U.S. patent application number 13/008246 was filed with the patent office on 2011-05-12 for portable locking support structure.
This patent application is currently assigned to TAIT TOWERS INC.. Invention is credited to Adam DAVIS, James FAIRORTH, Michael TAIT.
Application Number | 20110110714 13/008246 |
Document ID | / |
Family ID | 38172371 |
Filed Date | 2011-05-12 |
United States Patent
Application |
20110110714 |
Kind Code |
A1 |
DAVIS; Adam ; et
al. |
May 12, 2011 |
PORTABLE LOCKING SUPPORT STRUCTURE
Abstract
A portable support structure including a platform member having
a primary platform connector and a secondary platform connector.
The primary platform connector is configured to receive a primary
support connector. The secondary platform connector is configured
to receive a secondary support connector. The support structure
also includes a primary support member including the primary
support connector and a hook member. In addition, the support
structure includes a secondary support member having a first end
and a second end. The first end is detachably engaged with the
secondary platform connector and the second end is in locking
engagement with the hook member. The primary support connector
includes structures that engage the primary platform connector and
rotationally position the primary support member. The hook member
includes a hook portion that engages and prevents the secondary
support member disengaging upon a rotation of the secondary support
member.
Inventors: |
DAVIS; Adam; (Leola, PA)
; FAIRORTH; James; (Manheim, PA) ; TAIT;
Michael; (Lititz, PA) |
Assignee: |
TAIT TOWERS INC.
Lititz
PA
|
Family ID: |
38172371 |
Appl. No.: |
13/008246 |
Filed: |
January 18, 2011 |
Related U.S. Patent Documents
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Application
Number |
Filing Date |
Patent Number |
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12388645 |
Feb 19, 2009 |
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13008246 |
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11295999 |
Dec 7, 2005 |
7703401 |
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12388645 |
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Current U.S.
Class: |
403/321 ;
403/359.1; 403/375 |
Current CPC
Class: |
Y10T 403/7026 20150115;
F16B 7/02 20130101; Y10T 403/591 20150115; Y10T 403/7073 20150115;
Y10T 29/49817 20150115; Y10T 403/58 20150115; Y10T 403/32483
20150115; Y10T 29/49623 20150115; Y10T 29/49616 20150115; E04H 3/28
20130101; F16B 2200/10 20180801; Y10T 403/7079 20150115; Y10S
403/06 20130101; Y10T 403/59 20150115; Y10T 29/49826 20150115 |
Class at
Publication: |
403/321 ;
403/375; 403/359.1 |
International
Class: |
F16B 21/00 20060101
F16B021/00; F16D 1/00 20060101 F16D001/00 |
Claims
1. A connector system comprising: a male connector having a flange
portion and a tapered portion, the tapered portion extending from
the flange portion; and a female connector configured to be engaged
to the male connector, the female connector having a tapered cavity
corresponding to the tapered portion of the male connector.
2. The system of claim 1, wherein the male connector comprises a
flared end.
3. The system of claim 2, wherein the flared end includes a
plurality of channels.
4. The system of claim 3, wherein the plurality of channels are
arranged in a direction substantially perpendicular to a connector
center axis.
5. The system of claim 1, further comprising an attachment portion,
the attachment portion extending from the flange portion.
6. The system of claim 5, wherein the attachment portion is
substantially cylindrical.
7. The system of claim 5, further comprising a support member
attached to the attachment member.
8. The system of claim 1, further comprising a retention device,
the retention device configured to maintain the male connector and
the female connector in an engaged position.
9. The system of claim 8, wherein the male connector and the female
connector are manually releasable from the engaged position.
10. The system of claim 1, wherein the tapered cavity and the
tapered portion distribute forces in the connector system.
11. A connector comprising: a flange portion and a tapered portion,
the tapered portion extending from the flange portion and including
a flared end.
12. The system of claim 11, wherein the flared end includes a
plurality of channels.
13. The system of claim 12, wherein the plurality of channels are
arranged in a direction substantially perpendicular to a connector
center axis.
14. The connector of claim 14, wherein the connector is a male
connector.
15. A connector, comprising: a tapered cavity, the tapered cavity
configured to engage a tapered portion of a corresponding
connector.
16. The connector of claim 15, further comprising a retention
device, the retention device configured to maintain the connector
and the corresponding connector in an engaged position.
17. The connector of claim 15, wherein the retention device is
manually releasable.
18. The connector of claim 15, wherein the connector is a female
connector.
19. The connector of claim 15, wherein the tapered cavity is
configured to engage a flared end of the corresponding
connector.
20. The connector of claim 15, wherein engagement of the flared end
by the tapered cavity prevents rotational movement.
Description
CROSS-REFERENCE TO RELATED APPLICATIONS
[0001] The present application is a continuation of U.S.
application Ser. No. 12/388,645, now pending, filed Feb. 19, 2009,
which is a divisional of U.S. application Ser. No. 11/295,999, now
U.S. Pat. No. 7,703,401, filed Dec. 7, 2005, each of which are
hereby incorporated by reference in its entirety.
FIELD OF THE INVENTION
[0002] The present invention is directed to portable support
structures. In particular, the present invention is directed to a
portable stage or platform.
