GB2090361A - Anti-theft wheel nut - Google Patents

Anti-theft wheel nut Download PDF

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Publication number
GB2090361A
GB2090361A GB8041603A GB8041603A GB2090361A GB 2090361 A GB2090361 A GB 2090361A GB 8041603 A GB8041603 A GB 8041603A GB 8041603 A GB8041603 A GB 8041603A GB 2090361 A GB2090361 A GB 2090361A
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GB
United Kingdom
Prior art keywords
nut
cover
groove
wheel
stud
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.)
Granted
Application number
GB8041603A
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GB2090361B (en
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P & S Engineering
Original Assignee
P & S Engineering
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 P & S Engineering filed Critical P & S Engineering
Priority to GB8041603A priority Critical patent/GB2090361B/en
Publication of GB2090361A publication Critical patent/GB2090361A/en
Application granted granted Critical
Publication of GB2090361B publication Critical patent/GB2090361B/en
Expired legal-status Critical Current

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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
    • F16B41/00—Measures against loss of bolts, nuts, or pins; Measures against unauthorised operation of bolts, nuts or pins
    • F16B41/005—Measures against unauthorised operation of bolts, nuts or pins

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Bolts, Nuts, And Washers (AREA)

Abstract

An anti-theft screw-threaded nut assembly consists of a hexagon headed nut 3 containing a circumferential groove 4 in which is located a spring ring 5 which projects from the nut, and a cover 6 located over the nut which has a closed end and includes an internal groove 7 corresponding to the groove 4 in the nut and retained in position by co-operation of its groove 7 with the spring ring 5, the cover 6 being rotatable relative to the nut 3. The closed end of the cover includes a threaded aperture 9 adapted to receive a bolt 8 which bears against the end of stud 2 threaded into nut 3 to cause the cover 6 to be pulled off the nut 3. <IMAGE>

Description

SPECIFICATION Anti-theft wheel nut The present invention relates to a screw threaded nut assembly equipped with anti-theft means and is especially suitable for use in retaining road wheels on vehicle axles.
The high cost of wheels and tyres has made the theft thereof profitable especially in the case of wheels for large vehicles such as lorries or trailers.
Various means have been suggested for locking the wheel nuts onto their studs, to prevent unauthorised removal, for example lockingwheel nuts, but these tend to be expensive and are also likely to become jammed as a result of the ingress of dirt and moisture.
We have now found a convenient method for rendering a wheel proof against casual unauthorised attempts at removal for the purposes oftheft.
Accordingly, therefore, the present invention provides a screw threaded nut assembly comprising: a) a body portion having an internal bore screw threaded to receive a complimentary screw threaded bolt or stud, means to enable the nut to be moved axially along the thread of the said bolt or stud and a circumferential groove formed in the outside thereof coaxially with the said bore; b) a cover extending around the said nut and over one end thereof said cover including an inner circumferential groove located opposite to the groove in said nut and means to permit removal ofthe cover from said nut.
c) means contained in one said groove and extending outwardly from the periphery thereof for cooperation with the other said groove to retain the cover in position overthe nut.
Preferably, in use, the cover is dimensioned to extend to touch the wheel to provide minimum clearance between the wheel and the cover and is also rotatable around the nut.
