US20180279786A1 - Non-Rotating T-Nut and Screw Catch for Use in a Chair Panel and Method for Using the Same - Google Patents
Non-Rotating T-Nut and Screw Catch for Use in a Chair Panel and Method for Using the Same Download PDFInfo
- Publication number
- US20180279786A1 US20180279786A1 US15/478,527 US201715478527A US2018279786A1 US 20180279786 A1 US20180279786 A1 US 20180279786A1 US 201715478527 A US201715478527 A US 201715478527A US 2018279786 A1 US2018279786 A1 US 2018279786A1
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- United States
- Prior art keywords
- shaped
- oval
- nut
- seat back
- back panel
- 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
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- 238000000034 method Methods 0.000 title claims description 15
- 239000004033 plastic Substances 0.000 claims abstract description 22
- 238000003754 machining Methods 0.000 claims 2
- 238000010079 rubber tapping Methods 0.000 claims 2
- 239000002184 metal Substances 0.000 abstract description 16
- 238000004519 manufacturing process Methods 0.000 abstract description 9
- 239000004677 Nylon Substances 0.000 abstract description 7
- 229920001778 nylon Polymers 0.000 abstract description 7
- 239000000463 material Substances 0.000 abstract description 5
- 238000009987 spinning Methods 0.000 description 3
- 238000013461 design Methods 0.000 description 2
- 238000005520 cutting process Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000011120 plywood Substances 0.000 description 1
- 238000011160 research Methods 0.000 description 1
Images
Classifications
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- A—HUMAN NECESSITIES
- A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
- A47C—CHAIRS; SOFAS; BEDS
- A47C7/00—Parts, details, or accessories of chairs or stools
- A47C7/02—Seat parts
- A47C7/24—Upholstered seats
-
- 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
- F16B19/00—Bolts without screw-thread; Pins, including deformable elements; Rivets
- F16B19/04—Rivets; Spigots or the like fastened by riveting
- F16B19/08—Hollow rivets; Multi-part rivets
- F16B19/10—Hollow rivets; Multi-part rivets fastened by expanding mechanically
- F16B19/1027—Multi-part rivets
- F16B19/1036—Blind rivets
- F16B19/1081—Blind rivets fastened by a drive-pin
-
- A—HUMAN NECESSITIES
- A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
- A47C—CHAIRS; SOFAS; BEDS
- A47C7/00—Parts, details, or accessories of chairs or stools
- A47C7/36—Support for the head or the back
- A47C7/40—Support for the head or the back for the back
-
- 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
- F16B12/00—Jointing of furniture or the like, e.g. hidden from exterior
- F16B12/10—Jointing of furniture or the like, e.g. hidden from exterior using pegs, bolts, tenons, clamps, clips, or the like
- F16B12/28—Jointing of furniture or the like, e.g. hidden from exterior using pegs, bolts, tenons, clamps, clips, or the like for metal furniture parts
- F16B12/30—Jointing of furniture or the like, e.g. hidden from exterior using pegs, bolts, tenons, clamps, clips, or the like for metal furniture parts using threaded bolts
-
- 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
- F16B13/001—Dowels or other devices fastened in walls or the like by inserting them in holes made therein for that purpose with means for preventing rotation of the dowel
-
- 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
- F16B37/00—Nuts or like thread-engaging members
- F16B37/04—Devices for fastening nuts to surfaces, e.g. sheets, plates
-
- A—HUMAN NECESSITIES
- A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
- A47B—TABLES; DESKS; OFFICE FURNITURE; CABINETS; DRAWERS; GENERAL DETAILS OF FURNITURE
- A47B2230/00—Furniture jointing; Furniture with such jointing
- A47B2230/0029—Dowels
- A47B2230/0037—Dowels or dowel-pins
-
- 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
- F16B21/00—Means for preventing relative axial movement of a pin, spigot, shaft or the like and a member surrounding it; Stud-and-socket releasable fastenings
- F16B21/06—Releasable fastening devices with snap-action
- F16B21/07—Releasable fastening devices with snap-action in which the socket has a resilient part
- F16B21/073—Releasable fastening devices with snap-action in which the socket has a resilient part the socket having a resilient part on its inside
-
- 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
- F16B37/00—Nuts or like thread-engaging members
- F16B37/08—Quickly-detachable or mountable nuts, e.g. consisting of two or more parts; Nuts movable along the bolt after tilting the nut
- F16B37/0871—Quickly-detachable or mountable nuts, e.g. consisting of two or more parts; Nuts movable along the bolt after tilting the nut engaging the bolt laterally, i.e. without the need to engage the end of the bolt
