AU2008200632B2 - Locking washer - Google Patents

Locking washer Download PDF

Info

Publication number
AU2008200632B2
AU2008200632B2 AU2008200632A AU2008200632A AU2008200632B2 AU 2008200632 B2 AU2008200632 B2 AU 2008200632B2 AU 2008200632 A AU2008200632 A AU 2008200632A AU 2008200632 A AU2008200632 A AU 2008200632A AU 2008200632 B2 AU2008200632 B2 AU 2008200632B2
Authority
AU
Australia
Prior art keywords
locking washer
frictional surface
hole
washer
locking
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.)
Ceased
Application number
AU2008200632A
Other versions
AU2008200632A1 (en
Inventor
Hannu Tapio Kangas
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.)
Kangas Eila Anneli
Kangas John Tapio
Kangas Michael Arvi
Original Assignee
Kangas Eila Anneli
Kangas John Tapio
Kangas Michael Arvi
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
Priority claimed from AU2007900643A external-priority patent/AU2007900643A0/en
Application filed by Kangas Eila Anneli, Kangas John Tapio, Kangas Michael Arvi filed Critical Kangas Eila Anneli
Priority to AU2008200632A priority Critical patent/AU2008200632B2/en
Publication of AU2008200632A1 publication Critical patent/AU2008200632A1/en
Application granted granted Critical
Publication of AU2008200632B2 publication Critical patent/AU2008200632B2/en
Ceased legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Landscapes

  • Bolts, Nuts, And Washers (AREA)

Abstract

The invention resides in a locking washer comprising a body having a first frictional surface and a hole extending through the body and the first frictional surface, wherein the hole is adapted to receive a bolt. The locking 5 washer is employed to prevent rotation of a nut or bolt head caused by mechanical vibration or heat fluctuations and is reusable. FIG. 3 18 22 C) C) C) 0) It 0 C) CN) m) 0) qzT C C- N 0 C'

