US3592100A - Binding screw having electrically insulated head - Google Patents

Binding screw having electrically insulated head Download PDF

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US3592100A
US3592100A US727939A US3592100DA US3592100A US 3592100 A US3592100 A US 3592100A US 727939 A US727939 A US 727939A US 3592100D A US3592100D A US 3592100DA US 3592100 A US3592100 A US 3592100A
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Prior art keywords
head
screw
plastic
binding
blank
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US727939A
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Czeslaw Mackiewicz
James E Meehan
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Hubbell Inc
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Harvey Hubbell Inc
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Assigned to HUBBELL INCORPORATED reassignment HUBBELL INCORPORATED CHANGE OF NAME (SEE DOCUMENT FOR DETAILS). EFFECTIVE DATE MAY 9, 1986 Assignors: HARVEY HUBBELL, INCORPORATED
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    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
    • H01R4/00—Electrically-conductive connections between two or more conductive members in direct contact, i.e. touching one another; Means for effecting or maintaining such contact; Electrically-conductive connections having two or more spaced connecting locations for conductors and using contact members penetrating insulation
    • H01R4/70—Insulation of connections
    • 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
    • F16B33/00—Features common to bolt and nut
    • F16B33/004—Sealing; Insulation
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
    • H01R4/00—Electrically-conductive connections between two or more conductive members in direct contact, i.e. touching one another; Means for effecting or maintaining such contact; Electrically-conductive connections having two or more spaced connecting locations for conductors and using contact members penetrating insulation
    • H01R4/28—Clamped connections, spring connections
    • H01R4/30—Clamped connections, spring connections utilising a screw or nut clamping member
    • 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
    • Y10S411/90—Fastener or fastener element composed of plural different materials
    • Y10S411/901—Core and exterior of different materials
    • Y10S411/902—Metal core
    • Y10S411/903—Resinous exterior
    • 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
    • Y10S411/904—Fastener or fastener element composed of nonmetallic material
    • Y10S411/908—Resinous material
    • 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
    • Y10S411/914—Coated bolt