BACKGROUND OF THE INVENTION
[0003] Portable structures, such as stages or platforms, must be
capable of breaking down into relatively small units that can be
loaded onto trucks or airplanes for transport. In addition, the
portable structures must be capable of assembly in a short amount
of time, by personnel having little or no technical skill. The
above benefits must be provided while providing a platform that is
capable of holding a large amount of weight and does not sway or
bend during use.
[0004] Locking mechanisms for supports have typically utilized pins
and/or latches. The locking mechanisms for supports known in the
art suffer from the drawback that they are difficult to assemble,
are subject to misalignment, causing instability in the platforms,
and require a plurality of pieces, each of which must be assembled
together to produce the platform.
[0005] What is needed is a portable platform structure that is
easily assembled and disassembled with little or no technical
skill, having a stable structure that resists deflection when
bearing a load, where the structure does not suffer from the
drawbacks of the prior art.
SUMMARY OF THE INVENTION
[0006] The present invention includes a portable support structure
including a platform member having a primary platform connector and
a secondary platform connector. The primary platform connector is
configured to receive a primary support connector. The secondary
platform connector is configured to receive a secondary support
connector. The support structure also includes a primary support
member including the primary support connector and a hook member.
In addition, the support structure includes a secondary support
member having a first end and a second end. The first end is
detachably engaged with the secondary platform connector and the
second end is in locking engagement with the hook member. The
primary support connector includes a tapered portion and an
alignment portion. The tapered portion engages a surface in the
primary platform connector and the alignment portion engages an
alignment member disposed in the primary platform connector. The
engagement of the primary support connector with the primary
platform connector rotationally positions the primary support
member.
[0007] Another embodiment of the present invention includes a
portable support structure including a platform member having a
primary platform connector and a secondary platform connector. The
primary platform connector is configured to receive a primary
support connector. The secondary platform connector is configured
to receive a secondary support connector. The support structure
also includes a primary support member including the primary
support connector and a hook member. In addition, the support
structure includes a secondary support member having a first end
and a second end. The first end is detachably engaged with the
secondary platform connector and the second end is in locking
engagement with the hook member. The hook member includes a hook
portion having a geometry capable of receiving the second end of
the secondary support member. In addition, the hook portion engages
the secondary support member in a position that prevents
disengagement when the secondary support member is rotated.
[0008] Still another embodiment of the present invention includes a
connector system for connecting components for assembly of a
support structure. The connector system includes a support
connector having a tapered portion and an alignment portion. In
addition, the connector system includes a platform connector having
a cavity configured to receive the support connector. The tapered
portion engages a surface in the platform connector and the
alignment portion engages an alignment member disposed in the
primary platform connector to rotationally position the support
connector.
[0009] Still another embodiment of the present invention includes a
connector system for connecting components for assembly of a
support structure. The connector system includes a body configured
to attach to a first support member. A hook portion is attached to
the body and has a geometry that is capable of receiving a
secondary support member. In addition, the hook portion engages the
secondary support member in a position that prevents disengagement
when the secondary support member is rotated.
[0010] One advantage of the present invention is that support
structures, such as stages or platforms may be assembled and
disassembled repeatedly, while providing a substantially rigid
support structure that may support a substantial load when
assembled.
[0011] Another advantage of the present invention is that the
individual structural members individually may be interchanged,
reducing the possibility for assembly error in the assembly of the
multi-level structure.
[0012] Still another advantage of the present invention is that the
load applied to the platform is supported by the support structure,
allowing the structure to maintain stability, without swaying or
bending, including when lateral forces are present.
[0013] Yet another advantage of the present invention is that the
structure members are configured to prevent misalignment, allowing
personnel having little or no technical skill to correctly align
the various components while maintaining a structure that is stable
and is resistant to swaying or bending.
[0014] Still yet another advantage of the present invention is that
a force is provided that retains the primary support member in
position during installation, making the installation easier and
does not undesirably disassemble when the platform structure is
lifted.
[0015] A further advantage of the present invention is that an
assembler of the portable support structure may position and lock
the secondary support member while remaining in a standing
position, making the installation quicker and less burdensome on
the assembler.
[0016] A further advantage of the present invention is that the
portable support structure occupies less space when disassembled
than stages previously known in the art, permitting the use of less
storage space, providing further advantages, such as fewer
tractor-trailers to transport the stage by land, less cargo space
in aircraft when transporting the portable support structure by air
and less overall transportation costs.
[0017] A further advantage of the present invention is that the
secondary support members may be installed subsequent to the
installation of the primary support members, and may be omitted in
applications where the primary support members provide sufficient
support for the platform members.
[0018] Other features and advantages of the present invention will
be apparent from the following more detailed description of the
preferred embodiment, taken in conjunction with the accompanying
drawings which illustrate, by way of example, the principles of the
invention.
BRIEF DESCRIPTION OF THE DRAWINGS
[0019] FIG. 1 shows a perspective view of a portable support
structure according to an embodiment of the present invention.
[0020] FIG. 2 shows a perspective cutaway view of a portable
support structure according to an embodiment of the present
invention.
[0021] FIG. 3 shows a perspective view of a primary and secondary
support system according to an embodiment of the present
invention.
