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EP0458771A1 - Clé à douille - Google Patents

Clé à douille Download PDF

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Publication number
EP0458771A1
EP0458771A1 EP91850128A EP91850128A EP0458771A1 EP 0458771 A1 EP0458771 A1 EP 0458771A1 EP 91850128 A EP91850128 A EP 91850128A EP 91850128 A EP91850128 A EP 91850128A EP 0458771 A1 EP0458771 A1 EP 0458771A1
Authority
EP
European Patent Office
Prior art keywords
socket
profile
hexagon
head
tool
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.)
Withdrawn
Application number
EP91850128A
Other languages
German (de)
English (en)
Inventor
John Mercer
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.)
Sandvik AB
Original Assignee
Sandvik AB
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 Sandvik AB filed Critical Sandvik AB
Publication of EP0458771A1 publication Critical patent/EP0458771A1/fr
Withdrawn legal-status Critical Current

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Images

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
    • B25B13/02—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

Definitions

  • This invention relates to tools for tightening and releasing nuts and bolts and other threaded parts that have a polygonal periphery, surfaces of which are intended to be gripped by such tools.
  • a spanner comprising an impact socket head to tighten nuts and bolts, the head having a socket with a cross-section that fits the polygonal periphery of a bold head or nut. Because the tool must be able to be slipped on and off the threaded part easily, it cannot be an exact fit and in practice the driving force of the tool is transmitted through teh lateral edges at the corners of the polygonal periphery of the threaded part.
  • the socket head is made of a material harder than the threaded parts with which it is used.
  • the pressure the tool applies at the corners of the polygonal periphery tends to cause damage to the edges of the threaded part there. This is particularly undesirable in a manufacturing plant where the slightest sign of damage may affect the attractiveness of the product.
  • the use of softer material for the tool to avoid such damage is precluded by the excessive wear of the tool socket that would result.
  • a socket tool for a threaded part that has a generally frusto-conical head or body with a series of tapered axial grooves at invervals around its outer periphery.
  • the tool has a complementary socket, with ribs having slightly less taper than the grooves.
  • the tool transmits torque to the threaded part through the engagement of the ribs in the grooves and the disclosure suggest that the geometry of the engagement can be so arranged that the torque does not produce any force component that would lead to slippage.
  • the walls of the socket have a profile comprising a series of spaced portions projecting inwardly towards a central axis of the socket such that a regular hexagon can be inscribed within the socket profile in a plain perpendicular to said axis with the sides of the hexagon intermediate its corners touching the projections and with said corners spaced from the socket profile, the cross-sectional size of said hexagon in a plane in an intermediate region of the axial length of the socket being no greater than said cross-sectional size at either end of the socket.
  • the configuration of tapered ribs of the socket could be arranged to grip a standard hexagonal profile bolt head or nut body to transmit torque to it.
  • the ribs would make contact only with the peripheral edges of an end face of the non-tapered head or body and if any substantial torque were to be transmitted the screwed part would suffer more damage than in the use of a conventional tool.
  • a socket tool it is possible, moreover, to make the socket walls of a material such as a hard metal without risk of damage to the threaded parts, so that a much longer tool life is obtainable.
  • the hard metal should form at least said projecting portions of the socket profile and conveniently it is provided as an insert fixed within a bore or depression in a main body of the socket, e.g. by brazing or shrink fitting.
  • Figs 1 and 2 illustrate a socket head 2 that can be of generally conventional form externally.
  • the external features will not be described here as they form no part of the present invention. What is significant, however, is that in place of the usual hexagonal recess formed in the bottom face of the socket head, the main body of the illustrated socket has a counterbore 4 in which a hard metal insert 6 is secured.
  • the insert which may be brazed or otherwise fixed against rotation, provides a socket of a form fitting the hexagonal side faces of a threaded part such as the head H of a bolt, but the hexagonal main sides 8 of the socket are themselves profiled so that the bolt head is engaged only in the central regions of its side faces.
  • Each side of the generally hexagonal socket thus has a generally convex form with its central region 10 protruding towards the centre of the socket, while the junctions 12 between adjacent sides are spaced away from corners or the bolt head.
  • the main sides of the socket also have a profile in the axial direction, as in the example illustrated in Fig 3.
  • the generally convex profile 14 illustrated there indicates that the torque is applied by the socket head to the bolt head through a portion intermediate the height of the socket sides 8.
  • the socket head does not have to be truly axial to the bolt while torque is being applied. Use of the tool is thus made easier.
  • the lateral profiling of the socket sides may take a variety of forms and illustrations of some alternatives are shown in Figs 4 and 6.
  • Fig 4 the sloping facets that form the protruding central region 10 on each side of the socket in Fig 2 have been replaced by a central region formed with V-shaped rib 10a.
  • Fig 5 the rib 10b is given a generally semi-circular section.
  • the sharply angled junctions 12 shown in Fig 2 between the sides of the profile have been modified to give blended junctions 12a between adjacent facets.
  • Each of these alternatives may be used with the longitudinal profile shown in Fig 3 and it will be appreciated that the longitudinal profile can itself take a number of different forms.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Details Of Spanners, Wrenches, And Screw Drivers And Accessories (AREA)
EP91850128A 1990-05-25 1991-05-16 Clé à douille Withdrawn EP0458771A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB9011788 1990-05-25
GB909011788A GB9011788D0 (en) 1990-05-25 1990-05-25 Socket tools

