U.S. patent application number 10/850933 was filed with the patent office on 2005-11-24 for durable case.
Invention is credited to Hu, Bobby.
Application Number | 20050258010 10/850933 |
Document ID | / |
Family ID | 35374120 |
Filed Date | 2005-11-24 |
United States Patent
Application |
20050258010 |
Kind Code |
A1 |
Hu, Bobby |
November 24, 2005 |
Durable case
Abstract
A blow-molded plastic case is made of plastic via a blow-molding
process. The blow-molded plastic case includes a first shell, a
second shell pivotally connected with the first shell and at least
one protective ball attached to the first shell for preventing the
first shell from contact with a surface such as the ground, a
table, a board or the like.
Inventors: |
Hu, Bobby; (Taichung,
TW) |
Correspondence
Address: |
NIKOLAI & MERSEREAU, P.A.
900 SECOND AVENUE SOUTH
SUITE 820
MINNEAPOLIS
MN
55402
US
|
Family ID: |
35374120 |
Appl. No.: |
10/850933 |
Filed: |
May 21, 2004 |
Current U.S.
Class: |
190/37 |
Current CPC
Class: |
A45C 13/36 20130101 |
Class at
Publication: |
190/037 |
International
Class: |
A45C 013/36; B65D
045/16 |
Claims
1. A blow-molded plastic case made of plastic via blow-molding,
wherein the blow-molded plastic case includes a first shell, a
second shell pivotally connected with the first shell and at least
one protective ball attached to the first shell for preventing the
first shell from contact with a surface.
2. The blow-molded plastic case according to claim 1 wherein the
first shell defines at least one recess for receiving a portion of
the protective ball.
3. The blow-molded plastic case according to claim 1 including
several protective balls attached to the first shell.
4. The blow-molded plastic case according to claim 3 wherein the
first shell defines a corresponding number of recesses for
receiving the protective balls.
5. The blow-molded plastic case according to claim 1 including at
least one protective ball attached to each of two corners near an
edge of the first shell.
6. The blow-molded plastic case according to claim 5 including a
series of protective balls attached to an opposite edge of the
first shell.
7. The blow-molded plastic case according to claim 5 including at
least one protective ball attached to each of two corners near an
opposite edge of the first shell.
8. The blow-molded plastic case according to claim 1 wherein the
protective ball is a steel ball.
9. The blow-molded plastic case according to claim 1 including at
least one protective ball attached to a lower face of the first
shell and at least one protective ball attached to each of two
lateral faces of the first shell.
10. The blow-molded plastic case according to claim 9 including at
least one protective ball attached to each of two lateral faces of
the second shell.
11. The blow-molded plastic case according to claim 10 including a
first handle formed on the first shell, a second handle formed on
the second shell, at least one protective ball attached to the
first handle and at least one protective ball attached to the
second handle.
12. A blow-molded plastic case made of plastic via blow-molding,
wherein the blow-molded plastic case includes a first shell for
contact with a surface, a second shell pivotally connected with the
first shell, a first handle formed on the first shell, a second
handle formed on the second shell and at least one protective ball
attached to each of the handles.
13. The blow-molded plastic case according to claim 12 including
several protective balls attached to each of the handles.
14. The blow-molded plastic case according to claim 12 wherein each
of the handles defines at least one recess for receiving a portion
of the protective ball.
15. A blow-molded plastic case made of plastic via blow-molding,
wherein the blow-molded plastic case includes a first shell for
contact with a surface, a second shell pivotally connected with the
first shell, a handle formed on one of the shells and at least one
protective ball attached to the handle.
16. The blow-molded plastic case according to claim 15 wherein the
handle is molded as one piece.
17. The blow-molded plastic case according to claim 15 wherein the
handle includes several protective balls formed thereon.
18. The blow-molded plastic case according to claim 15 wherein the
handle defines at least one recess for receiving a portion of the
protective ball.
Description
FIELD OF INVENTION
[0001] The present invention relates to a durable case and, more
particularly, to a blow-molded case with protection against
abrasion.
BACKGROUND OF INVENTION
[0002] FIGS. 8 and 9 show a conventional blow-molded plastic case
10 made by means of a blow-molding process. The blow-molded plastic
case 10 includes two shells each including a thin wall. The thin
walls of the blow-molded plastic case 10 and, more particularly,
lower corners are in contact with the ground, a table or a board.
Thus, the lower corners of the blow-molded plastic case 10 wear
away after some time of use.
[0003] The present invention is therefore intended to obviate or at
least alleviate the problems encountered in prior art.
SUMMARY OF INVENTION
[0004] It is the primary objective of the present invention to
provide a blow-molded case with protection against abrasion.
[0005] According to the present invention, a case is made of
plastic by means of a blow-molding process. The blow-molded plastic
case includes a first shell, a second shell pivotally connected
with the first shell and at least one protective ball attached to
the first shell for preventing the first shell from contact with a
surface such as the ground, a table, a board or the like.