Definitions

  • ABSTRACT A binding acrew having a threaded shank and an enlarged head coated with a plastic insulating material.
  • the head includes a usual slot which is cut through the insulating material exposing the base metal.
  • This invention relates to a binding screw and a method of making the same and, more particularly, to such a screw having a layer of plastic insulation material deposited upon its head. This invention further relates to the use of insulated head binding screws with grouped switches to prevent arcing between adjacent screwheads.
  • Another object of this invention is to provide a binding screw having a layer of plastic insulating material deposited upon its head and having the base metal material exposed in the slot.
  • a further object is to provide a plurality of grouped switches with the binding head screw described in the above paragraphs.
  • a binding screw having a threaded shank with an enlarged electrically insulated slotted head at one end.
  • the head includes a layer of plastic insulation material surrounding the metal head of the screw and the slot extends through the layer of plastic insulation material and into the metal head to expose the base metal of the head.
  • FIG. 1 is a front elevational view of an outlet box with the cover removed housing a series of grouped AC switches having binding head screws constructed in accordance with this invention
  • FIG. 2 is a perspective view of a screw blank with a coated head
  • FIG. 3 is a perspective view of the screw blank of FIG. 2 in which a shank has been threaded;
  • FIG. 4 is a perspective view similar to that of FIGS. 2 and 3 in which the head has been slotted;
  • FIG. 5 is a side elevational view partly in section showing a binding head screw constructed in accordance with the invention.
  • FIG. 6 is a schematic side elevational view of a holding rack of screw blanks positioned above a trough of coating material DESCRIPTION OF THE PREFERRED EMBODIMENT
  • a plurality of AC switches 10 mounted in an outlet box 12 upon mounting lugs 14.
  • Each switch includes a cover 16 made of a plastic insulating material, a toggle l8, and a plurality of laterally outwardly extending binding screws 20.
  • a mounting strap 22 carrying securing screws 24 retains each switch in position in the outlet box upon the mounting lugs. The lateral position of each binding screw 20 is determined by the size lead captured thereby when the lead is secured by the head.
  • the heads of the bind ing screws of adjacent switches may be extremely close together and in fact may be in direct contact.
  • the binding screws 20 have been formed to eliminate the conventional exposed live metal parts of these screws.
  • the novel binding screw 20 of this invention is clearly illustrated in FIGS. 4 and 5.
  • This screw includes a metallic threaded shank 26 having an enlarged metallic head 28 at one end.
  • a layer of synthetic plastic insulating material 30, such as nylon, is bonded to the top and sides of head 28 and a slot 32 is formed through the plastic layer 30 into the head 28 (see FIG. 5).
  • the dielectric coating material has been selected to be hard enough to allow it to be machined in the slotting operation without hurting while also being resilient enough to prevent chipping and cracking.
  • the design of this novel binding screw 20 relies on a dielectric coating thickness of at least 0.010 inch to provide adequate insulation. It has been determined that when binding screws constructed in accordance with this invention are positioned with their heads touching one another (i.e.
  • the screwheads 28 may be coated after slotting, this has been found to be disadvantageous for several reasons.
  • the screwdriver will often cut through the insulation in the slot and tear out sections of insulation in the slot and on the top surface of the head.
  • the coated slot generally does not have flat walls to transmit applied torque from a screwdriver which has a tendency to slip out of the slot.
  • the resilient insulating material in the slot presents a plastic cushion between the screw and the screwdriver which results in an uncertain feeling when tightening the screw.
  • the slot does not coat uniformly giving a poor appearance to the finished article.
  • the novel binding screws 20 illustrated in FIGS. 4 and 5 overcome the above disadvantages with the base metal material exposed in the slot thus eliminating the false sense of security which might be associated with a totally coated head.
  • the binding screws 20 of this invention are formed by heading a usual screw blank 34, loading a plurality of blanks 34 in a holding rack 36 (note FIG. 6), heating the screw blanks and immersing the heads of the blanks into a trough 28 of suitable insulating material 40 which may be in the form of an airagitated fluidized bed of nylon powder or a liquefied plastic.
  • Holding rack 36 is moved downwardly to allow only the head of the blank to be immersed in the insulating material.
  • the immersed heated screwheads melt the nylon particles or react with the liquefied plastic so that a layer of plastic insulation is firmly adhered to and is built up upon the screw blanks.
  • the thickness of the layer is controlled by the temperature of the blanks as well as the length of immersion time.
  • the coated screw blank 42 (note FIG. 2) is removed from the holding rack 36 and may be transferred to a threading apparatus where a thread 26 is rolled upon its shank in a known manner. it then may be slotted as at 22 to form the finished article (note H68. 4 and 5).
  • a binding screw comprising: a threaded metallic shank; an enlarged metallic head integrally formed with said shank at one end thereof, said head having a top and sides; a relatively thin layer of plastic electrical insulation material secured to and surrounding the top and sides of said head; and a transverse slot extending through said layer of plastic insulation material into said head, thereby exposing the base metal of said metallic head throughout the sidewalls of said slot.
  • a method of forming a binding screw comprising the steps of: forming a head screw blank; heating the blank; immersing the heated head in a mass of plastic insulation material for a predetermined time thereby bonding the insulation material to the head and building up an insulation layer of desired thickness; removing the coated blank from the mass of insulation material; threading the shank of the screw blank; and slotting the head of the screw blank through the insulation layer and into the metal head.

Abstract

A binding screw having a threaded shank and an enlarged head coated with a plastic insulating material. The head includes a usual slot which is cut through the insulating material exposing the base metal.

