U.S. patent number 3,691,964 [Application Number 05/081,803] was granted by the patent office on 1972-09-19 for pallet.
This patent grant is currently assigned to Crown Zellerbach Corporation. Invention is credited to Louis P. Larson, Edward F. Repking, Gary L. Wagner.
United States Patent |
3,691,964 |
Larson , et al. |
September 19, 1972 |
PALLET
Abstract
A pallet with single or double decks detachably fastened to
pallet feet. The feet are anchored to an upper deck by twisting
them into place. The upper deck is apertured on its under side to
present tabs for anchoring the feet. The feet are hollow conical
frustum bodies and may be stiffened by internally carried
cores.
Inventors: |
Larson; Louis P. (Glendale,
MO), Repking; Edward F. (St. Louis, MO), Wagner; Gary
L. (Covington, LA) |
Assignee: |
Crown Zellerbach Corporation
(San Francisco, CA)
|
Family
ID: |
22166506 |
Appl.
No.: |
05/081,803 |
Filed: |
October 19, 1970 |
Current U.S.
Class: |
108/56.3;
108/57.1; 108/902 |
Current CPC
Class: |
G06K
13/103 (20130101); B65D 19/0012 (20130101); B65D
19/0028 (20130101); B65D 2519/00318 (20130101); B65D
2519/00079 (20130101); B65D 2519/00567 (20130101); B65D
2519/00278 (20130101); B65D 2519/00104 (20130101); B65D
2519/00985 (20130101); B65D 2519/00273 (20130101); B65D
2519/00019 (20130101); B65D 2519/00562 (20130101); B65D
2519/00069 (20130101); B65D 2519/00089 (20130101); Y10S
108/902 (20130101); B65D 2519/00054 (20130101); B65D
2519/00114 (20130101); B65D 2519/00373 (20130101); B65D
2519/00293 (20130101); B65D 2519/00343 (20130101); B65D
2519/00432 (20130101); B65D 2519/00572 (20130101); B65D
2519/00557 (20130101) |
Current International
Class: |
G06K
13/103 (20060101); B65D 19/00 (20060101); G06K
13/02 (20060101); B65d 019/18 () |
Field of
Search: |
;248/188 ;85/1L
;151/41-42 ;108/156-159,51-58 |
References Cited
[Referenced By]
U.S. Patent Documents
Foreign Patent Documents
Primary Examiner: Gay; Bobby R.
Assistant Examiner: Finch; Glenn O.
Claims
It is claimed and desired to secure by Letters Patent:
1. A pallet comprising a platform including at least two sheet
layers lying against each other with one forming the underside of
the platform, an aperture in said one layer defining tabs
circumferentially distributed about a point on the pallet platform,
and a detachable foot for the pallet including peripheral flange
portions at one end thereof insertable under said tabs to hold the
foot in place, said foot comprising a hollow conical frustum body
and said peripheral flange portions being carried radially
outwardly on the larger diameter end of said body, said body being
open at its larger diameter end thus to accommodate nesting of
multiple bodies, one within the other.
2. The pallet of claim 1, which further comprises another platform
disposed against the smaller diameter end of said body in said
foot, said foot includes an indent at its said smaller diameter
end, and detent means on said other platform fits within said
indent to secure said other platform to said foot.
3. The pallet of claim 1, wherein said foot further comprises a
stiffener core mounted within said body which bears against the
other layer in said platform, and the smaller diameter end of said
body has a wall closing it off to retain the core within said
body.
4. A pallet comprising a platform providing a work-supporting
surface in the pallet and having an underside, and
feet adapted to be anchored to said plateform serving to elevate
the platform during use of the pallet,
a foot in said pallet including a body having an axis which is
normal to the platform with the foot in operative position, and
thread means extending about said axis of said body, said thread
means comprising multiple thread segments equally circumferentially
distributed about the axis of the foot having lead ends terminating
in a substantially common plane normal to said axis,
said platform including thread complementing means exposed on the
underside thereof engageable with the thread means of the foot for
the purpose of detachably securing the foot to the platform, said
thread complementing means of the pallet platform comprising
radially projecting tabs equally circumferentially distributed
about a point on the underside of the platform engageable with the
thread segments of a foot, said platform including portions
overlying said tabs cooperating with said tabs in engaging sides of
said segments.