- F16B37/0878—Quickly-detachable or mountable nuts, e.g. consisting of two or more parts; Nuts movable along the bolt after tilting the nut engaging the bolt laterally, i.e. without the need to engage the end of the bolt in one piece, e.g. C-shaped nuts
-
- 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
- F16B5/0216—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 position of the plates to be connected being adjustable
- F16B5/0225—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 position of the plates to be connected being adjustable allowing for adjustment parallel to the plane of the plates
-
- 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
- F16B5/06—Joining sheets or plates, e.g. panels, to one another or to strips or bars parallel to them by means of clamps or clips
- F16B5/0607—Joining sheets or plates, e.g. panels, to one another or to strips or bars parallel to them by means of clamps or clips joining sheets or plates to each other
- F16B5/0621—Joining sheets or plates, e.g. panels, to one another or to strips or bars parallel to them by means of clamps or clips joining sheets or plates to each other in parallel relationship
- F16B5/065—Joining sheets or plates, e.g. panels, to one another or to strips or bars parallel to them by means of clamps or clips joining sheets or plates to each other in parallel relationship the plates being one on top of the other and distanced from each other, e.g. by using protrusions to keep contact and distance
-
- 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
- F16B9/052—Connections of rods or tubular parts to flat surfaces at an angle by way of an intermediate member the intermediate member having a radial flange secured to the flat surface
Definitions
- the invention relates to an improved T-nut, a U-shaped screw catch for use in securing two upholstered chair panels to one another, and a method for using the same. More particularly, it relates to an oval-shaped T-nut which is tightly received in an oval-shaped receiver, for preventing the T-nut from rotating within the chair panel as a screw is threadably received by the T-nut.
- the U-shaped screw catch is adapted to receive a nylon or plastic barbed push rivet.
- the back consists of an upholstered inside panel and an upholstered outer panel.
- the inside panel is secured to tabs secured to the back frame and the outer panel is then secured to the inside panel.
- These upholstered panels secured to one another in this fashion, conceal the hardware used to secure the back panels to the chair frame and to one another.
- OSB oriented strand board
- Receivers are provided in the inside panel which receive T-nuts which are then aligned, or registered, with the tabs in the back support of the metal frame chair.
- Plastic T-nuts are typically used which accept a sheet metal type screw. The screw then cuts its own treads into the plastic material as the screw is driven in by powered screw drivers. This action creates high torque pressure on the plastic T-nut.
- the plastic T-nut is typically stapled to the OSB. If the plywood has a soft spot in the area of the staple, the T-nut will spin; and the screw will not tighten all the way down. This may then require the chair component to be disassembled and repaired, which results in delay and additional expense.
- the step of stapling the T-nut to the OSB requires additional materials and represents an additional step in the manufacturing process.
- a T-nut designed to prevent rotation within its receiver in the OSB as a screw is driven into the T-nut. Accordingly, one of the express objects of the present is to provide an improved T-nut adapted to prevent rotation.
- the present invention provides an oval-shaped T-nut that is received within an oval receiver machined into the upholstered first seat back panel, referred to herein as the inside panel, which is secured to a chair frame. Further, this eliminates the necessity of stapling the traditional plastic T-nut to the chair panel, thus reducing materials and eliminating a manufacturing step, thus saving time and money associated with the manufacture of an upholstered metal frame chair.
- a novel U-shaped screw catch is also provided.
- the U-shaped screw catch is received within an oval receiver machined into one of the upholstered panels, preferably the inside panel, the and is adapted to receive and engage the corresponding barbs or threads on a nylon or plastic push rivet which projects from the other upholstered chair panel.
- the combination of the push rivet and the U-shaped screw catch serve to secure the upholstered chair panels to one another.
- FIG. 1 is a plan view of a prior art T-nut used in the traditional method of assembling the back of an upholstered metal frame chair;
- FIG. 2A is a perspective view of the oval-shaped T-nut of the present invention.
- FIG. 2B is a top plan view of the oval-shaped T-nut of the present invention.