[0022] FIG. 4 shows a cutaway view of a portable support structure
according to an embodiment of the present invention.
[0023] FIG. 5 shows a primary support member according to an
embodiment of the present invention.
[0024] FIGS. 6A and 6B show respective top and side views of a
secondary support member according to an embodiment of the present
invention.
[0025] FIGS. 7A, 7B and 7C show orthogonal cutaway views of a
secondary support connector according to an embodiment of the
present invention.
[0026] FIG. 8 shows a perspective view of a secondary support
connector according to an embodiment of the present invention.
[0027] FIG. 9 shows a perspective view of a hook member according
to an embodiment of the present invention.
[0028] FIG. 10 shows a perspective view of a secondary support
member in locking engagement with a hook member according to an
embodiment of the present invention.
[0029] FIG. 11 shows an elevation view of a primary support
connector according to an embodiment of the present invention.
[0030] FIG. 12 shows a perspective view of a primary support
connector according to an embodiment of the present invention.
[0031] FIG. 13 shows an elevation view of a primary platform
connector according to an embodiment of the present invention.
[0032] FIG. 14 shows a perspective view of a primary platform
connector according to an embodiment of the present invention.
[0033] FIG. 15 shows an enlarged, partial elevation view of a
primary support connector and primary platform connector engaged
according to an embodiment of the present invention.
[0034] Wherever possible, the same reference numbers will be used
throughout the drawings to represent the same parts.
DETAILED DESCRIPTION OF THE INVENTION
[0035] FIG. 1 shows an assembled portable support structure 100
having a continuous surface formed from a plurality of platform
members 101 attached to each other along one or more surfaces that
may be disassembled into smaller components, which preferably have
a size and geometry suitable for storage or transportation.
Platform members 101 may attach to each other by any suitable means
including, but not limited to, latches, fasteners or other
attachment devices that may be disassembled for storage or
transportation. The smaller components may include single platform
members 101 having associated primary support members 105 and
secondary support members 103. The primary support member 105 is
preferably a leg, column, tube, cylinder or other elongated
structure provided at a substantially perpendicular angle to the
platform member 101 capable of bearing a load from the platform
member 101. The secondary support member 103 is preferably bar,
tube, cylinder or other elongated structure provided at an angle to
the platform member 101 for providing lateral support to the
primary support member 105. The portable support structure 100
includes platform members 101, primary support members 105 and
secondary support members 103 disattachably connected to provide
structural support for the platform member 101. As used herein,
"detachably engaged" or the like refers to the ability to
disconnect support members without having to first change the
angular orientation between the support, i.e., rotate one support
member with respect to the other support member. The primary
support members 105 are detachably engaged to a primary platform
connector 401 (see e.g., FIG. 4), which is attached to platform
member 101. Engagement between components of the present invention
includes interlocking of the components and/or contact between
components, and may include retention of one or more components in
a given position either by force of gravity or by interaction
between mechanical components, which may be released or detached
with the application of a force by hand or by mechanical device.
Although platform member 101 is shown with a rectangular geometry,
the present invention is not limited to a rectangular geometry. The
platform member 101 may be fabricated into any geometry that
provides the desired support for the portable support structure 100
and is easily stored and/or transported. The secondary support
members 103 are detachably engaged at one end with the secondary
platform connector 403 (see FIG. 4). The secondary support members
103 are also in locking engagement with hook member 107 attached to
the primary support member 105. As used herein, "locking
engagement" refers to an engagement between support members that
can only be supported by changing the angular orientation of one
support member with respect to the other support member, i.e., by
rotation. A rotatable wheel or caster 109 may be included at one
end of the primary support member 105 in order to provide the
portable support structure 100 with added mobility. Although the
primary support member 105 has been shown including a caster 109,
the present invention is not limited to a caster 109. The primary
support member 105 may be any suitable structure for contacting a
foundation surface, including, but not limited to, a fixed wheel, a
skid, footing or other structure suitable for providing support and
transferring and distributing the load provided by the portable
support structure 100.
[0036] FIG. 2 shows a unit including only a single platform member
101 from the portable support structure 100. Platform member 101
may include platform supports 201 in order to provide additional
support over the length of the platform member 101. Like shown and
described with respect to FIG. 1, connection of primary platform
connector 401 to the platform member 101 is detachably engaged with
a primary support connector 301. Likewise, secondary support
members 103 are detachably engaged with the secondary platform
connector 403. In addition, secondary support members 103 are in
locking engagement with the hook member 107 attached to the primary
support member 105. The single unit having the four primary support
members 105 and the eight secondary support member 103 shown in
FIG. 2 is self supporting and may be moved as a unit when being
assembled with other units and may be attached to other units
having platform members 101, as shown and described with respect to
FIG. 1. The number of primary support members 105 and secondary
support members 103 is not limited to the arrangement shown in FIG.
2. Any number of primary support members 105 and secondary support
member 103 supporting the platform member 101 may be used in the
portable support structure according to the present invention. In
addition, some or all of the secondary support members 105 may be
omitted, where the support provided by the primary support member
105 is sufficient to provide the desired support the platform
member 101.