Description

United States Patent [72] Inventors Cuslaw Mncl lewlcz Trumbull; James E. Meehan. Bridgeport, both 01, Conn. 211 App]. No 121.939 [221 Filed May 9, 1968 [45] Patented July [3, 1971 [73] Auignee Ihrvey l-lubbell, Incorporated lrldgepurt, Conn.
[54] BINDING SCREW HAVING ELECTRICALLY INSULATED HEAD 5 Claims, 6 Drawing Flgz.
(52] U.S.CI. 85/1, lO/IO. l0/27, 85/9, 1I7/2l, 117/113, lI7/l28.4, 174/54. 200/ I 53 [51] Int. Cl ..F16b 23/00, Fl 6b 35/00 [50) run-rm 85/1C,
NH. 1 JP, 9, 1,54, 37,45; l5l/38,7; 10/10, 27 P, 27.5.3; 117/21, 3, 116?, 128.4, I27, 132C, 23033,4; l74/l66, I93, 54, 58
[S6] Relerenees Clted UNITED STATES PATENTS 268,697 12/1882 Lewis .1 85/54 UX 1,717,388 6/1929 KeeIerW 10/10 2,145,744 1/1939 Whitneyum 4 85/9 UX 2,191,171 2/1940 Leeetal 174/166 2,326,455 8/1943 Gray .4 85/37 2,724,303 11/1955 l-lolcomb.... 85/10 2.844.489 7/1958 Gemmer 117/21 X 2,981,651 4/1961 Arnold 117/21 X OTHER REFERENCES MATERIALS IN DESIGN ENGINEERING, February, 1960, pp. 91- 95,copy available in I I7 21.
Primary Examiner- Ramon S. Britts Anorney- Wooster, Davis & Cifelli ABSTRACT: A binding acrew having a threaded shank and an enlarged head coated with a plastic insulating material. The head includes a usual slot which is cut through the insulating material exposing the base metal.
BINDING SCREW HAVING ELECTRICALLY INSULATED HEAD BACKGROUND OF THE INVENTION This invention relates to a binding screw and a method of making the same and, more particularly, to such a screw having a layer of plastic insulation material deposited upon its head. This invention further relates to the use of insulated head binding screws with grouped switches to prevent arcing between adjacent screwheads.
It is common to group switches in an outlet box for conveniently providing a group of AC switches at a single location. However, when high-voltage circuits, for example, 20 a. 277/480 v. AC, are controlled by the switches a potentially hazardous condition exists in the outlet box. The usu =.l laterally outwardly extending binding screws of each of the closely mounted switches present exposed live metal parts across which arcing may occur when a 700 volt potential exists between adjacent binding screws. To prevent this condition, the National Electrical Code provides in part that: "Snap switches shall not be grouped or ganged in outlet boxes unle s they can be so arranged that the voltage between exposed live metal parts of adjacent switches does not exceed 300 volts.
One solution to the problem of grouping AC switches in high voltage circuits has been to eliminate the binding screws altogether and to back wire current-carrying leads to the switch bodies. The leads may be captured by suitable internal spring clips in a known manner. However, these clips often lose their resilience and become unreliable. Therefore, it would be desirable to retain the positive mechanical securing action of a binding screw of either a back-wired switch or a binding-head type while ensuring that no arcing will occur between adjacent switches when closely mounted in an outlet box.
SUMMARY OF THE INVENTION Accordingly, it is a primary object of this invention to provide a binding screw with an electrically insulated head and a method ol'forming the same.
Another object of this invention is to provide a binding screw having a layer of plastic insulating material deposited upon its head and having the base metal material exposed in the slot.
A further object is to provide a plurality of grouped switches with the binding head screw described in the above paragraphs.
To accomplish the primary object, in one form, there is provided a binding screw having a threaded shank with an enlarged electrically insulated slotted head at one end. The head includes a layer of plastic insulation material surrounding the metal head of the screw and the slot extends through the layer of plastic insulation material and into the metal head to expose the base metal of the head.
BRIEF DESCRIPTION OF THE DRAWING Other objects and further details of that which is believed to be novel and the present invention will be clear from the following description and claims taken with the accompanying drawing wherein:
FIG. 1 is a front elevational view of an outlet box with the cover removed housing a series of grouped AC switches having binding head screws constructed in accordance with this invention;
FIG. 2 is a perspective view of a screw blank with a coated head;
FIG. 3 is a perspective view of the screw blank of FIG. 2 in which a shank has been threaded;
FIG. 4 is a perspective view similar to that of FIGS. 2 and 3 in which the head has been slotted;
FIG. 5 is a side elevational view partly in section showing a binding head screw constructed in accordance with the invention;and
FIG. 6 is a schematic side elevational view of a holding rack of screw blanks positioned above a trough of coating material DESCRIPTION OF THE PREFERRED EMBODIMENT With particular reference to the drawing there is illustrated in FIG. I a plurality of AC switches 10 mounted in an outlet box 12 upon mounting lugs 14. Each switch includes a cover 16 made of a plastic insulating material, a toggle l8, and a plurality of laterally outwardly extending binding screws 20. A mounting strap 22 carrying securing screws 24 retains each switch in position in the outlet box upon the mounting lugs. The lateral position of each binding screw 20 is determined by the size lead captured thereby when the lead is secured by the head. Therefore, it should be noted that the heads of the bind ing screws of adjacent switches may be extremely close together and in fact may be in direct contact. In order to satisfy the above-quoted requirement of the National Electrical Code the binding screws 20 have been formed to eliminate the conventional exposed live metal parts of these screws.