- FIG. 2C is an end elevation view of the oval-shaped T-nut of the present invention.
- FIG. 3A is a perspective view of the U-shaped screw catch of the present invention.
- FIG. 3B is a top plan view of the U-shaped screw catch of the present invention.
- FIG. 3C is an end elevation view of the U-shaped screw catch of the present invention.
- FIGS. 4A and 4B are an exploded perspective views of the inside back panel and outside back panel with the oval-shaped T-nut and U-shaped screw catch of the present invention
- FIG. 5 is a rear elevation view of the metal frame upholstered chair illustrated in FIG. 5 having the back panels removed for clarity of view;
- FIG. 6 is an exploded partial side cross-sectional view of the metal frame upholstered chair illustrated in FIG. 5 .
- FIG. 1 illustrates a traditional prior art T-nut 10 utilized in the manufacture of the upholstered seat back panels of a frame chair 15 , especially a metal frame chair. While such upholstered panels are found in both the vertical seat back portion and the horizontal seat support section portion of metal frame chair 15 , the present description makes specific reference to the inside seat back panel 20 and the outside seat back panel 30 that make up the upholstered back portion of metal frame chair 15 illustrated in FIG. 5 .
- Plastic T-nuts, such as traditional T-nut 10 in this field are typically used with a sheet metal type screw 35 .
- the screw 35 cuts its own treads into the plastic material as the screw 35 is driven into traditional T-nut 10 by powered screw drivers. This action creates high torque pressure on the plastic T-nut 10 .
- the plastic T-nut 10 is typically stapled with staple 25 to the inside panel 20 .
- oval-shaped T-nut 50 is provided.
- oval-shaped T-nut 50 is constructed from plastic.
- Oval-shaped T-nut 50 includes an oval-shaped flange 55 and an oval-shaped barrel 60 projecting therefrom.
- Oval-shaped barrel 60 is received by oval receiver 45 which is machined into inside panel 20 .
- Oval-shaped flange 55 engages the distal surface 22 of the inside panel 20 .
- a bore member 65 extends longitudinally through both the oval-shaped flange 55 and the oval-shaped barrel 60 .
- Bore member 65 is adapted to receive screw 35 and is dimensioned with respect to screw 35 such that screw 35 cuts threads into the barrel member 65 as the screw 35 is driven into bore member 65 .
- oval-shaped T-nut 50 and oval receiver 45 are dimensioned such that the oval-shaped barrel 60 of oval-shaped T-nut 50 is received and secured into oval receiver 45 in a press-fit, tight frictional engagement.
- a plurality of rib members 70 are disposed on the oval-shaped barrel 60 which are adapted to provide this tight frictional engagement between oval-shaped T-nut 50 and oval receiver 45 .
- oval receivers 75 are provided in selected locations along the periphery of inside panel 20 .
- Oval receivers 75 are adapted to receive screw catch 80 , illustrated in FIG. 3 , of the present invention.
- Screw catch 80 in an exemplary embodiment, is U-shaped. As used herein, the U-shape is defined by a shoulder portion 85 and first and second stems 90 projecting from said shoulder portion. Similar to the oval-shaped T-nut 50 described above, screw catch 80 includes a U-shaped flange 95 and a U-shaped barrel 100 projecting therefrom. In an exemplary embodiment, first and second stems 90 are substantially parallel to one another.
- first and second stems 90 Further projecting from the inside surface of first and second stems 90 are a plurality of fins or ridges 100 , which, as will be described in greater detail below, are adapted to engage corresponding barbs, or threads, on a nylon or plastic push rivet 120 .
- U-shaped screw catch 80 and oval receiver 75 are dimensioned such that the U-shaped barrel 100 of U-shaped screw catch 80 is received and secured into oval receiver 75 in a press-fit, tight frictional engagement.
- a plurality of rib members 105 are disposed on the U-shaped barrel 100 which are adapted to provide this tight frictional engagement between U-shaped screw catch 80 and oval receiver 75 .
- inside panel 20 is secured to a plurality of tabs 40 secured to the back frame of metal frame chair 15 .
- Inside panel 20 has a first, or distal, surface 22 facing away from tabs 40 and a second, or proximal, surface 24 facing towards and proximal to tabs 40 .
- Outside panel 30 has a first, or proximal, surface 32 facing towards, and proximal to, tabs 40 and a second, or distal, surface 34 facing away from tabs 40 .
