U.S. patent number 3,729,165 [Application Number 05/153,770] was granted by the patent office on 1973-04-24 for form for manholes and the like.
This patent grant is currently assigned to James D. Cypert. Invention is credited to Carroll O. Trimble.
United States Patent |
3,729,165 |
Trimble |
April 24, 1973 |
FORM FOR MANHOLES AND THE LIKE
Abstract
A steel sectional form including inner and outer shells, each
formed of components which can be readily assembled for reception
of a concrete pour and subsequently disassembled for reuse. The
inner shell, which is to be removed through the formed manhole,
incorporates key panels for facilitating its disassembly and step
gates for enabling the mounting of internal steps as desired
subsequent to an initial setting of the concrete. The present
invention generally relates to equipment for the forming of
concrete structures and, while adaptable for use in the formation
of sewage pump stations, storm cellars, and the like, is primarily
intended for use in the forming of manholes. It is an intention of
the instant invention to provide a form which allows for a rapid in
situ forming of a homogeneous poured concrete manhole direct at and
about the communicating sewer lines. In conjunction therewith, a
sectional form is utilized which is both readily assembled and
disassembled directly at the site and which utilizes components so
constructed whereby variations in the size of the structure being
formed can be conveniently effected. The assembly and disassembly
of the form, and in particular the inner shell which must be
internally dismantled and removed through the formed manhole, is
facilitated by the utilization of key panels which have the opposed
vertical edges thereof so defined as to greatly simplify the
insertion and removal thereof. In addition, all of the individual
components are reinforced completely about the peripheries thereof
and adapted for edge bolted or clamped connection to the adjoining
components in providing a structurally stable form for the
reception of the poured concrete. The instant invention also
provides for the mounting of internal steps within the completed
manhole through a unique arrangement of gate closed openings which
enable a positioning of the steps subsequent to an initial setting
of the concrete.
Inventors: |
Trimble; Carroll O.
(Springdale, AR) |
Assignee: |
James D. Cypert (Springdale,
AR)
|
Family
ID: |
22548674 |
Appl.
No.: |
05/153,770 |
Filed: |
June 16, 1971 |
Current U.S.
Class: |
249/144; 249/184;
249/1; 425/DIG.126 |
Current CPC
Class: |
B28B
7/168 (20130101); Y10S 425/126 (20130101) |
Current International
Class: |
B28B
7/16 (20060101); B22c 009/24 () |
Field of
Search: |
;249/144,142,160,163,165,168,169,119,122,125,126,11,12,173,1,184
;25/124,13A,DIG.26 |
References Cited
[Referenced By]
U.S. Patent Documents
Primary Examiner: Overholser; J. Spencer
Assistant Examiner: Jones; DeWalden W.
Claims
What is claimed as new is as follows:
1. A form for manholes or the like comprising, when assembled, an
inner shell and an outer shell, said inner shell extending to the
full height of the structure being formed and including a plurality
of vertically stacked sections, each inner shell section comprising
a plurality of individual rigid panels edge interlocked to define a
generally cylindrical configuration, said panels being selectively
releasable from the adjoining panels for removal, said outer shell
including a plurality of vertically stacked sections corresponding
in number and height to the inner sections, each outer section
being formed into a generally cylindrical configuration, the
generally cylindrical configuration of each outer shell section
being of a greater internal diameter than the corresponding inner
shell section and being positioned thereabout in circumferential
outwardly spaced relation thereto to define an internal forming
area, each inner shell panel including reinforcing members welded
thereto completely about the periphery thereof and defining
inwardly projecting securing flanges completely about each panel,
each outer shell section being formed of a single continuous member
peripherally reinforced completely thereabout by reinforcing which
defines outwardly projecting peripheral mounting flanges including
a pair of vertical end flanges boltable together to form the outer
shell section into a cylindrical configuration surrounding the
inner shell, both the inner shell and the outer shell including a
base section, a middle section and an upper cone section releasably
interlocked to each other, the panels of each inner shell section
including a key panel for facilitating both a positioning and
removal of the panels of the section, said key panel including
opposed vertical edges with the edge reinforcing thereon projecting
parallel to both each other and a center line which bisects the key
panel and the circular configuration defined by the section, the
adjacent edge reinforcing on the two panels which adjoin the key
panel of the section being similarly orientated so as to abut along
the key panel vertical edge reinforcing along the full length
thereof whereby a direct inward withdrawal of the key panel can be
effected as an initial step in the disassembly of the inner shell
section, the vertical edge reinforcing on the remaining panels of
each section, as well as the opposed vertical edges of the two
adjoining panels, being radially directed relative to the circular
configuration defined by the section.
