US3858990A - Tube holder and interconnector system - Google Patents

Tube holder and interconnector system Download PDF

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Publication number
US3858990A
US3858990A US327880A US32788073A US3858990A US 3858990 A US3858990 A US 3858990A US 327880 A US327880 A US 327880A US 32788073 A US32788073 A US 32788073A US 3858990 A US3858990 A US 3858990A
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United States
Prior art keywords
tube holder
expander
interconnector
tube
spreader arms
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.)
Expired - Lifetime
Application number
US327880A
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English (en)
Inventor
Otto Busselmeier
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Individual
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Individual
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Publication date
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Publication of US3858990A publication Critical patent/US3858990A/en
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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
    • 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
    • F16B12/40—Joints for furniture tubing
    • 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
    • F16B2200/00—Constructional details of connections not covered for in other groups of this subclass
    • F16B2200/20—Connections with hook-like parts gripping behind a blind side of an element to be connected
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T403/00—Joints and connections
    • Y10T403/55—Member ends joined by inserted section
    • Y10T403/557—Expansible section
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T403/00—Joints and connections
    • Y10T403/70—Interfitted members
    • Y10T403/7005—Lugged member, rotary engagement
    • Y10T403/7007—Bayonet joint

Definitions

  • ABSTRACT A tube holder for connecting a tube to an interconnector which has clamping dogs, and comprising a base one end of which carries rigid clamping'lugs whichare adapted to engage the clamping dogs on said inconnector to clamp said holder and said interconnector together when said holder and said interconnector are placed together and relatively rotated,
  • SHEET 1 [IF 3 TUBE HOLDER AND INTERCONNECTOR SYSTEM BACKGROUND OF THE INVENTION on the tube holder, in either direction, can be clamped together; a resilient intermediate component of the tube holder being forced against the internal wall of the tube by means of a tensioner.
  • One tube holder is known in which the cuboid interconnector and/or the tube holder itself, has curvilinear tracks and slider pins.
  • the tube holder is introduced into the tube and its clamping lugs directed into the interconnector.
  • a resilient intermediate component inside the tube is compressed with the aid of a tensioner and thus loaded against the internal wall of the tube.
  • clamping takes place between the tube holder and the cuboid interconnector, through the agency of the dogs and clamping lugs.
  • the present invention separates the function of fixing the tube holder inside the tube, from that of clamping the tube holder to the cuboid interconnector.
  • a tube holder for connecting a tube to an interconnector which has.
  • clamping dogs comprises a base one end of which carries rigid clamping lugs which are adapted to engage the clamping dogs on said interconnector to clamp said holder and said interconnector together when said holder and said interconnector are placed together and relatively rotated, and a resilient intermediate component which can be expanded to engage the internal 'wall of said tube by an expander actuated by a tension screw which has a head located at the same end of said tube holder as said clamping lugs.
  • the tube is fixed to the tube holder by the expansion of spreader arms on the resilient intermediate component, using a wedge-like expander, operated by the tension screw, the operation taking place in a region or plane perpendicular to the tube axis.
  • the tube holder with the spreader arms in the relaxed retracted state has a greater or lesser degree of clearance in the tube, because of the latters internal dimensional tolerances, and this clearance, outside the region or plane where the expansion of the spreader arms takes place within the tube, is still present to a partial extent, even after fixing has taken place.