5. The pallet of claim 1, wherein a foot includes stop portions
interspersed with said thread segments limiting turning movement of
the foot.
6. The pallet of claim 1, wherein the thread means in a foot
comprises thread segments carried externally thereon and the
complementing thread means of the pallet platform comprises tabs
projecting radially inwardly and providing an internally engaging
construction for said thread means of a foot.
7. The pallet of claim 1, wherein the underside of the platform is
formed by a sheet apertured to present said tabs.
8. The pallet of claim 1, wherein the platform comprises at least
two sheet layers lying against each other, one forming the
underside of the platform and such one layer being apertured to
present said tabs, the other layer forming an abutment surface
which the foot bears against.
9. A pallet comprising a platform including at least two sheet
layers lying against each other with one forming the underside of
the platform, an aperture in said one layer defining tabs
circumferentially distributed about a point on the pallet platform,
a detachable foot for the pallet including peripheral flange
portions at one end thereof insertable under said tabs to hold the
foot in place, said foot comprising a hollow body and said flange
portions extending radially outwardly of said body at said one end
of the foot, said body being opened at said one end of the foot and
the opposite end of said body forming the opposite end of the foot
having a wall closing off said body, the foot further comprising a
stiffener core mounted within said body which bears against the
other layer in said platform and which is retained by said wall in
said body, said wall having an indent and said core being recessed
to receive the indent of said wall, and another platform disposed
against said opposite end of said foot, said other platform having
a detent which fits within said indent.
Description
This invention relates to a pallet, and more particularly, to a
pallet having detachable feet supporting a deck or platform therein
in an elevated position.
A general object of the invention is to provide a new and useful
pallet with detachable feet. With the construction contemplated,
the feet are readily attached to a platform or deck in the pallet
to provide a serviceable unit.
Another object of the invention is to provide a pallet which may be
constructed primarily of fiberboard and the like, rendering the
pallet producible at relatively low cost. The pallet contemplated
can withstand normal wear and tear over a substantial period of
time.
Another and more specific object of the invention is to provide a
pallet with detachable feet, where a foot is secured in place
projecting from the underside of a platform in the pallet through
means which becomes interengaged through applying a twisting action
to the foot. This eliminates the need for gluing, taping,
stitching, or using other auxiliary fastening means in securing a
foot in place.
Pallets may be constructed according to the invention which require
little space during storage. Thus, the feet in the pallet may be
stored separately from the platform with multiple feet fitting one
within another to form a nested stack. The platforms, which are
substantially flat with the feet removed, may be stacked one
against the other in a pile.
Not only may the feet be readily secured to a platform, but they
also may easily be removed at some later date if it should be
desired to break down the pallet, or in the event replacement of a
foot is necessary.
A further feature and object of the invention is the provision of a
pallet which may be produced either as a single or a double deck
unit, the particular type of construction which is selected
depending upon the conditions under which the pallet is used.
These and other objects and advantages of the invention, will
become more fully apparent as the following description, read in
conjunction with the accompanying drawings, wherein:
FIG. 1 is a side elevation of a double-deck pallet constructed
according to an embodiment of the invention;
FIG. 2 is a view of the bottom of the pallet shown in FIG. 1, with
portions of the bottom deck in the pallet broken away and a foot
removed to illustrate details of construction;
FIG. 3 illustrates, on a somewhat larger scale, one of the feet in
the pallet, with portions of such foot broken away;
FIG. 4 is a view looking at the base of the foot illustrated in
FIG. 3; and
FIG. 5 is a cross-sectional view, on an even larger scale, further
illustrating how a foot is secured in place.
