WO2003060334A1 - Dowel expanded in two places - Google Patents

Dowel expanded in two places Download PDF

Info

Publication number
WO2003060334A1
WO2003060334A1 PCT/IT2002/000343 IT0200343W WO03060334A1 WO 2003060334 A1 WO2003060334 A1 WO 2003060334A1 IT 0200343 W IT0200343 W IT 0200343W WO 03060334 A1 WO03060334 A1 WO 03060334A1
Authority
WO
WIPO (PCT)
Prior art keywords
improved mechanical
threaded portion
rod
connecting end
outer connecting
Prior art date
Application number
PCT/IT2002/000343
Other languages
French (fr)
Inventor
Dante Negrini
Original Assignee
Dante Negrini
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 Dante Negrini filed Critical Dante Negrini
Priority to AU2002314523A priority Critical patent/AU2002314523A1/en
Publication of WO2003060334A1 publication Critical patent/WO2003060334A1/en

Links

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
    • F16B13/00—Dowels or other devices fastened in walls or the like by inserting them in holes made therein for that purpose
    • F16B13/04—Dowels or other devices fastened in walls or the like by inserting them in holes made therein for that purpose with parts gripping in the hole or behind the reverse side of the wall after inserting from the front
    • F16B13/06—Dowels or other devices fastened in walls or the like by inserting them in holes made therein for that purpose with parts gripping in the hole or behind the reverse side of the wall after inserting from the front combined with expanding sleeve
    • F16B13/061—Dowels or other devices fastened in walls or the like by inserting them in holes made therein for that purpose with parts gripping in the hole or behind the reverse side of the wall after inserting from the front combined with expanding sleeve of the buckling type
    • 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
    • F16B9/00—Connections of rods or tubular parts to flat surfaces at an angle
    • F16B9/05—Connections of rods or tubular parts to flat surfaces at an angle by way of an intermediate member
    • F16B9/056—Connections of rods or tubular parts to flat surfaces at an angle by way of an intermediate member the intermediate member extending through the flat surface; the rod or tubular part extending through the flat surface
    • 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
    • F16B13/00—Dowels or other devices fastened in walls or the like by inserting them in holes made therein for that purpose
    • F16B13/04—Dowels or other devices fastened in walls or the like by inserting them in holes made therein for that purpose with parts gripping in the hole or behind the reverse side of the wall after inserting from the front
    • F16B13/06—Dowels or other devices fastened in walls or the like by inserting them in holes made therein for that purpose with parts gripping in the hole or behind the reverse side of the wall after inserting from the front combined with expanding sleeve
    • F16B13/063—Dowels or other devices fastened in walls or the like by inserting them in holes made therein for that purpose with parts gripping in the hole or behind the reverse side of the wall after inserting from the front combined with expanding sleeve by the use of an expander
    • F16B13/066—Dowels or other devices fastened in walls or the like by inserting them in holes made therein for that purpose with parts gripping in the hole or behind the reverse side of the wall after inserting from the front combined with expanding sleeve by the use of an expander fastened by extracting a separate expander-part, actuated by the screw, nail or the like
    • F16B13/068—Dowels or other devices fastened in walls or the like by inserting them in holes made therein for that purpose with parts gripping in the hole or behind the reverse side of the wall after inserting from the front combined with expanding sleeve by the use of an expander fastened by extracting a separate expander-part, actuated by the screw, nail or the like expanded in two or more places
    • 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
    • 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
    • F16B9/00—Connections of rods or tubular parts to flat surfaces at an angle
    • F16B9/05—Connections of rods or tubular parts to flat surfaces at an angle by way of an intermediate member
    • F16B9/054—Connections of rods or tubular parts to flat surfaces at an angle by way of an intermediate member the intermediate member being threaded
    • 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
    • F16B5/00—Joining sheets or plates, e.g. panels, to one another or to strips or bars parallel to them
    • F16B5/02—Joining sheets or plates, e.g. panels, to one another or to strips or bars parallel to them by means of fastening members using screw-thread
    • F16B5/0275—Joining sheets or plates, e.g. panels, to one another or to strips or bars parallel to them by means of fastening members using screw-thread the screw-threaded element having at least two axially separated threaded portions

