US20060255225A1 - Clamp for connecting two elements arranged at an angle to each other, in a support structure - Google Patents

Clamp for connecting two elements arranged at an angle to each other, in a support structure Download PDF

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Publication number
US20060255225A1
US20060255225A1 US11/356,534 US35653406A US2006255225A1 US 20060255225 A1 US20060255225 A1 US 20060255225A1 US 35653406 A US35653406 A US 35653406A US 2006255225 A1 US2006255225 A1 US 2006255225A1
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US
United States
Prior art keywords
jaw
clamp
clamp according
jaws
head
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
US11/356,534
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English (en)
Inventor
Bruno Nicoletti
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.)
Metal Work SpA
Original Assignee
Metal Work SpA
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 Metal Work SpA filed Critical Metal Work SpA
Assigned to METAL WORK S.R.L. reassignment METAL WORK S.R.L. ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: NICOLETTI, BRUNO
Publication of US20060255225A1 publication Critical patent/US20060255225A1/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
    • F16B7/00—Connections of rods or tubes, e.g. of non-circular section, mutually, including resilient connections
    • F16B7/04—Clamping or clipping connections
    • F16B7/044—Clamping or clipping connections for rods or tubes being in angled relationship
    • F16B7/0446—Clamping or clipping connections for rods or tubes being in angled relationship for tubes using the innerside thereof
    • F16B7/0473—Clamping or clipping connections for rods or tubes being in angled relationship for tubes using the innerside thereof with hook-like parts gripping, e.g. by expanding, behind the flanges of a profile
    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04B—GENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
    • E04B2/00—Walls, e.g. partitions, for buildings; Wall construction with regard to insulation; Connections specially adapted to walls
    • E04B2/74—Removable non-load-bearing partitions; Partitions with a free upper edge
    • E04B2/76—Removable non-load-bearing partitions; Partitions with a free upper edge with framework or posts of metal
    • E04B2/766—T-connections
    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04B—GENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
    • E04B2/00—Walls, e.g. partitions, for buildings; Wall construction with regard to insulation; Connections specially adapted to walls
    • E04B2/74—Removable non-load-bearing partitions; Partitions with a free upper edge
    • E04B2/76—Removable non-load-bearing partitions; Partitions with a free upper edge with framework or posts of metal
    • E04B2/78—Removable non-load-bearing partitions; Partitions with a free upper edge with framework or posts of metal characterised by special cross-section of the frame members as far as important for securing wall panels to a framework with or without the help of cover-strips
    • E04B2/7809—Removable non-load-bearing partitions; Partitions with a free upper edge with framework or posts of metal characterised by special cross-section of the frame members as far as important for securing wall panels to a framework with or without the help of cover-strips of single or multiple tubular form
    • E04B2/7818—Removable non-load-bearing partitions; Partitions with a free upper edge with framework or posts of metal characterised by special cross-section of the frame members as far as important for securing wall panels to a framework with or without the help of cover-strips of single or multiple tubular form of substantially rectangular form
    • 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
    • F16M—FRAMES, CASINGS OR BEDS OF ENGINES, MACHINES OR APPARATUS, NOT SPECIFIC TO ENGINES, MACHINES OR APPARATUS PROVIDED FOR ELSEWHERE; STANDS; SUPPORTS
    • F16M13/00—Other supports for positioning apparatus or articles; Means for steadying hand-held apparatus or articles
    • F16M13/02—Other supports for positioning apparatus or articles; Means for steadying hand-held apparatus or articles for supporting on, or attaching to, an object, e.g. tree, gate, window-frame, cycle
    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04B—GENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
    • E04B2/00—Walls, e.g. partitions, for buildings; Wall construction with regard to insulation; Connections specially adapted to walls
    • E04B2/74—Removable non-load-bearing partitions; Partitions with a free upper edge
    • E04B2002/749—Partitions with screw-type jacks