The means to enable the nut to be moved axially along the thread of the bolt or stud will normally comprise flattened portions on the outside of the said body, said portions being arranged to cooperate with a spanner or other means, e.g. a spider in the case of wheel nuts, for effecting said movement.
The means contained in the groove formed in the outside of said nut body may conveniently comprise a spring ring dimensioned such that some radial movement thereof in the said groove is allowed.
The means to permit removal of the cover from the said nut may conveniently comprise a threaded aperture formed in the top of the cover and coaxially therewith, into which a threaded bolt can be inserted to cause said cover to be pulled off from the said nut.
The invention will now be more fully described with reference to the accompanying drawing. The drawing is a diagrammatic representation of a cross section of one assembly according to the present invention applied to the stud of a wheel.
In the drawing a wheel 1 contains an outwardly extending screw threaded stud 2. The wheel is retained on the stud by a hexagon shaped nut 3 which is tightened against the wheel in a conventional manner using a spider or other means. A groove 4 is formed circumferentially in the nut outer surface and contains a spring ring 5 which projects from the surface of the nut and is sufficiently oversize to allow some radial movement within the groove.
A cover 6 includes a groove 7 formed within the inner wall thereof and an aperture 9 is screw threaded to receive a bolt 8. Groove 7 co-operates with the projecting portion of the spring ring 5 to retain the cover 6 in position on the nut 3.
As shown in the drawing the cover is freely rotatable about the nut and therefore the nut cannot be removed from the stud until the cover has first been removed. Because the ends of the cover are in contact with the wheel 1 there is minimal space available for a tool to be inserted to force the cover over the spring ring 5. When it is desired to remove the cover the bolt 8 is inserted through the aperture 9 and screwed down onto the stud forcing groove 7 over the spring ring 5 to release the cover.
For insertion over the nut the reverse procedure is used, the nut is first tightened onto the wheel and then the cover (without the bolt 8) forced over the spring ring 5 to be located in position in groove 7.
The axially extending dimension of the inner circumferential groove in the cover may be made adjustable to allow for variations in the manufacture of original wheels and the cone nut seating used on many wheels. This adjustability may be achieved by forming the outermost radially directed wall of the groove from a screwed ring insert. A shoulder, to form the other wall of the groove, is formed in the cover by boring out to the required groove depth.
The bored out portion is tapped to apply a screw thread thereto and a ring, having a complimentary screw thread and a thickness equal to the groove depth, inserted to form the said outermost wall of the groove. Correct positioning of the ring ensures that the inner end of the cover is flush against the wheel when in use.
1. Ascrew-threaded nut assembly comprising a) a body portion having an internal bore screw threaded to receive a compilmentary~screw- threaded bolt or stud, means to enable the nut to be moved axially along the thread of the said bolt or stud and a circumferential groove formed in the outside surface thereof; b) a cover extending around said nut and over one end thereof; said cover including an inner circumferential groove positioned for alignment with the groove in said nut and means to permit removal of the said cover from said nut, c) means contained in one said groove and extending outwardly from the periphery thereof for cooperation with the other said groove to retain the cover in position over the nut.
**WARNING** end of DESC field may overlap start of CLMS **.