Referring initially to FIGS. 1 and 2, the pallet illustrated is a
double deck, four-way entry pallet including a top deck or platform
10 upon which the load to be supported is deposited, multiple feet
12 anchored to the top deck and serving to support the top deck in
an elevated position, and a lower deck or platform 14 secured to
the bottom of feet 12. The pallet is referred to as a "four-way"
entry pallet, since the distribution of the feet, as shown in FIG.
2, permits the usual tines or forks of a lift truck to be inserted
under the upper deck with such moved inwardly from either of four
sides of the pallet.
As indicated earlier, the pallet may be constructed primarily of
material such as fiberboard with such a construction resulting in a
relatively light weight, and economies in the production of the
pallet. A construction such as might be utilized is perhaps best
illustrated in FIG. 5, where portions of the upper deck or platform
are shown in cross section. Referring to this FIG. the construction
illustrated comprises a panel made up of a solid fiberboard sheet
16, and bonded to the underside of the sheet one sheet of
doublewall corrugated fiberboard shown at 20. These various sheets
normally are imperforate, and collectively constitute what is
referred to herein as an upper layer in the platform or deck.
Suitably bonded to the lower face of sheet 20 is another solid
fiberboard sheet 22. This sheet, which forms the underside of the
platform, is apertured in a manner to be described, for the purpose
of enabling the anchoring of feet to the platform. Sheet 22 is also
referred to herein as a lower layer in the platform.
Considering now in more detail the construction of a foot, and
referring to FIGS. 3 and 4, each comprises a hollow, conical
frustum body 24 having an open top, as perhaps best illustrated by
the edge 26 in FIG. 3 which defines such opening. The body is
closed off at its bottom or base by a wall 28. Such body is
preferably made of a light weight, stiff material, such as a
polyethylene or polystyrene plastic. Such material is scuff and
wear resistant, and has a limited degree of flexibility.
Integrally joined to the larger diameter or upper end of body 24,
and equally circumferentially distributed about the body's axis are
multiple, arcuate, peripheral thread segments 30. These are carried
radially outwardly on the body. In the particular embodiment of the
invention herein described, as shown with reference to foot 12a in
FIG. 2 which is shown in its entirety by reason of breaking away
portions of the underside of deck 10 in FIG. 2, three of such are
provided. Each resembles the thread segment shown in its entirety
and in a larger scale in FIG. 4. Each thread segment takes the form
of an arcuate flange or flange portion, the major portion 30a of
which lies in a plane disposed normal to the axis of the body. This
plane is common for all the thread segments. Each thread segment
terminates in an inclined, partially freed lead end portion,
represented by portion 30b shown in FIGS. 3 and 4. Each inclined
portion inclines axially outwardly of the larger diameter end of
the body 24, and the lead ends of the three flange portions
terminate in a common plane extending normal to the axis of body
24.
Formed along the side of body 24 are channel regions 36, with one
being located between the trailing end 30c of a thread segment and
the lead end 30b of a circumferentially adjacent thread segment.
Each channel region terminates adjacent the larger diameter end of
the hollow body in a skirt such as that shown at 38, which
parallels major portions 30a of the segments but is spaced a slight
distance axially inwardly on the body 24 from the larger diameter
end of the body. Each skirt at one end joins with the trailing end
of a thread segment which is immediately adjacent one end, through
a shoulder 40 (see FIG. 3). The opposite end 41 of a skirt is
unjoined.
Continuing with a description of a foot, wall 28 at the smaller
diameter or lower end of body 24 is formed with a substantially
cylindrically shaped recessed region or indent 42. As seen in FIG.
3, extending about the interior of the indent is an annular ridge
44.
A foot may be stiffened by including within the interior of its
body 24 a core, such as the one shown at 46 in FIG. 3 in dashed
outline. The core may take the form of a winding of corrugated
board, the winding having a hollow center 48 whereby it may sit as
shown in FIG. 3 with its lower end seated over the protrusion
within the body formed by indent 42. The core when seated within
the hollow body has a top face lying substantially in the plane of
the tops of portions 30a of the thread segments and edge 26.