Definitions

  • the present invention concerns a clamp for connecting two elements, arranged at angles to each other, in a support structure.
  • Document TO2002A001042 describes a system for constructing mobile partition wall panels.
  • This system has a clamp, for coupling two components of a partition wall (for example, an upright and a cross beam), consisting of two jaws, inserted inside one of the two components; the clamps have teeth at one end which are inserted in two lengthways grooves of an upright or a cross beam and which clamp into the corresponding radial ribbing defining the walls of the grooves.
  • the clamp also has a front tooth which is inserted into another lengthways groove extending between the two lengthways grooves cited previously.
  • the clamp has means for adjusting the clamping force of the end teeth; the action of the adjusting means moves the teeth towards each other thus clamping a portion of the wall grooves between the teeth.
  • the clamp also has locking means which in addition to acting as a joint between the two jaws, keeps the clamp in position inside the upright or the cross beam.
  • Document EP 0.594.872 describes a clamp for connecting the upright and the cross beam of a modular structure.
  • This clamp has two wings partially inserted inside the cross beam so that the wing ends project from the head of the cross beam. Screw means acting on the wings move the wings towards each other and thus enable the wing ends to engage with the walls of the grooves in the upright.
  • Publication DE 2504476 describes a first profile in which a clamping element is inserted; this clamping element consists of a fixed, U-shaped element with a first operating end which receives a pivoting element with a second operating end.
  • Adjuster screw means act on both the elements and the first profile to move the second operating end away from the first operating end thereby coupling the ends to a second profile and thus defining a connection between the second and the first profiles. (The combination of the two elements cited and the screw means together define a lever of the first type).
  • connection between a first and a second element of the structure consists of a type of clamp connected to the first element and having at one end three fixing means which engage with corresponding grooves made on the second element. Clamping is performed by the fixing means engaging with a portion of the wall defining the groove.
  • DE 2504476 describes a system for the connection between a first and a second element of a modular structure provided with a clamp, partially inserted inside the first element, fitted with spreading components which move one end of the clamp away from the other thereby coupling the ends with the corresponding anchoring means on the second element.
  • the connection between the two elements is performed by moving the clamp ends apart.
  • the object of the present invention is to provide a clamp which guarantees a strong, efficient connection between the two elements of a support structure, positioned at an angle to each other.
  • An additional object of the present invention is to provide a clamp which is easy to assemble and clamp to an element of the support structure where the clamp is partially inserted.
  • a further object of the present invention is to provide a clamp for connecting two elements of the structure, irrespective of the profiles of the elements.
  • the invention provides a clamp which has a small number of components, has a simple, very functional design, is reliable and low-cost.
  • a clamp for connecting two elements, arranged at an angle to each other, in a support structure including:
  • FIGS. 1 and 2 show plan and side views respectively of the proposed clamp
  • FIG. 3 shows an exploded, perspective view of the clamp
  • FIG. 4 shows an exploded, perspective view of the clamp assembled with its associated element; this figure is at a smaller scale than the previous figures;
  • FIGS. 5 and 6 show partial cross sections of the plan view and side view respectively of the clamp assembled with its associated element; this figure is at a larger scale than the previous figures;
  • FIG. 7 shows a plan view of a first variant of the proposed clamp with its associated element and with alternative geometry
  • FIG. 8 shows a perspective view of a second variant of the clamp with some parts removed in order to enable a clearer view of others;
  • FIG. 9 is a plan view of the second variant of the proposed clamp assembled with its associated elements and with the same geometry as that shown in the previous figure and where one of the elements has special means for locking the element to the clamp;
  • FIG. 10 is a front view of the profile of the element shown in the previous figure with fittings for receiving the clamp.
  • reference numeral 100 indicates the proposed clamp for connecting the upright M to the beam T of a support structure.
  • the description which follows refers to a preferred method of assembly where the upright M and the beam T are perpendicular once they are connected together.
  • the clamp 100 is shaped so as to enable its insertion inside the beam T and comprises a first jaw 1 A and a second jaw 1 B hinged to each other at their respective first ends ( 11 A, 11 B) by joint means 13 designed to enable the jaws ( 1 A, 1 B) to be attached to the internal portion of a head of the beam T.
  • the joint means 13 consist of a pin 65 whose upper and lower ends engage with slots 49 only one of which is visible in FIG. 4 , where the slots are made in the upper and lower walls of the beam T.
  • the jaws ( 1 A, 1 B) At the opposing jaw ends ( 12 A, 12 B) projecting from the beam head, the jaws ( 1 A, 1 B) have lips ( 10 A, 10 B) whose shape matches that of the respective retaining means 3 made in the upright M.
  • the upright M (see FIGS. 5 and 6 ) has retaining components 3 consisting of a groove with a trapezoidal (dovetail) cross section made on each of the four identical walls of the upright M.