[0037] FIG. 3 shows a more detailed view of the components of the
portable support structure 100 with the platform member 101
removed. As shown in FIGS. 1 and 2, the secondary support members
103 are in locking engagement with the hook member 107, which is
preferably attached adjacent to one end of the primary support
member 105. In addition, FIG. 3 shows a primary support connector
301 at one end of the primary support member 105, preferably
opposite the hook member 107. Primary support connector 301 has a
geometry that detachably engages the primary platform connector 401
(not shown in FIG. 3), which is attached to the platform member 101
(see FIG. 4). Further, FIG. 3 shows a secondary support connector
303 at each end of the secondary support member 103. The secondary
support connector 303 detachably engages the secondary platform
connector 403 (not shown in FIG. 3), which is attached to the
platform member 101 (see FIG. 4). In addition, secondary support
connector 303 is in locking engagement with the hook member 107.
The secondary support connector 303 may be an eyelet, as shown in
FIG. 3, but may include any suitable structure suitable for
detachably engaging the secondary platform connector 403.
[0038] FIG. 4 shows a cutaway view of the portable support
structure 100. The primary support connector 301 at one end of the
primary support member 105 is detachably engaged with a primary
platform connector 401. The secondary support connector 303 of the
secondary support member 103 is detachably engaged with the
secondary platform connector 403. The secondary support connector
303 distal from the end of the secondary support member 103 engaged
with the secondary platform connector 403 is in locking engagement
to the hook member 107. The secondary support connector 403 at the
distal end of the secondary support member 103 from the hook member
107 is engaged with the secondary platform connector 403 and is
capable of providing non-vertical support for the primary support
member 105. The angle of the support member 103 with respect to the
primary support member 105 is preferably an angle of sufficient
magnitude to maintain a platform surface 405 suitable for use as a
stage, platform, decking or other raised structure that is capable
of bearing the weight of equipment and/or people.
[0039] FIG. 5 shows an enlarged, more detailed, cutaway view of the
portable support structure 100 without a secondary support member
103. The primary support connector 301 is detachably engaged with
primary platform connector 401. The primary platform connector 401
includes a retention device 507, which provides a retaining force
on the primary support connector 301, which detachably retains
engagement of the primary support connector 301 and the primary
support member 105, particularly during assembly of the portable
structure support system 100. Although the retention device 507
provides sufficient force to retain engagement of the primary
support member 105, and the primary support connector 301, the
retention device 507 is releasable under a force, such as a manual
force that would be applied by hand or by mechanical device during
disassembly of the portable structure support system 100. The
primary support connector 301 includes an attachment portion 503, a
tapered portion 504 and an alignment member 505. The attachment
portion 503 extends from the tapered portion 504 and provides a
surface to which the primary support member 105 may be attached.
The attachment portion 503 of the primary support connector 301 may
be attached to the primary support member 105 by any suitable
means, including, but not limited to, adhesive, welding, threaded
engagement, cross pins, heat shrink fitting or other any other
suitable attachment method. The tapered portion 504 preferably has
a frusto-conical shape that engages the primary platform connector
401 and provides support to the platform member 101. The primary
platform connector 401 provides a surface that engages the tapered
portion 504 of the primary support connector 301 to distribute the
force from the platform member and maintain the engagement of the
primary platform connector 401 and the primary support connector
301. This primary support connector 401 geometry allows for little
or no platform deflection of the primary support member 105 with
respect to the platform member 101. Platform deflection is a change
in the angle between the primary support member 105 and the
platform member 101 when the platform member 101 is subjected to a
load. Sources of deflection may include, for example, disengagement
of the primary support connector 301 and the primary platform
connector 401, a large load on the platform member 101 or a large
lateral force on the platform member 101, substantially
perpendicular to the primary support member 105.
[0040] FIG. 5 also shows primary support member 105 including hook
member 107 attached at a position along the length of the primary
support member 105, but preferably adjacent an end and opposite the
attachment portion 503. The hook member 107 is positioned on the
primary support member 105 such that a secondary support member 103
(See FIG. 4) may be placed in locking engagement with the hook
member 107 and in detachable engagement with the secondary platform
connector 403. The hook member 107 includes a plurality of hook
portions 501 which may engage secondary support connector 303 in
locking engagement. The attachment of the hook member 107 to the
primary support member 105 may be any attachment means suitable for
receiving force transferred by the secondary support member 103
when the secondary support member 103 is in locking engagement.
Suitable attachment means for attaching the hook member 107 to the
primary support member 105 include, but are not limited to,
clamping, applying adhesive, set screws or other mechanical
portions, heat shrink (thermal interference fit) or welding.
[0041] FIGS. 6A and 6B illustrate two views of a secondary support
member 103 according to an embodiment of the invention. FIGS. 6A
and 6B show support member 103 having a substantially cylindrical
geometry including two ends that each include secondary support
connectors 303 in the form of eyelets. The secondary support member
103 may have any suitable geometry that is capable of transferring
force from the platform member 101 to the primary support member
105 when the portable support structure 100 is assembled (see, for
example, FIG. 4). As discussed above with respect to FIG. 3, the
secondary support connectors 303 may include any structure that is
suitable for engaging the secondary platform connector 403 and the
hook member 107 on the primary support member 105. The secondary
support connectors 303 at the each end of the secondary support
members 103 may be the same, or the secondary support connector 303
connectors may be different from each other. In addition, secondary
support connectors 303 may be configured in any suitable geometry
that includes one end that is capable of detachably engaging the
secondary platform connector 403 and one end that is capable of
being in locking engagement to the hook member 107.
