US3266208A - Scaffolding - Google Patents

Scaffolding Download PDF

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Publication number
US3266208A
US3266208A US338163A US33816364A US3266208A US 3266208 A US3266208 A US 3266208A US 338163 A US338163 A US 338163A US 33816364 A US33816364 A US 33816364A US 3266208 A US3266208 A US 3266208A
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Prior art keywords
uprights
members
horizontal
couplers
upright
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Expired - Lifetime
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US338163A
Inventor
Maggs William Farnham
Mullett Frederick William
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Acrow Engineers Ltd
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Acrow Engineers Ltd
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    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04G—SCAFFOLDING; FORMS; SHUTTERING; BUILDING IMPLEMENTS OR AIDS, OR THEIR USE; HANDLING BUILDING MATERIALS ON THE SITE; REPAIRING, BREAKING-UP OR OTHER WORK ON EXISTING BUILDINGS
    • E04G7/00—Connections between parts of the scaffold
    • E04G7/02—Connections between parts of the scaffold with separate coupling elements
    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04G—SCAFFOLDING; FORMS; SHUTTERING; BUILDING IMPLEMENTS OR AIDS, OR THEIR USE; HANDLING BUILDING MATERIALS ON THE SITE; REPAIRING, BREAKING-UP OR OTHER WORK ON EXISTING BUILDINGS
    • E04G1/00—Scaffolds primarily resting on the ground
    • E04G1/15—Scaffolds primarily resting on the ground essentially comprising special means for supporting or forming platforms; Platforms
    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04G—SCAFFOLDING; FORMS; SHUTTERING; BUILDING IMPLEMENTS OR AIDS, OR THEIR USE; HANDLING BUILDING MATERIALS ON THE SITE; REPAIRING, BREAKING-UP OR OTHER WORK ON EXISTING BUILDINGS
    • E04G1/00—Scaffolds primarily resting on the ground
    • E04G1/15—Scaffolds primarily resting on the ground essentially comprising special means for supporting or forming platforms; Platforms
    • E04G1/152—Platforms made of metal or with metal-supporting frame
    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04G—SCAFFOLDING; FORMS; SHUTTERING; BUILDING IMPLEMENTS OR AIDS, OR THEIR USE; HANDLING BUILDING MATERIALS ON THE SITE; REPAIRING, BREAKING-UP OR OTHER WORK ON EXISTING BUILDINGS
    • E04G1/00—Scaffolds primarily resting on the ground
    • E04G1/15—Scaffolds primarily resting on the ground essentially comprising special means for supporting or forming platforms; Platforms
    • E04G2001/155—Platforms with an access hatch for getting through from one level to another
    • 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
    • Y10T403/30—Laterally related members connected by latch means, e.g., scaffold connectors

