US3134291A - Non-removable screw - Google Patents
Non-removable screw Download PDFInfo
- Publication number
- US3134291A US3134291A US143953A US14395361A US3134291A US 3134291 A US3134291 A US 3134291A US 143953 A US143953 A US 143953A US 14395361 A US14395361 A US 14395361A US 3134291 A US3134291 A US 3134291A
- Authority
- US
- United States
- Prior art keywords
- head
- screw
- opening
- shank
- pins
- 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.)
- Expired - Lifetime
Links
- 229910052751 metal Inorganic materials 0.000 claims description 3
- 239000002184 metal Substances 0.000 claims description 3
- 238000010008 shearing Methods 0.000 claims description 2
- QGZKDVFQNNGYKY-UHFFFAOYSA-N Ammonia Chemical compound N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 2
- 229910052799 carbon Inorganic materials 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 238000004080 punching Methods 0.000 description 2
- XFXPMWWXUTWYJX-UHFFFAOYSA-N Cyanide Chemical compound N#[C-] XFXPMWWXUTWYJX-UHFFFAOYSA-N 0.000 description 1
- 229910001209 Low-carbon steel Inorganic materials 0.000 description 1
- 229910000831 Steel Inorganic materials 0.000 description 1
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 description 1
- 229910021529 ammonia Inorganic materials 0.000 description 1
- UFGZSIPAQKLCGR-UHFFFAOYSA-N chromium carbide Chemical compound [Cr]#C[Cr]C#[Cr] UFGZSIPAQKLCGR-UHFFFAOYSA-N 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 229910003460 diamond Inorganic materials 0.000 description 1
- 239000010432 diamond Substances 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 230000003340 mental effect Effects 0.000 description 1
- 150000002739 metals Chemical class 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 229910001220 stainless steel Inorganic materials 0.000 description 1
- 239000010935 stainless steel Substances 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 239000010936 titanium Substances 0.000 description 1
- 229910052719 titanium Inorganic materials 0.000 description 1
- 229910003470 tongbaite Inorganic materials 0.000 description 1
Images
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
- F16B23/00—Specially shaped nuts or heads of bolts or screws for rotations by a tool
- F16B23/0069—Specially shaped nuts or heads of bolts or screws for rotations by a tool with holes to be engaged with corresponding pins on the tool or protruding pins to be engaged with corresponding holes on the tool
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10S411/00—Expanded, threaded, driven, headed, tool-deformed, or locked-threaded fastener
- Y10S411/91—Antitamper means
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10S411/00—Expanded, threaded, driven, headed, tool-deformed, or locked-threaded fastener
- Y10S411/919—Screw having driving contacts
Definitions
- FIG. 3 y 26, 1954 J. K. BARRY NON-REMOVABLE SCREW Filed Oct. 9, 1961 FIG. 3
- a principal object of the invention is to provide a.
- Another object is to provide such a screw with a head that cannot be sawed, chiseled, and drilled toform a slot or hole to receive a tool for removingthe screw.
- Another object is to provide such a screw which may be'installed quickly and at minimum cost, and which, when installed, presents a smooth, attractive head without any necessity for a grinding or any other secondary operation.
- FIG. 1 is a section through a punch. press, showing the press about to close on a flattened button head screw;
- FIG. 2 is'similar to FIG. 1, but shows the condition of parts after the punching operation
- FIG. 3 is a perspective viewpf the fully formed screw
- FIG. 4 is a perspectiveview looking atthe lower end of a tool used til-apply thescrewj v
- FIG. 5 is a section'showing the tool applying the screw tothe work;
- FIG. 6 is similar to FIG. 5, but shows the final stage in the application of the screw to the work; I 7 FIG. 7 is a perspective view showing the screw applied tothework; M 1
- FIG. 8 is a section through a punchpress showing the press. about to close on a countersunk head. screw;
- FIG. 2 is similar to'FIG. 8, but shows the condition of partsfaf ter the" punching operation; l
- FIG. 10 is a perspective view'of the fully formed screw shown in FI G@9; V
- FIG. v1'1 is a perspective'vicw looking at the lower end of a tool used to apply the countersunk head screw
- FIG. 12 is a section showing the tool applying the countersunk head screw to the work
- FIG. 13 is similar to FIG. 12, but shows the final stage in the application of the countersunk head screw to the work; *and e -FIG.14 is a perspective view showing the countersunk head screw applied to the work.
