U.S. patent number 3,710,505 [Application Number 05/103,568] was granted by the patent office on 1973-01-16 for aerodynamic toy.
This patent grant is currently assigned to Brooklyn Products, Inc.. Invention is credited to Carl J. Linenfelser.
United States Patent |
3,710,505 |
Linenfelser |
January 16, 1973 |
AERODYNAMIC TOY
Abstract
An aerodynamic toy of a generally flat circular configuration
adapted to glide through the air when thrown with a rotational
movement imparted thereto, the configuration producing an
aerodynamic lift, and the material of the toy consisting of a
flexible, resilient polyurethane foam wherein the foam density in
the central regions is slightly greater than at the peripheral
region, and a recess is formed on the underside. The configuration
of the body in conjunction with the recess producing aerodynamic
lift, and the body material permitting the toy to be used
indoors.
Inventors: |
Linenfelser; Carl J. (Brooklyn,
MI) |
Assignee: |
Brooklyn Products, Inc.
(Jackson, MI)
|
Family
ID: |
22295878 |
Appl.
No.: |
05/103,568 |
Filed: |
January 4, 1971 |
Current U.S.
Class: |
446/46; 473/588;
273/DIG.8 |
Current CPC
Class: |
A63H
33/18 (20130101); Y10S 273/08 (20130101) |
Current International
Class: |
A63H
33/00 (20060101); A63H 33/18 (20060101); A63h
027/00 () |
Field of
Search: |
;46/74D ;273/16B |
References Cited
[Referenced By]
U.S. Patent Documents
Other References
American Calmac Corp., Mar. 10, 1966.
|
Primary Examiner: Mancene; Louis G.
Assistant Examiner: Lever; J. Q
Claims
I claims
1. An aerodynamic toy comprising, in combination, a body formed of
a soft, flexible, homogeneous, thermoplastic, resilient, foam
material having a circular peripheral edge, a central region having
a higher density than the density at said edge, a substantially
flat upper surface and a lower surface, said peripheral edge
comprising a convex surface formed of said foam material defining
an aerodynamic lift surface, said lower surface being recessed
throughout said central region defining a rim of foam material
adjacent said peripheral edge having a body thickness between said
upper and lower surfaces greater than at said central region and a
foam material density less than at said central region, the density
of said foam material within said central region between the recess
defined in said lower surface and said upper surface being greater
than the density of said foam material within said rim, and an
annular heat formed high density bead defined on said peripheral
edge of said foam material, said bead maintaining the foam material
adjacent said peripheral edge under compression to define said
convex surface.
2. In an aerodynamic toy as in claim 1 wherein said bead is defined
on said peripheral edge substantially equidistant from said body
upper and lower surfaces and at the location on said body defining
the greatest diametrical dimension.
Description
BACKGROUND OF THE INVENTION
The invention pertains to an aerodynamic toy of the "flying saucer"
type adapted to be thrown with a rotational movement imparted
thereto. The toy is of a configuration inducing aerodynamic lift,
and the direction and characteristics of flight may be
predetermined by the manner thrown.
Aerodynamic toys of the "flying saucer" type have enjoyed wide
popularity, and in particular, the toy constructed in accord with
U.S. Pat. No. 3,359,678 has been widely distributed and used. Such
an aerodynamic toy, when thrown, is capable of achieving
aerodynamic lift, and the flight characteristics may be
predetermined, within limits, by the manner thrown and the angle
imparted to the toy as it leaves the thrower's hand.
Previously constructed aerodynamic toys of the aforementioned type
have been formed of semirigid material, such as high density
plastics, and are usually molded to the desired configuration.
While aerodynamic toys constructed of such material have sufficient
weight to produce extended flight, the "stiff" and firm material of
which the saucer is formed requires that the toy be used outdoors
where it will not engage windows, or other members which could be
damaged by the rapidly moving toy. Also, in view of the weight of
aerodynamic toys of the above type as formed of high density
plastic material, a relatively high speed movement of the toy
through the air is required to achieve significant aerodynamic
lift, and thus the distance that the toy is thrown during normal
use, and the force required to project the toy, is such that
outdoor use only is practical.