- proximal and distal are used to describe the various surfaces in relation to tabs 40 .
- the proximal surfaces are the surfaces nearest the tabs while the distal surfaces are the surfaces away from tabs 40 .
- proximal and distal are used to describe the surfaces of inside panel 20 and outside panel 30 in terms of which surfaces are close to or away from the tabs 40 respectively.
- oval receivers 45 are machined into inside panel 20 so as to register with hole members provided in tabs 40 .
- Oval-shaped T-nut 50 is pressed into oval receiver 45 and is oriented such that the oval-shaped flange 55 engages the distal surface 22 .
- threaded fasteners such as screws 35
- screws 35 are inserted through the hole members provided in tabs 40 and into the bore member 65 provided in oval-shaped T-nut 50 .
- Screws 35 are tightened, cutting threads into the oval-shaped T-nut 50 as described herein.
- the oval-shaped flange 55 acts against the distal surface 22 of inside panel 20 pulling inside panel 20 tightly against tabs 40 ; and the inside panel 20 is secured to the back portion of the metal frame of chair 15 .
- Nylon or plastic push rivets 120 are inserted through outside panel 30 , in a manner that will be readily understood by those skilled in the art.
- push rivets 120 are barbed.
- Push rivets 120 are selectively spaced about the periphery of outside panel 30 so as to register with the U-shaped screw catches 80 , received within oval receivers 75 provided along the periphery of the inside panel 20 as described above.
- the linear space defined between the first and second stems 90 of U-shaped screw catches 80 provides for a greater margin of error for alignment of the push rivets 120 and U-shaped screw catches 80 than is allowed by the conventional hole members that would be traditionally provided.
- the U-shaped flange 95 of the U-shaped screw catch 80 engages the proximal surface 24 of the inside panel 20 and keeps the U-shaped screw catch 80 from being pushed out of oval receiver 75 as outside panel 30 is being pushed into engagement with inside panel 20 .
- a barbed nylon or plastic push rivet 120 is described herein, it will be appreciated by those skilled in the art that a nylon or plastic threaded screw could be utilized such that the threads of the screw engage the ridges 100 of the U-shaped screw catch 80 .
Abstract
An oval-shaped T-nut that is received within an oval receiver machined into the upholstered panel to be secured to a chair frame is provided. The oval shape of the T-nut prevents the oval-shaped T-nut from rotating when a screw is driven into the T-nut. Further, this eliminates the necessity of stapling the traditional plastic T-nut to the chair panel, thus reducing materials and eliminating a manufacturing step, thus saving time and money associated with the manufacture of an upholstered metal frame chair. In addition to the oval-shaped T-nut described herein, a novel U-shaped screw catch is also provided which cooperates with a barbed nylon or plastic push rivet to secure the upholstered chair panels to one another.
Description
- Not Applicable.
- Not Applicable
- The invention relates to an improved T-nut, a U-shaped screw catch for use in securing two upholstered chair panels to one another, and a method for using the same. More particularly, it relates to an oval-shaped T-nut which is tightly received in an oval-shaped receiver, for preventing the T-nut from rotating within the chair panel as a screw is threadably received by the T-nut. The U-shaped screw catch is adapted to receive a nylon or plastic barbed push rivet.
- In the field of chair manufacturing, especially metal frame chair manufacturing, it is known to have upholstered chair panels, particularly within the chair back, supported by and secured to the chair frame. One such chair is illustrated in U.S. Design Patent No. D433,836, which was invented by the inventor of the present invention. In chairs of this design, and to achieve a more desirable aesthetic effect, the back consists of an upholstered inside panel and an upholstered outer panel. Typically, the inside panel is secured to tabs secured to the back frame and the outer panel is then secured to the inside panel. These upholstered panels, secured to one another in this fashion, conceal the hardware used to secure the back panels to the chair frame and to one another. It is known, and will be understood by those skilled in the art, that typically the inside panel is constructed of oriented strand board, OSB. Receivers are provided in the inside panel which receive T-nuts which are then aligned, or registered, with the tabs in the back support of the metal frame chair. Plastic T-nuts are typically used which accept a sheet metal type screw. The screw then cuts its own treads into the plastic material as the screw is driven in by powered screw drivers. This action creates high torque pressure on the plastic T-nut. In order to prevent the plastic T-nut from spinning within the receiver as the screw is driven, the plastic T-nut is typically stapled to the OSB. If the plywood has a soft spot in the area of the staple, the T-nut will spin; and the screw will not tighten all the way down. This may then require the chair component to be disassembled and repaired, which results in delay and additional expense. Additionally, the step of stapling the T-nut to the OSB requires additional materials and represents an additional step in the manufacturing process. What is missing in the art is a T-nut designed to prevent rotation within its receiver in the OSB as a screw is driven into the T-nut. Accordingly, one of the express objects of the present is to provide an improved T-nut adapted to prevent rotation.