  • the fixed tube holder although it is attached to the cuboid interconnector in a fixed backlash-free fashion, can tilt a certain amount in the tube, under bending loads, and this has the disadvantage of giving the joint a certain resilience. If frequent alternating bending loads are applied, it may happen that the fixed tube holder will shift some distance out of the tube.
  • a further example avoids this drawback however by virtue of the fact that the tube holder is provided with a second resilient intermediate component which can be expanded in a plane perpendicular to the axis of said tube in which it is to be used, said plane being spaced apart axially from the perpendicular plane of expansion of said first resilient intermediate component.
  • FIG. 1 is a section through a cuboid interconnector and with a first tube holder illustrated partially in section and partially in elevation, and a plan view of part of a second tube holder inserted in the interconnector at right angles to the first,
  • FIG. 2 is a plan view of one of the tube holders shown in FIG. 1, i
  • FIG. 3 is an elevation of the cuboid interconnector shown in FIG. 1,
  • FIG. 4 is a section on the line IVIV of FIG. 1,
  • FIG. 5 is a plan view of the expander used in the tube holder shown in FIG. 1,
  • FIG. 6 is a section through the expander
  • FIG. 7 shows a second embodiment of the tube holder partially in section and partially in elevation
  • FIG. 8 shows the two resilient intermediate components used in the construction shown in FIG. 7, partially'in' section,
  • FIG. 9 is a plan view in the direction of the arrow IX on one of the intermediate components
  • FIG. 10 shows a third embodiment partially in elevation and partially in section
  • FIG. 11 shows a fourth embodiment in section and side elevation
  • FIG. 12 shows a further variant embodiment in section and side elevation, and,
  • FIG. 13 shows a sixth embodiment partially in section and partially in side elevation and plan, considered in the direction of the arrow X.
  • the cuboid interconnector 1 shown in FIG. 1 consists of two identical parts 3 and 3' which have prongs 4 and corresponding recesses 5 which interlock with one another when the two parts are assembled so that they -are accurately located in the correct position for a brazing operation which holds the parts together, and the cube thus made is then hardened. All six sides of the cube have identical openings 6 each of which has four recesses 7. Between these recesses, pointing towards the interior are fourrcurvilinear projections or cams 8 which 1 have been punched inwards, in the manner shown in FIG. 4. The recesses 7 are directed towards the side of the cube, whilst the cams 8 are directed towards the corners and are thus each located upon a diagonal.
  • a first tube holder 2 shown half in section and half I in elevation is shown engaged in the lower opening 6 of clamping lugs 15, a tension screw 18 and an expander 12.
  • the base 9 has a shoulder 13 which prevents the tube holder 2 from slipping into the tube 20 which it is holding.
  • the hardened tensioner 11 has four laterally projecting clamping lugs 15 and is embedded in the base 9 which is made of synthetic material so that the clamping lugs 15 point diagonally towards the corners.
  • the expander 12 has a pocket 16 containing a squareheaded nut 17 which is engaged by the screw 18.
  • the expander 12 in the form of a regular octagonal pyramid so that it can be assembled in arbitrary positions in co-operation with taper surfaces 14 on the rear internal surfaces of the spreader arms 10.
  • the screw head 22 is located in the region inside the tensioner 11 with its clamping lugs 15.
  • the tensioner 11, with its clamping lugs 15 is now introduced into an opening 6 in the cube 1, the square profile of tube and cube being arranged at an angle of 45 to one another.
  • the clamping lugs 15 of the tube holders 2 can be engaged behind the cams or dogs 8 formed in the opening 6 of the cube 1, the relevant sideplate of the hardened cube being resiliently distorted by a small amount. In this fashion a very secure connection between cube and tube holder is obtained.
  • tubes can be connected to all the other sides of faces 114 at their inner ends.