SUMMARY OF THE INVENTION
It is an object of the invention to provide an aerodynamic toy of
the "flying sucer" type which may be readily used indoors without
damage to objects accidentally engaged thereby, and which may be
used by small children in complete safety.
Furthermore, it is an object of the invention to provide an
aerodynamic toy of the aforedescribed type which is of a light
weight such that aerodynamic lift can be achieved at relatively
slow velocities of movement, and yet the weight and configuration
is sufficient to permit easy handling and throwing, and the toy
will maintain its shape and physical characteristics even though
abused and roughly handled.
In the practice of the invention the aerodynamic toy consists of a
circular body formed of a soft, resilient, flexible polyurethane
foam material. The toy includes an upper surface which is
substantially flat and the peripheral edge is of a convex
configuration whereby movement of air over the upper surface of the
toy is encouraged. The undersurface is recessed in the central
region of the body and the portion of the body between the recessed
surface and the upper surface is formed of polyurethane foam of a
slightly higher density than that present adjacent the convex
edges. The convex configuration of the toy periphery is maintained
by placing the edges under compression and drawing the edges of the
toy toward a centrally located heat seam bead which assures
maintaining the convex configuration and also strengthens the edge
against ripping or other damage to the toy.
The fact that the entire body of the aerodynamic toy in accord with
the invention is formed of a soft flexible polyurethane foam
prevents the toy from damaging furniture, windows, lamps and other
articles which may be inadvertently struck during use, and the toy
is completely safe as a child struck thereby will not be
harmed.
The light weight of the toy permits even a small aerodynamic lift
effect to aid the gliding movement, and the relative roughness of
the surface due to the construction of the flexible polyurethane
foam aids the aerodynamic effect, as well as provides a pleasing
handgrip surface.
BRIEF DESCRIPTION OF THE DRAWINGS
The aforementioned objects and advantages of the invention will be
appreciated from the following description and accompanying
drawings wherein:
FIG. 1 is an elevational side view of an aerodynamic toy
constructed in accord with the invention,
FIG. 2 is a top plan view of reduced scale,
FIG. 3 is a reduced scale bottom view of the toy,
FIG. 4 is an elevational, diametrical, sectional view as taken
along Section IV--IV of FIG. 2,
FIG. 5 is an elevational, side view of a blank of polyurethane foam
prior to being formed in accord with the invention,
FIG. 6 is an elevational, diametric view of a forming press used in
the construction of the aerodynamic toy prior to closing of the
form halves, and,
FIG. 7 is a side, elevational, diametrical view of the press of
FIG. 6 illustrating the press in the closed position at the forming
stage of the toy.
BRIEF DESCRIPTION OF THE PREFERRED EMBODIMENT
It will be appreciated in FIGS. 1 through 4 that the aeronautical
toy constructed in accord with the invention comprises a body 10
which is of a circular configuration as viewed from the top and
bottom, and is of a planar configuration as viewed from the side.
The body upper surface 12 is substantially flat, and the under
surface 14 is provided with a central recessed portion 16, of a
circular configuration defining a rim portion 18, FIG. 4, having a
lowermost edge 20, and the recess 16 includes the planar dished
surface 22.
The periphery of the toy is circular and convex, as noted in FIGS.
1 and 4. Substantially centrally located between the surface 12 and
the lowermost rim edge 20 is an annular bead 24 which results from
the heating of portions of the polyurethane blank edges to maintain
the edges under compression and impart the convex configuration
thereto.
The aeronautical toy in accord with the invention is preferably
formed from a flat stock material blank 26 which may be either
circular or square in configuration, and is of a planar form having
a thickness substantially equal to the desired distance between
upper surface 12 and the rim edge 20 and includes squared edges 28.
The side view of such a blank is shown in FIG. 5, and the blank is
formed of a soft, flexible, resilient polyurethane foam of such a
pliable characteristic as to permit folding back on itself and
wadding up and compression within the user's fist without damage.
Upon release of deforming pressures on the foam, it returns to its
initial configuration. Such a foam is of a thermoplastic nature
capable of being heat sealed, and capable of maintaining a
predetermined configuration once heated and formed.