Definitions

  • the present invention relates to an improved mechanical flush-mounted device, for application to perforated tiles.
  • the aim of the present invention is to overcome the above mentioned drawbacks , by providing an improved mechanical flush- mounted device, specifically designed for application to perforated tiles, which can be fixed or clamped in an optimum manner, by conventional clamping operations providing a rotation of the device body, so as to provide the desired expansion and consequent locking of the device.
  • a main object of the present invention is to provide such a mechanical device in which it is possible to obtain differentiated locking regions, adapted to be actuated independently from one another and which, consequently, are suitable to provide a very good clamping function.
  • Another object of the present invention is to provide such a mechanical device which, owing to its specifically designed constructional characteristics, is very reliable and safe in operation.
  • Yet another object of the present invention is to provide such an improved mechanical flush- mounted device which can be easily made starting from easily commercially available elements and materials.
  • an improved mechanical flush-mounted device for application to perforated tiles, characterized in that said device comprises a rod having an outer connecting end and defining a first threaded portion having a greater diameter and a second threaded portion having a smaller diameter, arranged at an inner end of said rod, said first and second threaded portion including, respectively, a first and second expandible plugs which can be independently radially expanded, by axial pressing means engaging with said threaded portions .
  • Figure 1 is an exploded perspective view illustrating the mechanical device according to the present invention
  • Figure 2 is a further perspective view illustrating the mechanical device according to the invention.
  • Figure 3 is a further perspective view illustrating said mechanical device engaged in a perforated tile element.
  • Figure 4 is a cross-sectional view illustrating the procedure for radially expanding and clamping or fixing the mechanical device according to the present invention on a perforated tile element.
  • the improved mechanical flush-mounted device specifically designed for application to perforated tiles and the like, according to the present invention, and which has been generally indicated by the reference number 1 , comprises a body 2 having an outer coupling or connecting end which can comprise an hexagonal rod 3, or, optionally, a screw element having a recessed hexagon cylindric head, or other like elements.
  • the body 1 defines a rod 4, comprising a first threaded portion 5, having a larger diameter, and a second threaded portion 6, having a smaller diameter.
  • a first washer 10 is arranged, and a second washer 11 is arranged between the first and second threaded portions, said second washer 11 being prevented from displacing since the larger diameter of the first threaded portion 5 will prevent said washer from sliding.
  • a first expanding plug 20 which can be radially expanded by a first cylindric nut 21, engaging with the threaded portion 5.
  • a second expanding plug 22 On the second threaded portion 6 is arranged a second expanding plug 22, abutting against the second washer 11 and being axially pressed by a second cylindric nut 23 engaging with the second threaded portion 6.
  • the latter is arranged at the inner end of the mechanical device according to the invention.
  • the plugs 20 and 22 are axially pressed, in an independent manner, under the action of the first cylindric nut 21 and second cylindric nut 23.
  • the expanding plugs 20, and 22 are radially expanded independently from one another .
  • the invention provides a mechanical flush-mounted device including a double expanding body, allowing to independently expand two expanding plugs, since two threaded portions having different diameters are provided.
  • the washer 11 operates as a separating and abutment element for the second expanding plug 22, which can be expanded independently from the radial expansion of the first expanding plug 20.
  • the invention, as disclosed, is susceptible to several modifications and variations, all of which will come within the scope of the invention. Moreover, all the constructional details can be replaced by other technically equivalent elements .
  • the used materials, and the contingent size and shapes can be any, depending on requirements.

Abstract

The present invention relates to an improved mechanical flush-mounted device for application to perforated tiles, comprising a rod (4) having an outer connecting end and defining a first threaded portion (5) having a greater diameter and a second threaded portion (6) having a less diameter arranged at the inner end. On the first and second threaded portions (5, 6)are provided, respectively, a first and second independently radially expandible plugs (21, 22) which can be independently expanded by different axial pressing elements engaging with the threaded portions (5, 6).