[0042] FIGS. 7A, 7B and 7C show cutaway views of secondary platform
connectors 403 according to embodiments of the invention. FIGS. 7A,
7B and 7C show a platform attachment portion 701 that attaches to
the platform member 101 (not shown in FIGS. 7A, 7B or 7C). In
addition, FIGS. 7A, 7B and 7C show a connector post portion 703
extending from the platform attachment portion 701. The connector
post portion 703 is not limited to the cylindrical geometry having
a tapered end shown, but may include any geometry that is capable
of receiving and supporting the secondary support member 103 and
reacting to a force from the platform member 101 through the
secondary support member 103 to the primary support member 105
through the hook member 107. FIGS. 7A, 7B and 7C show an embodiment
of the invention wherein a retention portion 705 has a
substantially rectangular geometry with a rounded end 709 and a
notched end 711 that permits the passage of the secondary support
connector 303 in one direction, but prevents disengagement from the
secondary platform connector 403 once the secondary support
connector 303 is in an engaged position. The retention portion 705
shown in FIGS. 7A, 7B and 7C rotatably retracts when the secondary
support connector 303 of the secondary support member 103 is
directed over the connector post portion 703 of the secondary
platform connector 403 and reextends once the secondary support
member 103 is in an engaged position by force of gravity.
Reextension of the retention portion 705 prevents disengagement of
the secondary support member 103 from the secondary platform
connector 403. The retention portion 705 extends substantially
perpendicular to the connector post portion 703 and provides an
engagement surface 707 that contacts and retains the secondary
support connector 303 when the secondary support member 103 is
engaged with the secondary platform connector 403. The retention
portion 705 is not limited to the geometry shown in FIGS. 7A, 7B
and 7C, but may be any geometry that permits the engagement of the
secondary support connector 303 of the secondary support member 103
and prevents disengagement and is releasable under a force, such as
a manual force that would be applied by hand or mechanical device
during disassembly of the portable structure support system
100.
[0043] FIG. 8 shows a perspective view of a secondary platform
connector 403 according to an embodiment of the present invention
shown with a secondary support member 103 (shown in broken lines)
when the secondary support member 103 is in an engaged position.
When the secondary support member 103 is directed into engagement,
the retention portion 705 yields by rotating about an axis defined
by a pin 713 into a position into a slot 715 in the connector post
portion 703 that permits the passage of the secondary support
connector 303 over the retention portion 705. Reextension of the
retention portion 705 takes place by rotation about the pin 713
axis out of the slot 715 via gravity once the secondary support
member 103 is in an engaged position. The reextension may also be
assisted by a force-providing device, such as a spring. Once the
retention portion reextends, disengagement of the secondary support
member 103 from the secondary platform connector 403 is
substantially prevented. To disengage the secondary support member
103, the retention portion 705 may be manipulated by hand or
mechanical device to rotate into the connector post portion 703,
which permits the secondary support connector 303 to be directed
away from the platform attachment portion 701 and to disengage from
the secondary platform connector 403. The connection between the
secondary platform connector 403 and the secondary support
connector 303 is a detachable connection (i.e., detachable
engagement), because the angular orientation between the secondary
support member 103 and secondary platform connector 403 is not
required to change to the effect disconnection therebetween.
[0044] FIG. 9 shows a hook member 107 according to an embodiment of
the present invention. As shown and described with respect to FIG.
5, the hook member 107 includes a plurality of hook portions 501.
The hook portions 501 extend from a hook member attachment portion
901. The hook member attachment portion 901 includes a geometry
that is suitable for attachment to the primary support member 105.
The attachment portion 901 embodiment shown in FIG. 9 includes a
pair of clamp-like structures that are fastened together by
fasteners 903. The attachment portion 901 includes an attachment
surface 909 that attaches to the primary support member 105 (See
FIG. 5) upon sufficient engagement of fasteners 903 to draw the
attachment surfaces 909 into compressive contact with the primary
support member 105. The attachment portion 901 is not limited to
the geometry shown in FIG. 9, and may include any geometry that
permits the attachment of the hook member 107 to the primary
support member 105. The attachment of the hook member 107 to the
primary support member 105 may take place using any suitable
method, including frictional attachment provided by fasteners 903,
adhesive, thermal shrink fit, welding or providing a unitary
primary support member 105 having the structure of the hook member
107 integrally included. Although FIG. 9 shows four hook portions
501, the hook member 107 may include any number of hook portions
501 and may include a hook portion 501 for each support member 107
that is in locking engagement with the hook member 107.
Additionally, the hook members 107 may be fabricated with a
symmetrical arrangement of hook portions 501, such as the four hook
portions 501 shown in FIG. 9, for ease of assembly and alignment of
the primary support member 105 when the portable support structure
100 is assembled. The hook portions 501 include a curved portion
905 that has a radius of curvature that allows a secondary support
connector 303 of a secondary support member 103 to be directed over
the hook portion 501. The curved portion includes an engagement
surface 907 that is capable of engaging the secondary support
connector 303 and reacting to forces transmitted through the
secondary support member 103. When the secondary support connector
303 is in position and in engagement with the engagement surface
907, the curved portion 905 locks the secondary support connector
303 in place and prevents disengagement, thereby retaining the
secondary support member 103 in locking engagement.