- In order to prevent the traditional T-nut, such as is typically utilized in the manufacture of the upholstered panels of a metal frame chair, from spinning while a screw is driven into it, the present invention provides an oval-shaped T-nut that is received within an oval receiver machined into the upholstered first seat back panel, referred to herein as the inside panel, which is secured to a chair frame. Further, this eliminates the necessity of stapling the traditional plastic T-nut to the chair panel, thus reducing materials and eliminating a manufacturing step, thus saving time and money associated with the manufacture of an upholstered metal frame chair.
- In addition to the oval-shaped T-nut described herein, a novel U-shaped screw catch is also provided. The U-shaped screw catch is received within an oval receiver machined into one of the upholstered panels, preferably the inside panel, the and is adapted to receive and engage the corresponding barbs or threads on a nylon or plastic push rivet which projects from the other upholstered chair panel. The combination of the push rivet and the U-shaped screw catch serve to secure the upholstered chair panels to one another.
- The above-mentioned features of the invention will become more clearly understood from the following detailed description of the invention read together with the drawings in which:
-
FIG. 1 is a plan view of a prior art T-nut used in the traditional method of assembling the back of an upholstered metal frame chair; -
FIG. 2A is a perspective view of the oval-shaped T-nut of the present invention; -
FIG. 2B is a top plan view of the oval-shaped T-nut of the present invention; -
FIG. 2C is an end elevation view of the oval-shaped T-nut of the present invention; -
FIG. 3A is a perspective view of the U-shaped screw catch of the present invention; -
FIG. 3B is a top plan view of the U-shaped screw catch of the present invention; -
FIG. 3C is an end elevation view of the U-shaped screw catch of the present invention; -
FIGS. 4A and 4B are an exploded perspective views of the inside back panel and outside back panel with the oval-shaped T-nut and U-shaped screw catch of the present invention; -
FIG. 5 is a rear elevation view of the metal frame upholstered chair illustrated inFIG. 5 having the back panels removed for clarity of view; and -
FIG. 6 is an exploded partial side cross-sectional view of the metal frame upholstered chair illustrated inFIG. 5 . -
FIG. 1 illustrates a traditional prior art T-nut 10 utilized in the manufacture of the upholstered seat back panels of aframe chair 15, especially a metal frame chair. While such upholstered panels are found in both the vertical seat back portion and the horizontal seat support section portion ofmetal frame chair 15, the present description makes specific reference to the insideseat back panel 20 and the outsideseat back panel 30 that make up the upholstered back portion ofmetal frame chair 15 illustrated inFIG. 5 . Plastic T-nuts, such as traditional T-nut 10, in this field are typically used with a sheetmetal type screw 35. Thescrew 35 cuts its own treads into the plastic material as thescrew 35 is driven into traditional T-nut 10 by powered screw drivers. This action creates high torque pressure on the plastic T-nut 10. In order to prevent the plastic T-nut 10 from spinning as thescrew 35 is driven, the plastic T-nut 10 is typically stapled withstaple 25 to theinside panel 20. - Referring to
FIGS. 2 and 4 , an exemplary embodiment oval-shaped T-nut 50 is provided. In an exemplary embodiment, oval-shaped T-nut 50 is constructed from plastic. Oval-shaped T-nut 50 includes an oval-shaped flange 55 and an oval-shaped barrel 60 projecting therefrom. Oval-shaped barrel 60 is received byoval receiver 45 which is machined intoinside panel 20. Oval-shaped flange 55 engages thedistal surface 22 of theinside panel 20. Additionally, abore member 65 extends longitudinally through both the oval-shapedflange 55 and the oval-shapedbarrel 60.Bore member 65 is adapted to receivescrew 35 and is dimensioned with respect to screw 35 such thatscrew 35 cuts threads into thebarrel member 65 as thescrew 35 is driven intobore member 65. The oval-shaped T-nut 50 andoval receiver 45 are dimensioned such that the oval-shapedbarrel 60 of oval-shaped T-nut 50 is received and secured intooval receiver 45 in a press-fit, tight frictional engagement. In an exemplary embodiment, a plurality ofrib members 70 are disposed on the oval-shapedbarrel 60 which are adapted to provide this tight frictional engagement between oval-shaped T-nut 50 andoval receiver 45. - In addition to the
