
  • the fastener extracting heads 17 and 28 defining these two apertures contain four different sizes and shapes of receiving areas .
  • Figure 2a clearly depicts the four different sizes and shapes of receiving areas 6, 15, 10, and 16. The wrench can thus extract four different sizes of damaged fasteners.
  • FIG. 2b Another embodiment of the present invention is shown in Figure 2b.
  • the wrench in this embodiment can both tighten and loosen fasteners of two different sizes.
  • the ends of the wrench have two double sided fastener extracting mechanisms 17 and 28 having two apertures 13 and 14 which contain two different sizes of receiving areas: 33 and 34 at one size, twisted in opposite directions, and 35 and 36 at a second size, twisted in opposite directions.
  • the wrench can thus extract or tighten two different sizes of damaged fasteners.
  • the reversible nature of the wrench allows the tool to be used to tighten damaged fasteners or to remove fasteners with threads that are spun in the opposite direction.
  • FIGS 3, 4, 4a and 4b demonstrate the workings of the ratchet mechanism.
  • Aperture 13 includes two compartments 18 and 19 as well as cavity 20. Compartment 18 is indented from the top to create ledge 21.
  • the fastener extraction head having a gear wheel 11 mounted in compartment 18 in such a way that the fastener extraction head is free to rotate.
  • a ring of teeth 22
  • one piece ring faceplate 27 may be provided.
  • the first opening 28 is configured to the size and shape of compartment 18, and the rounded tail 29 aligns with
  • Figure 8 demonstrates how faceplate 27 is secured. Faceplate 27 is pushed into compartments 18 and 19. Within a recess in the head of the wrench, is placed an engagement means 32, which is biased such that when cover 27 is positioned into the compartment 18, the engagement means expand to partially fit within a corresponding recess 37 in faceplate 27.
  • Pawl 2 is mounted in compartment 19.
  • Figure 5 shows the shape of pawl 2 in detail.
  • Pawl 2 has two sets of two triangle teeth 23 and 24, which engage with gear wheel 11's ring of teeth 22 as shown in Figures 4, 4a and 4b.
  • Pawl 2 also has two arcuate indentations 25 and 26 which allow for reversing the ratchet's direction, with the aid of ball 4 and spring 5.
  • Ball 4 is preferably made of steel but can be made of other metals as well. Ball 4 fits into arcuate
  • any one of the receiving areas 6, 10, 15, or 16, as shown in Figure 2a may be positioned over the fastener to be extracted.
  • the ratcheting mechanism works as follows. When a fastener is to be extracted by the tool, gear wheel 11 must be locked in position by pawl 2 when handle 1 is being turned in the direction that loosens the engaged fastener. When handle 1 is turned in the opposite direction, gear wheel 11 spins through and torque is no longer applied to the fastener. Considering fastener conventions, the fastener would generally be extracted when the receiving area in question is turning in a counter-clockwise direction. Pawl 2 should be positioned so as to ensure that this occurs - the receiving area must be locked when handle 1 is rotated in a counter-clockwise direction, thus removing the fastener.
  • Figures 4a and 4b demonstrate the two different positions of pawl 2.
  • receiving area 16 is placed over the fastener and handle 1 is rotated counter-clockwise. While such rotation is occurring, gear wheel 11 is locked and does not spin, due to the position of pawl 2: pawl 2's teeth are locked with the teeth of gear wheel 10. Torque is therefore applied to the fastener, and removal occurs.
  • gear wheel 11 spins through, torque is not applied to the fastener, and handle 1 is brought back down to starting position.
  • Each of receiving areas 6, 16, 10, and 15 are cut into the centres of gear wheels 11 and 31.
  • the receiving areas are cut in such a way so as to facilitate the removal of damaged or rounded fasteners.
  • each of receiving areas 6, 16, 10, and 15 are cut into a number of arcs angled counter-clockwise.
  • Figures 6 and 7 show receiving areas 6 and 15 cut into 6 such arcs (to match a 6 sided fastener).
  • the intersections of the arcs cut into the fastener's flat faces and force the fastener to turn when torque is applied to the handle 1 of the wrench.
  • the counter-clockwise angle of the arcs aids in facilitating the removal of the fasteners.
  • the number and angle of arcs is variable, depending on the type of fastener that needs to be removed, and each of receiving areas 6, 16, 10, and 15 may be cut and sized differently so as to accommodate 4 different sizes and shapes of fasteners.