2. A form for manholes or the like comprising, when assembled, an
inner shell and an outer shell, said inner shell extending to the
full height of the structure being formed and including a plurality
of vertically stacked sections, each inner shell section comprising
a plurality of individual rigid panels edge interlocked to define a
generally cylindrical configuration, said panels being selectively
releasable from the adjoining panels for removal, said outer shell
including a plurality of vertically stacked sections corresponding
in number and height to the inner sections, each outer section
being formed into a generally cylindrical configuration, the
generally cylindrical configuration of each outer shell section
being of a greater internal diameter than the corresponding inner
shell section and being positioned thereabout in circumferential
outwardly spaced relation thereto to define an internal forming
area, each inner shell panel including reinforcing members welded
thereto completely about the periphery thereof and defining
inwardly projecting securing flanges completely about each panel,
each outer shell section being formed of a single continuous member
peripherally reinforced completely thereabout by reinforcing which
defines outwardly projecting peripheral mounting flanges including
a pair of vertical end flanges boltable together to form the outer
shell section into a cylindrical configuration surrounding the
inner shell, the panels of each inner shell section including a key
panel for facilitating both a positioning and removal of the panels
of the section, said key panel including opposed vertical edges
with the edge reinforcing thereon projecting parallel to both each
other and a center line which bisects the key panel and the
circular configuration defined by the section, the adjacent edge
reinforcing on the two panels which adjoin the key panel of the
section being similarly orientated so as to abut along the key
panel vertical edge reinforcing along the full length thereof
whereby a direct inward withdrawal of the key panel can be effected
as an initial step in the disassembly of the inner shell section,
the vertical edge reinforcing on the remaining panels of each
section, as well as the opposed vertical edges of the two adjoining
panels, being radially directed relative to the circular
configuration defined by the section.
3. A form for manholes and the like comprising, when assembled, an
inner shell and a surrounding outwardly spaced outer shell, said
inner shell including a plurality of vertically stacked sections,
each inner shell section comprising a plurality of individual
panels edge interlocked to define a generally cylindrical
configuration, said panels being selectively disassemblable for
removal, said panels including opposed vertical ends with
flange-like edge reinforcing along the full length thereof, the
panels of each section including a key panel, said key panel
including opposed vertical edges with the edge reinforcing thereon
projecting parallel to both each other and a center line which
bisects the key panel and the circular configuration defined by the
section, the adjacent edge reinforcing on the two panels which
adjoin the key panel of the section being similarly oriented so as
to abut along the key panel vertical edge reinforcing along the
full length thereof whereby a direct inward withdrawal of the key
panel can be effected as an initial step in the disassembly of the
inner shell section, the vertical edge reinforcing on the remaining
panels of each section, as well as the opposed vertical edges of
the two adjoining panels, being radially directed relative to the
circular configuration defined by the section.
