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GB2327107A - Torque limiting threaded fastener - Google Patents

Torque limiting threaded fastener Download PDF

Info

Publication number
GB2327107A
GB2327107A GB9714136A GB9714136A GB2327107A GB 2327107 A GB2327107 A GB 2327107A GB 9714136 A GB9714136 A GB 9714136A GB 9714136 A GB9714136 A GB 9714136A GB 2327107 A GB2327107 A GB 2327107A
Authority
GB
United Kingdom
Prior art keywords
fastener
tool
tool engaging
torque
tighten
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Withdrawn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
GB9714136A
Other versions
GB9714136D0 (en
Inventor
Douglas John Gibbons
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.)
QED Intellectual Property Ltd
Original Assignee
QED Intellectual Property 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 QED Intellectual Property Ltd filed Critical QED Intellectual Property Ltd
Priority to GB9714136A priority Critical patent/GB2327107A/en
Publication of GB9714136D0 publication Critical patent/GB9714136D0/en
Priority to PCT/GB1998/001983 priority patent/WO1999002870A1/en
Priority to AU82315/98A priority patent/AU8231598A/en
Publication of GB2327107A publication Critical patent/GB2327107A/en
Withdrawn legal-status Critical Current

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16B—DEVICES FOR FASTENING OR SECURING CONSTRUCTIONAL ELEMENTS OR MACHINE PARTS TOGETHER, e.g. NAILS, BOLTS, CIRCLIPS, CLAMPS, CLIPS OR WEDGES; JOINTS OR JOINTING
    • F16B31/00—Screwed connections specially modified in view of tensile load; Break-bolts
    • F16B31/02—Screwed connections specially modified in view of tensile load; Break-bolts for indicating the attainment of a particular tensile load or limiting tensile load

Landscapes

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

Abstract

The fastener has tool engaging surfaces 2 which a tool may engage to tighten the fastener, each surface lying in a plane parallel with the fastener axis, and having a slot 3 in it to render the adjacent tool engaging surface 2 elastically deformable, in order to limit the maximum torque a tightening tool may apply to the fastener. Greater torque can be applied in the unfastening direction.

Description

Torque Limiting Threaded Fastener This invention relates to a torque regulating fastening.
Screw-threaded fasteners are the most common type of fastener in many engineering applications. The correct torque should be applied between the two sections of the fastener to ensure the integrity of the fastening.
The applied torque is traditionally regulated by the use of a torque wrench. This method is prone to human error, or misuse, leading to incorrect loading of the joints.
According to the present invention there is provided a threaded fastener, the thread of the fastener defining an axis about which the fastener may be rotated relative to a matching thread in order to tighten the fastener, comprising a plurality of adjacent tool engaging surfaces which a tool may engage to tighten the fastener, each surface lying generally in a plane parallel with the fastener axis, characterised in that one or more surfaces has a slot therein, the slot in one tool engaging surface defining a wall with an adjacent tool engaging surface, said wall being elastically deformable in order to limit the maximum torque a tightening tool may apply to the fastener.
A specific embodiment of the invention will now be described by way of an example with reference to the accompanying drawing in which; Figure 1 shows in perspective, a nut, with an inner threaded surface 1 with the deformable tool engaging surfaces 2, and slots 3. The nut has a right-hand thread, so the slots are positioned to allow greater torque to be applied in the anti-clockwise direction, as greater torque is often necessary to dismantle such fasteners.

