U.S. patent number 3,883,914 [Application Number 05/395,282] was granted by the patent office on 1975-05-20 for flotation life jacket.
Invention is credited to Ronald L. Blair.
United States Patent |
3,883,914 |
Blair |
May 20, 1975 |
Flotation life jacket
Abstract
A flotation life jacket formed to comprise a plurality of
vertically extending pockets formed in the jacket with each of the
pockets having a filler material, the filler material comprising
cylindrical members formed of foam, the cylindrical outer surface
of which is skin coated, the skin coating sealing the cylindrical
surface and rendering it impervious to water and reducing the
likelihood of the filler becoming waterlogged, thereby enhancing
the flotation capabilities of the jacket. The shape of the filler
material in the pockets also makes the jacket more readily conform
to the shape of the wearer and eliminates any sharp corners and
increases comfort and manouverability.
Inventors: |
Blair; Ronald L. (Chicago,
IL) |
Family
ID: |
23562402 |
Appl.
No.: |
05/395,282 |
Filed: |
September 7, 1973 |
Current U.S.
Class: |
441/112 |
Current CPC
Class: |
B63C
9/115 (20130101) |
Current International
Class: |
B63C
9/00 (20060101); B63C 9/115 (20060101); B63c
009/10 () |
Field of
Search: |
;9/341,342,340,336,337,338,347 |
References Cited
[Referenced By]
U.S. Patent Documents
Foreign Patent Documents
|
|
|
|
|
|
|
1,057,298 |
|
Feb 1967 |
|
GB |
|
1,212,756 |
|
Nov 1970 |
|
GB |
|
Primary Examiner: Blix; Trygve M.
Assistant Examiner: Frankfort; Charles E.
Attorney, Agent or Firm: Kraus; Max R.
Claims
What is claimed is:
1. A flotation jacket to be worn by a person around the upper part
of the body and having spaced side openings through which the arms
of the person extend, said jacket having a plurality of vertically
extending cylindrical-shaped pockets formed in said jacket and
extending around the front, back and sides of said jacket, a filler
material vertically retained in said pockets, said filler material
being of a cylindrical shape and of a foam material with the
cylindrical outer surface skin coated, said skin coated outer
cylindrical surface rendering the filler material impervious to
water and reducing the likelihood of said filler becoming
water-logged, thereby increasing the flotation capabilities of the
jacket, said cylindrical filler being free to rotate or turn within
each of said pockets to conform to the body of the person and his
movements.
2. A flotation jacket as set forth in claim 1 in which the
cylindrical filler is approximately between two and one-half to
three inches in length and in which certain of said pockets have a
plurality of such fillers.
3. A flotation jacket as set forth in claim 1 in which a plurality
of said cylindrical fillers are confined in a single pocket and
each such filler is separate from the other.
4. A flotation jacket as set forth in claim 3 in which spaces are
provided between adjacent cylindrical fillers in a single
pocket.
5. A flotation jacket as set forth in claim 1 in which the foam
material is a product produced by Dow Chemical Company and
identified under the trademark "Ethafoam No. 220."
6. A flotation jacket as set forth in claim 1 in which the
cylindrical filler comprises an integrally formed member having an
annular groove to provide for a flexible connection at said annular
groove.
Description
BRIEF SUMMARY OF THE INVENTION
One of the objects of this invention is to provide a flotation
jacket, known as a life jacket, in which the jacket is formed with
vertically extending pockets, which pockets are filled with fillers
formed of solid cylindrical-shaped members formed of a foam
material, the cylindrical surface of same being skin coated to
prevent penetration of water through said skin coated surface and
to reduce the possibility of waterlogging of said cylindrical
members so as to provide greater flotation characteristic and
greater safety factor.
Another object of this invention is to provide a filler formed of a
cylindrical surface which is sealed and impervious to water so that
water cannot penetrate through said cylindrical surface thereby
presenting a substantial surface area which is impenetrable by
water and thereby increasing the flotability of said jacket.
Another object of this invention is to provide a flotation jacket
in which the filler material is formed in a cylindrical shape so
that when the jacket is worn it more readily conforms to the shape
of the body of the wearer and eliminates corners or sharp edges of
the filler material from bearing against the body of the
wearer.
