US20120187127A1 - Threaded plastic plug for forced screwing - Google Patents

Threaded plastic plug for forced screwing Download PDF

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Publication number
US20120187127A1
US20120187127A1 US13/356,373 US201213356373A US2012187127A1 US 20120187127 A1 US20120187127 A1 US 20120187127A1 US 201213356373 A US201213356373 A US 201213356373A US 2012187127 A1 US2012187127 A1 US 2012187127A1
Authority
US
United States
Prior art keywords
plug
head
flange
cavity
thread
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.)
Abandoned
Application number
US13/356,373
Other languages
English (en)
Inventor
Davide LUPPI
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.)
POLYKAP Srl
Original Assignee
POLYKAP Srl
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by POLYKAP Srl filed Critical POLYKAP Srl
Assigned to POLYKAP S.R.L. reassignment POLYKAP S.R.L. ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: LUPPI, DAVIDE
Publication of US20120187127A1 publication Critical patent/US20120187127A1/en
Abandoned legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16B—DEVICES FOR FASTENING OR SECURING CONSTRUCTIONAL ELEMENTS OR MACHINE PARTS TOGETHER, e.g. NAILS, BOLTS, CIRCLIPS, CLAMPS, CLIPS OR WEDGES; JOINTS OR JOINTING
    • F16B33/00—Features common to bolt and nut
    • F16B33/006—Non-metallic fasteners using screw-thread
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
    • B65D39/00—Closures arranged within necks or pouring openings or in discharge apertures, e.g. stoppers
    • B65D39/08—Threaded or like closure members secured by rotation; Bushes therefor
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
    • B65D39/00—Closures arranged within necks or pouring openings or in discharge apertures, e.g. stoppers
    • B65D39/08—Threaded or like closure members secured by rotation; Bushes therefor
    • B65D39/082—Bung-rings and bungs for bung-holes
    • B65D39/088—Bungs with special means facilitating handling thereof
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
    • B65D59/00—Plugs, sleeves, caps, or like rigid or semi-rigid elements for protecting parts of articles or for bundling articles, e.g. protectors for screw-threads, end caps for tubes or for bundling rod-shaped articles
    • B65D59/02—Plugs
    • 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
    • F16B35/00—Screw-bolts; Stay-bolts; Screw-threaded studs; Screws; Set screws
    • F16B35/04—Screw-bolts; Stay-bolts; Screw-threaded studs; Screws; Set screws with specially-shaped head or shaft in order to fix the bolt on or in an object
    • F16B35/041—Specially-shaped shafts
    • F16B35/044—Specially-shaped ends
    • F16B35/047—Specially-shaped ends for preventing cross-threading, i.e. preventing skewing of bolt and nut
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01M—LUBRICATING OF MACHINES OR ENGINES IN GENERAL; LUBRICATING INTERNAL COMBUSTION ENGINES; CRANKCASE VENTILATING
    • F01M11/00—Component parts, details or accessories, not provided for in, or of interest apart from, groups F01M1/00 - F01M9/00
    • F01M11/04—Filling or draining lubricant of or from machines or engines
    • F01M11/0408—Sump drainage devices, e.g. valves, plugs
    • F01M2011/0416—Plugs
    • 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
    • F16B23/0007—Specially shaped nuts or heads of bolts or screws for rotations by a tool characterised by the shape of the recess or the protrusion engaging the tool
    • F16B23/0015—Specially shaped nuts or heads of bolts or screws for rotations by a tool characterised by the shape of the recess or the protrusion engaging the tool substantially rectangular, e.g. one-slot head
    • 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
    • F16B23/0007—Specially shaped nuts or heads of bolts or screws for rotations by a tool characterised by the shape of the recess or the protrusion engaging the tool
    • F16B23/0038—Specially shaped nuts or heads of bolts or screws for rotations by a tool characterised by the shape of the recess or the protrusion engaging the tool substantially prismatic with up to six edges, e.g. triangular, square, pentagonal, Allen-type cross-sections
    • 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
    • F16B23/0092—Specially shaped nuts or heads of bolts or screws for rotations by a tool with a head engageable by two or more different tools