The novel binding screw 20 of this invention is clearly illustrated in FIGS. 4 and 5. This screw includes a metallic threaded shank 26 having an enlarged metallic head 28 at one end. A layer of synthetic plastic insulating material 30, such as nylon, is bonded to the top and sides of head 28 and a slot 32 is formed through the plastic layer 30 into the head 28 (see FIG. 5). The dielectric coating material has been selected to be hard enough to allow it to be machined in the slotting operation without hurting while also being resilient enough to prevent chipping and cracking. The design of this novel binding screw 20 relies on a dielectric coating thickness of at least 0.010 inch to provide adequate insulation. It has been determined that when binding screws constructed in accordance with this invention are positioned with their heads touching one another (i.e. having a total insulation thickness of 0.02 inch) they are able to withstand approximately 3,000 volts therebetween without breakdown of the dielectric. Therefore, it should be apparent that their use in 277/480 v. AC circuits is well within acceptable limits. It should also be pointed out that although these binding screws 20 have been developed to solve a particular problem-viz grouped AC switchesthey will find usage in a great number of applications where exposed live binding screws are present.
Although the screwheads 28 may be coated after slotting, this has been found to be disadvantageous for several reasons. First, the screwdriver will often cut through the insulation in the slot and tear out sections of insulation in the slot and on the top surface of the head. Second, the coated slot generally does not have flat walls to transmit applied torque from a screwdriver which has a tendency to slip out of the slot. Third, the resilient insulating material in the slot presents a plastic cushion between the screw and the screwdriver which results in an uncertain feeling when tightening the screw. Fourth, the slot does not coat uniformly giving a poor appearance to the finished article. Finally, there is no visual means of inspecting for adequate coat thickness. The novel binding screws 20 illustrated in FIGS. 4 and 5 overcome the above disadvantages with the base metal material exposed in the slot thus eliminating the false sense of security which might be associated with a totally coated head.
The binding screws 20 of this invention are formed by heading a usual screw blank 34, loading a plurality of blanks 34 in a holding rack 36 (note FIG. 6), heating the screw blanks and immersing the heads of the blanks into a trough 28 of suitable insulating material 40 which may be in the form of an airagitated fluidized bed of nylon powder or a liquefied plastic. Holding rack 36 is moved downwardly to allow only the head of the blank to be immersed in the insulating material. The immersed heated screwheads melt the nylon particles or react with the liquefied plastic so that a layer of plastic insulation is firmly adhered to and is built up upon the screw blanks. The thickness of the layer is controlled by the temperature of the blanks as well as the length of immersion time. The coated screw blank 42 (note FIG. 2) is removed from the holding rack 36 and may be transferred to a threading apparatus where a thread 26 is rolled upon its shank in a known manner. it then may be slotted as at 22 to form the finished article (note H68. 4 and 5).
It is believed that the many advantages of this invention will now be apparent to those skilled in the art. As set forth in the objects above there is provided an inexpensive binding screw which may be used in high-voltage circuit AC switches, particularly those grouped in a common outlet box to prevent arcing between binding head screws of adjacent switches. Of course, the binding screw will find numerous applications in other environments.
It should be understood that the present disclosure has been made only by way of example and that numerous changes in details of construction and the combination and arrangement of parts may be resorted to without departing from the true spirit and scope of the invention as hereinafter claimed.
What we claim is:
l. A binding screw comprising: a threaded metallic shank; an enlarged metallic head integrally formed with said shank at one end thereof, said head having a top and sides; a relatively thin layer of plastic electrical insulation material secured to and surrounding the top and sides of said head; and a transverse slot extending through said layer of plastic insulation material into said head, thereby exposing the base metal of said metallic head throughout the sidewalls of said slot.
2. The binding screw defined in claim I wherein said layer of plastic insulation material is bonded to said head.
3. A method of forming a binding screw comprising the steps of: forming a head screw blank; heating the blank; immersing the heated head in a mass of plastic insulation material for a predetermined time thereby bonding the insulation material to the head and building up an insulation layer of desired thickness; removing the coated blank from the mass of insulation material; threading the shank of the screw blank; and slotting the head of the screw blank through the insulation layer and into the metal head.
4. The method of forming a binding screw as defined in claim 3 wherein said mass of plastic insulation is a fluidized bed of nylon particles formed by continuously agitating the nylon particles with an airblast passing therethrough.
5. The method of forming a binding screw as defined in claim 3 wherein said mass of plastic insulation is a bath of liquid plastic material.