oval receivers 45 described above, furtheroval receivers 75 are provided in selected locations along the periphery ofinside panel 20.Oval receivers 75 are adapted to receivescrew catch 80, illustrated inFIG. 3 , of the present invention.Screw catch 80, in an exemplary embodiment, is U-shaped. As used herein, the U-shape is defined by ashoulder portion 85 and first and second stems 90 projecting from said shoulder portion. Similar to the oval-shaped T-nut 50 described above,screw catch 80 includes aU-shaped flange 95 and aU-shaped barrel 100 projecting therefrom. In an exemplary embodiment, first and second stems 90 are substantially parallel to one another. Further projecting from the inside surface of first and second stems 90 are a plurality of fins orridges 100, which, as will be described in greater detail below, are adapted to engage corresponding barbs, or threads, on a nylon orplastic push rivet 120. Similar to the oval-shaped T-nut described above,U-shaped screw catch 80 andoval receiver 75 are dimensioned such that theU-shaped barrel 100 ofU-shaped screw catch 80 is received and secured intooval receiver 75 in a press-fit, tight frictional engagement. In an exemplary embodiment, a plurality ofrib members 105 are disposed on theU-shaped barrel 100 which are adapted to provide this tight frictional engagement betweenU-shaped screw catch 80 andoval receiver 75. - Referring to
FIGS. 6 and 7 , installation of theinside panel 20 andoutside panel 30, and use of the oval-shaped T-nut 50 andU-shaped screw catch 80 of the present invention will be described. In metal frame chairs, such aschair 15, the back portion consists of an upholstered insidepanel 20 and an upholsteredoutside panel 30. Those skilled in the art will recognize thatinside panel 20 is secured to a plurality oftabs 40 secured to the back frame ofmetal frame chair 15.Inside panel 20 has a first, or distal,surface 22 facing away fromtabs 40 and a second, or proximal,surface 24 facing towards and proximal totabs 40.Outside panel 30 has a first, or proximal,surface 32 facing towards, and proximal to,tabs 40 and a second, or distal,surface 34 facing away fromtabs 40. It should be understood that, as used herein, the terms “proximal” and “distal” are used to describe the various surfaces in relation totabs 40. Thus, the proximal surfaces are the surfaces nearest the tabs while the distal surfaces are the surfaces away fromtabs 40. The terms proximal and distal are used to describe the surfaces ofinside panel 20 andoutside panel 30 in terms of which surfaces are close to or away from thetabs 40 respectively. In this regard,oval receivers 45 are machined intoinside panel 20 so as to register with hole members provided intabs 40. Oval-shaped T-nut 50 is pressed intooval receiver 45 and is oriented such that the oval-shapedflange 55 engages thedistal surface 22. In an exemplary embodiment, threaded fasteners, such asscrews 35, are inserted through the hole members provided intabs 40 and into thebore member 65 provided in oval-shaped T-nut 50.Screws 35 are tightened, cutting threads into the oval-shaped T-nut 50 as described herein. As thescrews 35 are tightened, the oval-shapedflange 55 acts against thedistal surface 22 ofinside panel 20 pulling insidepanel 20 tightly againsttabs 40; and theinside panel 20 is secured to the back portion of the metal frame ofchair 15. - Nylon or plastic push rivets 120 are inserted through