- a nonremovable I punch bars 28 having square cut working ends.
- the head of the punch press mounted upon the bed 24 of the punch press by inserting 3,134,291 Patented May 26,, 1964 drical opening 26, and on diametrically opposite sides of the opening 26 respectively are a pair of axially shiftable
- the head of the punch press is provided with a cavity 32 in the base of which are formed a pair of diametrically opposite cylindrical depressions '34.
- the threaded shank 10 and a plain flattened button head, designated 36 are 3
- the screw is its shank 10 in the opening 26, whereupon the plain head 36 of the screw seats uponthe upper surface of the bed 24.
- the head 30 of the punch press is lowered through the position shown in FIG. 1 to that of FIG. 2.
- the plain head 36 nests snugly in the cavity 32, and the depressions 34. are aligned respectively with the punch bars 28.
- a tool for applying the sgrew is generally designated 38,
- the tool comprises a main body 40,.the lower end of which is pro- 2 vided with a cavity .42 and a pair of diametrically opn which is to be secured together by the screw comprises; for, example, mutually overlying plates 48 and 50.
- positedepressions 44 and the upper end of which is provided with a handle 46.
- the work work is provided with a tapped opening 52.
- the shank 10 of the screw isthreaded into'the opening 52.until the undersurface 14 of the head"12 engages the plate 50,
- the head 12 nests f-erring particularly to FIG. 7, it will be noted thatthe upper end surfaces of pins. 22 are flushand merge smoothly with the upper surface 16 of the screw head 12.
- a modified form of the non-removable screw comprises a threaded shank 'and a head, generally designated 62, having an axially .55 tapered undersurface 64, a flat top surface 66, and a cylindrical peripheral edge 68. 1
- the bed of a punch press is provided with a cylinand sfirmly lodged in openings respectively are a pair of pins 72.
- the lower end portion of each pin occupies the upper portion of its opening 70, and the upper end portion of the pin extends upwardly out of thehead 62, as shown.
- bed of a punch press is provided with a cylindrical opening 76 terminating at its upper end in an axially tapered portion 78 and a cylindrical portion 79, and on diametrically opposite sides of the opening 76 respectively are.
- a pair of axiallyshiftable punch bars-.80 provided with beveled ends 82.
- Thehead of the punch press is-provided with a pair of laterally spaced depressions 86.
- the threaded shank 60 and a plain countersunk head, generally designated 88 are formed in conventional manner. Then the screw is mounted upon the bed 74 of the punch press by inserting its shank 60 intheopening 76, whereuponthe plain countersunk head 88of the screw seats in the mouth 78 of the opening 76 with its upper surface 66 flush with the surfaceof the bed 74. Now the head 84 of thepunch press is lowered through the position of FIG. 8 to that of FIG. 9, whereupon 'thepunch bars 80 are actuated thereby to punch-shear from the plain countersunk head 88 the pins 72, leaving in the head 62 the openings 70. Thelower end portions of the pins 72 remain in the openings 70' while the upper, end portions of the pins 72 are projected into'the depressions 86 in the undersurface of the head 84 of the punch press, as shown.
- the tool for applying the modified screw is generally designated 90.
- the tool comprises a main body 92, thelower' end of which is provided with'a cavity 94 and a pair of diametrically opposite depressions 96, and the upper end of which is provided with a handle 98.