Considering again the panel forming the upper platform or deck in
the pallet, and referring to FIG. 2, the lower layer in the panel,
i.e., fiberboard sheet 22, is apertured in the region where a foot
is to be anchored, by a cutout 50. As shown in FIG. 2, such
includes arcuate sweeps 50a curving on a common radius about point
51, and notched regions 50b. By the provision of such a cutout,
between adjacent notched regions circumferentially spaced tabs 52
are formed. In the region of these tabs sheet 22 on the underside
of the panel is left unjoined to the layer formed of sheets 16, 18
and 20.
A foot is detachably anchored to the panel forming the upper deck
in the pallet by placing the larger diameter end of the body in the
foot over cutout 50, with inclined lead end portions 30b disposed
over notched regions 50b. The foot portion is also properly
centered, by placing the axis of its body 24 over point 51 at the
center of the cutout. Prior to placement of the foot, the
stiffener, if it is to be used, may be properly seated within the
interior of body 24. If the foot is then turned by twisting the
body about its longitudinal axis, the thread segments are caused to
be advanced under the tabs 52. The lead end portions, by inclining
outwardly beyond the plane of portions 30a facilitate initial
movement of the thread segments under the tabs. Such movement is
continued until skirts 38, which have substantially the outline of
notched regions 50b, move into registry with these notched regions.
On this occurring, shoulders 40 move up against edges 52a of the
tabs, to limit further movement. Such shoulders, therefore,
function as stop portions in the construction. At this time, edges
52b of the tabs are in approximately the plane of skirt ends 41
whereby they function to inhibit turning in the opposite
direction.
With a foot detachably anchored as described, the top face of a
core 46 snugly engages the under surface of inner sheet 20. In this
way, when the stiffener core is used it provides additional support
for a load.
In constructing a single deck pallet, i.e., one that includes only
the top deck or platform 10, once the various feet have been
anchored to the panel forming the platform the pallet is complete.
To prepare a double-deck pallet including lower deck or platform
14, another panel is secured to the bottom of the various feet,
using fastener devices of the type illustrated in FIG. 3.
Referring to FIG. 3, lower deck 14 may take the form of a panel
constructed of the same type of material as the panel making up
upper deck 10. The panel is provided with a circular cutout 56 in
the region of the panel which is to underlie indent 42 of a foot.
Shown at 58 is a fastener plug, which may be made of the same
material as body 24. The plug comprises a post portion 60 which is
substantially cylindrical but slightly tapered, and a terminating
flange 62 extending circumferentially about the base of the post
portion. Such plug is inserted within the circular aperture, with
the post extending therethrough and flange 62 coming up against the
bottom face of the panel. The plug is insertable into indent 42,
with the posting functioning as a detent when so inserted. To
produce a faster grip, an annular groove, such as that shown at 64,
may be provided about the post, which register with inner flange or
ridge 44 about the interior of indent 42 with the parts in their
finally seated position.
From the above, it should be apparent that a very unique pallet has
been described, having a number of features and advantages. The
same is really assembled from panels and separated feet, through a
mechanical anchoring system wherein relative twisting produces
interengagement of the parts. The pallet is versatile, being
constructible either as a single or double-deck unit. The
detachable feet provided are extremely durable, and well enabled to
take heavy loading. The pallet is susceptible of being manufactured
from low cost materials, such as the fiberboard material described.
The pallet is light, is easily decorated or painted, and can be
made moisture resistant by treatment. Once assembled, it can be as
easily disassembled with reverse twisting of the various feet.
Because the feet are formed of hollow, conical frustum bodies,
which are open at the top ends, and because the thread segments or
flanges are carried radially outwardly of the larger diameter ends
of the bodies, the interior of the bodies are left unencumbered and
multiple bodies may be readily stacked one within another in a
nested relationship. This is also a contributing factor in space
saving during storage periods.
While a particular embodiment of the invention has been described,
it is appreciated that changes and variations are possible. It is
desired to cover all such modifications of the invention as would
be apparent to one skilled in the art.
* * * * *