[0045] FIG. 10 shows a perspective view of the installation of the
secondary support member 103 onto the hook member 107 during the
assembly of the portable support structure 100. During the assembly
of the portable support structure 100, the secondary support
connector 303 of a secondary support member 103 is directed over a
hook portion 501 of the hook member 107. The direction of the
secondary support member is shown as arrow 1001, where the
secondary support connector 303 is first aligned with the hook
portion 501 and the secondary support connector 303 is then
directed over the hook portion 501 and rotated over the curved
portion 905 to engage engagement surface 907 where the secondary
support connector 303 of the secondary support member 103 is in
locking engagement (shown in broken lines) with the hook member
107. Locking engagement refers to the requirement that a change in
angular orientation must occur between the secondary support
connector 303 and the hook portion 501 to effect separation
therefrom. Disengagement of the secondary support member 103 from
the hook member 107 preferably takes place using an opposite motion
as the arrow 1001 shown in FIG. 10. In addition, disengagement of
the secondary support member 103 may be performed remotely,
including, but not limited to, rotation of the secondary support
member 103 from the distal end of the secondary support member 103
by personnel disassembling the portable support structure 100.
Remote disengagement of the secondary support member 103 from the
hook member 107 may permit personnel to disassemble the portable
support structure 100 from a standing position or kneeling
position, which reduces or eliminates the need from personnel to
repetitively bend to disassemble the portable support structure
100.
[0046] FIG. 11 shows an enlarged cutaway view of a primary support
connector 301 according to an embodiment of the present invention.
The primary support connector 301 includes attachment portion 503
attached to flange portion 1103. As shown and described with
respect to FIG. 5, the primary support member 105 is attached to
the primary support connector 301. The primary support connector
301 further includes a tapered portion 504 extending from the
flange portion 1103 that abuts an end of the primary support member
105. The tapered portion 504 includes an outer surface 1102, which
is configured to engage a mating inner surface 1303 of the primary
platform connector (see e.g., FIG. 15). The alignment member 505 is
positioned at one end of the tapered portion 504. Alignment member
505 is configured to provide rotational alignment to the primary
support connector 301 and the attached primary support member 105.
The alignment member 505 includes an alignment channel 1105 for
engaging an alignment pin 1307 (see FIG. 15) and retaining the
primary support connector 301 in a fixed rotational position. The
alignment channel 1105 is formed as a cavity in the alignment
member 505 that is arranged in a direction substantially
perpendicular to a connector center axis 1107 of the primary
support connector 301.
[0047] FIG. 12 shows a perspective view of a primary support
connector 301 according to an embodiment of the present invention.
As shown and described in FIG. 11, the primary support connector
301 includes an attachment portion 503 attached to a flange portion
1103. The attachment portion 503 and flange portion 1103 have a
substantially cylindrical geometry. Tapered portion 504 extends
from the flange portion 1103 to alignment member 505. The tapered
portion 504 has a substantially frusto-conical geometry, which has
an outer surface 1102, which is configured to engage the inner
surface 1303 of the primary platform connector 401 (see e.g., FIG.
15). The alignment member 505 includes alignment channels 1105 for
engagement with the alignment pin 1307 (see e.g., FIG. 15).
Although FIG. 12 shows two intersecting alignment channels 1105,
any number of channels or a single channel may be used. The number
of channels preferably corresponds to the number of alignment
positions desired for the primary platform connector 301 and the
attached primary support member 105.
[0048] FIG. 13 shows an enlarged cutaway view of a primary platform
connector 401 according to an embodiment of the present invention.
The primary platform connector 401 includes a platform connector
cavity 1301, which is configured with an inner surface 1303 to
receive and engage the tapered portion 504 of the primary support
connector 301. Alignment pin 1307 is positioned at a substantially
perpendicular angle to the platform connector center axis 1309
within the primary platform connector 401 in a location such that
the alignment pin 1307 engages the alignment channel 1105 of the
primary support connector 301 when the primary support connector
301 is engaged with the primary platform connector 401. The primary
platform connector 401 further includes a retention device 507,
which provides a retaining force on the primary support connector
301, which holds the primary support connector 301 and the primary
support member 105 in place, particularly during assembly of the
portable support structure 100. The retention device 507 may
include a tension providing device 1306 and a retainer ball 1305.
The tension-providing device 1306 according to the present
invention may be any device capable of providing a tensional force
that may be translated through the retainer ball 1305, which
retains the primary support connector 301 in position. A suitable
tension-providing device includes, but is not limited to, a spring.
The present invention is not limited to a retainer ball 1305 having
the geometry shown in FIG. 13, but may include any geometry capable
of engaging the alignment member 505 and the tapered portion 504
retaining the primary support connector 301 in position during the
assembly of the portable support structure 100.
[0049] FIG. 14 shows a perspective view of a primary platform
connector 401 according to an embodiment of the present invention.