- the work which is to be secured together by the modified'screw comprises, for example, mutually overlying plates 100 and 102.
- Thework issp-rovided with .a-tapped opening used to turn the screw tight and to drive the pins down I into the head of the screw. .Wh'en the pins are driven in,
- the tool is then raised to disengage the pins 72 fromthe depressions 96 and turned to place the depressions 96, out of alignment with the pins 72, whereupon a harinherfis'applied to the upper end of tool 90 to drive the pins 72 back intothe head 62 of the screw, asjshown in'FIG. 13.
- a harinherfis'applied to the upper end of tool 90 to drive the pins 72 back intothe head 62 of the screw asjshown in'FIG. 13.
- "It will be noted that the pins 72 fully occupy the openings 70, vand referring particularly to FIG. 14, it will be observedv that the upper end'surfaces of the pins'72 are flush and-merge with theupper. surface 66 ofthe screw head 62.
- Screws made in accordancewith the invention are s engagedrespectively in the depressions 96, as shown. 2
- Vega suitably treated drill rod or heat treatable stainless steel
- a mild steel of medium carbon content may be Chromized; to make a chromium carbide surface which (381111011136 penetrated except by a diamond wheel.
- Other metals, suchas titanium, may beused.
- the screw is trulynon-removable, except by a cutting I torchor the like.
- the screw may be fashioned from a low carbon SAE 1010 steel-and then case' hardened in cyanide or ammonia to get a deep .hardskin' which is impenetrable except by, v
- each of the pins is "uniform in transverse sectionand a pairofthe pins are disposed respectively upon opposite sides fof the.
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Perforating, Stamping-Out Or Severing By Means Other Than Cutting (AREA)
Description
y 26, 1954 J. K. BARRY NON-REMOVABLE SCREW Filed Oct. 9, 1961 FIG. 3
INVENTOR. Jb/iil )Z'Barzy,
1816'; B BB 30 32 FIG-3'; 1 a0 j 3,134,291 i i NON-REMOVABLE SCREW John K. Barry, Springfield, Pa., assignor to South Chester Corporation, Lester, P'a., a corporation of Delaware Filed ct. 9, 1961, Ser. No. 143,953
2 Claims. (Cl. 85-45) I ,This invention relates generally to nonremovable screws, and particularly to a type of nonremovable screw used to permanently fasten together parts to prevent disconnection thereof by unauthorized persons. 1
A principal object of the invention is to provide a.
screw which not only may be used to prevent such tampering as may be attempted by honest people, with a knife, coin, etc., as whensouvenir hunting, butwhichalso may be used in the, construction of jails, institutions for mental cases, safes, etc. J 7
.Another object is to provide such a screw with a head that cannot be sawed, chiseled, and drilled toform a slot or hole to receive a tool for removingthe screw.
, Another object is to provide such a screw which may be'installed quickly and at minimum cost, and which, when installed, presents a smooth, attractive head without any necessity for a grinding or any other secondary operation. H e
Other objects ofthe invention will'become apparent whenthe" following description is read with reference to the accompaying drawing, in which: I
' FIG. 1 is a section through a punch. press, showing the press about to close on a flattened button head screw;
FIG. 2 is'similar to FIG. 1, but shows the condition of parts after the punching operation; 7
J'- FIG. 3 is a perspective viewpf the fully formed screw;
FIG. 4 isa perspectiveview looking atthe lower end of a tool used til-apply thescrewj v FIG. 5 is a section'showing the tool applying the screw tothe work; t
FIG. 6 is similar to FIG. 5, but shows the final stage in the application of the screw to the work; I 7 FIG. 7 is a perspective view showing the screw applied tothework; M 1
FIG. 8 is a section through a punchpress showing the press. about to close on a countersunk head. screw; FIG. 2 is similar to'FIG. 8, but shows the condition of partsfaf ter the" punching operation; l
FIG. 10 is a perspective view'of the fully formed screw shown in FI G@9; V
FIG. v1'1 is a perspective'vicw looking at the lower end of a tool used to apply the countersunk head screw;
FIG. 12 is a section showing the tool applying the countersunk head screw to the work;
FIG. 13 is similar to FIG. 12, but shows the final stage in the application of the countersunk head screw to the work; *and e -FIG.14 is a perspective view showing the countersunk head screw applied to the work.