Claims (1)

  1. Claims
    1)A threaded fastener, the thread of the fastener defining an axis about which the fastener may be rotated relative to a matching thread in order to tighten the fastener, comprising a plurality of adjacent tool engaging surfaces which a tool may engage to tighten the fastener, each surface lying generally in a plane parallel with the fastener axis, characterised in that one or more surfaces has a slot therein, the slot in one tool engaging surface defining a wall with an adjacent tool engaging surface, said wall being elastically deformable in order to limit the maximum torque a tightening tool may apply to the fastener.
    2)A fastener substantially as described herein with reference to Fig. 1 of the accompanying drawing.
GB9714136A 1997-07-07 1997-07-07 Torque limiting threaded fastener Withdrawn GB2327107A (en)

Priority Applications (3)

Application Number Priority Date Filing Date Title
GB9714136A GB2327107A (en) 1997-07-07 1997-07-07 Torque limiting threaded fastener
PCT/GB1998/001983 WO1999002870A1 (en) 1997-07-07 1998-07-06 Torque limiting device
AU82315/98A AU8231598A (en) 1997-07-07 1998-07-06 Torque limiting device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB9714136A GB2327107A (en) 1997-07-07 1997-07-07 Torque limiting threaded fastener

Publications (2)

Publication Number Publication Date
GB9714136D0 GB9714136D0 (en) 1997-09-10
GB2327107A true GB2327107A (en) 1999-01-13

Family

ID=10815376

Family Applications (1)

Application Number Title Priority Date Filing Date
GB9714136A Withdrawn GB2327107A (en) 1997-07-07 1997-07-07 Torque limiting threaded fastener

Country Status (3)

Country Link
AU (1) AU8231598A (en)
GB (1) GB2327107A (en)
WO (1) WO1999002870A1 (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2004042241A1 (en) * 2002-11-08 2004-05-21 Uponor Innovation Ab Connecting piece comprising a gripping element on the outer surface for rotating the connecting piece
WO2015185411A1 (en) * 2014-06-06 2015-12-10 Voss Automotive Gmbh Screwable part with integrated screw-in torque limiter

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2021205287A1 (en) * 2020-04-09 2021-10-14 Cochlear Limited Torque limiting drive tools

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2036342A (en) * 1978-11-13 1980-06-25 Atlas Copco Ab Load measuring bolt

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB661643A (en) * 1948-11-19 1951-11-21 Stanley Morton Improvements in and relating to shaft couplings
US3383974A (en) * 1967-07-21 1968-05-21 Norman C. Dahl Load indicating means
GB1287779A (en) * 1969-10-28 1972-09-06 Yorkshire Imp Metals Ltd Screw-threaded nuts
DE2919099A1 (en) * 1979-05-11 1980-11-20 Boellhoff & Co Tightening torque limiting nut - has slots parallel to hexagon faces
DE3437083C2 (en) * 1984-10-05 1986-08-14 Horst-Günter 1000 Berlin Rißmann Tool, in particular screw tool with a torque that can be transmitted to a limited extent
FR2583835B1 (en) * 1985-06-19 1987-09-18 Peugeot TORQUE LIMITER THREADED BUTTON

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2036342A (en) * 1978-11-13 1980-06-25 Atlas Copco Ab Load measuring bolt

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2004042241A1 (en) * 2002-11-08 2004-05-21 Uponor Innovation Ab Connecting piece comprising a gripping element on the outer surface for rotating the connecting piece
US7690699B2 (en) 2002-11-08 2010-04-06 Uponor Innovation Ab Connecting piece comprising a gripping element on the outer surface for rotating the connecting piece
US8276947B2 (en) 2002-11-08 2012-10-02 Uponor Innovation Ab Connecting piece comprising a gripping element on the outer surface for rotating the connecting piece
WO2015185411A1 (en) * 2014-06-06 2015-12-10 Voss Automotive Gmbh Screwable part with integrated screw-in torque limiter
DE102014108035B4 (en) * 2014-06-06 2021-05-12 Voss Automotive Gmbh Screw part with integrated limiter for its screw-in torque

Also Published As

Publication number Publication date
AU8231598A (en) 1999-02-08
WO1999002870A1 (en) 1999-01-21
GB9714136D0 (en) 1997-09-10

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Legal Events

Date Code Title Description
COOA Change in applicant's name or ownership of the application
WAP Application withdrawn, taken to be withdrawn or refused ** after publication under section 16(1)