Claims (5)

1. A binding screw comprising: a threaded metallic shank; an enlarged metallic head integrally formed with said shank at one end thereof, said head having a top and sides; a relatively thin layer of plastic electrical insulation material secured to and surrounding the top and sides of said head; and a transverse slot extending through said layer of plastic insulation material into said head, thereby exposing the base metal of said metallic head throughout the sidewalls of said slot.
2. The binding screw defined in claim 1 wherein said layer of plastic insulation material is bonded to said head.
3. A method of forming a binding screw comprising the steps of: forming a head screw blank; heating the blank; immersing the heated head in a mass of plastic insulation material for a predetermined time thereby bonding the insulation material to the head and building up an insulation layer of desired thickness; removing the coated blank from the mass of insulation material; threading the shank of the screw blank; and slotting the head of the screw blank through the insulation layer and into the metal head.
4. The method of forming a binding screw as defined in claim 3 wherein said mass of plastic insulation is a fluidized bed of nylon particles formed by continuously agitating the nylon particles with an airblast passing therethrough.
5. The method of forming a binding screw as defined in claim 3 wherein said mass of plastic insulation is a bath of liquid plastic material.
US727939A 1968-05-09 1968-05-09 Binding screw having electrically insulated head Expired - Lifetime US3592100A (en)

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Cited By (18)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4041834A (en) * 1976-08-24 1977-08-16 Illinois Tool Works Inc. Plastic headed fastener assembly
US4507035A (en) * 1983-11-18 1985-03-26 Roller Corporation Of America Impact resistant assembly
US4630168A (en) * 1985-12-16 1986-12-16 The Boeing Company Lightning protection fastener
US4631640A (en) * 1981-11-13 1986-12-23 Nippon Electric Co. Ltd. Portable radio device for protecting a radio circuit from static electricity
US4760493A (en) * 1985-09-30 1988-07-26 The Boeing Company Lightning protection system for composite material aircraft structures
US4813833A (en) * 1983-09-06 1989-03-21 Brock Manufacturing, Inc. Threaded fastener having jacketed head
EP0391023A1 (en) * 1989-04-03 1990-10-10 Textron Inc. Improvements in non-corrosive headed composite fasteners and a method of producing the same
US5122021A (en) * 1991-03-22 1992-06-16 The Fastron Corporation Encapsulated fastener and washer
US5360639A (en) * 1992-09-01 1994-11-01 Kenji Kawabata Method of providing a decorative pattern on a screw head
US5590495A (en) * 1995-07-06 1997-01-07 Bressler Group Inc. Solar roofing system
USD426146S (en) * 1998-12-28 2000-06-06 Plastic Specialties, L.L.C. Combined bolt and plastic cap
US6315485B1 (en) 1999-08-13 2001-11-13 Northrop Grumman Corporation Low observable aircraft fastener treatment
US6475094B1 (en) 1998-12-28 2002-11-05 Mark W. Bruns Method for making product and product having ultra high molecular weight plastic parts
US20050147485A1 (en) * 2003-06-30 2005-07-07 Strunk Jeffrey L. Self-filling fastener and method of making
US20070189877A1 (en) * 2006-02-13 2007-08-16 Stephen Wells Insulated fastener
US20100249871A1 (en) * 2009-03-24 2010-09-30 Medtronic, Inc. Full Visibility Lead Retention
US20100249869A1 (en) * 2009-03-24 2010-09-30 Medtronic, Inc. Lead Retention and Sealing Device
US20100249870A1 (en) * 2009-03-24 2010-09-30 Medtronic, Inc. Sealing Setscrew