Description
These together with other objects and advantages which will become
subsequently apparent residue in the details of construction and
operation as more fully hereinafter described and claimed,
reference being had to the accompanying drawings forming a part
hereof, wherein like numerals refer to like parts throughout, and
in which:
FIG. 1 is a perspective view of the outer shell;
FIG. 2 is a perspective view of the inner shell;
FIG. 3 is an enlarged vertical cross-sectional view through the
assembled and positioned form;
FIG. 4 is a cross-sectional view taken substantially on a plane
passing along lines 4--4 in FIG. 3;
FIG. 5 is a cross-sectional view taken substantially on a plane
passing along line 5--5 in FIG. 3;
FIG. 6 is a perspective view of the step gate;
FIG. 7 is a cross-sectional detail illustrating the step gate in
position during a concrete pour;
FIG. 8 is a cross-sectional detail illustrating the gate removed
and a step inserted; and
FIG. 9 is a cross-sectional detail illustrating the manner in which
the key panel assembles and disassembles.
Referring now more specifically to the drawings, reference numeral
10 is used to generally designate the form comprising the instant
invention, with the poured concrete structure formed thereby being
designated by reference numeral 12. The form 10, when assembled,
includes an inner shell 14 and an outer shell 16.
The inner shell 14 is formed in four primary sections, the base
section 18, the middle or filler section 20, the cone section 22,
and the top or extension section 24.
Each of the sections is formed of a plurality of arcuate components
which combine to define a generally cylindrical closure. The
components of the base section 18 are designated by reference
numeral 26. The components of the middle or filler section 20 are
designated by the reference numeral 28; the cone section components
by reference numeral 30, and the extension or top section
components by reference numeral 32. The section components are
similar in that each is peripherally reinforced completely
thereabout. This peripheral reinforcing consists of top and bottom
full length angle members 34 and 36 welded to the base, middle and
top components, each being oriented so as to provide a horizontally
directed flange for seated engagement against similar flanges on
the vertically adjacent components. The cone components 30 include
a welded angle member 36 along the lower edge thereof. However, the
upper edge, rather than being provided with an angle member such as
34, is reinforced by a rectangular bar 38 welded thereto and
likewise providing a flat upper bearing surface. The opposed
vertical edges of each of the components are reinforced, along the
full length thereof, by inwardly projecting flat bars 40 welded
therealong and combining with the upper and lower reinforcing
members to provide the aforementioned reinforcement completely
about the periphery of the individual components. The vertical
reinforcing members 40, as well as all of the horizontal
reinforcing members other than the top member 34 of the extension
section 24 and the bottom member 36 of the base section 26, are
provided with circumferentially spaced bolt holes therethrough for
the reception of clamping bolts in locking the adjacent components
to each other when assembling the form 10. Alternatively,
appropriate clamping members other than bolt and nuts can be used
if so desired.
As will be appreciated from the drawings, all of the components
other than the cone components 30 are of a substantially
rectangular configuration arcuately formed so as to combine with
similar components in providing the desired cylindrical shape. The
cone components 30, due to the truncated configuration to be formed
thereby, are each in the nature of a truncated triangle with the
opposed vertical edges thereof converging upwardly. The upper and
lower dimensions of the cone section 22 and the components 30
thereof is of course determined by the size of the top and filler
sections 24 and 20 with the cone section 22 forming a smooth
transition area therebetween. With regard to the filler section 20,
it will be noted that this section, in the illustrated form 10,
includes two tiers. The number of tiers provided will depend on the
height desired for the finished manhole and can vary as required.
The basic modular construction of the form enables a ready
insertion or removal of one or more complete tiers.
Each of the sections 18, 22 and 24, as well as all of the tiers in
the middle section 20 include, as one of the panels or components,
a key panel designated in the drawings by a priming of the
associated panel reference numeral. For example, the panel in the
cone section is designated by reference numeral 30' with the key
panel in the filler or middle section being indicated by reference
numeral 28'.