  • the base 109 has four chamfered surfaces 123, supplementary to those shown in the first example.
  • the expander 1 12 additionally possesses four spreader arms 124 with chamfered surfaces 125 and also has four-chamfered surfaces 119,
  • the tube holder When assembled together, as shown in FIG. 7, the tube holder is introduced into a tube 20 and there fixed by tightening up the screw 118.
  • the spreader arms 124 of the expander 112 are clamped in the tube 20 in the neighbourhood of the plane A-A, whilst at the same time the surfaces 119 act upon the surfaces 114 so that the spreader arms 110 of the base 109 are secured in the tube in the neighbourhood of the plane B-B.
  • the spreader arms 110 of the base 109 are pressed, as in the case of the first example, into the internal corners of the tube whilst the spreader arms 124 of the expander 112 are loaded against the flat internal walls of the tube.
  • the axial interval between the planes A-A and 8-8 means that the system of securing the tube holder inside the tube is particularly resistant to bending and buckling stresses, even under conditions of frequent load alternation.
  • tube holders with the'features of the present invention could also be designed for other materials and for other tube profiles.
  • the expander 12' is a dishlike sheet metal component with a threaded central bore in which a tension screw 18 engages.
  • the base 9" is rigidly attached to the end 9 of a cupped sheet metal component whose walls consist of spreader arms 10' and a tensioner 11' with clamping lugs 15 is rigidly connected to the base 9".
  • the expander 12 can be in the form of a deep-drawn metalcomponent with a threaded bore and the spreader arms can likewise consist of sheet steel.
  • a frame or rack is to be dismantled and re-erected at another point, for example a requirement which occurs in the case of measuring equipment, then the tube holders remain attached to the tube sections so that the assembly time for re-erection is shortened and additional attachments to the frame can be produced without the need to change any of the connectors.
  • the tube holder made primarily of synthetic plastics material is intended for use with square-section tubes andconsists of a base 109 in which tensioner 111, with its clamping lugs 115, is embedded, and an expander 112 and a tensioner screw 118 with the nut 117 are provided.
  • the base 109 has four spreader arms 110 provided with chamfered sur-
  • a tensioner 311, with'clamping lugs 315 is rigidly attached to a base 309.
  • an intermediate component 3'10 Rigidly connected to the'base 309 is an intermediate component 3'10 and arranged 'within the intermediate component, and between tensioner plates 312 and 312", is an expander 312 which consists of an resilientma'terial, for example, rubber.
  • the front tensioner plate 312",Iike the expander 312, is provided with a bore, whilst the rear tensioner plate 312' has a threaded bore in which a screw 318 engages. When the screw 318 is rotated, the expander 312 is clamped be tween the tensioner plates 312' and 312" so that the spreader arms 310' of the intermediate component 310 are forced outwards.
  • the spreader arms 310' are formed by L-shaped cut-outs 310' in the intermediate component 310. By using this shape of cut-outs the spreader arms 310 bear against the internal wall of the tube which is to be clamped, over virtually their entire length.
  • a tubular tensioner 411 with clamping lugs 415 is rigidly attached to a base 409. Inside the tubular tensioner 411, there is a rigid shoulder 427 against which the head of a tension screw 418 can seat. Rigidly connected to the base 409 is an intermediate component 410, preferentially in two mutually opposite locations 428.
  • the tension screw 418 engages in a threaded bore in the tensioner plate 412 and within the intermediate component 410, once again there is an expander 412 of resilient material, surrounding a tubular tensioner 411.
  • the tensioner plate 412' is provided with a shoulder 426 which serves to centralise the tensioner plate 412' of the sleeve-like tensioner 411.
  • the intermediate component is provided with several cut-outs 410", extending in the longitudinal direction, so that several spreader arms 410' are formed.
  • the fixing of the tube holder in the tube is thus effective over virtually the full length of the tube holder.