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US2191171A (en) * 1937-08-28 1940-02-20 Line Material Co Insulator
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US2724303A (en) * 1950-03-29 1955-11-22 Robert L Holcomb Driver fastener having coating of elastic insulating material
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US2981651A (en) * 1956-08-02 1961-04-25 American Marietta Co Sealing members and methods

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US268697A (en) * 1882-12-05 Furniture-pad
US1717388A (en) * 1928-07-16 1929-06-18 Keeler Brass Co Method of making screws
US2145744A (en) * 1935-12-13 1939-01-31 Gen Motors Corp Terminal
US2191171A (en) * 1937-08-28 1940-02-20 Line Material Co Insulator
US2326455A (en) * 1942-03-13 1943-08-10 Glenn L Martin Co Fastening means
US2724303A (en) * 1950-03-29 1955-11-22 Robert L Holcomb Driver fastener having coating of elastic insulating material
US2981651A (en) * 1956-08-02 1961-04-25 American Marietta Co Sealing members and methods
US2844489A (en) * 1957-12-20 1958-07-22 Knapsack Ag Fluidized bed coating process

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Title
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Cited By (25)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4041834A (en) * 1976-08-24 1977-08-16 Illinois Tool Works Inc. Plastic headed fastener assembly
US4631640A (en) * 1981-11-13 1986-12-23 Nippon Electric Co. Ltd. Portable radio device for protecting a radio circuit from static electricity
US4813833A (en) * 1983-09-06 1989-03-21 Brock Manufacturing, Inc. Threaded fastener having jacketed head
US4507035A (en) * 1983-11-18 1985-03-26 Roller Corporation Of America Impact resistant assembly
US4760493A (en) * 1985-09-30 1988-07-26 The Boeing Company Lightning protection system for composite material aircraft structures
US4630168A (en) * 1985-12-16 1986-12-16 The Boeing Company Lightning protection fastener
EP0391023A1 (en) * 1989-04-03 1990-10-10 Textron Inc. Improvements in non-corrosive headed composite fasteners and a method of producing the same
US5122021A (en) * 1991-03-22 1992-06-16 The Fastron Corporation Encapsulated fastener and washer
US5360639A (en) * 1992-09-01 1994-11-01 Kenji Kawabata Method of providing a decorative pattern on a screw head
US5590495A (en) * 1995-07-06 1997-01-07 Bressler Group Inc. Solar roofing system
US5830779A (en) * 1995-07-06 1998-11-03 Bressler Group Inc. Method of making photovoltaic module
USD426146S (en) * 1998-12-28 2000-06-06 Plastic Specialties, L.L.C. Combined bolt and plastic cap
US6676351B1 (en) 1998-12-28 2004-01-13 Pride Solutions, Llc Product having ultra high molecular weight plastic parts
US6475094B1 (en) 1998-12-28 2002-11-05 Mark W. Bruns Method for making product and product having ultra high molecular weight plastic parts
US6315485B1 (en) 1999-08-13 2001-11-13 Northrop Grumman Corporation Low observable aircraft fastener treatment
US20050147485A1 (en) * 2003-06-30 2005-07-07 Strunk Jeffrey L. Self-filling fastener and method of making
WO2006033946A2 (en) * 2004-09-20 2006-03-30 Strunk Jeffrey L Self-filling fastener and method of making
WO2006033946A3 (en) * 2004-09-20 2006-07-06 Jeffrey L Strunk Self-filling fastener and method of making
US20070189877A1 (en) * 2006-02-13 2007-08-16 Stephen Wells Insulated fastener
US7744321B2 (en) * 2006-02-13 2010-06-29 Arris Group, Inc. Insulated fastener
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