Definitions

  • a scatfold unit in accordance with the invention cornprises at least four uprights and at least one member which, in use, is connected so as to extend horizontally between the uprights, the connection to the uprights being effected by means ofcouplers each of which can be positioned at any desired height on its upright.
  • a structure erected from such a unit uses essentially only three different components namely the uprights, the horizontal members and the couplers, but bracing members are preferably provided for connection diagonally between uprights to rigidity the structure. Due to the few number of parts the scaffolding is economical both to produce and to erect and because of the varied heights at which the horizontal components can be positioned, the system is very flexible in its use.
  • Each horizontal member which preferably has a rectangular outline, preferably comprises two longitudinal members which may be of rectangular cross section and a number of tubes or the like connected between the longitudinal members, each end of each longitudinal member being provided with a hook which is adapted to drop into a socket on the coupler so that the connection can be made very simply.
  • Each upright is conveniently provided with a number of small blocks welded to its surface at pre-determined regular intervals.
  • the couplers can be positioned on their uprights so as to rest on a specific block and a user will then be able to achieve the exact correct position for the couplers without having to measure. Equally by choosing the same blocks on each upright the horizontal members can be maintained horizontal without measurement by the user.
  • the upper end of the upright of each unit can be adapted to receive the lower end of a similar upright so that a multi-tiered structure can be very rapidly erected.
  • the couplers may be designed to receive the hooks of a horizontal member at each side so that the structure can be extended horizontally.
  • FIGURE 1 is a isometric view of a structure made of scafifolding components in accordance with the invention
  • FIGURE 1A is an enlarged perspective view of a coupler secured to an upright and with a hook of the horizontal member secured in the coupler;
  • FIGURE 2 is a plan view of a horizontal member
  • FIGURE 3 is a side view of FIGURE 2;
  • FIGURE 4 is a perspective view of a coupler
  • FIGURE 5 is an elevation of an upright member.
  • the structure shown in the drawing comprises essentially a number of basic units each having uprights 2 the lower end of each of which is provided with a base plate 4 which is adjustable so that the structure can rest squarely on the ground.
  • Horizontal members generally indicated at 6 are connected between four adjacent uprights and each member comprises two longitudinal members 8 (see FIGURES 2 and 3) of rectangular cross section each formed at each end with a hook member 10 which engages in a slot in a coupler 12 which is adapted for connection to the uprights at any desired height.
  • longitudinal members 8 are connected together by means of a suitable number of bars 14, the example shown in the drawing having four.
  • the corners of the member may be braced with diagonal members 15.
  • the structure is rigidified where required by ties 16 connected diagonally between adjacent uprights.
  • Each upright is provided with a number of small blocks 18 (shown in FIGURES 5 and 1A, but not in FIGURE 1) welded to its surface at a predetermined distance apart so that the couplers may be correctly positioned by resting them on the blocks without any need for accurate measurement. This aids quick erection of the scafiolding and helps to ensure that the members 6 are kept horizontal.
  • the couplers 12 each comprises an adjustable clamp formed by a pivoted jaw 20 (see FIGURES 4 and 1A) and a pivoted bolt 22 the nut 24 of which engages the sides of a slot in the jaw 20 so that the jaw can be tightened around an upright 2 clamped between. a recess in the jaw 20 and a corresponding recess 26 in the body of the coupler. The coupler can thus be secured to an upright in any desired position.
  • the coupler also includes a socket 28 to receive a hook 10 on the end of a horizontal member 6, the book being securely held in the socket by means of a lock screw 30.
  • the structure can have any number of tiers the second tier as shown in the drawing having uprights 2A which are connected by means of a socket 32 on the upper end of the lower uprights 2, further horizontal units 6 being provided between the uprights 2A.
  • Ladders 34 can be hooked over the bars 14 of the horizontal members 6 as required to provide access to the upper tiers of the scafiolding.
  • the structure can be extended horizontally by providing a further unit the uprights 2 of which are connected to the uprights of the first unit 2 by means of horizontal members generally indicated at 36 which are of the same general construction as the members 6 although being somewhat shorter.
  • Planks 38 can be laid over the bars 14 of the members 6 and 34 to provide working areas and the top of the uprights 2A can be connected by bars 40' having hooked ends engaging in couplers 12, to provide a handrail.
  • the first two uprights are first held by a workman in the position where the first scaffolding unit is required and two coupling members 12 are secured around each of the two uprights so as to rest on a certain one of the blocks 18 at the required height.
  • One end of a horizontal member 6 is then secured to the couplers by a second workman by engaging the hooks 10 of the horizontal member in the slots 28 in the coupling members.
  • the other end of the horizontal member is then secured to coupling members 12 which are located on a further pair of uprights and rest on blocks 18 corresponding to those on the first pair of uprights.
  • a workman can stand on this layer while attaching further couplers 12 to the uprights: 2 ready to receive the next layer of horizontal members.
  • all that needs to be done is to select a pre-determined one of the blocks 18 which are spaced at regular intervals along the uprights, and by securing the coupling members to each of the four uprights so as to rest on corresponding blocks, the members 6 or 36 will be automatically connected in a horizontal position without the workman having to measure the height along the uprights at which the coupling members are to be secured.
  • Each lift or layer of horizontal members can be assembled from the layer immediately below using the ladders 34 when required so that a complex structure can very rapidly and easily be assembled with accurate positioning and-security of fixing.
  • the structure can be extended horizontally by connecting further pairs of uprights to the existing uprights by means of member 6 or 36.
  • Ties connecting the scaffold structure with an existing building can be connected to the scalfolding through one or more of the coupling members 12 if required.
  • Scaffolding comprising at least four uprights and at least one rectangular member which extends horizontally between the said uprights, couplers adjustably and releasably positioned on the uprights at any desired height, each coupler having a socket therein, each upright being provided with a number of small blocks on its surface at predetermined regular intervals against which the couplers engage, each of the horizontal rectangular members comprising two longitudinal members connected together by means of a number of cross bars, each longitudinal members being provided at each end with a hook engaging a socket in a coupler.
  • a structure as claimed in claim 1 in which a number of horizontal rectangular members are provided one above the other.
  • a structure as claimed in claim 1 in which a number of horizontal rectangular members are connected end to end or side by side, an additional pair of uprights being provided for each further horizontal member.
  • FRANK L. ABBOTT Primary Examiner.