The toy is formed by a die press structure of the type shown in
FIGS. 6 and 7. This press structure includes an upper portion 30
having a flat lower surface 32 surrounded by an annular, thin ring
34 terminating in a lower edge 36. The lower portion 38 of the
press includes a surface 40 upon which the annual ring 42 is
mounted in opposed relationship to the ring 34, and terminates in
an upper edge 44 in opposed alignment with the ring edge 36. The
lower die press portion also includes a raised portion 46 forming
an annular conical surface 48, and a flat surface 50 centrally
located within the annular ring 42. The lower portion 38 is heated
to a temperature sufficient to heat seal and impart a permanent set
and deformation to the polyurethane foam material employed.
The blank 26 is placed between the die press halves 30 and 38 as
shown in dotted lines in FIG. 6 whereby the outer edges 28 of the
blank extend radially beyond the aligned rings 34 and 42. The press
halves are then closed to the position shown in FIG. 7
substantially engaging the ring edges 36 and 44. Such closing of
the press portions simultaneously produces two operations on the
foam blank 26.
One of the effects of the closing of the press portions 30 and 38
is to compress the blank 26 in its central region due to the
reduced distance between the surfaces 32 and 50 compared with the
distance between the surfaces 32 and 40. The heated condition of
the portion 38 will heat the polyurethane foam adjacent the
surfaces 48 and 50 forming a "skin" of high density foam material
at these surfaces resulting in a smoother surface than exists at
the other locations on the body 10. Thus, the foam material between
the surfaces 32 and 50 is compressed to a higher density than that
in the rim portion 18, and will remain of a slightly higher density
due to the permanent deformation of the foam producing the recess
16 and the fact that the higher density, smooth surface 22 will
prevent the return of the material to its original form.
Secondly, the closing of the press portions causes the ring edges
36 and 44 to substantially engage, separated only by compressed
foam, and as the temperature of the ring 42 is sufficient to
produce heat sealing, the substantial engagement of the edges 36
and 44 results in the heat sealed seam or bead 24. As will be
appreciated from FIG. 7, the closing of the press portions tends to
compress the material of the blank 26 adjacent the rings 34 and 42
to form the convex surfaces 52 which define the body periphery,
FIG. 7. Once the ring edges 36 and 44 substantially engage to form
the heat sealed bead 24, this compression of the foam material is
permanently maintained such that when the press portions are opened
the periphery of the toy will maintain the convex configuration
desired. Upon opening of the press portions the excess material 54
falls to the lower portion surface 40 as the formation of the heat
sealed seam will automatically produce a trimming of the excess
material. If desired, the ring edges 36 and 44 may be slightly
beveled to facilitate the heat sealing and the combined trimming
operation.
As the axial length of the rings 34 and 52 are approximately the
same the bead 24 occurs substantially equidistant between surfaces
12 and 20 and the bead will be located at the maximum diameter of
the body and is therefore most effectively located.
The aforedescribed construction of the aerodynamic toy results in
several unique advantages. For instance, the forming of the body of
the toy of a soft, resilient, flexible polyurethane foam material
permits the toy to be used indoors, and even if thrown hard, the
toy will not damage furniture, windows, lamps, etc., or harm
children struck thereby. Also, the higher density of the central
region of the toy as defined between the recess 16 and the surface
12 lends a stability and rigidity which maintains the toy in its
normal flat configuration, yet the slightly softer rim portion 18,
due to the lower density in this area, contributes to the
nondamaging characteristics.
The convex configuration of the toy periphery as defined by the
surface 52 produces an aerodynamic flow over the top of the toy,
which in conjunction with drag and "spoil" of the recess 16,
imparts a lift to the toy as it moves through the air, and the
light weight makes the toy sensitive to even small aerodynamic
forces.
The presence of the bead 24 about the periphery of the toy, and at
the outermost regions of the periphery, lends a strengthening and
toughness to the periphery which effectively resists tearing and
damage at this particularly high wear area, and thus the heat
sealed seam forms a protective function, as well as maintaining the
compression within the foam material necessary to achieve the
convex configuration at the periphery.
It is appreciated that modifications to the invention may be
apparent to those skilled in the art without departing from the
spirit and scope thereof.
* * * * *