outside panel 30, in a manner that will be readily understood by those skilled in the art. In an exemplary embodiment, push rivets 120 are barbed. Push rivets 120 are selectively spaced about the periphery ofoutside panel 30 so as to register with the U-shaped screw catches 80, received withinoval receivers 75 provided along the periphery of theinside panel 20 as described above. The linear space defined between the first and second stems 90 of U-shaped screw catches 80 provides for a greater margin of error for alignment of the push rivets 120 and U-shaped screw catches 80 than is allowed by the conventional hole members that would be traditionally provided. As theoutside panel 30 is brought into position, such that the push rivets 120 align with the U-shaped screw catches 80, theoutside panel 30 is then pressed towardsinside panel 20, forcing the push rivets into the U-shaped screw catches 80. The barbs provided on the shank ofpush rivet 120 engage with theridges 100 of theU-shaped screw catch 80 so as to lock thepush rivet 120 into a tight frictional engagement withU-shaped screw catch 80, so as to secureoutside panel 30 toinside panel 20. In an exemplary embodiment, theU-shaped flange 95 of theU-shaped screw catch 80 engages theproximal surface 24 of theinside panel 20 and keeps theU-shaped screw catch 80 from being pushed out ofoval receiver 75 asoutside panel 30 is being pushed into engagement withinside panel 20. While a barbed nylon orplastic push rivet 120 is described herein, it will be appreciated by those skilled in the art that a nylon or plastic threaded screw could be utilized such that the threads of the screw engage theridges 100 of theU-shaped screw catch 80. - While the present invention has been illustrated by description of several embodiments and while the illustrative embodiments have been described in detail, it is not the intention of the applicant to restrict or in any way limit the scope of the appended claims to such detail. Additional modifications will readily appear to those skilled in the art. The invention in its broader aspects is therefore not limited to the specific details, representative apparatus and methods, and illustrative examples shown and described. Accordingly, departures may be made from such details without departing from the spirit or scope of applicant's general inventive concept.
Claims (14)
1. An oval-shaped T-nut for use in assembling a chair, said oval-shaped T-nut comprising:
an oval-shaped flange;
an oval-shaped barrel projecting from said oval-shaped flange; and
a bore member adapted to receive a self-tapping screw, said bore member extending longitudinally through both said oval-shaped flange and said oval-shaped barrel, wherein said oval-shaped barrel of said oval-shaped T-nut is adapted to be received by an oval receiver machined into a panel of said chair, wherein said oval-shaped T-nut and said oval receiver are dimensioned such that said oval-shaped barrel is received within and secured into said oval receiver in a press-fit, tight frictional engagement.
2. The oval-shaped T-nut of claim 1 wherein said oval-shaped T-nut further comprises a plurality of rib members disposed on an exterior surface of said oval-shaped barrel.
3. A U-shaped screw catch for use in assembling a chair, said U-shaped screw catch comprising:
a U-shaped flange, said U-shaped flange having a shoulder portion and first and second stem portions, said first and second stem portions being substantially parallel to one another;
a U-shaped barrel projecting from said U-shaped flange, said U-shaped barrel defining a shoulder portion and first and second stem portions projecting from said shoulder portion, said first and second stem portions being substantially parallel to one another, wherein said U-shaped barrel of said U-shaped screw catch is adapted to be received by an oval receiver machined into a panel of said char, wherein said U-shaped screw catch and said oval receiver are dimensioned such that said U-shaped barrel is received within and secured into said oval receiver in a press-frit, tight frictional engagement; and
a plurality of ridges projecting from an inner surface of said first and second stem portions, said ridges adapted to engage with ridges disposed on a surface of a push rivet.
4. The U-shaped screw catch of claim 3 wherein said U-shaped screw catch further comprises a plurality of rib members disposed on an exterior surface of said U-shaped barrel.