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  • Engineering & Computer Science (AREA)
  • Architecture (AREA)
  • Mechanical Engineering (AREA)
  • Civil Engineering (AREA)
  • Structural Engineering (AREA)
  • Ladders (AREA)
  • Mutual Connection Of Rods And Tubes (AREA)

Description

Aug. 16, 1966 w. F. MAGGS ET Filed Jan. 16, 1964 United, States Patent 3,266,208 SCAFFOLDING William Farnham Maggs, Banstead, Surrey, and Frederick William Mullett, Thornton Heath, Surrey, England, assignors to Acrow (Engineers) Limited, London, England Filed Jan. 16, 1964, Ser. No. 338,163 Claims priority, application Great Britain, Jan. 17, 1963, 2,172/ 63 3 Claims. (Cl. 52-650) This invention relates to scaffolding.
A scatfold unit in accordance with the invention cornprises at least four uprights and at least one member which, in use, is connected so as to extend horizontally between the uprights, the connection to the uprights being effected by means ofcouplers each of which can be positioned at any desired height on its upright. A structure erected from such a unit uses essentially only three different components namely the uprights, the horizontal members and the couplers, but bracing members are preferably provided for connection diagonally between uprights to rigidity the structure. Due to the few number of parts the scaffolding is economical both to produce and to erect and because of the varied heights at which the horizontal components can be positioned, the system is very flexible in its use.
Each horizontal member which preferably has a rectangular outline, preferably comprises two longitudinal members which may be of rectangular cross section and a number of tubes or the like connected between the longitudinal members, each end of each longitudinal member being provided with a hook which is adapted to drop into a socket on the coupler so that the connection can be made very simply.
Each upright is conveniently provided with a number of small blocks welded to its surface at pre-determined regular intervals. The couplers can be positioned on their uprights so as to rest on a specific block and a user will then be able to achieve the exact correct position for the couplers without having to measure. Equally by choosing the same blocks on each upright the horizontal members can be maintained horizontal without measurement by the user.
If desired the upper end of the upright of each unit can be adapted to receive the lower end of a similar upright so that a multi-tiered structure can be very rapidly erected. Equally the couplers may be designed to receive the hooks of a horizontal member at each side so that the structure can be extended horizontally.
An example of a scaifolding in accordance with the invention is shown in the accompanying drawings in which:
FIGURE 1 is a isometric view of a structure made of scafifolding components in accordance with the invention;
FIGURE 1A is an enlarged perspective view of a coupler secured to an upright and with a hook of the horizontal member secured in the coupler;
FIGURE 2 is a plan view of a horizontal member;
FIGURE 3 is a side view of FIGURE 2;
FIGURE 4 is a perspective view of a coupler; and
FIGURE 5 is an elevation of an upright member.
The structure shown in the drawing comprises essentially a number of basic units each having uprights 2 the lower end of each of which is provided with a base plate 4 which is adjustable so that the structure can rest squarely on the ground. Horizontal members generally indicated at 6 are connected between four adjacent uprights and each member comprises two longitudinal members 8 (see FIGURES 2 and 3) of rectangular cross section each formed at each end with a hook member 10 which engages in a slot in a coupler 12 which is adapted for connection to the uprights at any desired height. The
longitudinal members 8 are connected together by means of a suitable number of bars 14, the example shown in the drawing having four. The corners of the member may be braced with diagonal members 15.
The structure is rigidified where required by ties 16 connected diagonally between adjacent uprights.
Each upright is provided with a number of small blocks 18 (shown in FIGURES 5 and 1A, but not in FIGURE 1) welded to its surface at a predetermined distance apart so that the couplers may be correctly positioned by resting them on the blocks without any need for accurate measurement. This aids quick erection of the scafiolding and helps to ensure that the members 6 are kept horizontal.