As shown and described in FIG. 13, the primary platform connector
401 includes a platform connector cavity 1301 at one end of the
primary platform connector 401. The primary platform connector 401
has a substantially rectangular geometry that includes retention
device 507 extending from one surface of the primary platform
connector 401. Although the primary platform connector 401 shown in
FIG. 14 is substantially rectangular, the primary platform
connector 401 may be any geometry that can be attached to a
platform member 101 (not shown in FIGS. 13-14) and can receive a
primary support connector 301. The attachment of the primary
platform connector 401 to the platform member 101 may take place
using any suitable method including, but not limited to, adhesive,
welding, mechanical fasteners, thermal interference (shrink fit),
forming a unitary platform member 101 including the structure of
the primary platform connector 401.
[0050] FIG. 15 shows a cross-sectional view of a primary support
connector 301 engaged with a primary platform connector 401
according to an embodiment of the present invention. Outer surface
1102 of the primary support connector 301 engages the inner surface
1303 of the primary platform connector 401. The alignment pin 1307
of the primary platform connector 401 engages the alignment channel
1105 of the primary support connector 301 and substantially
prevents rotation of the primary support connector 301 and the
attached primary support member 105 (not shown in FIG. 15).
Retention device 507 provides a retaining force on the primary
support connector 301 at the junction between the alignment member
505 and tapered portion 504 to retain the primary support connector
301 inside the primary platform connector 401 and maintain the
angular orientation of primary support member 105 with respect to
axis 1107. The retention is preferably sufficient to maintain the
engagement during assembly of the portable structure support system
100. A portion of the flange portion 1103 of the primary support
connector 301 engages a portion of the primary platform connector
401 and provides a stop or abutting surface, which aligns the
primary support connector 301 and provides additional support to
the primary platform connector 401. The combination of the
alignment by use of the alignment pin 1307 and the alignment
channel 1105, the retention device 507 and the engagement of the
outer surface 1102 with the inner surface 1303 provides an engaged
structure capable of supporting a platform member 101 for a stage,
platform or other structure capable of bearing the load of people
and/or equipment. This combination also provides easy assembly of
the portable support structure 100 allowing the primary support
member 105 to remain engaged while the secondary support members
103 are being positioned and allowing the primary support members
105 to remain engaged to the platform members 101 during lifting of
the platform members, such as the lifting that may occur during
assembly of the portable support structure 100. In addition, this
engagement of the primary support connector 301 and the primary
platform connector 401 is releasable under a force, such as a
manual force that would be applied by hand or mechanical device
during disassembly of the portable structure support system
100.
[0051] The portable support structure 100 may include a plurality
of platform members 101, including primary support connectors 401
and secondary platform connectors 403, primary support members 105,
including primary support connectors 301, secondary support members
103, including secondary support connectors 303, may be fabricated
each with substantially identical dimensions or marked with an
identifier, such as colors, in order to allow the individual
structural members to be interchanged, reducing the possibility for
assembly error in the assembly of the multi-level structure. The
interchangability of the various components permits easy assembly
by persons having little or no technical skill.
[0052] The tapered geometry of the primary support connector 301
and the angle of the secondary support member 103 distributes
forces from the platform member 101 allowing the structure to
maintain stability, without platform deflection. In addition, the
angled structure provides considerable lateral support to react
lateral forces that may be present. The tapered geometry of the
primary support connector 301 permits the platform member 101 and
the primary support member 105 to be engaged prior to engaging the
secondary support member 103. The tapered geometry provides the
sufficient vertical and lateral support to support the platform
member 101, even in the absence of secondary support members 103.
This support permits the engagement of the primary support members
105, while the secondary support members 103 may be engaged at a
later time. The later installation of the secondary support member
103 permits the assemblers of the portable support structure 100 to
assemble the support structure more efficiently and in less time.
In one embodiment of the invention, the secondary support members
103 may be omitted and the primary support members 105 provide the
entire structural support for the platform member 101.
[0053] The tapered geometry of the primary support connector 301
and the presence of the retention device 507 also helps prevent
misalignment of the structural members and allows people having
little or no technical skill to correctly align the various
components while maintaining a structure that is stable. In
addition, the retention device 507 provides a force that retains
the leg member in position during installation, making the
installation easier. In particular, the retention device 507
provides a structure that does not undesirably disassemble when
platform structure is raised or lifted, such as the raising or
lifting that may occur during the assembly of the portable support
structure 100.
[0054] The hook member 107 according to the present invention
provides a releasable locking mechanism onto which the secondary
support members 103 are easily and quickly installed. The hook
portions 501 of the hook member 107 permit the installation and the
locking engagement of the secondary support member 103 wherein the
assembler of the portable support structure 100 may position and
lock the secondary support member 103 while remaining in the
standing position, making the installation quicker and less
burdensome on the assembler, reducing back-related injuries caused
by repetitive tasks.
EXAMPLE
[0055] Table 1 shows the assembly time ratio for an Example
according to an embodiment of the invention and a Comparative
Example according to a prior art portable support structure. The
assembly time ratio is defined as total assembly time, in
man-hours, divided by the portable support structure platform size
in 1000 ft.sup.2. Both the Example and Comparative Example are
portable structures forming a platform 60 feet long, 40 feet wide,
with a height (i.e., platform elevation) of 5 feet. The Example
according to the present invention utilizes the portable support
structure 100 having both the primary support members 105 and
secondary support members 103, which assemble substantially as
shown in FIG. 1. Comparative Example includes a prior art portable
support structure, including known primary and secondary supports,
utilizing known connections.
