GB2515789A - Threaded stud with thread captivating knurl - Google Patents
Threaded stud with thread captivating knurl Download PDFInfo
- Publication number
- GB2515789A GB2515789A GB1311971.4A GB201311971A GB2515789A GB 2515789 A GB2515789 A GB 2515789A GB 201311971 A GB201311971 A GB 201311971A GB 2515789 A GB2515789 A GB 2515789A
- Authority
- GB
- United Kingdom
- Prior art keywords
- thread
- threaded stud
- knurled section
- section
- knurled
- 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- Withdrawn
Links
- 239000000126 substance Substances 0.000 claims description 6
- 238000004519 manufacturing process Methods 0.000 claims description 3
- 229910000831 Steel Inorganic materials 0.000 claims description 2
- 239000007767 bonding agent Substances 0.000 claims description 2
- 239000010959 steel Substances 0.000 claims description 2
- 239000012207 thread-locking agent Substances 0.000 claims description 2
- 230000002411 adverse Effects 0.000 description 1
- 239000011013 aquamarine Substances 0.000 description 1
- 230000000712 assembly Effects 0.000 description 1
- 238000000429 assembly Methods 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 230000000717 retained effect Effects 0.000 description 1
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
- F16B39/00—Locking of screws, bolts or nuts
- F16B39/22—Locking of screws, bolts or nuts in which the locking takes place during screwing down or tightening
- F16B39/28—Locking of screws, bolts or nuts in which the locking takes place during screwing down or tightening by special members on, or shape of, the nut or bolt
- F16B39/30—Locking exclusively by special shape of the screw-thread
-
- 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
- F16B39/00—Locking of screws, bolts or nuts
- F16B39/22—Locking of screws, bolts or nuts in which the locking takes place during screwing down or tightening
- F16B39/28—Locking of screws, bolts or nuts in which the locking takes place during screwing down or tightening by special members on, or shape of, the nut or bolt
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Connection Of Plates (AREA)
Abstract
A fastener A includes a threaded section and a knurled section D. The knurled section D acts as a locking feature for the fastener A.
Description
DECRIPTION
THREADED STUD SELF CAPTIVATING
when a conventional engineers stud is screwed into a female/tapped hole the plain section of the stud can after time cause the female/tapped hole to become damaged and at worse cause the thread to strip out completely and as sometimes thread repair is not always possible then the whole componentry is renderd as scrap. this is because the plain section of a conventional engineers stud jams up or butts up to the thread causing the threads to stretch which in turn leads to the above undesirable situation.
the advantage of the titled is that instead of a plain section it has a knurled section that wont buff up or jam up. instead it captivates the thread enough so that the threads are are engaged but tight enough to be retained in the female/tapped hole.
the knurling of the thread displaces the material so the diameter increases slightly so any knurled surface that is not in contact with the thread can be used as a bearing surface. this also means that the crest of the thread is flat but the threads are not truncated.
the main difference with the knurled section is that thread engagement still occurs only it offers more resistance and can be removed from tappedlfemale thread without damage to both male and female componentry assembling the stud into the female/tapped hole is the same as a conventional engineers stud with two nuts clamped together on one end of the thread createing a means of screwing the stud into the female tapped hole the knurled section must not be used for this purpose because it will captivate the nut.
this version of the engineers stud would be a more enviromentally freindly option especially if used in the aqua marine industries as some plastic/chemical thread locking agents state that theirs can be adverse to the enviroment.
this type of thread captivation is a more desirable alternative to chemical/plastic thread captivation if components are subject to heat. this is because chemical/plastic thread captivating agents are only effective according to the prevailing temperature that is generated by the application the components are used in. therefore if a lot of these were to be used in certain assemblies the cost of manufacture this idea can be used on any thread pitch on any steels that are able to be machined and have been tried on diameters from 6mm to 25mm or if imperial 1/4 to 1 inch.
the knurl can be placed anywhere on the stud to produce the desired thread length to be used before captivation occurs.
the process of making this type of stud requires fewer operations therefore reducing manufacturing time when compared to a conventional engineers stud.because of the knurled section having thread captivation capabilities it can eliminate the need for chemical/plastic thread bonding agents.
the pressure applied to the knurl changes the torque required on assembly. conventional engineers studs are used in a wide variety of industries so this alternative may overcome the afore mentioned problems.
the next few pages show some drawings give more detail.
figure 1 shows the lockstud un assembled A shows the knurled area.
figure 2 shows the stud assembled into the tapped hole and section A shows the point where the thread becomes captivated figure 3 shows the stud assembled in sittu with a cover or plate C screwed on by nuts d and A shows the knurled section screwed in enough so that the nut D does not become captive allowing dissasembly without stud coming out.
figure 4 shows how the knurl could be used for a slightly different application being a bolt holding a plate or sheet but this tme the nut is captive.