Publications (1)

Publication Number Publication Date
EP0458771A1 true EP0458771A1 (fr) 1991-11-27

Family

ID=10676594

Family Applications (1)

Application Number Title Priority Date Filing Date
EP91850128A Withdrawn EP0458771A1 (fr) 1990-05-25 1991-05-16 Clé à douille

Country Status (2)

Country Link
EP (1) EP0458771A1 (fr)
GB (1) GB9011788D0 (fr)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0565919A1 (fr) * 1992-04-17 1993-10-20 Wagner, Paul-Heinz Douille pour un outil de vissage motorisé
EP0747179A1 (fr) * 1995-06-05 1996-12-11 Snap-on Technologies, Inc. Outil douille composite
US6029547A (en) * 1998-01-12 2000-02-29 Snap-Ons Tools Company Composite socket with dual inserts and annular reinforcing member
US6354175B1 (en) 1999-02-08 2002-03-12 Black & Decker Inc. Nutsetter
WO2006130490A1 (fr) * 2005-05-27 2006-12-07 Synthes (U.S.A.) Cle combinee et organe de fixation combine
USD992387S1 (en) 2017-12-13 2023-07-18 Apex Brands, Inc. Extractor socket

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2337368A (en) * 1941-09-19 1943-12-21 Harlow V Greenwood Wrench
US2848916A (en) * 1957-08-09 1958-08-26 Ingersoll Rand Co Feed-through socket
US4126063A (en) * 1975-11-14 1978-11-21 Palmer Richard R Wrench sockets
EP0236630A1 (fr) * 1985-12-18 1987-09-16 Ruzicka, Josef Outil à visser
US4742735A (en) * 1977-11-09 1988-05-10 Vsi Corporation Driver for a lobed collar

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2337368A (en) * 1941-09-19 1943-12-21 Harlow V Greenwood Wrench
US2848916A (en) * 1957-08-09 1958-08-26 Ingersoll Rand Co Feed-through socket
US4126063A (en) * 1975-11-14 1978-11-21 Palmer Richard R Wrench sockets
US4742735A (en) * 1977-11-09 1988-05-10 Vsi Corporation Driver for a lobed collar
EP0236630A1 (fr) * 1985-12-18 1987-09-16 Ruzicka, Josef Outil à visser

Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0565919A1 (fr) * 1992-04-17 1993-10-20 Wagner, Paul-Heinz Douille pour un outil de vissage motorisé
EP0747179A1 (fr) * 1995-06-05 1996-12-11 Snap-on Technologies, Inc. Outil douille composite
US6029547A (en) * 1998-01-12 2000-02-29 Snap-Ons Tools Company Composite socket with dual inserts and annular reinforcing member
US6354175B1 (en) 1999-02-08 2002-03-12 Black & Decker Inc. Nutsetter
WO2006130490A1 (fr) * 2005-05-27 2006-12-07 Synthes (U.S.A.) Cle combinee et organe de fixation combine
US7225710B2 (en) 2005-05-27 2007-06-05 Synthes Gmbh Combination driver and combination fastener
JP2008542044A (ja) * 2005-05-27 2008-11-27 シンセス・ゲゼルシヤフト・ミツト・ベシユレンクテル・ハフツング 六角頭及びローブ頭の締付けシステム用の組合せドライバー及び組合せファスナー
CN101208181B (zh) * 2005-05-27 2012-10-10 斯恩蒂斯有限公司 用于六角和叶形头紧固系统的组合螺丝刀和组合紧固件
USD992387S1 (en) 2017-12-13 2023-07-18 Apex Brands, Inc. Extractor socket
USD1036212S1 (en) 2017-12-13 2024-07-23 Apex Brands, Inc. Extractor socket
USD1036211S1 (en) 2017-12-13 2024-07-23 Apex Brands, Inc. Extractor socket

Also Published As

Publication number Publication date
GB9011788D0 (en) 1990-07-18

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Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

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AK Designated contracting states

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Designated state(s): BE DE ES FR GB IT NL SE

17P Request for examination filed

Effective date: 19920330

STAA Information on the status of an ep patent application or granted ep patent

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17Q First examination report despatched

Effective date: 19930727

18D Application deemed to be withdrawn

Effective date: 19940831