Referring particularly to FIG. 3, a nonremovable I punch bars 28 having square cut working ends.
formed in conventional manner. mounted upon the bed 24 of the punch press by inserting 3,134,291 Patented May 26,, 1964 drical opening 26, and on diametrically opposite sides of the opening 26 respectively are a pair of axially shiftable The head of the punch press, generally designated 30, is provided with a cavity 32 in the base of which are formed a pair of diametrically opposite cylindrical depressions '34. In the manufacture of the'screw, the threaded shank 10 and a plain flattened button head, designated 36, are 3 Then the screw is its shank 10 in the opening 26, whereupon the plain head 36 of the screw seats uponthe upper surface of the bed 24. Now the head 30 of the punch press is lowered through the position shown in FIG. 1 to that of FIG. 2. The plain head 36 nests snugly in the cavity 32, and the depressions 34. are aligned respectively with the punch bars 28. When the punch bars are actuated,
they punch-shear from the plain head 36 the pins 22, leaving in the head 36 .the openings20. The lower end portions of the pins 22 remain in the openings 20 while the upper end portions of the pins 22 are projected into the depressions 34 in the base of the cavity 32, as
shown.)
A Referring particularly to FIGS. 4, 5, and 6, a tool for applying the sgrew is generally designated 38, The tool comprises a main body 40,.the lower end of which is pro- 2 vided with a cavity .42 and a pair of diametrically opn which is to be secured together by the screw comprises; for, example, mutually overlying plates 48 and 50. The
Referring particularly to FIGS. .5, 6, and 7, the work work is provided with a tapped opening 52. The shank 10 of the screw isthreaded into'the opening 52.until the undersurface 14 of the head"12 engages the plate 50,
. whereupon the lower end of the tool 38 is' applied to r 12 ofthe screw, as shown in FIG. '6.
' the. head-.12, as shown in FIG. 5. The head 12 nests f-erring particularly to FIG. 7, it will be noted thatthe upper end surfaces of pins. 22 are flushand merge smoothly with the upper surface 16 of the screw head 12.
Referring now particularly to FIG. 10, a modified form of the non-removable screw comprises a threaded shank 'and a head, generally designated 62, having an axially .55 tapered undersurface 64, a flat top surface 66, and a cylindrical peripheral edge 68. 1
Formed in the head 62 are a pair of axially extending diametrically opposite cylindrical through openings 70,
screw constructed in. accordance with the invention com-' "the upperiportion of its opening 20, and the upper end 'portion'of the pin extends upwardly out of the head 12, as shown;
Referring particularly toFIG. 1, the bed of a punch press, generally designated 5 24, is provided with a cylinand sfirmly lodged in openings respectively are a pair of pins 72. The lower end portion of each pin occupies the upper portion of its opening 70, and the upper end portion of the pin extends upwardly out of thehead 62, as shown.
Referring particularly to FIG. 8, bed of a punch press, generally designated 74, is provided with a cylindrical opening 76 terminating at its upper end in an axially tapered portion 78 anda cylindrical portion 79, and on diametrically opposite sides of the opening 76 respectively are. a pair of axiallyshiftable punch bars-.80 provided with beveled ends 82. Thehead of the punch press, generally designated 84, is-provided with a pair of laterally spaced depressions 86.