The couplers 12 each comprises an adjustable clamp formed by a pivoted jaw 20 (see FIGURES 4 and 1A) and a pivoted bolt 22 the nut 24 of which engages the sides of a slot in the jaw 20 so that the jaw can be tightened around an upright 2 clamped between. a recess in the jaw 20 and a corresponding recess 26 in the body of the coupler. The coupler can thus be secured to an upright in any desired position. v
The coupler also includes a socket 28 to receive a hook 10 on the end of a horizontal member 6, the book being securely held in the socket by means of a lock screw 30.
As will be realized on examining the drawing the structure can have any number of tiers the second tier as shown in the drawing having uprights 2A which are connected by means of a socket 32 on the upper end of the lower uprights 2, further horizontal units 6 being provided between the uprights 2A. Ladders 34 can be hooked over the bars 14 of the horizontal members 6 as required to provide access to the upper tiers of the scafiolding. Equally the structure can be extended horizontally by providing a further unit the uprights 2 of which are connected to the uprights of the first unit 2 by means of horizontal members generally indicated at 36 which are of the same general construction as the members 6 although being somewhat shorter.
Planks 38 can be laid over the bars 14 of the members 6 and 34 to provide working areas and the top of the uprights 2A can be connected by bars 40' having hooked ends engaging in couplers 12, to provide a handrail.
When the scaifolding is to be erected the first two uprights are first held by a workman in the position where the first scaffolding unit is required and two coupling members 12 are secured around each of the two uprights so as to rest on a certain one of the blocks 18 at the required height. One end of a horizontal member 6 is then secured to the couplers by a second workman by engaging the hooks 10 of the horizontal member in the slots 28 in the coupling members. The other end of the horizontal member is then secured to coupling members 12 which are located on a further pair of uprights and rest on blocks 18 corresponding to those on the first pair of uprights. Once the first layer of horizontal members has been erected a workman can stand on this layer while attaching further couplers 12 to the uprights: 2 ready to receive the next layer of horizontal members. As has been explained, all that needs to be done is to select a pre-determined one of the blocks 18 which are spaced at regular intervals along the uprights, and by securing the coupling members to each of the four uprights so as to rest on corresponding blocks, the members 6 or 36 will be automatically connected in a horizontal position without the workman having to measure the height along the uprights at which the coupling members are to be secured. Each lift or layer of horizontal members can be assembled from the layer immediately below using the ladders 34 when required so that a complex structure can very rapidly and easily be assembled with accurate positioning and-security of fixing.
The structure can be extended horizontally by connecting further pairs of uprights to the existing uprights by means of member 6 or 36.
Ties connecting the scaffold structure with an existing building can be connected to the scalfolding through one or more of the coupling members 12 if required.
We claim:
1. Scaffolding comprising at least four uprights and at least one rectangular member which extends horizontally between the said uprights, couplers adjustably and releasably positioned on the uprights at any desired height, each coupler having a socket therein, each upright being provided with a number of small blocks on its surface at predetermined regular intervals against which the couplers engage, each of the horizontal rectangular members comprising two longitudinal members connected together by means of a number of cross bars, each longitudinal members being provided at each end with a hook engaging a socket in a coupler.
2. A structure as claimed in claim 1 in which a number of horizontal rectangular members are provided one above the other.
4 3. A structure as claimed in claim 1 in which a number of horizontal rectangular members are connected end to end or side by side, an additional pair of uprights being provided for each further horizontal member.
References Cited by the Examiner UNITED STATES PATENTS 2,294,240 9/ 1942 Pollman 52-650 2,833,421 5/1958 Skubic 287-54 X 2,947,555 9/1960 Olsen 28754 3,023,833 3/1962 Hunnebeck 182179 X 3,179,212 4/1965 Gostling 211-148 X FOREIGN PATENTS 516,914 1/1953 Belgium. 265,543 10/1913 Germany. 498,840 5 1930 Germany.
FRANK L. ABBOTT, Primary Examiner.
RICHARD w. COOKE, JR., Examiner.
L. R. RADANOVIC, R. S. VERMUT,
' Assistant Examiners.
US338163A 1963-01-17 1964-01-16 Scaffolding Expired - Lifetime US3266208A (en)