There are prior flotation jackets formed with pockets in which the
filler in said pockets is of a foam material generally similar to
what is disclosed herein, however, said former fillers were made in
the shape of ingots and/or rectangular shape in cross-section and
to produce said ingot or rectangular-shaped fillers they were cut
from a board or slab and as a result of said cutting a substantial
portion of the ingot or rectangular-shaped filler lost its skin
coating and by virtue thereof the surface of the filler was
penetrable by water which reduced the flotation quality of said
filler material and of the jacket. Further, the ingot or
rectangular-shaped fillers had edges or sharp corners and when the
jacket was worn the corner edges would interfere with the comfort
and wear-ability of the jacket as it did not readily conform to the
shape of the body of the wearer and it also increased the
possibility of the filler material jabbing against the body of the
wearer as a result of such corner edges. The foregoing objections
are eliminated by the present invention in that the filler material
is of cylindrical shape with the cylindrical surface being skin
coated along its entire surface which improves the life and
serviceability of the jacket and also said cylindrical fillers more
readily conform to the body of the wearer since there are no sharp
corner edges in said filler to bear against the body of the
wearer.
BRIEF DESCRIPTION OF THE DRAWINGS
In the drawings:
FIG. 1 is a view of the flotation life jacket as worn.
FIG. 2 is an enlarged view taken on line 2--2 of FIG. 1.
FIG. 3 is a perspective view of one of the cylindrical fillers.
FIG. 4 is a view taken on line 4--4 of FIG. 1.
FIG. 5 is an exploded view of a plurality of the cylindrical
fillers; and
FIG. 6 is a view of a modified cylindrical filler.
The flotation jacket is of conventional shape and is generally
designated at 10. The body 12 of the jacket is formed of a nylon
material and is shaped to provide a back portion 14 with continuing
side portions 16 and front portions 18 and is provided with a pair
of spaced side openings 20 through which the arms of the wearer are
inserted. The body has shoulder portions 22 connecting the back
portion with the front portion, all of which is conventional and
well-known. The body is provided with spaced vertical lines of
stitching as at 24 which form spaced vertically extending extending
pockets 26 around said body and each of said pockets is adapted to
receive a filler, to be hereinafter described.
It will be noted that the lower or skirt portion 28 of the jacket
body is also provided with vertical lines of stitching which are
continuations of the vertical stitchings 24 and likewise provide
spaced pockets 30 in the skirt portion of the jacket, similar to
the pockets 26. The pockets 30 in the skirt portion 28 are
vertically alined with the pockets 26 and said pockets, except for
those at the back of the skirt portion are also to be filled with
the filler to be described. Spaced transverse or horizontal lines
of stitching 32 extend around said body to separate the body
pockets 26 from the skirt pockets 30. By leaving the back portion
of the skirt without fillers, the skirt portion of the jacket which
would normally lie adjacent the hips of the wearer would be
completely flexible.
The filler material, which is the most important factor of this
invention, is a solid cylinder, indicated at 34, formed of a foam
material which is skin coated along its outer cylindrical surface.
The material which is best adapted for this jacket is a product
produced by Dow Chemical Company under the trademark "Ethafoam No.
220", and under Dow owned U.S. Pat. No. 3,067,147 issued on Dec. 4,
1962. This material is produced by Dow Chemical Company in the form
of a solid cylindrical extrusion and when manufactured is extruded
through heated tubes which seals the outer circumference of the
solid cylinder to provide the skin coating 36. This product in said
shape, insofar as is known to applicant, has not been used by
either Dow Chemical Company or anyone else for a flotation jacket.
To applicant's knowledge said product has been used in connection
with the manufacture of concrete or a similar product totally
unrelated to the present invention. The cylindrical fillers are
produced by Dow in nine feet lengths.