Referring to FIGS. 4, 5 and 9 in particular, it will be appreciated
that while the basic panels which comprise the individual section
have the vertical edge flanges 40 thereof radially orientated
relative to the cylindrical form of the shell, the edge flanges 40'
of the associated key panels are orientated parallel to each other
and to a center line which bisects the corresponding key panel. As
previously indicated, one such key panel is associated with each
section or section tier. Further, in order to properly accommodate
the key panel, the adjacent edge flange of each of the two
adjoining panels for each key panel is also orientated parallel to
the aforedescribed center line so as to accommodate the key panel
edge flanges 40' flush thereagainst. This provision of parallel
cooperating edge flanges both directly on the key panel and on the
adjacent edges of the adjoining panels enables a simplified
mounting of the key panel subsequent to a positioning of the
remaining associated panels, and by the same token, allows a proper
internal disassembly of each of the sections through a simple
initial inward sliding of the key panel subsequent to a removal of
the fixing bolts or clamps. FIG. 9 is of interest in illustrating
the key panel outwardly shifted from its installed position.
For ease of assembly, it is contemplated that the key panel 28' of
the cone section 22 follow an arc of approximately 60.degree. with
the cone being completed with three additional panels 28, each
following an arc of approximately 100.degree.. The key panels
associated with the remaining sections are also to follow an arc of
60.degree. with the completion of each section utilizing five
additional panels each also following an arc of 60 degrees to
define the desired cylindrical form.
As noted in FIGS. 2 and 3, the base section 18 is to include,
within appropriate ones of the panels 26, arcuate downwardly
directed recesses 42 which span and accommodate the pipelines 44
over which the manhole is to be constructed. These recesses 42 are
edge reinforced by appropriately formed angle members 46 welded to
the panel 26 thereabout.
The completed manhole is to be provided with a series of vertically
spaced steps 48 to allow access to the interior thereof. In order
to provide for the mounting of the steps 48 without requiring an
elaborate modification of the basic form work for the accommodation
of the steps during the pour and setting of the concrete, at least
one panel in each section or tier, including base section 18 is
provided with a horizontally elongated opening 50 therein which is
temporarily closed by an overlying gate 52 arcuately curved so as
to follow the curvature of the corresponding panel. This gate 52,
incorporating a manipulating inwardly projecting handle 54 thereon,
is slidably retained by upper and lower edge retaining offset edges
or rail portions 56 which can either be directly formed from the
panel as illustrated or provided by welding short angle irons to
the inner face of the panel both above and below the opening 50. It
is contemplated that each gate 52 be slightly longer than the
corresponding opening 50 whereby the opposed ends of the gate 52
will bear on the inner face of the panel to the opposite ends of
the opening 50 and thus cooperate with the rails 56 in retaining
the gate 50 in a manner whereby the opening 50 is sealed during the
pouring operation. Once the pour has sufficiently hardened or
obtained an initial set, the gates 52 are slid laterally to expose
the pour through the opening 50 and the individual steps 48 merely
forced into the slightly yieldable concrete. The concrete, at this
stage, while accommodating the inward forcing of the step or
rung-like member, possessing sufficient rigidity so as to maintain
the step in position during the completion of the setting without
further supports being required.
As will be appreciated, the sections and tiers can be
circumferentially shifted relative to each other so as to, if so
desired, stagger the steps. Any circumferential shifting of the
sections, if bolted connections are used, will of course be limited
by the spacing of the bolt holes. Further, in order to facilitate
an assembly of the panels of the sections, it is contemplated that
the panels for each section be sequentially numbered.
Referring now specifically to the outer shell 16, it will be noted
that this shell 16 is formed of an equal number of sections and
tiers as the inner shell 14 so as to directly cooperate therewith.
For example, the illustrated outer shell includes a base section
58, a two tier middle or filler section 60, a cone section 62 and a
top or extension section 64.
The outer shell 16 is of equal height with the inner shell 14 and
of the same configuration, differing therefrom only in a greater
circumference so as to, when positioned about the inner shell 14,
define an internal space therebetween completely thereabout for
reception of the pour 12.