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Application Number Priority Date Filing Date Title
GB2172/63A GB1046861A (en) 1963-01-17 1963-01-17 Improvements in and relating to scaffolding

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US3266208A true US3266208A (en) 1966-08-16

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CH (1) CH395502A (en)
DE (1) DE1534853A1 (en)
GB (1) GB1046861A (en)
NL (1) NL6400297A (en)

Cited By (22)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4111579A (en) * 1976-04-02 1978-09-05 North Western Scaffolding Company Limited Scaffolding
US4189810A (en) * 1977-06-23 1980-02-26 Societe Nouvelle Des Echafaudages Tubulaires Mills Assembly elements, inter alia for scaffolding
US4227831A (en) * 1978-04-04 1980-10-14 Raymond International Builders, Inc. Self-contained offshore platform
US4599010A (en) * 1983-06-10 1986-07-08 Tu-Fit (Proprietary) Limited Anchoring device
US4773506A (en) * 1984-09-20 1988-09-27 Preston John C Scaffolding module and method of erecting same
US4858726A (en) * 1984-09-20 1989-08-22 Preston John C Scaffolding module and method erecting same
US4903795A (en) * 1988-10-21 1990-02-27 Cummings Michael P Movable scaffold rung
WO1991000946A1 (en) * 1989-07-11 1991-01-24 L.F.M. Engineering Limited A clamp
US5040916A (en) * 1988-01-15 1991-08-20 Morgan Richard M Scaffold fitting
WO2002066767A1 (en) * 2001-02-22 2002-08-29 Wilhelm Layher Vermögensverwaltungs-Gmbh Connecting construction for components of a system frame, coupling unit and framework
US6554102B2 (en) * 1996-08-16 2003-04-29 Peri Gmbh Dismountable facade scaffold
US20050011135A1 (en) * 2003-07-18 2005-01-20 Stageright Corporation Variable height fold and roll staging and method of assembling same
US20050077108A1 (en) * 2003-10-14 2005-04-14 Porfirio Simoes Horizontal support member for tube and clamp scaffold assembly
US20070187179A1 (en) * 2006-02-10 2007-08-16 Porfirio Simoes Scaffold Support Bracket and Assembly
US20110174753A1 (en) * 2010-01-18 2011-07-21 Matthew Pinto Stackable transport system
US20110297483A1 (en) * 2010-06-04 2011-12-08 Breithaupt Jr Justin B Adjustable scaffold base
US20120219354A1 (en) * 2011-02-24 2012-08-30 Bauer Ryan E Cup-lock coupler clamp for detachably attaching at any elevation on a vertical tube of the cup-lock scaffold system
US20140202795A1 (en) * 2013-01-24 2014-07-24 Conxtech, Inc. Plural-story, pipe-support frame system with modular, removably attachable lateral-worker-support scaffolding
US10837230B1 (en) * 2016-07-29 2020-11-17 Johnny Curtis Ladder hoop
US11208815B2 (en) * 2018-06-01 2021-12-28 At-Pac China Business Trust Scaffold ledger
US11255095B2 (en) * 2017-05-09 2022-02-22 At-Pac China Business Trust Modified ledger and modular scaffold system with continuous work surface
US11761560B2 (en) 2020-02-19 2023-09-19 Conxtech, Inc. Modular pipe rack system

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3605386A1 (en) * 1985-06-22 1987-01-02 Huennebeck Gmbh Working platform
DE3832818C1 (en) * 1988-09-28 1989-12-14 Wolfgang 7958 Laupheim De Baumann Supporting element for a scaffolding covering

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DE265543C (en) *
BE516914A (en) *
DE498840C (en) * 1928-01-20 1930-06-02 Johann Sitz Scaffolding
US2294240A (en) * 1939-08-07 1942-08-25 Adam F Pollman Scaffolding
US2833421A (en) * 1954-04-23 1958-05-06 Paltier Corp Stacking rack
US2947555A (en) * 1954-03-15 1960-08-02 Olsen Charles Scaffold ladder clamp
US3023833A (en) * 1959-04-25 1962-03-06 Hunnebeck Emil Mauritz Scaffold
US3179212A (en) * 1962-01-30 1965-04-20 Kwikform Ltd Builders' scaffolding