Description

P/00/011 Regulation 3.2 AUSTRALIA Patents Act 1990 ORIGINAL COMPLETE SPECIFICATION STANDARD PATENT Invention Title: "LOCKING WASHER" The following statement is a full description of this invention, including the best method of performing it known to me/us: 1 TITLE "LOCKING WASHER" FIELD OF THE INVENTION The present invention relates to a locking washer. In particular, 5 although not exclusively, the invention relates to a locking washer, locking washer insert, and locking washer assembly that be used with tapered nuts or non-tapered nuts. DESCRIPTION OF THE PRIOR ART Many mechanical assemblies use threaded fasteners to attach their 10 parts to one another. However, threaded fasteners are prone to rotate and loosen when exposed to vibration or heat fluctuations. As such, unless the threaded fastener is inspected on a regular basis, it may eventually fall out of its fastening position. This may cause the parts of the mechanical assembly to break as a result of the extra stress placed on the remaining fasteners 15 holding the parts together, or the parts to detach from each other or fall off the mechanical assembly. As such, it has been an aim of the prior art to provide threaded fasteners that will remain in a fixed position under vibration. Numerous locking devices have been used to secure a threaded fastener in a fixed position. For example, it is well known to use a split ring 20 washer to retain a nut in a fixed position on a bolt, stud, or other external threaded anchor. The ends of the split ring washer are bent in opposite directions to form a spring-like spiral structure which is placed between a nut and a part on a threaded bolt. As the nut is threaded down onto the bolt, the force generated by the split ring washer in resisting compression causes one 2 end of the washer to bite into the nut and the other end of the washer to bite into the part being fastened, preventing the nut from loosening under vibration. Unfortunately, split ring washers are known to slip on the surface of either the nut or part due to the rotational force generated when the nut is 5 over-tightened. This can cause the end of the washer to burr the surface of the nut such that the nut must be discarded. Alternatively, the interface between the washer and the part can become torn, such that the washer no longer sits flush with the part. Another problem of over-tightening the nut is that the ends of the washer can be forced apart, such that the washer 10 becomes deformed, thus making it no longer functional for re-use. Other locking washers are known in the art where tabs are provided around either the inner or outer circumference of the washer body and are bent in alternating directions to project from the bottom and top of the washer such that each tab will either bite into the surface of the nut or the surface of 15 the part being fastened, locking the nut in place. However, a disadvantage of this type of washer is that it cannot be re-used since the tabs are significantly deformed after its initial use and the washer loses its functionality by no longer being able to bite into the nut or the part. In light of the prior art, it is an object of the present invention to at 20 least ameliorate the disadvantages and shortcomings of the prior art, or at least provide the public with a useful alternative. Further objects will be evident from the following description.
3 SUMMARY OF THE INVENTION In one form, although it need not be the only, or indeed the broadest form, the invention resides in a locking washer comprising: a body having a first frictional surface; and 5 a hole extending through the body and the first frictional surface; wherein the hole is adapted to receive a bolt. Preferably, the body of the locking washer includes a second frictional surface through which the hole extends. Alternatively, the hole of the locking washer includes a tapered section 10 that narrows in a direction towards the first frictional surface. Preferably, the tapered section has an angle of inclination between 200 and 70*. More preferably, the tapered section has an angle of inclination between 30* and 600. 15 More preferably, the tapered section has an angle of inclination between 410 and 480. Ideally, the tapered section has an angle of inclination of 45*. The locking washer may further include an insert, the insert comprising: 20 an insert body having a frusto-conical shape and a second frictional surface; and a hole extending through the insert body and the second frictional surface, the hole adapted to receive a bolt; 4 wherein the frusto-conical shape of the insert body is complementary to the tapered section of the hole of the locking washer such that the insert fits inside the hole of the locking washer and the second frictional surface of the insert body is provided on an opposite side to the first frictional surface of the 5 locking washer. Preferably, each frictional surface is formed by a plurality of projections. More preferably, the projections comprise radially extending teeth. More preferably, the teeth are arranged in a series of rows separated 10 by grooves or channel sections. Preferably, the locking washer is made of high tensile steel. More preferably, each frictional surface is case hardened In another form, the invention resides in a locking washer assembly comprising: 15 a locking washer having: a locking washer body; a hole extending through the locking washer body, the hole adapted to receive a bolt and includes a tapered section; and a notch located in an outside wall of the locking washer body; 20 a tie member having: a tie member body fixedly attached to a surface of a part; a hole extending through the tie member body; and a notch located in an inside wall of the hole; a key member; 5 wherein the locking washer fits inside the hole of the tie member and is prevented from rotating inside the hole by aligning the notches adjacent each other to form a recess inserting the key member in the recess. Preferably, the body of the locking washer comprises a first frictional 5 surface. Further features of the present invention will become apparent from the following detailed description. BRIEF DESCRIPTION OF THE DRAWINGS In order that the present invention may be readily understood and put 10 into practical effect, reference will now be made to the accompanying illustrations wherein: FIG. 1 is a top view of a locking washer according to one embodiment of the invention; FIG. 2 is a cut-away side view of the locking washer of FIG. 1 15 FIG. 3 is a bottom view of the locking washer of FIG. 1; FIG. 4 is a top view of a locking washer according to another embodiment of the invention; FIG. 5 is a cut-away side view of the locking washer of FIG. 4; FIG. 6 is a bottom view of the locking washer of FIG. 4; 20 FIG. 7 is