[0006] Other objects, advantages, and novel features of the
invention will become more apparent from the following detailed
description when taken in conjunction with the attached
drawings.
BRIEF DESCRIPTION OF DRAWINGS
[0007] The present invention will be described through detailed
illustration of five embodiments referring to the drawings.
[0008] FIG. 1 is a perspective view of a blow-molded case according
to a first embodiment of the present invention.
[0009] FIG. 2 is a cross-sectional partial view of the blow-molded
plastic case of FIG. 1 and shows several steel balls pressed into
the blow-molded plastic case when the blow-molded plastic case is
still hot and soft.
[0010] FIG. 3 is similar to FIG. 2 but shows the steel balls fit in
the blow-molded plastic case after the blow-molded plastic case
becomes cold and hard.
[0011] FIG. 4 is a perspective view of a blow-molded plastic case
according to a second embodiment of the present invention.
[0012] FIG. 5 is a perspective view of a blow-molded plastic case
according to a third embodiment of the present invention.
[0013] FIG. 6 is a perspective view of a blow-molded plastic case
according to a fourth embodiment of the present invention.
[0014] FIG. 7 is a perspective view of a blow-molded plastic case
according to a fifth embodiment of the present invention.
[0015] FIG. 8 is a side view of a conventional blow-molded plastic
case.
[0016] FIG. 9 is a cutaway view of the blow-molded plastic case
shown in FIG. 8.
DETAILED DESCRIPTION OF EMBODIMENTS
[0017] Referring to FIG. 1, according to a first embodiment of the
present invention, a blow-molded plastic case 20 is made of plastic
by means of a blow-molding process. The blow-molded plastic case 20
includes a first shell 21 and a second shell 22. The shells 21 and
22 both include a first edge and a second edge opposite to the
first edge. The first edge of the first shell 21 is pivotally
connected with the first edge of the second shell 22. The second
edge of the first shell 21 can be locked to the second edge of the
second shell 22 by means of snap fasteners (not numbered). The
first shell 21 is formed with a handle 26 at the second edge. The
second shell 22 is formed with a handle 28 at the second edge. The
handles 26 and 28 can be combined.
[0018] The first shell 21 includes a face 23 ("lower face 23") that
is designed for contact with a surface such as the ground, a table
and a board. A group of steel balls 30 is attached to the lower
face 23 of the first shell 21 near the first edge. A group of steel
balls 30 is attached to the lower face 23 of the first shell 21 at
each of two corners near the second edge. Each of the steel balls
30 is a steel ball. By means of the steel balls 30, the lower face
23 of the first shell 21 is protected from scratch or abrasion
because it does not contact the ground, table or board.
[0019] Referring to FIG. 2, the blow-molded plastic case 20
includes several recesses 24 defined in the lower face 23 thereof.
The recesses 24 are defined during the blow-molding process. The
steel balls 30 are put into the recesses 24 when the blow-molded
plastic case 20 is hot and soft right after the blow-molding
process.
[0020] Referring to FIG. 3, the blow-molded plastic case 20
contracts at it cools down. Finally, the blow-molded plastic case
20 becomes hard. Thus, the steel balls 30 are fit in the recesses
24.
[0021] FIG. 4 shows a blow-molded plastic case 20 according to a
second embodiment of the present invention. The second embodiment
is identical to the first embodiment except that a group of steel
balls 30 is attached to the lower face 23 of the first shell 21 at
each of four corners thereof.
[0022] FIG. 5 shows a blow-molded plastic case 20 according to a
third embodiment of the present invention. The third embodiment is
identical to the second embodiment except for several things.
Firstly, a group of steel balls 30 is attached to each of two
lateral faces of the first shell 21. Secondly, a group of steel
balls 30 is attached to each of two lateral faces of the second
shell 22. Thirdly, a group of steel balls 30 is attached to the
handle 26 formed on the second edge of the first shell 21.
Fourthly, a group of steel balls 30 is attached to the handle 28
formed on the second edge of the second shell 22.
[0023] FIG. 6 shows a blow-molded plastic case 20 according to a
fourth embodiment of the present invention. The fourth embodiment
is identical to the third embodiment except that no steel ball 30
is attached to the first shell 21 and the second shell 22.
[0024] FIG. 7 shows a blow-molded plastic case 20 according to a
fifth embodiment of the present invention. The fifth embodiment is
identical to the fourth embodiment except that only one of the
shells 21 and 22 is formed with a handle 52 to which several steel
balls 30 are attached.
[0025] The present invention has been described through detailed
illustration of five embodiments. Those skilled in the art can
derive variation from the embodiments without departing from the
scope of the present invention. Therefore, the embodiments shall
not limit the scope of the present invention defined in the
claims.
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