Landscapes

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

Abstract

L'invention se rapporte à une clé à cliquets destinée à retirer des organes de fixation filetés comportant deux extrémités et un manche s'étendant entre elles, et deux têtes d'extraction d'organe de fixation à deux côtés, une à chaque extrémité, chaque tête d'extraction d'organe de fixation étant entraînée par un cliquet réversible, la clé possédant au moins deux et jusqu'à quatre zones de réception de taille différente destinées à accueillir des têtes d'organe de fixation de taille différente, le mouvement à cliquets permettant à l'utilisateur de la clé de passer facilement à une zone de réception de taille différente grâce au retournement de la clé et au changement de la direction de cliquet, ou grâce à l'utilisation de l'autre extrémité de la clé.
PCT/CA2011/000314 2010-03-25 2011-03-25 Cliquet pour retrait d'organes de fixation endommagés WO2011116474A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CA2,697,755 2010-03-25
CA2697755A CA2697755C (fr) 2010-03-25 2010-03-25 Cle a cliquet permettant d'enlever des fixations endommagees

Publications (1)

Publication Number Publication Date
WO2011116474A1 true WO2011116474A1 (fr) 2011-09-29

Family

ID=44672413

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/CA2011/000314 WO2011116474A1 (fr) 2010-03-25 2011-03-25 Cliquet pour retrait d'organes de fixation endommagés

Country Status (2)

Country Link
CA (1) CA2697755C (fr)
WO (1) WO2011116474A1 (fr)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2526937A (en) * 2014-05-21 2015-12-09 Snap On Tools Corp Fastener removal socket
TWI702123B (zh) * 2019-07-26 2020-08-21 國立勤益科技大學 六面模組化螺合件內嵌式多用途工具組
CN112171222A (zh) * 2020-09-25 2021-01-05 长沙杰立特自动化设备有限公司 整流子自动装配装置
USD992387S1 (en) 2017-12-13 2023-07-18 Apex Brands, Inc. Extractor socket

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3161090A (en) * 1962-10-17 1964-12-15 Silas B Mclellan Stud engaging wrench having a fluted gripping surface
US6729208B1 (en) * 2002-10-29 2004-05-04 Aj Manufacturing Co., Inc. Tool for removing fasteners
EP1669164A1 (fr) * 2004-12-08 2006-06-14 Irwin Industrial Tool Company Clé a cliquet d'extraction d'éléments de fixation a têtes endommagées

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3161090A (en) * 1962-10-17 1964-12-15 Silas B Mclellan Stud engaging wrench having a fluted gripping surface
US6729208B1 (en) * 2002-10-29 2004-05-04 Aj Manufacturing Co., Inc. Tool for removing fasteners
EP1669164A1 (fr) * 2004-12-08 2006-06-14 Irwin Industrial Tool Company Clé a cliquet d'extraction d'éléments de fixation a têtes endommagées

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
MASTERCRAFT: "Ratcheting Boit and Nut Removers", PN# 058-2500-2, SKU# 7-78655122-5, May 2010 (2010-05-01) *

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2526937A (en) * 2014-05-21 2015-12-09 Snap On Tools Corp Fastener removal socket
GB2526937B (en) * 2014-05-21 2016-09-28 Snap On Incorporated Fastener removal socket
US9937607B2 (en) 2014-05-21 2018-04-10 Snap-On Incorporated Fastener removal socket
USD992387S1 (en) 2017-12-13 2023-07-18 Apex Brands, Inc. Extractor socket
TWI702123B (zh) * 2019-07-26 2020-08-21 國立勤益科技大學 六面模組化螺合件內嵌式多用途工具組
CN112171222A (zh) * 2020-09-25 2021-01-05 长沙杰立特自动化设备有限公司 整流子自动装配装置

Also Published As

Publication number Publication date
CA2697755C (fr) 2017-03-07
CA2697755A1 (fr) 2011-09-25

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