a bottom view of a locking washer according to another embodiment of the invention; FIG. 8 is a bottom view of a locking washer according to yet another embodiment of the invention; 6 FIG. 9 is a top view of an insert for fitting inside the locking washer of FIG. 4; FIG. 10 is a cut-away side view of the insert of FIG. 9; FIG. 11 is a bottom view of the insert of FIG. 9; 5 FIG. 12 is a partially cut-away exploded side view of a locking washer assembly including the locking washers of FIGS. 1 and 4; FIG. 13 is a partially cut-away side view of the locking washer assembly of FIG. 12 when assembled; FIG. 14 is a partially cut-away exploded side view of a locking washer 10 assembly including the locking washers of FIGS. 1 and 4 and insert of FIG. 9; FIG. 15 is a partially cut-away side view of the locking washer assembly of FIG. 14 when assembled; FIG. 16 is a partially cut-away exploded side view a locking washer 15 assembly; FIG. 17 is a partially cut-away side view of the locking washer assembly of FIG. 16 when assembled; and FIG. 18. is a top view of the locking washer assembly of FIG. 16. DETAILED DESCRIPTION OF THE DRAWINGS 20 FIGS. 1 to 3 show a locking washer 10 according to an embodiment of the invention. The locking washer 10 has a circular shaped body 12 having a top frictional surface 14, a bottom frictional surface 16, and a hole 18 formed in the centre of the circular body 12 that extends through the top and bottom 7 frictional surfaces 14,16. Each frictional surface 14,16 includes a number of radially extending teeth 20,22 located around the inner circumference of the hole 18. The teeth 20 on the top frictional surface 14 extend from the inner circumference of the hole 18 to approximately halfway between the inner 5 circumference of the hole 18 and the outer circumference of the circular shaped body 12. The teeth 22 on the bottom frictional surface 16 extend from the inner circumference of the hole 18 to the outer circumference of the circular shaped body 12. FIGS. 4 to 6 show a locking washer 40 according to another 10 embodiment of the invention. The locking washer 40 has a circular shaped body 42 having a top planar surface 44, a bottom frictional surface 46 and a hole 48 formed in the centre of the circular body 42 extending through the top planar surface 14 and the bottom frictional surface 46. The hole 48 includes a tapered section 15 50 such that the circumference of the hole 48 becomes progressively smaller towards the bottom frictional surface 46. The tapered section 50 has an angle of inclination of 45*. The hole 48 also includes a straight section 52. The tapered section 50 extends from the top planar surface 44 and the straight section 52 extends from the bottom frictional surface 46 to meet 20 between the top planar surface 44 and bottom frictional surface 46. The bottom frictional surface 46 includes a number of radially extending teeth 54 located around the circumference of the hole 48. FIGS. 7 and 8 show two different teeth formations that may be applied to the bottom frictional surface of the locking washers of FIGS. 1 and 4.
8 FIG. 7 shows the bottom frictional surface 72 comprising an inner and outer row 74,76 of radially extending teeth which are separated by a groove 75. FIG. 8 shows the bottom frictional surface 82 comprising an inner, middle and outer row 84,86,88 of radially extending teeth. The inner and 5 outer rows 84,88 are separated from the middle row 86 by grooves 85,87, respectively. FIGS. 9 to 11 show an insert 90 for fitting inside the locking washer of FIG. 4. The insert 90 has an insert body 92 having a top frictional surface 94, 10 a bottom planar surface 96, and a hole 98 formed in the centre of the body 92 which extends through the top frictional surface 94 and bottom planar surface 96. The top frictional surface 94 comprises a number of radially extending teeth 100 located around the circumference of the hole 98. The insert body 92 comprises a frusto-conical section 102 having an angle of 15 inclination that is complementary with the angle of inclination selected for the tapered section 50 of the locking washer 40. The insert 90 also includes a straight section 104 forming a spigot around an end of the insert body 92. It is appreciated that only the frusto-conical section 102 is necessary for this embodiment of the invention to work properly. The frusto-conical 20 section 102 extends from the top frictional surface 94 while the straight section 104 extends from the bottom planar surface 96 to meet between the top frictional surface 94 and bottom planar surface 96. Each locking washer 10,40 and insert 90 is made from a high tensile steel, such as 4140 or K1045 steel, while each frictional surface of each 9 locking washer 10,40 and insert 90 is case hardened to a factor of 48 to 50 RockwellC using a nitriding process to prevent the teeth from deforming when a compressive force is applied on each frictional surface. However, other case hardening processes can be applied to each frictional surface to 5 prevent the teeth deforming under a compressive load. FIGS. 12 and 13 show a locking washer assembly 120 according to another embodiment of the invention including locking washers 10,40 for locking a nut 121A and bolt 124 in position when joining two parts 130,132 together. 10 A shank 126 of the bolt 124 is first passed through hole 18 of locking washer 10 such that the top frictional surface 14 of locking washer 10 is in contact with a head 128 of the bolt 124. The shank 126 is then passed through holes 134,136 located in each of the parts 130,132, respectively. The shank 126 is finally passed through the hole 48 of the locking washer 40 15 such that teeth 54 located on the bottom frictional surface 46 of the locking washer 40 face part 130. The head 128 of the bolt 124 is held in position as the nut 121A, which has a tapered section 122 conforming with the tapered section 50 of the locking washer 40, is threaded down onto the shank 126 of the bolt 124 until the two parts 130,132 press against each other. Tightening 20 of the nut 121A generates a compressive force between the head 128 of the bolt 124 and the nut 121A. The compressive force causes the teeth 20,22 of locking washer 10 to bite into and mesh with the head 128 of the bolt 124 and part 132, respectively. This effectively turns the bolt 124 into a stud such that the bolt 124 is prevented from rotating with respect to part 132 as 10 the nut 121A is further tightened. The compressive force also causes the teeth 54 of locking washer 40 to bite into and mesh with part 130 to prevent the locking washer 40 from rotating with respect to part 130. The hardness of the locking washers 10,40 prevents the teeth 20,22,54 from deforming 5 under the compressive force exerted between the nut 121A and bolt 124. The conforming tapered sections 122,50 allows the nut 121A to rotate with respect to the locking washer 40, thus preventing a rotational force from being generated that may otherwise cause either the bolt 124 or one of the locking washers 10,40 to rotate as the nut 121A is further tightened due to 10 the teeth 20,22,54 slipping before they can mesh with the head 128 of the bolt 124 and parts 132,130, respectively. The nut 121A is finally locked in position by the compressive force generated between the tapered section 122 of the nut 121A and the tapered section 50 of the locking washer 40 causing the nut 121A to jam inside the locking washer 40. 