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE265543C (en) *
BE516914A (en) *
DE498840C (en) * 1928-01-20 1930-06-02 Johann Sitz Scaffolding
US2294240A (en) * 1939-08-07 1942-08-25 Adam F Pollman Scaffolding
US2947555A (en) * 1954-03-15 1960-08-02 Olsen Charles Scaffold ladder clamp
US2833421A (en) * 1954-04-23 1958-05-06 Paltier Corp Stacking rack
US3023833A (en) * 1959-04-25 1962-03-06 Hunnebeck Emil Mauritz Scaffold
US3179212A (en) * 1962-01-30 1965-04-20 Kwikform Ltd Builders' scaffolding

Cited By (25)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4111579A (en) * 1976-04-02 1978-09-05 North Western Scaffolding Company Limited Scaffolding
US4189810A (en) * 1977-06-23 1980-02-26 Societe Nouvelle Des Echafaudages Tubulaires Mills Assembly elements, inter alia for scaffolding
US4227831A (en) * 1978-04-04 1980-10-14 Raymond International Builders, Inc. Self-contained offshore platform
US4599010A (en) * 1983-06-10 1986-07-08 Tu-Fit (Proprietary) Limited Anchoring device
US4773506A (en) * 1984-09-20 1988-09-27 Preston John C Scaffolding module and method of erecting same
US4858726A (en) * 1984-09-20 1989-08-22 Preston John C Scaffolding module and method erecting same
US5040916A (en) * 1988-01-15 1991-08-20 Morgan Richard M Scaffold fitting
US4903795A (en) * 1988-10-21 1990-02-27 Cummings Michael P Movable scaffold rung
WO1991000946A1 (en) * 1989-07-11 1991-01-24 L.F.M. Engineering Limited A clamp
US6554102B2 (en) * 1996-08-16 2003-04-29 Peri Gmbh Dismountable facade scaffold
WO2002066767A1 (en) * 2001-02-22 2002-08-29 Wilhelm Layher Vermögensverwaltungs-Gmbh Connecting construction for components of a system frame, coupling unit and framework
US7413365B2 (en) 2001-02-22 2008-08-19 Wilhelm Layher Vermogensverwaltungs Gmbh Connecting construction for components of a system frame, coupling unit and framework
US20050011135A1 (en) * 2003-07-18 2005-01-20 Stageright Corporation Variable height fold and roll staging and method of assembling same
US20050077108A1 (en) * 2003-10-14 2005-04-14 Porfirio Simoes Horizontal support member for tube and clamp scaffold assembly
US20070187179A1 (en) * 2006-02-10 2007-08-16 Porfirio Simoes Scaffold Support Bracket and Assembly
US20110174753A1 (en) * 2010-01-18 2011-07-21 Matthew Pinto Stackable transport system
US20110297483A1 (en) * 2010-06-04 2011-12-08 Breithaupt Jr Justin B Adjustable scaffold base
US8640827B2 (en) * 2010-06-04 2014-02-04 Justin B. Breithaupt, JR. Adjustable scaffold base
US20120219354A1 (en) * 2011-02-24 2012-08-30 Bauer Ryan E Cup-lock coupler clamp for detachably attaching at any elevation on a vertical tube of the cup-lock scaffold system
US20140202795A1 (en) * 2013-01-24 2014-07-24 Conxtech, Inc. Plural-story, pipe-support frame system with modular, removably attachable lateral-worker-support scaffolding
US9803380B2 (en) * 2013-01-24 2017-10-31 Conxtech, Inc. Plural-story, pipe-support frame system with modular, removably attachable lateral-worker-support scaffolding
US10837230B1 (en) * 2016-07-29 2020-11-17 Johnny Curtis Ladder hoop
US11255095B2 (en) * 2017-05-09 2022-02-22 At-Pac China Business Trust Modified ledger and modular scaffold system with continuous work surface
US11208815B2 (en) * 2018-06-01 2021-12-28 At-Pac China Business Trust Scaffold ledger
US11761560B2 (en) 2020-02-19 2023-09-19 Conxtech, Inc. Modular pipe rack system

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Publication number Publication date
GB1046861A (en) 1966-10-26
DE1534853A1 (en) 1969-09-04
NL6400297A (en) 1964-07-20
CH395502A (en) 1965-07-15

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