Injthe manufacture of the screw, the threaded shank 60 and a plain countersunk head, generally designated 88, are formed in conventional manner. Then the screw is mounted upon the bed 74 of the punch press by inserting its shank 60 intheopening 76, whereuponthe plain countersunk head 88of the screw seats in the mouth 78 of the opening 76 with its upper surface 66 flush with the surfaceof the bed 74. Now the head 84 of thepunch press is lowered through the position of FIG. 8 to that of FIG. 9, whereupon 'thepunch bars 80 are actuated thereby to punch-shear from the plain countersunk head 88 the pins 72, leaving in the head 62 the openings 70. Thelower end portions of the pins 72 remain in the openings 70' while the upper, end portions of the pins 72 are projected into'the depressions 86 in the undersurface of the head 84 of the punch press, as shown.
.-Referring particularly to FIGS. 11, 12, and 13', the tool for applying the modified screw is generally designated 90. The tool comprisesa main body 92, thelower' end of which is provided with'a cavity 94 and a pair of diametrically opposite depressions 96, and the upper end of which is provided with a handle 98.
Referring particularly to FIGS. 12, 13, and 14, the work which is to be secured together by the modified'screw comprises, for example, mutually overlying plates 100 and 102. .Thework issp-rovided with .a-tapped opening used to turn the screw tight and to drive the pins down I into the head of the screw. .Wh'en the pins are driven in,
104 terminating at its upper end inan axially tapered mouthl06; The shank 60 of the screwis threaded into the opening 104 until the head of the screw nests in the axially tapered mouth 106 of the opening 104, where-I uponrth'e lower end ,ofthe tool 90is applied to the head 62, as shown inFIG/lZ. Thehead 62 nests snugly in thecavity 94 with the upper end portions of the pins 72 Nowthe tool is turned approximately 90 to tighten the screw. The tool is then raised to disengage the pins 72 fromthe depressions 96 and turned to place the depressions 96, out of alignment with the pins 72, whereupon a harinherfis'applied to the upper end of tool 90 to drive the pins 72 back intothe head 62 of the screw, asjshown in'FIG. 13. "It will be noted that the pins 72 fully occupy the openings 70, vand referring particularly to FIG. 14, it will be observedv that the upper end'surfaces of the pins'72 are flush and-merge with theupper. surface 66 ofthe screw head 62.
Screws made in accordancewith the invention are s engagedrespectively in the depressions 96, as shown. 2
steel, for example, Vega, suitably treated drill rod or heat treatable stainless steel may be used. A mild steel of medium carbon content may be Chromized; to make a chromium carbide surface which (381111011136 penetrated except by a diamond wheel. Other metals, suchas titanium, may beused. v a
' It will be observed that one and the same tool may be the ends thereof are'flush and merge smoothly with the top surface of the screw head without requiring a grinding or any other secondary operation. Installation costs are held ,to a minimum. 'The head of the screw cannot be sawed, chiseled, or drilled-forforming a slot, groove,
or opening to receive a tool applied to remove the screw.
The screw is trulynon-removable, except bya cutting I torchor the like.
It will be understood, of course, that the present invention, asdescribed andshown, is susceptible to various changes and modifications which may be made without any departure from the general principles or real spiritof the invention. Accordingly, it is intended to claim the present invention broadly, as well asspecifically, as indicated in the appended claims.
Having thus described'my invention, I claim as follows;
1. In a non-removable screw, aunitary assembly'co m prising a threaded shank, a headformed integral with said shank and of a diameter substantially greater than the diameterof said shank, and a plurality of pins each punchsheared from the part of said head overhanging said shank, and each lodged-firmly'in a through opening.
formedin said head by said punch-shearing, with approxi mately one-third the length ofthe pin projecting up.- Wardly out of said opening, said pinbeing adapted'for being driven back into said opening and disposed with the opposte ends thereof respectively flush with the-top and bottom surfaces ofsaid head, said assembly in all its parts being made of hardened metal substantially fashioned'from hardenablesteel, andafter they are other wise fully formed, they are suitably hardened (to Rockwell reading in the order of-C-). For example, the screw may be fashioned from a low carbon SAE 1010 steel-and then case' hardened in cyanide or ammonia to get a deep .hardskin' which is impenetrable except by, v
grindingor burningwith a cutting torch. Instead, atool immune to being sawed,chiseled or drilled.