15 FIGS. 14 and 15 show a locking washer assembly 140 according to another embodiment of the invention including locking washers 10,40 and insert 90 for locking a nut 121B and bolt 124 in position when joining two parts 130,132 together. The locking washer assembly 140 is similar to that shown in FIG. 12 20 except that insert 90 is used in conjunction with locking washer 40 to allow a non-tapered nut 121B to be tightened onto the bolt 124. The compressive force generated by tightening the nut 121B causes teeth 100 on the top frictional surface 94 of the insert 90 to bite into and mesh with the nut 121B to prevent the insert 90 from rotating with respect to the nut 121B. The 111 straight section 104 reinforces the end of the frusto-conical section 102 to prevent the compressive force generated by the nut/bolt interaction from deforming the end of the frusto-conical section 102. The nut 121B is finally locked in position by the compressive force generated between the frusto 5 conical section 102 of the insert 90 and the tapered section 50 of the hole 48 causing the insert 90 to jam inside the locking washer 40. Applying either teeth formations as shown in FIGS. 7 or 8 to the bottom frictional surface 16,46 of the locking washers 10,40 allows rust or other debris on the surface of each part 120,132 to fall into the grooves 10 75,85,87 of each locking washer 10,40, thus preventing the teeth 20,22,54 on each bottom frictional surface 16,46 from becoming clogged. However, it is noted that in some applications it is preferable to use a locking washer assembly having a locking washer 10 that does not include a bottom frictional surface to allow a certain amount of slippage between the 15 part and the head of a bolt or nut. FIGS. 16 to 18 show a locking washer assembly 160 according to yet another embodiment of the invention for locking a tapered nut 121A and bolt 124 in position when joining two parts 130,132 together. The locking washer assembly 160 includes a tie member 170 and a 20 locking washer 180. The tie member 170 includes a tie member body 172 that is welded or otherwise fixedly attached to the surface of part 130. A hole 174 extends through the tie member body 172 and includes a notch 176 located in an inside wall 178 of the tie member 170. The locking washer 180 includes a locking washer body 182, a hole 184 including a tapered section 12 186 extending through the locking washer body 182, and a notch 188 located in an outside wall 190 of the locking washer 180. The hole 174 of the tie member 170 is shaped to allow the locking washer 180 to be inserted inside the tie member body 172. The locking washer 180 is prevented from rotating 5 inside the hole 174 of the tie member 170 by aligning the notches 176,188 adjacent each other to form a recess 192 and inserting a key member 194 into the recess 192. It is to be appreciated that more than one recess 192 can be formed to evenly distribute rotational force exerted between the between the tie member 170 and locking washer 180. 10 While the assemblies of FIGS. 12 and 14 show that the different locking washer embodiments are used in combination with each other, it is to be appreciated that they may also be used independently. It should also be appreciated that the locking washer of FIG. 1 may be used in combination with the locking washer assembly of FIG. 16 to lock the head of the bolt in 15 position, while the insert of FIG. 9 may be used independently for locking a non-tapered nut in a corresponding counter-sunk recess. The first embodiment of the invention effectively turns a bolt into a stud such that the bolt is prevented from rotating by the locking washer as the nut is tightened. This also provides the advantage that the nut threaded 20 on the bolt may be loosened without having to hold the head of the bolt in place. The second embodiment of the invention allows a compressive force to be applied perpendicularly to each surface as the nut is tightened instead of rotationally, such that the pressure of the teeth exerted on the part causes 13 the bottom frictional surface of the locking washer and/or the top frictional surface of the insert to mesh to the part and/or nut, respectively. This arises from the interaction of the taper arrangement between either the washer/nut, the washer/insert assembly, or the insert/countersunk hole allowing the 5 tapered sections to rotate with respect to each other until the compressive force generated by the nut/bolt interaction finally locks the tapered sections together in a complementary fashion. As such, the invention may be used to lock a nut in place without a destructive rotational force being developed between the interface of the nut/washer and/or the washer/part. 10 The invention is reusable since each frictional surface of each locking washer and insert are case hardened to prevent the teeth deforming under the compressive force generated by the nut/bolt interaction. Accordingly, the invention is an excellent locking arrangement in any application where nuts and/or bolts are used and is particularly useful to prevent both left and right 15 hand threaded nuts/bolts from unscrewing in high vibration or fluctuating heat environments. While the shape of the body of each locking washer is shown to be circular, it should be appreciated that it may also be triangular, quadratic, pentagonal, a hexagonal, or some other shape. 20 Finally, it should be appreciated that a nylon sleeve may be inserted in either the hole of the insert or the hole of the locking washer in order that a number of different sized bolts may be used with each locking washer or insert.
14 Throughout the description of this specification, the word "comprise" and variations of that word such as "comprises" and "comprising", are not intended to exclude other additives, components, integers or steps. Throughout the specification the aim has been to describe the 5 invention without limiting the invention to any one embodiment or specific collection of features. Persons skilled in the relevant art may realize variations from the specific embodiments that will nonetheless fall within the scope of the invention.