Definitions

  • This invention relates to a threaded plastic plug for forced and facilitated screwing.
  • plugs made of plastic material, intended for industrial use, designed to be inserted with forced screwing and tightening in a hole of a generic recipient unit.
  • Such plugs are used for the most diverse purposes, including, for example, blocking holes, protecting them from any damage, covering them for functional or aesthetic reasons, making them airtight or watertight, marking them, hermetically sealing them, etc.
  • a prior art type of such plugs has an overall single-piece structure, having a longitudinal axis of symmetry. It basically has three identifiable fundamental parts: a body, a flange and a head, parts which are positioned one after another longitudinally relative to the axis of symmetry.
  • the plug body is substantially cylindrical, hollow inside, and has a profile wall in which an outer thread is made, this thread being designed to couple with a matching thread made in the hole which will receive the plug.
  • the flange is basically ring-shaped, and is interposed between the body and the head. It projects transversally to the axis of the plug relative to both the body and the head.
  • the flange is designed to make contact with a section of the surface of the unit surrounding the hole, applying a thrust action on it as a result of screwing, the thrust action being more intense the higher the tightening torque used for forced screwing of the plug into the hole.
  • the head has the shape of a tubular solid with a prismatic profile, extending over a short axial length, projecting from the opposite side of the flange to that from which the body projects.
  • the tubular solid has a large inner cavity which, laterally, is surrounded by a thick wall, having the shape of a closed ring and with even, constant thickness.
  • the inner cavity also has a closed end, formed by the flange.
  • a large opening located at the top of the tubular solid allows access from outside to the inner cavity of the plug head.
  • the head has various types of coupling surfaces on which to engage an operating tool for forced screwing or unscrewing of the plug.
  • first coupling surfaces are on the faces of the outer surface of the ring-shaped wall of the tubular solid; second coupling surfaces are in contrast provided by prominent protrusions contained in the cavity.
  • first outer surfaces are substantially at right angles to the plane in which the flange lies and are shaped and sized in such a way that they can be coupled with an operating tool consisting for example of a standardised, standard-production open-ended wrench or a socket wrench normally used for tightening steel bolts.
  • the second coupling surfaces which are in contrast provided by the parallel protrusions inside the cavity, instead together delimit an interposed slot or slit in which a further type of operating tool may be engaged, again of the standardised type for generic usage, in that case represented by a screwdriver which can engage in the slot so as to apply the force necessary for screwing/unscrewing the plug.
  • the plug is normally made of plastic material.
  • the operating tools of the standard type are in contrast made of high-strength steel and are sized in such a way that they can apply tightening torques whose intensity is suitable for tightening steel bolts fully home.
  • the intensity of the tightening torque must be very carefully modulated so as to always guarantee the correct compromise between plug tightening suitable for the specific functions required of it, and tightening which is not excessive and which is below a limit value which could cause permanent damage to the plug head; damage which is also contributed to by the non-eliminable circumferential play with which the operating tool engages with the first and/or with the second coupling surfaces previously defined.
  • the fitter may tend to tighten the plug in a cautious way, less than is necessary to guarantee for example optimum hole airtight or watertight sealing.
  • the main aim of the invention is to overcome said disadvantages by providing a plug shaped in such a way that it can receive a tightening torque which may even be very intense, without being subject to permanent deformations which would compromise the functionality of the plug or vice versa the correct nature of any subsequent plug removal operations which might be necessary.
  • the head of the plug is shaped in such a way that it has walls surrounding the head cavity which have a thickness that is increased at least close to the flange, as well as being located completely inside the head cavity in such a way as to avoid any limitation on the use of plug operating tools made in the standardised form.
  • Another aim of the invention is to allow the automatic and correct engagement of the body thread irrespective of the relative position with which the plug is presented to the receiving thread.
  • FIGS. 1 , 2 and 3 are respectively an elevation view, a top plan view and a side view of a plug made according to the invention
  • FIG. 4 is a perspective view showing the plug in its entirety
  • FIG. 5 is a cross-section of the plug in the plane of the line labelled A-A in FIG. 2 .
  • FIGS. 1 , 2 , 3 the numeral 1 denotes in its entirety a threaded plug 1 , intended to be inserted with forced screwing in a hole made in a generic receiving unit, not shown in the accompanying drawings.
  • the plug 1 preferably made of plastic material—basically comprises a single-piece structure, having a longitudinal axis 2 of symmetry, and formed by: a body 3 , a flange 4 and a head 5 , which are positioned in an orderly fashion one after another along the axis 2 , with the flange 4 interposed between the body 3 and the head 5 .
  • the body 3 [ FIGS.
  • the thread 6 is interposed between two smooth cylindrical collars 17 a and 17 b, one 17 a of which is adjacent to the flange 4 , while the other 17 b is made at one end of the body 3 far from the flange 4 .
  • the head 5 has the shape of a prismatic tubular solid 8 , with a polygonal profile, which in this particular case is hexagonal.
  • the tubular solid 8 extends longitudinally relative to the axis 2 of the plug 1 over a short length, projecting from the flange 4 on the opposite side of the flange to that from which the body 3 projects.
  • the tubular solid 8 has an inner cavity 7 which, laterally, is surrounded by a thick wall 9 , having the shape of a closed ring; and which is inferiorly delimited by a closed bottom surface 21 , formed by the flange 4 . At the top of the tubular solid 8 there is an opening 11 allowing access to the inner cavity 7 of the plug head 5 .
  • a lateral surface 9 e which is substantially at a right angle to the plane in which the flange 4 lies
  • an inner lateral surface 9 i correspondingly polygonal, which is oblique relative to the axis 2 of the cavity 7 , diverging from it in the direction of travel along the axis 2 from the body 3 to the head 5 of the plug 1 .
  • the thickness of the wall 9 is variable from a minimum located at the access opening 11 to the head 5 inner cavity 7 , to a maximum which in contrast is located at the zone where the tubular solid 9 is attached to the flange 4 .
  • the variation in the thickness is preferably continuous and linear and is fully obtained inside the cavity 7 . In that way, there is a noticeable increase in the strength of the wall 9 of the tubular solid 8 without thereby causing any modification of its outer lateral surface 9 e which may therefore be engaged correctly and without any limitation using operating tools of the standardised and standard type.
  • the presence of the cylindrical collar 17 b in the plug 1 means that for correct insertion and initial engagement of the thread 6 in the matching thread of the receiving hole, the fitter does not need to search for the start of the thread. In practice it is sufficient to begin screwing the plug 1 —whatever its condition—in order to make the thread automatically engage correctly, without any action by the fitter, after rotating the plug 1 about its own axis 2 at most through half a round angle.