TABLE-US-00001 TABLE 1 Assembly Time to Man-Hours Time Ratio
Portable Assemble for Assembly (Man- Structure Entire of Entire
Hours/1000 Length Width Platform Structure Number of Structure
ft.sup.2 of (ft) (ft) Size (ft.sup.2) (hours) Assemblers (hours)
platform) Example 60 40 2400 0.75 3 2.25 0.94 Comparative 60 40
2400 1 6 6 2.5 Example
[0056] As shown in Table 1, the Example according to the present
invention has an assembly time ratio of 0.94, which is about 62.4%
lower than the assembly time ratio of the Comparative Example of
2.5. The total time to assemble the 2400 ft.sup.2 portable support
structure is 45 minutes (0.75 hours), with three assemblers,
corresponding to 2.25 man-hours to assemble the 2400 ft.sup.2
structure. The prior art Comparative Example assembles in 1 hour,
with six assemblers, corresponding to six man-hours to assemble the
2400 ft.sup.2 structure. The assembly of the Example portable
support structure is accomplished with less assemblers, three
compared to six for the Comparative Example. In addition, the
Example is assembled in less total time, 0.75 hours compared to 1
hour for the Comparative Example.
[0057] Table 2 shows the storage space ratios of the Example and
Comparative Examples. As discussed above with respect to the
assembly time ratio, the Example and Comparative Example have
platforms of substantially identical size (i.e., 40 feet wide, 60
feet long, 5 feet high and total platform area of 2400 ft.sup.2).
The Example according to the present invention utilizes the
portable support structure 100 having both the primary support
members 105 and secondary support members 103, which assemble
substantially as shown in FIG. 1. Comparative Example includes a
prior art support structure, including known primary and secondary
supports, utilizing known connections. The storage space is the
length of a standard tractor-trailer utilized to store the
disassembled portable support structure at a substantially maximum
packing density. A standard tractor-trailer is defined as the type
of tractor-trailer typically used for transportation of concert
stages, having a storage space width of about 100 inches and a
storage space height of about 110 inches. The storage space ratio
is defined as the length of storage space utilized to store the
portable support structure (i.e., the length of the
tractor-trailer) at a substantially maximum packing density divided
by 1000 ft.sup.2 of platform area.
TABLE-US-00002 TABLE 2 Storage Space Portable Ratio Structure
Storage (storage Length Width Platform Length length/1000 (ft) (ft)
Height Size (ft.sup.2) (ft) ft.sup.2) Example 60 40 5 2400 27.25
11.35 Comparative 60 40 5 2400 38 15.83 Example
[0058] As shown in Table 2, the Example according to the present
invention has a storage space ratio of 11.35, which is about 28.3%
lower than the storage space ratio of the Comparative Example of
15.83. The storage of the 2400 ft.sup.2 portable support structure
of Example is accomplished in 27.25 ft of storage length, which is
10.75 ft less than the 38 feet utilized for the 2400 ft.sup.2
portable support structure of Comparative Example. Similar storage
efficiencies would be achieved in the cargo holds of aircraft,
ships or other transportation vehicles.
[0059] Time for assembly and disassembly of the portable support
structure 100 of the present invention is significantly reduced
compared to known systems. In industries, such as the music
industry, labor is a significant percentage of the cost relating to
production of concert events and the like. The portable support
structure 100 according to the present invention may utilize at
least 50% fewer personnel to assemble and disassemble the portable
support structures 100 than a prior art portable support structure.
The time to assemble/disassemble the portable support structures
100 is also reduced, wherein the structure may be assembled in at
least 33% less time than a prior art portable support structure.
Assembly in at least 33% less time may also be accomplished in
combination with the at least 50% fewer assemblers, allowing the
portable support structure to be assembled in at least 33% less
time with at least 50% fewer assemblers. A reduction in either the
workforce required to assemble and disassemble a portable support
structure 100 and/or a reduction in the amount of time required to
assemble and disassemble a portable support structure 100
significantly reduces the costs related to a concert event
utilizing the portable support structure 100.
[0060] The portable support structure 100 according to the present
invention also has the advantage that the disassembled structure
takes up a significantly reduced volume as compared with known
portable support structures. The portable support structure 100
according to the present invention may be stored and/or transported
in at least 25% less space than a prior art portable support
structure. This reduction in storage volume permits reduced storage
and transportation costs.
[0061] While the invention has been described with reference to a
preferred embodiment, it will be understood by those skilled in the
art that various changes may be made and equivalents may be
substituted for elements thereof without departing from the scope
of the invention. In addition, many modifications may be made to
adapt a particular situation or material to the teachings of the
invention without departing from the essential scope thereof.
Therefore, it is intended that the invention not be limited to the
particular embodiment disclosed as the best mode contemplated for
carrying out this invention, but that the invention will include
all embodiments falling within the scope of the appended
claims.
* * * * *