  • retaining components 3 consisting of a groove with a trapezoidal (dovetail) cross section made on each of the four identical walls of the upright M.
  • components 2 for moving the jaws ( 1 A, 1 B) apart consisting of a grub screw, engaging with a threaded, passing hole 9 in the second jaw 1 B where one of the grub screw heads stops against a portion 77 of the face of the first jaw 1 A facing the second jaw 1 B while the opposite grub screw head can be accessed from the outside through a corresponding window 5 made in the side wall of the first element T ( FIG. 4 ).
  • Elastic means 8 of a known type located between the jaws ( 1 A, 1 B) prevent the jaws moving towards each other.
  • the jaws ( 1 A, 1 B) are pre-assembled with a temporary hinge pin (not shown) and subject to the action of the grub screw 2 and the spring 8 which keep the jaws apart.
  • the clamp 100 is inserted along the beam axis starting from the head of the beam T so that the ends of the temporary pin are positioned at the slots 49 made in the upper and lower walls of the beam T.
  • the permanent joint pin 65 is inserted in one of these slots 49 thus displacing the temporary pin which disengages from the clamp and is pushed out of the beam through the slot on the opposite side.
  • the permanent joint pin 65 is long enough to engage with both surfaces of the slots 49 ; this prevents the clamp 100 from sliding out of the beam T.
  • This arrangement means that the lips ( 10 A, 10 B) of the jaws ( 1 A, 1 B) protrude from the beam T so that they can engage with the trapezoidal-shaped groove 3 in the upright M ( FIG. 5 ).
  • the clamp 100 connects an upright M 1 and a beam T 1 which are the same as each other but which have a different, alternative geometrical shape in comparison with the components illustrated in the previous figures.
  • the cross-section of these elements is defined by a central portion 60 , substantially rectangular in shape, whose outside walls have paired identical seats, the main seats ( 31 , 32 ) and the secondary seats ( 33 , 34 ) which can be accessed from the outside. More precisely, the seats made in opposite walls are the same as each other and symmetrical with respect to first longitudinal plane A and the second longitudinal plane B of the central portion 60 .
  • Each of the main seats ( 31 , 32 ) is defined by the respective external wall of the central portion 60 parallel to the first longitudinal plane A and a first pair of projections 92 which extend outwards from the central portion 60 and which are bent towards each other.
  • Each secondary seat ( 33 , 34 ) is defined by the respective external wall of the central portion 60 , parallel to the second longitudinal plane B and a pair of parallel wings 33 A which extend outwards from the central portion 60 and which are rounded at their free ends.
  • the central part of the head of the beam T 1 has a recess 99 defining, in the head, upper and lower projections 98 which, given the depth of the recess 99 when the upright M 1 and beam T 1 are coupled together, stop against the external wall of a wing of the related pair of wings 33 A of the upright M 1 and cover the external walls of the projections 92 thus defining the main seats ( 31 , 32 ) of the upright M 1 .
  • the internal part of the recess 99 stops against the external part of the corresponding projection 92 thus defining the main seats ( 31 , 32 ) of the upright M 1 .
  • the clamp lips are shaped so as to facilitate engagement inside one of the main seats ( 31 , 32 ).
  • FIGS. 8, 9 and 10 illustrate a second embodiment of the clamp 100 which connects an upright M and a beam T where the upright and beam are of the same type and have a geometry similar to that shown in FIG. 7 .
  • the clamp 100 consists of a first jaw 100 A and a second jaw 100 B made as a single piece from, for example, an elastic metal sheet, and fixed at their common single end 110 to the internal portion of the head of the beam T. More precisely, the clamp 100 , once it has been positioned inside the beam T, is fixed to the internal portion of the beam by a plurality of pairs of protuberances 74 , made according to known methods and projecting from the outside to the inside on the side wall of the central portion 60 . Each pair of protuberances 74 engages with a portion of the thickness of the common end 110 of the two jaws ( 100 A, 100 B) ( FIG. 9 ).
  • each jaw ( 100 A, 100 B) has a lip ( 190 A, 190 B) shaped to match the shape of the retaining means 300 made in the upright M.
  • means 200 for moving the jaws ( 100 A, 100 B) apart consisting of a grub screw engaging with a threaded passing hole 900 made in the second jaw 100 B, where one of the grub screw heads stops against a portion of the face of the first jaw 100 A facing the second jaw 100 B while the opposite grub screw head can be accessed from the outside through a corresponding window 500 made in the side wall of the first element T.
  • Turning the grub screw 200 moves the jaws ( 190 A, 190 B) apart from each other so that they apply pressure on the wall defining the retaining means 300 and thus hook the beam T and the upright M to each other.
  • Advantages of the proposed clamp are that it is easy to assemble and use and provides a strong, efficient connection between the upright and the beam.
  • the clamp described above thanks to its shape and thanks to that fact that the jaws move apart in order to connect the two elements, enables the connection between the two elements to be hidden; this is an advantage in comparison with other systems using clamps exerting a gripping action and which therefore require a cover to maintain a pleasing appearance at the joint between the two elements and to hide the connection area from view.
US11/356,534 2005-02-17 2006-02-17 Clamp for connecting two elements arranged at an angle to each other, in a support structure Abandoned US20060255225A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
ITBO2005A000075 2005-02-17
IT000075A ITBO20050075A1 (it) 2005-02-17 2005-02-17 Morsetto di collegamento tra due elementi, angolarmente disposti fra loro, di una struttura di supporto