Each section and tier of the outer shell 16 is preferably of one
piece in a basically cylindrical configuration, the cone section of
course being more in the nature of a truncated conical member as
illustrated. The opposed ends of each section and tier are
reinforced by vertical bars or plates 66 welded along the full
height thereof, these bars 66 having bolt holes therein for the
accommodation of bolts utilized to interlock the two ends of each
section in the assembled cylindrical position of the outer shell
16. In addition, the remainder of the periphery of each section and
tier is reinforced by the welding thereto of full length angle
members 68, each oriented with a horizontally projecting flange for
a bolting or clamp locking thereof to an adjoining tier or section.
Of course the bottom flange of the base section 58 need not
incorporate the bolt holes, nor need such holes be provided in the
top flange of the top or extension section 64. The only exception
to the use of an angle edge reinforcing member is about the top of
the cone section 64 where a rectangular bar 70 is welded to the
section edge as will be best appreciated from FIG. 3. It will of
course be appreciated that all of the edge reinforcing angles and
bars on the outer shell 16 are outwardly directed so as to provide
for a smooth interior for the reception of the pour. By the same
token, the previously described edge reinforcing members on the
inner shell 14 are of course inwardly directed. The sections and
tiers of the outer shell 16 are, as is of the case with the inner
shell, preferably constructed of 16 gauge metal or the like, the
particular strength of the metal used depending upon the particular
size of the structure being formed. The outer sections and tiers,
each being formed of one piece, are to be slightly flexible or
resilient in nature whereby, upon a sufficient setting of the
concrete pour 12 to enable a removal of the form, each section and
tier can be unbolted and the ends thereof separated sufficiently so
as to free the section or tier from the concrete and enable a
vertical removal thereof. The individual panels of the inner shell,
initially disassembled by first removing the associated key panels,
are removed one at a time through the open upper end of the formed
manhole.
In order to maintain the assembled relationship of the inner and
outer shells, spacing blocks can be provided between the lower ends
thereof peripherally thereabout and the upper ends maintained
properly spaced by appropriate spacer bars 72 orientated at
circumferentially spaced points about the upper end of the form 10.
Such spacer bars, noted in FIG. 3, will incorporate a pair of
downwardly directed notches longitudinally spaced from each other
for the accommodation of the upper edges of the inner and outer
shells 14 and 16 at the desired opening.
In assembling the form 10, depending upon the particular size
thereof, the shells can be assembled adjacent the hole and
subsequently lowered into position by overhead lift equipment
engaged with the shells or lift eyes thereon. Alternatively, the
two shells can be assembled directly in the hole. Further, as
previously indicated, any number of middle or filler tiers can be
utilized. Further, the height of each tier, as well as the height
of each section can vary depending upon the particular nature of
the finished structure. The top or extension section is
particularly desirable when it is necessary to adjust the height of
the form to a finished grade line. Thus, by using extension
sections of different heights, a basic form can be accommodated to
similar installations where the only difference is variations in
ground level requiring relatively small height adjustments at the
upper end of the form. Incidentally, it will of course be
appreciated that the base section 58 of the outer shell 16 also
includes edge reinforced downwardly directed pipe accommodating
recesses 74. These recesses can be selectively closed or opened by
pipe gates depending on whether or not the particular recess is to
be used. Further, inserts can be provided to vary the size of the
recesses for the accommodation of pipes of different sizes.
Furthermore, while not mentioned supra, in order to facilitate a
removal of the key panels, as an initial step to disassembling the
inner liner, each key panel is provided with a pair of inwardly
projecting handgrips 76 which, upon an unbolting or unclamping of
the key panel, can be easily grasped for a straight inward pulling
of the key panel.
The foregoing is considered as illustrative only of the principles
of the invention. Further, since numerous modifications and changes
will readily occur to those skilled in the art, it is not desirable
to limit the invention to the exact construction and operation
shown and described, and accordingly all suitable modifications and
equivalents may be resorted to, falling within the scope of the
invention.
* * * * *