  • a base 509 is once again rigidly connected to a tubular tensioner 511 which has clamping lugs 515.
  • a shoulder 527 is provided against which thehead of a tension screw 518 seats, the end of the screw 518 engaging in a threaded bore in an expander 512.
  • This capshaped expander 512 enshrouds the rear end of a part 526 of an intermediate component 510. Said part 526 is guided on the outside of the tensioner 511 and also at the centre, over the section 529.
  • the intermediate component 510 has several spreader arms 510, U-shaped and articulated at their ends, which arms, when the expander 512 is tightened up by the screw 518, expand towards the tube which is to be fixed.
  • the bottom part of FIG. 13 shows the position of the spreader arms 510 relatively to a tube 20 to which the holder is to be secured.
  • a tube holder and interconnector system for the assembly and dismantling of frames and structures made up of at least two profiled tubes comprising:
  • tube holders each comprising a base (9, 109, 9', 309, 409, 509), one end of which carries rigid clamping lugs (15, 115, 315, 415, 515);
  • a tension screw (18, 118, 18, 318, 418, 518) having a head located at the same end of said tube holder as said clamping lugs;
  • said tube holders being designed to be clamped to said interconnector means by means of inserting said lugs into said openings and rotating said lugs with respect to said dogs until said lugs and said dogs interlock.
  • a tube holder and interconnector system as claimed in claim 1 in which said clamping lugs are rigidly connected to said base and in which said screw passes through said base and is seated with said head against said end carrying said clamping lugs.
  • a tube holder and interconnector system as claimed in claim 4 in which said clamping lugs and said dogs are engaged on diagonals of said interconnector.
  • a tube holder and interconnector system as claimed in claim 2 in which said screw head is located within the area defined by said clamping lugs.
  • a tube holder and interconnector system as claimed in claim 1 in which said expander is conical in shape in its axial plane and has tapered surfaces, and in which said intermediate component includes several spreader arms which also have tapered, internal surfaces which are engaged by the tapered surfaces on the expander when said expander is actuated by said screw.
  • a tube holder and interconnector system as claimed in claim 7 in which said expander has a pocket extending at right angles to the axis of said screw and in which pocket a nut is located which is threaded on said screw.
  • a tube holder and interconnector system as claimed in claim 7 in which four spreader arms are provided and wherein said expander in its radial plane is in the shape of a regular octagonal pyramid.
  • a tube holder and interconnector system as claimed in claim 1 in which a second intermediate component is provided which can be expanded in a plane perpendicular to the axis of the tube in which it is to be used, said plane being spaced apart axially from the perpendicular plane of expansion of said first interme diate component.
  • a tube holder and interconnector system as claimed in claim 10 in which said base has chamfered faces, and said second intermediate component being provided by spreader arms formed on said expander,
  • a tube holder and interconnector system as claimed in claim 11 in which said first intermediate component is provided by several spreader arms on said base which are arranged at 45 to said spreader arms on said expander.
  • a tube holder and interconnector system as claimed in claim 13 in which said spreader arems of said base are arranged in gaps between said spreader arms of said expander.
  • a tube holder and interconnector system as claimed in claim 1 in which said expander comprises a resilient body and there is included a tensioner plate on said expander, and wherein said intermediate component comprises several spreader arms which surrounds said expander, and which, when said tension screw is actuated, is compressed by said tensioner plate and acts with its peripheral surface to expand said spreader arms of said intermediate component which surrounds it.
  • a tube holder and interconnector system as claimed in claim 15 in which said spreader arms are said tension plate having a guide shoulder which guides said plate on said tension sleeve.