The present invention utilizes said cylindrical foam members in
either of two forms. The filler shown in FIGS. 2, 3, 4 and 5 may be
cut from such nine feet lengths to the desired length, preferably
each of a length of between 21/2 to 3 inches, and a plurality of
such cut fillers are used to occupy the spaces in the pockets 26
and 30. The only portion of the filler where the skin coating is
broken would be at the opposite ends 38 of each cut length, thus,
only a small surface area of the cylindrical member has a broken
skin coating leaving the major area or surface of said cylinder
skin coated. Depending upon the length of the pocket, each pocket
is intended to accommodate one or more lengths of filler material.
For example, the pockets 26 in the front and back portions of the
jacket body would each be filled with a plurality of separate and
disconnected cylindrical members 34, whereas the side pockets 26
and the skirt pockets 30 would each be filled with one of said
fillers. The skin coated surface of the cylindrical member also
makes it easy to insert the cylindrical members into the pockets in
the manufacturing process.
Where the pocket is filled with a plurality of separate and
disconnected cylindrical filler members 34, as best seen in FIG. 2,
each 21/2 to 3 inches in length, free areas or spaces 40 would be
provided between the ends of adjacent filler members so that the
fillers 34 would be free to move vertically in their respective
pockets, to the extent of the free areas or spaces, and the nylon
material at said spaces indicated at 42 would remain extremely
flexible at said junctures along the length or height of the
pockets. The cylindrical shape of the fillers 34 eliminates all
sharp edges or corners against the body of the wearer and permits
the fillers to rotate or turn within their pockets with the body
movement of the wearer thus increasing the comfort and permitting
the wearer to have greater manouverability while wearing the
jacket. The unbroken skin coat 36 increases the serviceability and
life of the jacket as it increases the area of the filler which is
impenetrable by water and is therefore less likely to become
waterlogged.
In lieu of the individual disconnected cylindrical filler members
34 just described, the cylindrical filler member 44 can be of a
continuous length sufficient to accommodate the length of each
pocket in which it is to be inserted. Said cylindrical member 44
may be formed with one or more annular grooved portions 46 cut
therein, as indicated in the modification in FIG. 6, in which two
or more of such elongated cylindrical members 44 are connected
together as an integral unit, but by virtue of the annular grooves
46 presents a flexible connection 48 between the cylindrical
members 44. In this connection the major portion of the cylindrical
surface 50 remains skin coated and only that small portion of the
ends encompassed by the grooved portion 46 which is cut to form the
groove has the broken skin coated portion. In whatever form the
cylindrical members are used, whether in individual members as
shown in FIG. 2 or in the modification shown in FIG. 6, the major
portion of the circumference of the cylindrical member is skin
coated which means that the cells of the foam material are closed
and only in that portion of the cylindrical member where the skin
is broken by the cutting are the cells open.
In forming the jacket, the vertical lines of stitching 24 are first
made to form the vertical pockets in the body and in the skirt
portion. The fillers are then inserted through the open bottom ends
of the bottom pockets of the jacket to first fill the pockets 26 in
the jacket body, after which the transverse stitching 32 is applied
to close the bottom of said pockets 26. The pockets 30 in the skirt
portion are then filled with the filler and the bottom of the skirt
pockets 30 are closed by transverse stitching lines 52. Thus the
pockets in the jacket body are separated from the pockets in the
skirt portion of the jacket with each of said pockets being filled
with cylindrical filler members, except certain of the pockets in
the back portion of the skirt. The front portion of the jacket is
provided with the conventional zipper fastener members 54 and with
the usual cords 56.
By virtue of the cylindrical-shaped fillers and the exterior
surface of the fillers having continuous smooth edges, the jacket
when worn more readily conforms to the shape of the body of the
wearer and provides a smooth surface throughout without sharp
edges, and the cylindrical members can if necessary move or roll
within their respective pockets in relation to the body movement of
the wearer, in contrast to fillers which are other than cylindrical
and which have sharp edges. The cylindrical fillers present large
surface skin coated areas which increases the flotation of the
jacket and only small portions at the ends of said fillers have the
skin coating broken, thus, the jacket formed by this invention has
the advantage of being more wearable and comfortable by conforming
to the curvatures of the body of the wearer and in addition
provides a jacket which will have greater flotation capabilities
and longer periods of use than jackets heretofore produced.
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