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Closures For Containers (AREA)
  • Pressure Vessels And Lids Thereof (AREA)
  • Dowels (AREA)
  • Fishing Rods (AREA)
US13/356,373 2011-01-24 2012-01-23 Threaded plastic plug for forced screwing Abandoned US20120187127A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
IT000001U ITRN20110001U1 (it) 2011-01-24 2011-01-24 Tappo filettato in materiale plastico per avvitamento forzato e facilitato
ITRN2011U000001 2011-01-24

Publications (1)

Publication Number Publication Date
US20120187127A1 true US20120187127A1 (en) 2012-07-26

Family

ID=43975834

Family Applications (1)

Application Number Title Priority Date Filing Date
US13/356,373 Abandoned US20120187127A1 (en) 2011-01-24 2012-01-23 Threaded plastic plug for forced screwing

Country Status (6)

Country Link
US (1) US20120187127A1 (de)
EP (1) EP2479441B1 (de)
DK (1) DK2479441T3 (de)
ES (1) ES2767263T3 (de)
IT (1) ITRN20110001U1 (de)
PL (1) PL2479441T3 (de)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US9593792B1 (en) * 2012-10-10 2017-03-14 Michael E. Yoder Thread protectors

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102012025254A1 (de) 2012-12-21 2014-06-26 Helmholtz Zentrum München Deutsches Forschungszentrum Für Gesundheit Und Umwelt (Gmbh) Schraubröhrchen und Schraubdeckel für Biomaterial
DE102013015265B4 (de) * 2013-09-16 2020-07-02 Fass-Frisch Gmbh Schraubverschlussstopfen für Behälter
DE102016202692A1 (de) * 2016-02-22 2017-08-24 Mahle International Gmbh Verschlusssystem für einen Behälter