Publications (1)

Publication Number Publication Date
US20060255225A1 true US20060255225A1 (en) 2006-11-16

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US11/356,534 Abandoned US20060255225A1 (en) 2005-02-17 2006-02-17 Clamp for connecting two elements arranged at an angle to each other, in a support structure

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US (1) US20060255225A1 (es)
ES (1) ES2329852B1 (es)
IT (1) ITBO20050075A1 (es)

Cited By (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2008081245A3 (en) * 2006-12-22 2008-10-16 Metal Work Srl A joint for furniture structures
WO2008129154A1 (fr) * 2007-02-19 2008-10-30 Christian Diat Systeme de construction de batiment a montage rapide par ossature mixte bois et metal
US20120199712A1 (en) * 2010-09-28 2012-08-09 Mark Schmid Cap display apparatuses, systems and methods
FR2979363A1 (fr) * 2011-08-22 2013-03-01 Jean Christian Diat Procede industriel de construction de portiques de maisons et de logements
US20130183085A1 (en) * 2010-09-23 2013-07-18 Syma Intercontinental Ag Slide plate for a cam-type closure
EP2930279A1 (en) * 2014-03-17 2015-10-14 VALSIR S.p.A. Coupling device for connecting two bars of a frame
US20150300386A1 (en) * 2014-02-28 2015-10-22 Micro World Corp. Hinged Mounting Clamp System
US10060460B1 (en) * 2017-07-05 2018-08-28 Brandon C. Winn Precursor for a furring channel clip, furring channel clip formed therefrom, method of making a furring channel clip, and method of mounting a furring channel to a load bearing member
USD979388S1 (en) * 2021-05-25 2023-02-28 Sus Co., Ltd. Structural material connection bracket
USD979389S1 (en) * 2021-05-25 2023-02-28 Sus Co., Ltd. Structural material connection bracket
JP7338872B2 (ja) 2020-03-16 2023-09-05 株式会社ピカコーポレイション 固定装置および棚装置
USD1013495S1 (en) * 2021-05-25 2024-02-06 Sus Co., Ltd. Structural material connection bracket
USD1013496S1 (en) * 2021-05-25 2024-02-06 Sus Co., Ltd. Structural material connection bracket

Citations (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2941855A (en) * 1958-03-05 1960-06-21 Thonet Ind Inc Tubular members and coupling means therefor
US3574367A (en) * 1968-01-26 1971-04-13 Johannes Jankowski Coupling
US3945742A (en) * 1973-12-19 1976-03-23 Georges Julien Condevaux Device for assembling sectional for instance metallic bars
US4360286A (en) * 1979-02-19 1982-11-23 Syma Intercontinental Ag Coupling element for supports having an undercut longitudinal groove
US4556337A (en) * 1983-03-07 1985-12-03 Framelock International Pty. Limited Connector for framing system
US4574552A (en) * 1981-10-30 1986-03-11 Protoned B.V Support frame
US4907388A (en) * 1988-08-11 1990-03-13 Siahatgar Mohammed T Modular panel frame assembly system
US5315805A (en) * 1991-09-28 1994-05-31 Wilhelm Von Der Dellen Device for erecting walls or ceilings, especially in exhibition constructions
US5657604A (en) * 1995-11-27 1997-08-19 Downing Displays, Inc. Panel connector
US6179511B1 (en) * 1988-12-24 2001-01-30 Kurt Gassler Quick-action connecting device
US6837389B2 (en) * 2001-11-15 2005-01-04 DOMO Architektursystems Logistic GmbH Profile-section support system for industrial-fair and exhibition construction
US7096637B2 (en) * 2001-08-23 2006-08-29 Mcmillan John Charles Display structure and system

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6442805B2 (en) * 1999-03-26 2002-09-03 Joel W. Pfister Attachment system for configured slots
ITTS20030008A1 (it) * 2003-03-18 2004-09-19 Alprogetti Srl Sistema di connessione sui montanti di ante,