5. In a frame chair having back frame, a plurality of tabs selectively positioned on said back frame and upholstered seat back panels, a method for connecting a first upholstered seat back panel to the tabs positioned on the back frame and for connecting a second upholstered seat back panel to the first upholstered seat back panel, said method comprising:
providing a hole member in each of said tabs;
providing a plurality of oval-shaped T-nuts having an oval-shaped flange, an oval-shaped barrel projecting from said oval-shaped flange and a bore member adapted to receive a self-tapping screw, said bore member extending longitudinally through both said oval-shaped flange and said oval-shaped barrel;
providing a plurality of U-shaped screw catches having a U-shaped flange and a U-shaped barrel projecting from said U-shaped flange, said U-shaped barrel defining a shoulder portion and first and second stem portions projecting from said shoulder portion, said first and second stem portions being substantially parallel to one another and having a plurality of ridges projecting from an inner surface of said first and second stem portions;
providing a first seat back panel;
providing a second seat back panel;
machining a first plurality of oval receivers in said first seat back panel, wherein said each of said first plurality of oval receivers is adapted to receive an oval-shaped T-nut in a press-fit, tight frictional engagement;
disposing an oval-shaped T-nut in each of said first plurality of oval receivers in a press-fit, tight frictional engagement;
machining a second plurality of oval receivers in said first seat back panel, wherein each of said second plurality of oval receivers is adapted to receive a U-shaped screw catch in a press-fit, tight frictional engagement;
disposing a U-shaped screw catch in each of said second plurality of oval receivers in a press-fit, tight frictional engagement;
securing said first seat back panel to said plurality of tabs by inserting a threaded fastener through said hole member provided in each of said tabs and into said bore member in said oval-shaped T-nut;
inserting plurality of push rivets through said second seat back panel such that each of said plurality of push rivets registers with one of said U-shaped screw catches disposed in said first seat back panel; and
pressing said second seat back panel towards said first seat back panel thereby forcing said push rivets into said U-shaped screw catches, whereby said second seat back panel is secured to said first seat back panel.
6. The method of claim 5 wherein said U-shaped flange of said U-shaped screw catch engages a proximal surface of said first seat back panel thereby preventing said U-shaped screw catch from being pushed out of said oval receiver as said second seat back panel is being pushed into engagement with said first seat back panel.
7. The method of claim 5 wherein said oval-shaped T-nut is oriented with respect to said first seat back panel such that said oval-shaped flange engages an distal surface of said first seat back panel, whereby as said threaded fasteners are tightened said oval-shaped flange acts against said distal surface of said first seat back panel pulling said first seat back panel tightly against said tabs.
8. The method of claim 5 wherein said threaded fasteners are machine screws and said bore member is dimensioned with respect to said machine screw such that said machine screw cuts threads into said barrel member as said machine screw is rotatably driven into said bore member.
9. The method of claim 5 wherein said oval-shaped T-nut is manufactured of plastic and further wherein said U-shaped screw catch is manufactured of plastic.
10. The method of claim 5 wherein said oval-shaped T-nut further has a plurality of rib members disposed on said oval-shaped barrel.
11. The method of claim 5 wherein said U-shaped screw catch further has a a plurality of rib members disposed on said U-shaped barrel.
12. The method of claim 5 wherein said first and said second seat back panels are each upholstered.
13. The method of claim 5 wherein said push rivet is threaded.
14. The method of claim 5 wherein said push rivet is barbed.
Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US15/478,527 US20180279786A1 (en) | 2017-04-04 | 2017-04-04 | Non-Rotating T-Nut and Screw Catch for Use in a Chair Panel and Method for Using the Same |
US16/526,492 US11306760B2 (en) | 2017-04-04 | 2019-07-30 | Non-rotating T-nut and screw catch for use in a chair panel and method for using the same |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US15/478,527 US20180279786A1 (en) | 2017-04-04 | 2017-04-04 | Non-Rotating T-Nut and Screw Catch for Use in a Chair Panel and Method for Using the Same |
Related Child Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US16/526,492 Division US11306760B2 (en) | 2017-04-04 | 2019-07-30 | Non-rotating T-nut and screw catch for use in a chair panel and method for using the same |
Publications (1)
Publication Number | Publication Date |
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US20180279786A1 true US20180279786A1 (en) | 2018-10-04 |
Family
ID=63672659
Family Applications (2)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US15/478,527 Abandoned US20180279786A1 (en) | 2017-04-04 | 2017-04-04 | Non-Rotating T-Nut and Screw Catch for Use in a Chair Panel and Method for Using the Same |
US16/526,492 Active 2038-04-19 US11306760B2 (en) | 2017-04-04 | 2019-07-30 | Non-rotating T-nut and screw catch for use in a chair panel and method for using the same |
Family Applications After (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US16/526,492 Active 2038-04-19 US11306760B2 (en) | 2017-04-04 | 2019-07-30 | Non-rotating T-nut and screw catch for use in a chair panel and method for using the same |
Country Status (1)
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US (2) | US20180279786A1 (en) |
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Also Published As
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US11306760B2 (en) | 2022-04-19 |
US20190353193A1 (en) | 2019-11-21 |
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