U.S. patent application number 13/547125 was filed with the patent office on 2014-01-16 for safety device for barbell.
The applicant listed for this patent is Jih-Ming Chen. Invention is credited to Jih-Ming Chen.
Application Number | 20140018213 13/547125 |
Document ID | / |
Family ID | 49914460 |
Filed Date | 2014-01-16 |
United States Patent
Application |
20140018213 |
Kind Code |
A1 |
Chen; Jih-Ming |
January 16, 2014 |
Safety Device For Barbell
Abstract
A barbell includes a rod having two grab portions and a
protection area is located between the two grab portions. Two load
portions are connected to two ends of the rod respectively. A
metallic sleeve is mounted to the protection area of the rod and
has multiple slits defined through the wall of the sleeve. The
metallic sleeve protects the user from being injured by the broken
ends of the rod when the rod is broken.
Inventors: |
Chen; Jih-Ming; (Taichung
City, TW) |
|
Applicant: |
Name |
City |
State |
Country |
Type |
Chen; Jih-Ming |
Taichung City |
|
TW |
|
|
Family ID: |
49914460 |
Appl. No.: |
13/547125 |
Filed: |
July 12, 2012 |
Current U.S.
Class: |
482/106 |
Current CPC
Class: |
A63B 21/0783 20151001;
A63B 23/1209 20130101; A63B 23/03525 20130101; A63B 23/12 20130101;
A63B 21/0724 20130101 |
Class at
Publication: |
482/106 |
International
Class: |
A63B 21/072 20060101
A63B021/072 |
Claims
1. A barbell comprising: a rod having two grab portions and a
protection area located between the two grab portions, two load
portions connected to two ends of the rod respectively, and a
sleeve having a passage axially defined therethrough and multiple
slits defined in the sleeve, the rod extending through the sleeve
via the passage and the sleeve mounted to the protection area.
2. The barbell as claimed in claim 1, wherein the slits are grouped
into multiple annular portions and the annular portions are
separated from each other by even distance, the slits extend
axially along the sleeve.
3. The barbell as claimed in claim 1, wherein the slits are defined
through a wall of the sleeve.
Description
FIELD OF THE INVENTION
[0001] The present invention relates to a barbell, and more
particularly, to a safety device for a barbell so as to protect the
users when the rod of the barbell is broken.
BACKGROUND OF THE INVENTION
[0002] Weightlifting is a way to exercise muscles of users and the
barbells are widely used in weightlifting. The conventional barbell
generally comprises a rod and two load portions on two ends of the
rod. Each load portion is composed of multiple weights. The user
holds the rod and lifts the load portions to exercise the
muscles.
[0003] When making the rod of the barbell, the rod needs to be
processed by heat treatment so as to have sufficient stiffness to
support the load portions. However, the concentration of stress may
be existed during the heat treatment and the rod can be broken by
the load portions. The rod slightly bends due to the load portions
which may up to 250 kgs and the maximum stress is applied to the
central portion between the two hands of the user. The central
portion even can be treated as a dangerous portion because it is
located at the maximum distance from the load portions. The load
portions apply significant torques to the central portion and the
barbell is lifted and put down so that the rod slightly bends in
opposite directions. The actions may break the rod at the central
portion suddenly, and the user is easily injured.
[0004] The present invention intends to provide a safety device for
a barbell and provides a sleeve at the position where the rod may
potentially be broken.
SUMMARY OF THE INVENTION
[0005] The present invention relates to a barbell and comprises a
rod having two grab portions and a protection area is located
between the two grab portions. Two load portions are connected to
two ends of the rod respectively. A sleeve has a passage axially
defined therethrough and multiple slits are defined in the sleeve.
The rod extends through the sleeve via the passage and the sleeve
is mounted to the protection area.
[0006] The primary object of the present invention is to provide a
safety device for the barbell and has a metallic sleeve mounted to
the protection area of the rod of the barbell. The metallic sleeve
protects the user from being injured by the broken ends of the rod
when the rod is broken.
[0007] The present invention will become more obvious from the
following description when taken in connection with the
accompanying drawings which show, for purposes of illustration
only, a preferred embodiment in accordance with the present
invention.
BRIEF DESCRIPTION OF THE DRAWINGS
[0008] FIG. 1 is a perspective view to show the barbell with the
safety device of the present invention;
[0009] FIG. 2 is an exploded view to show the barbell with the
safety device of the present invention;
[0010] FIG. 3 is a side view to show the barbell with the safety
device of the present invention;
[0011] FIG. 4 is a cross sectional view to show the sleeve mounted
to the rod of the barbell of the present invention;
[0012] FIG. 5 is an enlarged cross sectional view to show the
sleeve mounted to the rod of the barbell of the present
invention;
[0013] FIG. 6 shows the barbell of the present invention is
operated by a user, and
[0014] FIG. 7 illustrates the sleeve accommodates the two broken
ends of the broken rod of the barbell.
DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT
[0015] Referring to FIGS. 1 to 5, the barbell 10 of the present
invention comprises a rod 20 having two end collars 30 respectively
connected to two distal ends 21 thereof and two load portions 50
are positioned to the two ends of the rod 20 by the end collars 30.
Each of the load portions 50 is composed of at least one weight
51.
[0016] The rod 20 has two grab portions 22 so that the user can
grab the rod 20 at the two grab portions 22. A protection area 23
is located between the two grab portions 22.
[0017] Before the load portions 50 are connected to the rod 20, a
sleeve 40 made of metal is mounted to the rod 20. The sleeve 40 has
a passage 41 axially defined therethrough and multiple slits 43 are
defined through the wall 42 of the sleeve 40. The rod 20 extends
through the sleeve 40 via the passage 41 and the sleeve 40 is
mounted to the protection area 23. The material for the sleeve 40
has high strength and low density, such as stainless steel,
Titanium or Titanium alloy. The slits 43 are grouped into multiple
annular portions and the annular portions are separated from each
other by even distance. The slits 43 extend axially along the
sleeve 40 so as to provide the sleeve 40 with flexibility. The
weights 51 are then mounted to the rod 20 and secured by the end
collars 30.
[0018] The two grab portions 22 are located at two ends of the
sleeve 40 so that the user 60 grabs the grab portions 22 by two
hands 61 and lifts the barbell 10 to exercise the muscles.
[0019] As shown in FIG. 6, in case the rod 20 is broken due to any
potential or exterior factors, because the sleeve 40 is made by
durable material which has better ductility so that the energy of
the breakage of the rod 20 is absorbed by the sleeve 40 and the two
broken ends of the rod 20 are still accommodated in the sleeve 40
as shown in FIG. 7. The broken ends of the broken rod 20 cannot
injure the user 60.
[0020] The advantages of the present invention are that when the
rod 20 is broken due to unexpected exterior or potential factors,
the metallic sleeve 40 having better ductility can enclose the
broken position of the rod 20 and protect the user.
[0021] The sleeve 40 is made by durable material which has better
ductility so that when the rod 20 is broken, the energy of the
breakage of the rod 20 is absorbed by the sleeve 40 and the two
broken ends of the rod 20 are still accommodated in the sleeve
40.
[0022] The sleeve 40 has slits 41 which provide flexibility to
allow the sleeve 40 to be bent to accommodate the two broken ends
of the rod 20.
[0023] While we have shown and described the embodiment in
accordance with the present invention, it should be clear to those
skilled in the art that further embodiments may be made without
departing from the scope of the present invention.
* * * * *