Patent Citations (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2941855A (en) * 1958-03-05 1960-06-21 Thonet Ind Inc Tubular members and coupling means therefor
US3574367A (en) * 1968-01-26 1971-04-13 Johannes Jankowski Coupling
US3945742A (en) * 1973-12-19 1976-03-23 Georges Julien Condevaux Device for assembling sectional for instance metallic bars
US4360286A (en) * 1979-02-19 1982-11-23 Syma Intercontinental Ag Coupling element for supports having an undercut longitudinal groove
US4574552A (en) * 1981-10-30 1986-03-11 Protoned B.V Support frame
US4556337A (en) * 1983-03-07 1985-12-03 Framelock International Pty. Limited Connector for framing system
US4907388A (en) * 1988-08-11 1990-03-13 Siahatgar Mohammed T Modular panel frame assembly system
US6179511B1 (en) * 1988-12-24 2001-01-30 Kurt Gassler Quick-action connecting device
US5315805A (en) * 1991-09-28 1994-05-31 Wilhelm Von Der Dellen Device for erecting walls or ceilings, especially in exhibition constructions
US5657604A (en) * 1995-11-27 1997-08-19 Downing Displays, Inc. Panel connector
US7096637B2 (en) * 2001-08-23 2006-08-29 Mcmillan John Charles Display structure and system
US6837389B2 (en) * 2001-11-15 2005-01-04 DOMO Architektursystems Logistic GmbH Profile-section support system for industrial-fair and exhibition construction

Cited By (17)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2008081245A3 (en) * 2006-12-22 2008-10-16 Metal Work Srl A joint for furniture structures
US20100074675A1 (en) * 2006-12-22 2010-03-25 Metal Work S.R.L. Joint for furniture structures
WO2008129154A1 (fr) * 2007-02-19 2008-10-30 Christian Diat Systeme de construction de batiment a montage rapide par ossature mixte bois et metal
US20130183085A1 (en) * 2010-09-23 2013-07-18 Syma Intercontinental Ag Slide plate for a cam-type closure
US9051948B2 (en) * 2010-09-23 2015-06-09 Syma Intercontinental Ag Slide plate for an eccentric closure
US20120199712A1 (en) * 2010-09-28 2012-08-09 Mark Schmid Cap display apparatuses, systems and methods
FR2979363A1 (fr) * 2011-08-22 2013-03-01 Jean Christian Diat Procede industriel de construction de portiques de maisons et de logements
US20150300386A1 (en) * 2014-02-28 2015-10-22 Micro World Corp. Hinged Mounting Clamp System
EP2930279A1 (en) * 2014-03-17 2015-10-14 VALSIR S.p.A. Coupling device for connecting two bars of a frame
US10060460B1 (en) * 2017-07-05 2018-08-28 Brandon C. Winn Precursor for a furring channel clip, furring channel clip formed therefrom, method of making a furring channel clip, and method of mounting a furring channel to a load bearing member
US10385896B2 (en) * 2017-07-05 2019-08-20 Brandon C. Winn Precursor for a furring channel clip, furring channel clip formed therefrom, method of making a furring channel clip, and method of mounting a furring channel to a load bearing member
US10634177B2 (en) * 2017-07-05 2020-04-28 Brandon C. Winn Precursor for a furring channel clip, furring channel clip formed therefrom, method of making a furring channel clip, and method of mounting a furring channel to a load bearing member
JP7338872B2 (ja) 2020-03-16 2023-09-05 株式会社ピカコーポレイション 固定装置および棚装置
USD979388S1 (en) * 2021-05-25 2023-02-28 Sus Co., Ltd. Structural material connection bracket
USD979389S1 (en) * 2021-05-25 2023-02-28 Sus Co., Ltd. Structural material connection bracket
USD1013495S1 (en) * 2021-05-25 2024-02-06 Sus Co., Ltd. Structural material connection bracket
USD1013496S1 (en) * 2021-05-25 2024-02-06 Sus Co., Ltd. Structural material connection bracket

Also Published As

Publication number Publication date
ITBO20050075A1 (it) 2006-08-18
ES2329852A1 (es) 2009-12-01
ES2329852B1 (es) 2010-09-14

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AS Assignment

Owner name: METAL WORK S.R.L., ITALY

Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNOR:NICOLETTI, BRUNO;REEL/FRAME:017610/0988

Effective date: 20060203

STCB Information on status: application discontinuation

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