A shows the bolt B shows the nut C shows the plate or block D shows the knurled section and E shows the head of the bolt.
figure 5 shows how the knurled section can be placed in two places createing two areas of thread captivation A shows two knurled sections where captivation occurs.
figure 6 shows a close up of the thread and knurled section A shows the effect of knurl with flat raised threads. B shows normal section of thread.
figure 7 shows a typical flange /cylinder and flange/cylinder cover with six of these knurled studs assembled this is a typical situation that these knurled studs would be used.
A shows shows the studs in the tapped holes in cylinder/flange B shows the flange cover C shows the flange/cylinder housing itself.
all other drawings show individual assembly apart from figures 1 5 and6 which show knurled studs unassembled.
Claims (1)
- BCLAIMS1 A threaded stud with knurled section that acts as a thread lock/thread captivation 2A threaded stud with knurled section that replaces the plain section causing less damage to female thread or tapped hole 3A threaded stud with knurled section that acts as a threadlock/thread captivation that eliminates the need for plastic /chemical thread locking/ bonding agents 4A a threaded stud with knurled section that can be implemented on any thread pitch 5A threaded stud with knurled section that can be applied to any steels that are machineable 6A a threaded stud with knurled section that can be applied to diameters ranging from 6mm to 25mm 7 a threaded stud with knurled section that can be applied to imperial diameters ranging from 1/4 inch to 1 inch 8 A threaded stud with knurled section that on manufacture requires fewer operations 9 a threaded stud with knurled section that is more thermally stable than chemical/plastic thread captivation alternatives
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB1311971.4A GB2515789A (en) | 2013-07-04 | 2013-07-04 | Threaded stud with thread captivating knurl |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB1311971.4A GB2515789A (en) | 2013-07-04 | 2013-07-04 | Threaded stud with thread captivating knurl |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| GB201311971D0 GB201311971D0 (en) | 2013-08-21 |
| GB2515789A true GB2515789A (en) | 2015-01-07 |
Family
ID=49033293
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB1311971.4A Withdrawn GB2515789A (en) | 2013-07-04 | 2013-07-04 | Threaded stud with thread captivating knurl |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB2515789A (en) |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB467169A (en) * | 1935-04-26 | 1937-06-07 | Standard Pressed Steel Co | Improvements in set screws |
| EP0999076A2 (en) * | 1998-11-02 | 2000-05-10 | SKF INDUSTRIE S.p.A. | Improved studs for connecting a wheel and a brake element to a motor vehicle wheel hub unit |
| CN201433986Y (en) * | 2009-07-21 | 2010-03-31 | 任旭辉 | Knurled self-locking bolt |
| CN202690665U (en) * | 2012-06-21 | 2013-01-23 | 昆山神昌精密金属制品有限公司 | Screw |
| CN202851575U (en) * | 2012-09-25 | 2013-04-03 | 浙江奥展实业有限公司 | Cross-shaped large flat head screw for nuclear power |
-
2013
- 2013-07-04 GB GB1311971.4A patent/GB2515789A/en not_active Withdrawn
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB467169A (en) * | 1935-04-26 | 1937-06-07 | Standard Pressed Steel Co | Improvements in set screws |
| EP0999076A2 (en) * | 1998-11-02 | 2000-05-10 | SKF INDUSTRIE S.p.A. | Improved studs for connecting a wheel and a brake element to a motor vehicle wheel hub unit |
| CN201433986Y (en) * | 2009-07-21 | 2010-03-31 | 任旭辉 | Knurled self-locking bolt |
| CN202690665U (en) * | 2012-06-21 | 2013-01-23 | 昆山神昌精密金属制品有限公司 | Screw |
| CN202851575U (en) * | 2012-09-25 | 2013-04-03 | 浙江奥展实业有限公司 | Cross-shaped large flat head screw for nuclear power |
Also Published As
| Publication number | Publication date |
|---|---|
| GB201311971D0 (en) | 2013-08-21 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| WAP | Application withdrawn, taken to be withdrawn or refused ** after publication under section 16(1) |