Description

DOWEL EXPANDED IN TWO PLACES
BACKGROUND OF THE INVENTION
The present invention relates to an improved mechanical flush-mounted device, for application to perforated tiles.
As is known, great difficulties are at present encountered in applying mechanical flush- mounted devices to walls made of perforated tiles and the like, since the plug which is radially expanded cannot be properly and firmly engaged in the perforated tile. Thus, prior flush-mounted mechanical devices, in some cases, can be unsatisfactorily clamped to a perforated tile construction.
In order to overcome the above mentioned drawbacks, several types of expandible plugs have already been designed, having very different constructions, such as, for example, finned resilient expanding plugs which, however, do not allow to obtain a satisfactory distribution of the applied efforts and, moreover, are of great constructional complexity and cost.
Other prior solutions, including the provision of differentiated-surface expanding plugs, have not been found satisfactory, since they could not provide a desired expanding pattern.
SUMMARY OF THE INVENTION Accordingly, the aim of the present invention is to overcome the above mentioned drawbacks , by providing an improved mechanical flush- mounted device, specifically designed for application to perforated tiles, which can be fixed or clamped in an optimum manner, by conventional clamping operations providing a rotation of the device body, so as to provide the desired expansion and consequent locking of the device.
Within the scope of the above mentioned aim, a main object of the present invention is to provide such a mechanical device in which it is possible to obtain differentiated locking regions, adapted to be actuated independently from one another and which, consequently, are suitable to provide a very good clamping function.
Another object of the present invention is to provide such a mechanical device which, owing to its specifically designed constructional characteristics, is very reliable and safe in operation.
Yet another object of the present invention is to provide such an improved mechanical flush- mounted device which can be easily made starting from easily commercially available elements and materials. According to one aspect of the present invention, the above mentioned aim and objects, as well as yet other objects, which will become more apparent hereinafter, are achieved by an improved mechanical flush-mounted device, for application to perforated tiles, characterized in that said device comprises a rod having an outer connecting end and defining a first threaded portion having a greater diameter and a second threaded portion having a smaller diameter, arranged at an inner end of said rod, said first and second threaded portion including, respectively, a first and second expandible plugs which can be independently radially expanded, by axial pressing means engaging with said threaded portions .
BRIEF DESCRIPTION OF THE DRAWINGS
Further characteristics and advantages of the present invention will become more apparent hereinafter from the following detailed disclosure of a preferred, though not exclusive, embodiment of an improved mechanical flush-mounted device, specifically designed for application to perforated tiles, and which is illustrated, by way of an indicative, but not limitative, example, in the accompanying drawings , where : Figure 1 is an exploded perspective view illustrating the mechanical device according to the present invention;
Figure 2 is a further perspective view illustrating the mechanical device according to the invention;
Figure 3 is a further perspective view illustrating said mechanical device engaged in a perforated tile element; and
Figure 4 is a cross-sectional view illustrating the procedure for radially expanding and clamping or fixing the mechanical device according to the present invention on a perforated tile element. DESCRIPTION OF THE PREFERRED EMBODIMENTS
With reference to the number references of the above mentioned figures, the improved mechanical flush-mounted device, specifically designed for application to perforated tiles and the like, according to the present invention, and which has been generally indicated by the reference number 1 , comprises a body 2 having an outer coupling or connecting end which can comprise an hexagonal rod 3, or, optionally, a screw element having a recessed hexagon cylindric head, or other like elements.
The body 1 defines a rod 4, comprising a first threaded portion 5, having a larger diameter, and a second threaded portion 6, having a smaller diameter.
At the transition region between the outer connecting end and first threaded portion 5, a first washer 10 is arranged, and a second washer 11 is arranged between the first and second threaded portions, said second washer 11 being prevented from displacing since the larger diameter of the first threaded portion 5 will prevent said washer from sliding. On the threaded portion 5 is engaged a first expanding plug 20, which can be radially expanded by a first cylindric nut 21, engaging with the threaded portion 5.
On the second threaded portion 6 is arranged a second expanding plug 22, abutting against the second washer 11 and being axially pressed by a second cylindric nut 23 engaging with the second threaded portion 6.
The latter is arranged at the inner end of the mechanical device according to the invention.
By using the device of the invention, upon having engaged the rod 4 in the hole provided therefor, by conventionally turning said rod, the plugs 20 and 22 are axially pressed, in an independent manner, under the action of the first cylindric nut 21 and second cylindric nut 23. Thus, as stated, the expanding plugs 20, and 22 are radially expanded independently from one another .
With the expanding plug arranged at a set given distance, it is possible to operate on several walls of a same perforated tile 10 or any other elements constituting a fixed construction, to which the subject mechanical device must be clamped.
From the above disclosure it should be apparent that the invention fully achieves the intended aim and objects.
In particular, the invention provides a mechanical flush-mounted device including a double expanding body, allowing to independently expand two expanding plugs, since two threaded portions having different diameters are provided.
The washer 11 operates as a separating and abutment element for the second expanding plug 22, which can be expanded independently from the radial expansion of the first expanding plug 20. The invention, as disclosed, is susceptible to several modifications and variations, all of which will come within the scope of the invention. Moreover, all the constructional details can be replaced by other technically equivalent elements .
In practicing the invention, the used materials, and the contingent size and shapes can be any, depending on requirements.