Claims (7)

**WARNING** start of CLMS field may overlap end of DESC **. SPECIFICATION Anti-theft wheel nut The present invention relates to a screw threaded nut assembly equipped with anti-theft means and is especially suitable for use in retaining road wheels on vehicle axles. The high cost of wheels and tyres has made the theft thereof profitable especially in the case of wheels for large vehicles such as lorries or trailers. Various means have been suggested for locking the wheel nuts onto their studs, to prevent unauthorised removal, for example lockingwheel nuts, but these tend to be expensive and are also likely to become jammed as a result of the ingress of dirt and moisture. We have now found a convenient method for rendering a wheel proof against casual unauthorised attempts at removal for the purposes oftheft. Accordingly, therefore, the present invention provides a screw threaded nut assembly comprising: a) a body portion having an internal bore screw threaded to receive a complimentary screw threaded bolt or stud, means to enable the nut to be moved axially along the thread of the said bolt or stud and a circumferential groove formed in the outside thereof coaxially with the said bore; b) a cover extending around the said nut and over one end thereof said cover including an inner circumferential groove located opposite to the groove in said nut and means to permit removal ofthe cover from said nut. c) means contained in one said groove and extending outwardly from the periphery thereof for cooperation with the other said groove to retain the cover in position overthe nut. Preferably, in use, the cover is dimensioned to extend to touch the wheel to provide minimum clearance between the wheel and the cover and is also rotatable around the nut. The means to enable the nut to be moved axially along the thread of the bolt or stud will normally comprise flattened portions on the outside of the said body, said portions being arranged to cooperate with a spanner or other means, e.g. a spider in the case of wheel nuts, for effecting said movement. The means contained in the groove formed in the outside of said nut body may conveniently comprise a spring ring dimensioned such that some radial movement thereof in the said groove is allowed. The means to permit removal of the cover from the said nut may conveniently comprise a threaded aperture formed in the top of the cover and coaxially therewith, into which a threaded bolt can be inserted to cause said cover to be pulled off from the said nut. The invention will now be more fully described with reference to the accompanying drawing. The drawing is a diagrammatic representation of a cross section of one assembly according to the present invention applied to the stud of a wheel. In the drawing a wheel 1 contains an outwardly extending screw threaded stud 2. The wheel is retained on the stud by a hexagon shaped nut 3 which is tightened against the wheel in a conventional manner using a spider or other means. A groove 4 is formed circumferentially in the nut outer surface and contains a spring ring 5 which projects from the surface of the nut and is sufficiently oversize to allow some radial movement within the groove. A cover 6 includes a groove 7 formed within the inner wall thereof and an aperture 9 is screw threaded to receive a bolt 8. Groove 7 co-operates with the projecting portion of the spring ring 5 to retain the cover 6 in position on the nut 3. As shown in the drawing the cover is freely rotatable about the nut and therefore the nut cannot be removed from the stud until the cover has first been removed. Because the ends of the cover are in contact with the wheel 1 there is minimal space available for a tool to be inserted to force the cover over the spring ring 5. When it is desired to remove the cover the bolt 8 is inserted through the aperture 9 and screwed down onto the stud forcing groove 7 over the spring ring 5 to release the cover. For insertion over the nut the reverse procedure is used, the nut is first tightened onto the wheel and then the cover (without the bolt 8) forced over the spring ring 5 to be located in position in groove 7. The axially extending dimension of the inner circumferential groove in the cover may be made adjustable to allow for variations in the manufacture of original wheels and the cone nut seating used on many wheels. This adjustability may be achieved by forming the outermost radially directed wall of the groove from a screwed ring insert. A shoulder, to form the other wall of the groove, is formed in the cover by boring out to the required groove depth. The bored out portion is tapped to apply a screw thread thereto and a ring, having a complimentary screw thread and a thickness equal to the groove depth, inserted to form the said outermost wall of the groove. Correct positioning of the ring ensures that the inner end of the cover is flush against the wheel when in use. CLAIMS
1. Ascrew-threaded nut assembly comprising a) a body portion having an internal bore screw threaded to receive a compilmentary~screw- threaded bolt or stud, means to enable the nut to be moved axially along the thread of the said bolt or stud and a circumferential groove formed in the outside surface thereof; b) a cover extending around said nut and over one end thereof; said cover including an inner circumferential groove positioned for alignment with the groove in said nut and means to permit removal of the said cover from said nut,
c) means contained in one said groove and extending outwardly from the periphery thereof for cooperation with the other said groove to retain the cover in position over the nut.
2. An assembly according to claim 1 wherein said nut is a vehicle wheel nut and, in use, the cover extends overthe nut to contact the said wheel.
3. An assembly according to claim 1 or claim 2 wherein the outermost radially directed wall of the groove in said cover is formed by a ring screw threadedlyinserted into said core for axial adjustment therein.
4. An assembly according to any one of claims 1 tow3 wherein the means to enable the nut to be moved axially along the thread of the bolt or stud consists of flattened portions parallel to the axis of the body and positioned for co-operation with tightening or releasing means.
5. An assembly according to any one of claims 1 to 4 wherein the means contained in the one said groove is a spring ring.
6. An assembly according to any one of claims 1 to 5 wherein the means to remove said cover from said body includes a threaded aperture formed in the closed end and coaxial with the bore thereof, capable of receiving a threaded bolt to cause said cover to be pulled off said body.
7. An assembly according to claim 1 when positioned on a vehicle wheel stud substantially as herein described with reference to the drawings.
GB8041603A 1980-12-31 1980-12-31 Anti-theft wheel nut Expired GB2090361B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB8041603A GB2090361B (en) 1980-12-31 1980-12-31 Anti-theft wheel nut

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB8041603A GB2090361B (en) 1980-12-31 1980-12-31 Anti-theft wheel nut

Publications (2)

Publication Number Publication Date
GB2090361A true GB2090361A (en) 1982-07-07
GB2090361B GB2090361B (en) 1984-07-18

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Family Applications (1)