2. The screw defined in claim 1 wherein each of the pins is "uniform in transverse sectionand a pairofthe pins are disposed respectively upon opposite sides fof the.
2,462,199 Kehoe Feb.f22, 1949
Claims (1)
1. IN A NON-REMOVABLE SCREW, A UNITARY ASSEMBLY COMPRISING A THREADED SHANK, A HEAD FORMED INTEGRAL WITH SAID SHANK AND OF A DIAMETER SUBSTANTIALLY GREATER THAN THE DIAMETER OF SAID SHANK, AND A PLURALITY OF PINS EACH PUNCHSHEARED FROM THE PART OF SAID HEAD OVERHANGING SAID SHANK, AND EACH LODGED FIRMLY IN A THROUGH OPENING FORMED IN SAID HEAD BY SAID PUNCH-SHEARING, WITH APPROXIMATELY ONE-THIRD THE LENGTH OF THE PIN PROJECTING UPWARDLY OUT OF SAID OPENING, SAID PIN BEING ADAPTED FOR BEING DRIVEN BACK INTO SAID OPENING AND DISPOSED WITH THE OPPOSITE ENDS THEREOF RESPECTIVELY FLUSH WITH THE TOP AND BOTTOM SURFACES OF SAID HEAD, SAID ASSEMBLY IN ALL ITS PARTS BEING MADE OF HARDENED METAL SUBSTANTIALLY IMMUNE TO BEING SAWED, CHISELED OR DRILLED.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US143953A US3134291A (en) | 1961-10-09 | 1961-10-09 | Non-removable screw |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US143953A US3134291A (en) | 1961-10-09 | 1961-10-09 | Non-removable screw |
Publications (1)
Publication Number | Publication Date |
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US3134291A true US3134291A (en) | 1964-05-26 |
Family
ID=22506421
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
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US143953A Expired - Lifetime US3134291A (en) | 1961-10-09 | 1961-10-09 | Non-removable screw |
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US (1) | US3134291A (en) |
Cited By (20)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3859888A (en) * | 1972-02-28 | 1975-01-14 | Jujiro Okada | Oval screw |
US4109691A (en) * | 1977-12-21 | 1978-08-29 | Wilson Floyd Leroy | Combination torque release screw and screw driver |
JPS54103454U (en) * | 1977-12-29 | 1979-07-20 | ||
JPS54172156U (en) * | 1978-05-24 | 1979-12-05 | ||
US4252037A (en) * | 1979-02-06 | 1981-02-24 | Raine Fred L | Plug wrench |
US4269088A (en) * | 1979-09-14 | 1981-05-26 | N-S-W Corporation | Wrench tools for castellated nuts |
US4809569A (en) * | 1987-12-30 | 1989-03-07 | Erb John C | Anti-theft system for articles secured by recessed socket head threaded fasteners |
US4938108A (en) * | 1983-01-23 | 1990-07-03 | Abraham Levy | Theft-resistant fastener system |
US5244328A (en) * | 1991-10-07 | 1993-09-14 | Higgins James A | Anti-splitting device |
US5265503A (en) * | 1992-02-04 | 1993-11-30 | Dolin Lee A | Lug nut and socket |
FR2724993A1 (en) * | 1994-09-27 | 1996-03-29 | Mecelec Ind | Non-slackening nut e.g. for public equipment |
US5664447A (en) * | 1994-10-03 | 1997-09-09 | Neeley; Rocky E. | Valve lockout |
US5950462A (en) * | 1994-10-03 | 1999-09-14 | Neelchine Engineering, Inc. | Lockout device |
US6038893A (en) * | 1994-10-03 | 2000-03-21 | Neelchine Engineering, Inc. | Lockout device |
US6070442A (en) * | 1994-10-03 | 2000-06-06 | Neelchine Engineering, Inc. | Lockout device |
US6382001B1 (en) | 1994-10-03 | 2002-05-07 | Neelchine Engineering, Inc. | Keyless lock for lockout device |