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Mutual Connection Of Rods And Tubes (AREA)
  • Clamps And Clips (AREA)
  • Supports For Pipes And Cables (AREA)
  • Furniture Connections (AREA)
US327880A 1972-01-31 1973-01-29 Tube holder and interconnector system Expired - Lifetime US3858990A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE2204461A DE2204461A1 (de) 1972-01-31 1972-01-31 Rohrhalter fuer rohrverbinder

Publications (1)

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US3858990A true US3858990A (en) 1975-01-07

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ID=5834568

Family Applications (1)

Application Number Title Priority Date Filing Date
US327880A Expired - Lifetime US3858990A (en) 1972-01-31 1973-01-29 Tube holder and interconnector system

Country Status (10)

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US (1) US3858990A (fr)
JP (1) JPS5525286B2 (fr)
AT (1) AT318188B (fr)
BE (1) BE794557A (fr)
CA (1) CA971332A (fr)
CH (1) CH560333A5 (fr)
DE (1) DE2204461A1 (fr)
FR (1) FR2170673A5 (fr)
GB (1) GB1383161A (fr)
NL (1) NL7300266A (fr)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4596487A (en) * 1983-10-17 1986-06-24 Maurice Piget Mechanical expansion device for internally clamping assembled hollow sections
US4705423A (en) * 1986-06-16 1987-11-10 Kevin Smith Integral frame connecting apparatus
US4753102A (en) * 1985-06-07 1988-06-28 L. Schuler Gmbh Arrangement for coupling and decoupling gripper rail partial sections of a transfer press
US5056953A (en) * 1988-05-11 1991-10-15 Societe De Design Et D'agencement Assembly device for assembling dismountable or modular elements
US5249760A (en) * 1990-02-23 1993-10-05 Shimano, Inc. Fishing reel with feed shaft and transmission member
US20040195193A1 (en) * 2003-04-03 2004-10-07 Bio-Rad Laboratories, Inc. Tube rack accommodating a range of tube diameters

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4540307A (en) * 1984-06-01 1985-09-10 The Hollaender Manufacturing Co. Fitting for structural pipe
JPH0459157U (fr) * 1990-09-28 1992-05-21

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1762776A (en) * 1927-12-22 1930-06-10 Charles W Gardner Furniture leg
US2643581A (en) * 1950-02-09 1953-06-30 Leitz Ernst Gmbh Bayonet union for camera objective parts
US2972495A (en) * 1959-06-08 1961-02-21 Yalen Abraham Spring metal u-shaped anchor
US3545796A (en) * 1969-01-22 1970-12-08 John William Nicholls Framework construction connector
US3563581A (en) * 1969-09-29 1971-02-16 Michael Sommerstein Joint for structural assemblies
US3719376A (en) * 1971-03-22 1973-03-06 J Johnson Expansion device for mounting an upright column to a base structure

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS457550Y1 (fr) * 1966-10-27 1970-04-11

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1762776A (en) * 1927-12-22 1930-06-10 Charles W Gardner Furniture leg
US2643581A (en) * 1950-02-09 1953-06-30 Leitz Ernst Gmbh Bayonet union for camera objective parts
US2972495A (en) * 1959-06-08 1961-02-21 Yalen Abraham Spring metal u-shaped anchor
US3545796A (en) * 1969-01-22 1970-12-08 John William Nicholls Framework construction connector
US3563581A (en) * 1969-09-29 1971-02-16 Michael Sommerstein Joint for structural assemblies
US3719376A (en) * 1971-03-22 1973-03-06 J Johnson Expansion device for mounting an upright column to a base structure

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4596487A (en) * 1983-10-17 1986-06-24 Maurice Piget Mechanical expansion device for internally clamping assembled hollow sections
US4753102A (en) * 1985-06-07 1988-06-28 L. Schuler Gmbh Arrangement for coupling and decoupling gripper rail partial sections of a transfer press
US4705423A (en) * 1986-06-16 1987-11-10 Kevin Smith Integral frame connecting apparatus
US5056953A (en) * 1988-05-11 1991-10-15 Societe De Design Et D'agencement Assembly device for assembling dismountable or modular elements
US5249760A (en) * 1990-02-23 1993-10-05 Shimano, Inc. Fishing reel with feed shaft and transmission member
US20040195193A1 (en) * 2003-04-03 2004-10-07 Bio-Rad Laboratories, Inc. Tube rack accommodating a range of tube diameters
WO2004093604A1 (fr) * 2003-04-03 2004-11-04 Bio-Rad Laboratories, Inc. Ratelier pour tubes de diametres differents
US7000785B2 (en) * 2003-04-03 2006-02-21 Bio-Rad Laboratories, Inc. Tube rack accommodating a range of tube diameters

Also Published As

Publication number Publication date
DE2204461A1 (de) 1973-08-09
GB1383161A (en) 1975-02-05
FR2170673A5 (fr) 1973-09-14
JPS4887425A (fr) 1973-11-17
BE794557A (fr) 1973-05-16
CA971332A (en) 1975-07-22
NL7300266A (fr) 1973-08-02
CH560333A5 (fr) 1975-03-27
AT318188B (de) 1974-09-25
JPS5525286B2 (fr) 1980-07-04

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