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Cited By (16)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2531155A1 (en) * 1982-07-27 1984-02-03 Delta Mics Device for preventing a nut, a screw or a fixing bolt from loosening.
GB2167516A (en) * 1984-11-26 1986-05-29 Key Internal Mfg Inc Wheel nut
US4611379A (en) * 1983-08-01 1986-09-16 H&E Machine Company Method of removably securing a security threaded fastener apparatus
DE3541344A1 (en) * 1985-06-13 1986-12-18 Key International Manufacturing, Inc., Southfield, Mich. METHOD FOR PRODUCING A WHEEL NUT
US4690167A (en) * 1986-07-21 1987-09-01 Productive Instrument & Machine Inc. Fireplug anti-theft apparatus
GB2189858A (en) * 1986-04-29 1987-11-04 Sourdillon Airindex Sa Retaining components to tools
US4784555A (en) * 1985-09-09 1988-11-15 Cantrell Roger M Protective and ornamental cover for nuts and bolts
GB2259554A (en) * 1991-09-13 1993-03-17 Security Fasteners And Fixings Anti-tamper cover for nut or bolthead
AT400475B (en) * 1993-09-30 1996-01-25 Kreutzinger Johann CONNECTING BODY
EP0801235A1 (en) * 1996-04-11 1997-10-15 e i b e Produktion- + Vertrieb GmbH Cap for a nut and tool for its manipulation
DE19810049A1 (en) * 1998-03-09 1999-09-16 Grote & Hartmann Lead element with lead-sealing cap on threaded bolt with screw-nut
AU733725B1 (en) * 2000-04-14 2001-05-24 Okamura Yugen Gaisha Covering device for nut and covering device for bolt head
DE10004788A1 (en) * 2000-02-03 2001-09-20 Wilhelm Hueselmann Anti-tamper gas pipe lock nut fitting has outer groove for spring and surfaces for a hexagonal spanner
CN106530654A (en) * 2016-11-04 2017-03-22 国网山东省电力公司日照供电公司 Electric remote meter reading system
CN107269668A (en) * 2017-07-27 2017-10-20 海盐东盛紧固件制造有限公司 A kind of locked anti-theft bolt group
CN110285126A (en) * 2019-07-25 2019-09-27 海盐宏合标准件有限公司 A kind of multifunctional nut bolt assembly

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110332211B (en) * 2019-07-10 2021-04-13 嘉兴建盛五金科技股份有限公司 Anti-theft inner hexagonal nut

Cited By (20)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2531155A1 (en) * 1982-07-27 1984-02-03 Delta Mics Device for preventing a nut, a screw or a fixing bolt from loosening.
US4611379A (en) * 1983-08-01 1986-09-16 H&E Machine Company Method of removably securing a security threaded fastener apparatus
GB2167516A (en) * 1984-11-26 1986-05-29 Key Internal Mfg Inc Wheel nut
DE3541344A1 (en) * 1985-06-13 1986-12-18 Key International Manufacturing, Inc., Southfield, Mich. METHOD FOR PRODUCING A WHEEL NUT
FR2583471A1 (en) * 1985-06-13 1986-12-19 Key Internal Mfg Inc METHOD FOR MANUFACTURING AN IMPROVED WHEEL NUT
GB2176859A (en) * 1985-06-13 1987-01-07 Key Internal Mfg Inc Wheel nuts and method of making same
US4784555A (en) * 1985-09-09 1988-11-15 Cantrell Roger M Protective and ornamental cover for nuts and bolts
GB2189858A (en) * 1986-04-29 1987-11-04 Sourdillon Airindex Sa Retaining components to tools
US4690167A (en) * 1986-07-21 1987-09-01 Productive Instrument & Machine Inc. Fireplug anti-theft apparatus
GB2259554B (en) * 1991-09-13 1995-04-05 Security Fasteners And Fixings Fastener and cover and method of covering a part of a fastener
GB2259554A (en) * 1991-09-13 1993-03-17 Security Fasteners And Fixings Anti-tamper cover for nut or bolthead
AT400475B (en) * 1993-09-30 1996-01-25 Kreutzinger Johann CONNECTING BODY
EP0801235A1 (en) * 1996-04-11 1997-10-15 e i b e Produktion- + Vertrieb GmbH Cap for a nut and tool for its manipulation
DE19810049A1 (en) * 1998-03-09 1999-09-16 Grote & Hartmann Lead element with lead-sealing cap on threaded bolt with screw-nut
DE10004788A1 (en) * 2000-02-03 2001-09-20 Wilhelm Hueselmann Anti-tamper gas pipe lock nut fitting has outer groove for spring and surfaces for a hexagonal spanner
DE10004788C2 (en) * 2000-02-03 2002-03-28 Wilhelm Hueselmann Device for securing a screw connection against unauthorized opening
AU733725B1 (en) * 2000-04-14 2001-05-24 Okamura Yugen Gaisha Covering device for nut and covering device for bolt head
CN106530654A (en) * 2016-11-04 2017-03-22 国网山东省电力公司日照供电公司 Electric remote meter reading system
CN107269668A (en) * 2017-07-27 2017-10-20 海盐东盛紧固件制造有限公司 A kind of locked anti-theft bolt group
CN110285126A (en) * 2019-07-25 2019-09-27 海盐宏合标准件有限公司 A kind of multifunctional nut bolt assembly

Also Published As

Publication number Publication date
GB2090361B (en) 1984-07-18

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