US20030223841A1 (en) * | 2002-05-31 | 2003-12-04 | Voith Paper Patent Gmbh | Process for the releasable attachment of wearing parts in devices for treating suspended fiber stock |
US20040228703A1 (en) * | 2003-05-13 | 2004-11-18 | Simon Such | One way threaded security fastener and installation tool |
US20060104742A1 (en) * | 2004-11-12 | 2006-05-18 | Fleming David T | Stud for parts assembly |
US20080099071A1 (en) * | 2006-10-27 | 2008-05-01 | Paul Engdahl | Ball seat leveler |
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US221729A (en) * | 1879-11-18 | Improvement in screw-nails | ||
US1184173A (en) * | 1916-02-12 | 1916-05-23 | Adam J Gehring | Wood-screw. |
US1261916A (en) * | 1913-02-27 | 1918-04-09 | Walter Scott Forbes | Non-removable screw. |
US2054245A (en) * | 1932-07-14 | 1936-09-15 | Norman W Cummins | Method of making a cup |
US2201067A (en) * | 1939-02-09 | 1940-05-14 | Republic Steel Corp | Method of making metal articles with handles |
US2462199A (en) * | 1944-04-14 | 1949-02-22 | Westinghouse Electric Corp | Method of resistance welding using partially sheared out projections |
-
1961
- 1961-10-09 US US143953A patent/US3134291A/en not_active Expired - Lifetime
Patent Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US221729A (en) * | 1879-11-18 | Improvement in screw-nails | ||
US1261916A (en) * | 1913-02-27 | 1918-04-09 | Walter Scott Forbes | Non-removable screw. |
US1184173A (en) * | 1916-02-12 | 1916-05-23 | Adam J Gehring | Wood-screw. |
US2054245A (en) * | 1932-07-14 | 1936-09-15 | Norman W Cummins | Method of making a cup |
US2201067A (en) * | 1939-02-09 | 1940-05-14 | Republic Steel Corp | Method of making metal articles with handles |
US2462199A (en) * | 1944-04-14 | 1949-02-22 | Westinghouse Electric Corp | Method of resistance welding using partially sheared out projections |
Cited By (25)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3859888A (en) * | 1972-02-28 | 1975-01-14 | Jujiro Okada | Oval screw |
US4109691A (en) * | 1977-12-21 | 1978-08-29 | Wilson Floyd Leroy | Combination torque release screw and screw driver |
JPS54103454U (en) * | 1977-12-29 | 1979-07-20 | ||
JPS5626094Y2 (en) * | 1977-12-29 | 1981-06-20 | ||
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US6209365B1 (en) | 1994-10-03 | 2001-04-03 | Neelchine Engineering, Inc. | Lockout device |
US6324877B2 (en) | 1994-10-03 | 2001-12-04 | Neelchine Engineering, Inc. | Lockout device |
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US20030223841A1 (en) * | 2002-05-31 | 2003-12-04 | Voith Paper Patent Gmbh | Process for the releasable attachment of wearing parts in devices for treating suspended fiber stock |
US20040228703A1 (en) * | 2003-05-13 | 2004-11-18 | Simon Such | One way threaded security fastener and installation tool |
US20060104742A1 (en) * | 2004-11-12 | 2006-05-18 | Fleming David T | Stud for parts assembly |
US20080099071A1 (en) * | 2006-10-27 | 2008-05-01 | Paul Engdahl | Ball seat leveler |
US7650901B2 (en) * | 2006-10-27 | 2010-01-26 | Paul Engdahl | Ball seat leveler |
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