Claims (14)

1. A locking washer having opposite sides, the locking washer comprising: a body having a first frictional surface at one of the sides; 5 a hole extending through the body from the one side to the opposite side; wherein the hole is adapted to receive a bolt; a rotational axis of the body extends through the hole from the one side to the opposite side; wherein the first frictional surface is formed by a plurality of 10 teeth which extend radially and straight with respect to the rotational axis, each tooth being symmetrical about a flat plane in which the rotational axis is located.
2. The locking washer of claim 1, including the body having a second 15 frictional surface at the opposite side, the second frictional surface also formed by a plurality of teeth which extend radially and straight with respect to the rotational axis, each tooth being symmetrical about a flat plane in which the rotational axis is located. 20
3. The locking washer of claim 1, wherein the hole includes a tapered section.
4. The locking washer of claim 2, wherein the locking washer includes a tapered section of the hole extending through the body and an 25 insert, the insert comprising: 16 an insert body having a frusto-conical shape and having the second frictional surface; and a hole extending through the insert body and the second frictional surface, the hole adapted to receive a bolt; 5 wherein the frusto-conical shape of the insert body is complementary to the tapered section of the hole of the body such that the insert fits inside the hole of the body and the second frictional surface of the insert body is provided on the opposite side to the first frictional surface of the locking washer. 10
5. The locking washer of any one of the preceding claims, wherein the teeth of the first frictional surface are arranged in a series of rows separated by circumferential grooves or channel sections. 15
6. The locking washer of any of the preceding claims, wherein the locking washer is made of high tensile steel.
7. The locking washer of any one of the preceding claims, wherein each frictional surface is case hardened. 20
8. The locking washer of claim 3 or claim 4, wherein the tapered section narrows in a direction towards the first frictional surface.
9. The locking washer of claim 8, wherein the tapered section has an 25 angle of inclination between 20* and 70*. 17
10. The locking washer of claim 8, wherein the tapered section has an angle of inclination between 30* and 60*. 5
11. The locking washer of claim 8, wherein the tapered section has an angle of inclination between 410 and 480.
12. The locking washer of claim 8, wherein the tapered section has an angle of inclination of 45*. 10
13. The locking washer as defined in claim 1 with reference to the accompanying drawings of FIGS 1 to 3.
14. The locking washer as defined in claim 1 with reference to the 15 accompanying drawings of FIGS 4 to 11.
AU2008200632A 2007-02-09 2008-02-11 Locking washer Ceased AU2008200632B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AU2008200632A AU2008200632B2 (en) 2007-02-09 2008-02-11 Locking washer

Applications Claiming Priority (5)

Application Number Priority Date Filing Date Title
AU2007900643 2007-02-09
AU2007900643A AU2007900643A0 (en) 2007-02-09 Locking washer
AU2007905964 2007-10-31
AU2007905964A AU2007905964A0 (en) 2007-10-31 Locking washer
AU2008200632A AU2008200632B2 (en) 2007-02-09 2008-02-11 Locking washer