Citations (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2813450A (en) * 1954-05-03 1957-11-19 Dzus William Rotatable fastener having circular toothed tool receiving groove
US5302068A (en) * 1990-10-03 1994-04-12 Illinois Tool Works Inc. Fastener having recessed, non-circular head, and fastener-driving tool
US5547042A (en) * 1995-01-23 1996-08-20 Platt; Richard B. Crank case drain plug structure and method
US20020162407A1 (en) * 2001-05-07 2002-11-07 Scott Nightlinger Oil drainage structure for a combustion engine crank case or the like, and method for oil drainage
US20040045965A1 (en) * 2002-09-09 2004-03-11 Dwinell Davis B. Drum plug and seal
US6988432B2 (en) * 2003-11-06 2006-01-24 Uniscrew Worldwide, Inc. Multi-tiered-recess screws
US7066062B2 (en) * 2003-10-24 2006-06-27 Flesher Robert W Torque-setting, tamper-resistant fastener and method and tool for use with same
USD545404S1 (en) * 2005-04-20 2007-06-26 Scott Nightlinger Screw drain plug
US20080019795A1 (en) * 2006-07-18 2008-01-24 Skf Usa Inc. Composite drain plug
US20080128206A1 (en) * 2006-12-05 2008-06-05 Skf Usa Inc. Drain bolt
US7425112B2 (en) * 2003-04-29 2008-09-16 Nowak Jr Edmund A Tamper resistant screw
US20090020530A1 (en) * 2007-07-17 2009-01-22 Baughman Gary M Plastic plug with overcap

Patent Citations (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2813450A (en) * 1954-05-03 1957-11-19 Dzus William Rotatable fastener having circular toothed tool receiving groove
US5302068A (en) * 1990-10-03 1994-04-12 Illinois Tool Works Inc. Fastener having recessed, non-circular head, and fastener-driving tool
US5547042A (en) * 1995-01-23 1996-08-20 Platt; Richard B. Crank case drain plug structure and method
US20020162407A1 (en) * 2001-05-07 2002-11-07 Scott Nightlinger Oil drainage structure for a combustion engine crank case or the like, and method for oil drainage
US20040045965A1 (en) * 2002-09-09 2004-03-11 Dwinell Davis B. Drum plug and seal
US7425112B2 (en) * 2003-04-29 2008-09-16 Nowak Jr Edmund A Tamper resistant screw
US7066062B2 (en) * 2003-10-24 2006-06-27 Flesher Robert W Torque-setting, tamper-resistant fastener and method and tool for use with same
US6988432B2 (en) * 2003-11-06 2006-01-24 Uniscrew Worldwide, Inc. Multi-tiered-recess screws
USD545404S1 (en) * 2005-04-20 2007-06-26 Scott Nightlinger Screw drain plug
US20080019795A1 (en) * 2006-07-18 2008-01-24 Skf Usa Inc. Composite drain plug
US20080128206A1 (en) * 2006-12-05 2008-06-05 Skf Usa Inc. Drain bolt
US20090020530A1 (en) * 2007-07-17 2009-01-22 Baughman Gary M Plastic plug with overcap

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US9593792B1 (en) * 2012-10-10 2017-03-14 Michael E. Yoder Thread protectors

Also Published As

Publication number Publication date
DK2479441T3 (da) 2020-02-03
PL2479441T3 (pl) 2020-04-30
EP2479441A1 (de) 2012-07-25
ITRN20110001U1 (it) 2011-04-25
ES2767263T3 (es) 2020-06-17
EP2479441B1 (de) 2019-10-23

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Legal Events

Date Code Title Description
AS Assignment

Owner name: POLYKAP S.R.L., SAN MARINO

Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNOR:LUPPI, DAVIDE;REEL/FRAME:027601/0178

Effective date: 20111220

STCB Information on status: application discontinuation

Free format text: ABANDONED -- FAILURE TO RESPOND TO AN OFFICE ACTION