Claims

1. An improved mechanical flush-mounted device, for application to perforated tiles, characterized in that said device comprises a rod having an outer connecting end and defining a first threaded portion having a greater diameter and a second threaded portion having a smaller diameter, arranged at an inner end of said rod, said first and second threaded portion including, respectively, a first and second expandible plugs which can be independently radially expanded, by axial pressing means engaging with said threaded portions.
2. An improved mechanical device, according to Claim 1, characterized in that said outer connecting end comprises an hexagonal bar or rod.
3. An improved mechanical device, according to the preceding claims, characterized in that said outer connecting end comprises a screw having a recessed hexagon cylindric head.
4. An improved mechanical device, according to one or more of the preceding claims, characterized in that said device comprises a first washer arranged between said first threaded portion and said outer connecting end and a second washer arranged between said first and second threaded portions .
5. An improved mechanical device, according to one or more of the preceding claims, characterized in that said axial pressing means comprise cylindric nut elements having a different thread and respectively engaging with said first and second threaded portions .
6. An improved mechanical device, according to one or more of the preceding claims, characterized in that said first and second expanding plugs are arranged at a distance from one another corresponding to a thickness of the perforated tile walls in which said rod is engaged.
7. An improved mechanical flush-mounted device, specifically designed for application to perforated tiles , according to one or more of the preceding claims, and substantially as broadly disclosed and illustrated, and for the intended aim and objects.
PCT/IT2002/000343 2002-01-15 2002-05-29 Dowel expanded in two places WO2003060334A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AU2002314523A AU2002314523A1 (en) 2002-01-15 2002-05-29 Dowel expanded in two places

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
ITMI2002A000065 2002-01-15
IT2002MI000065A ITMI20020065A1 (en) 2002-01-15 2002-01-15 MECHANICAL DEVICE PERFECT FOR BUILT-IN PARTICULARLY DESIGNED FOR ITS APPLICATION TO PERFORATED BRICKS

Publications (1)

Publication Number Publication Date
WO2003060334A1 true WO2003060334A1 (en) 2003-07-24

Family

ID=11448881

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/IT2002/000343 WO2003060334A1 (en) 2002-01-15 2002-05-29 Dowel expanded in two places

Country Status (3)

Country Link
AU (1) AU2002314523A1 (en)
IT (1) ITMI20020065A1 (en)
WO (1) WO2003060334A1 (en)

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3110059A1 (en) * 1981-03-16 1982-09-23 Volker 4800 Bielefeld Hainke Tie bolt set
DE9312057U1 (en) * 1993-08-13 1994-12-22 Fischer Artur Werke Gmbh Plastic dowels
DE19542465A1 (en) * 1995-11-15 1997-07-10 Thiha Gmbh Verbindungselemente Wall mounting dowel
US5813808A (en) * 1996-10-28 1998-09-29 Wu; Ming-Hsin Expansion screw having overlapping expanding elements

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3110059A1 (en) * 1981-03-16 1982-09-23 Volker 4800 Bielefeld Hainke Tie bolt set
DE9312057U1 (en) * 1993-08-13 1994-12-22 Fischer Artur Werke Gmbh Plastic dowels
DE19542465A1 (en) * 1995-11-15 1997-07-10 Thiha Gmbh Verbindungselemente Wall mounting dowel
US5813808A (en) * 1996-10-28 1998-09-29 Wu; Ming-Hsin Expansion screw having overlapping expanding elements

Also Published As

Publication number Publication date
AU2002314523A1 (en) 2003-07-30
ITMI20020065A0 (en) 2002-01-15
ITMI20020065A1 (en) 2003-07-15

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