Publications (2)

Publication Number Publication Date
AU2008200632A1 AU2008200632A1 (en) 2008-08-28
AU2008200632B2 true AU2008200632B2 (en) 2011-06-30

Family

ID=39735939

Family Applications (1)

Application Number Title Priority Date Filing Date
AU2008200632A Ceased AU2008200632B2 (en) 2007-02-09 2008-02-11 Locking washer

Country Status (1)

Country Link
AU (1) AU2008200632B2 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111075826A (en) * 2013-12-17 2020-04-28 凯特克分部尤尼克斯公司 Reaction washer and its fastening sleeve

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102020126247A1 (en) * 2020-10-07 2022-04-07 Adolf Schnorr Gmbh & Co. Kg Lock washer for a screw connection and screw connection

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1005227A (en) * 1910-12-27 1911-10-10 Daniel Palmer Jones Device for gripping fastening, or locking purposes.
GB458982A (en) * 1934-03-26 1936-12-31 Shakeproof Lock Washer Co Improvements in or relating to lock washers
GB878470A (en) * 1958-08-26 1961-09-27 Theresia Arnold Improvements in lock washers
GB1313691A (en) * 1969-05-09 1973-04-18 Nouveautes Mecaniques Et Elect Composite locking and sealing washer
DE2811108A1 (en) * 1978-03-15 1979-09-20 Bauer Gmbh & Co Carl Toothed locking washer for nut or bolt - has tooth rear faces steeper on side furthest from screw head
US6244806B1 (en) * 1997-12-09 2001-06-12 T. Kato Co., Ltd. Locking washer and locking apparatus using the same

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1005227A (en) * 1910-12-27 1911-10-10 Daniel Palmer Jones Device for gripping fastening, or locking purposes.
GB458982A (en) * 1934-03-26 1936-12-31 Shakeproof Lock Washer Co Improvements in or relating to lock washers
GB878470A (en) * 1958-08-26 1961-09-27 Theresia Arnold Improvements in lock washers
GB1313691A (en) * 1969-05-09 1973-04-18 Nouveautes Mecaniques Et Elect Composite locking and sealing washer
DE2811108A1 (en) * 1978-03-15 1979-09-20 Bauer Gmbh & Co Carl Toothed locking washer for nut or bolt - has tooth rear faces steeper on side furthest from screw head
US6244806B1 (en) * 1997-12-09 2001-06-12 T. Kato Co., Ltd. Locking washer and locking apparatus using the same

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111075826A (en) * 2013-12-17 2020-04-28 凯特克分部尤尼克斯公司 Reaction washer and its fastening sleeve

Also Published As

Publication number Publication date
AU2008200632A1 (en) 2008-08-28

Similar Documents

Publication Publication Date Title
KR101027753B1 (en) Combination Bolt-Nut Locks
JP3733534B2 (en) Locking fastener
US7128511B2 (en) Fastener
AU2005317992B2 (en) Tamper resistant fastener
US6039524A (en) Self-locking safety wheel nut with locking wrench
EP3587842B1 (en) Fastening structure
US6347915B1 (en) Lock washer for threaded fasteners
US20090304443A1 (en) Bolt with collar and flexible sleeve insert
US20100247266A1 (en) Self-locking nut
US20130164093A1 (en) Fastener
JP2009275727A (en) Looseness preventing locking device
GB2421555A (en) Tamper resistant fastener
GB2027153A (en) Anchor bolt assembly
CA2349554C (en) Fastener
AU2008200632B2 (en) Locking washer
WO2004113744A1 (en) Loosening prevention structure for bolt and nut
JP2012251648A (en) Screw fastener
JP2008215466A (en) Locking bolt
AU2009100347A4 (en) Unlocking-resistant and loosening-resistant nut assembly
JP2001065533A (en) Loosening prevention bolt
WO2004065804A1 (en) Locking bolt
JP2005127429A (en) Screw fastening body having loosing prevention property and fastening release apparatus used therefor
KR20240076136A (en) Washers and nuts with anti-loosening function for bolts
JP2024089112A (en) One-way clutch and fastener using same
JP2000027838A (en) Locking nut

Legal Events

Date Code Title Description
FGA Letters patent sealed or granted (standard patent)
MK14 Patent ceased section 143(a) (annual fees not paid) or expired