U.S. patent application number 11/035822 was filed with the patent office on 2006-07-20 for pull cord for exercising device.
Invention is credited to Kun-Tan Kung.
Application Number | 20060160679 11/035822 |
Document ID | / |
Family ID | 36684691 |
Filed Date | 2006-07-20 |
United States Patent
Application |
20060160679 |
Kind Code |
A1 |
Kung; Kun-Tan |
July 20, 2006 |
Pull cord for exercising device
Abstract
A pull cord for an exercising device includes an elastic cord
body, and an outer layer mounted on an outer surface of the cord
body. Thus, the outer layer is formed by the knitting yarns which
are knitted onto and enclosed around the outer surface of the cord
body so as to protect the cord body efficiently, so that the cord
body does not directly contact a user's hands, thereby preventing
the cord body from being worn out, and thereby enhancing the
lifetime of the cord body. In addition, when the cord body is
broken due to tensile action during a long-term utilization, the
broken cord body is enclosed in the outer layer, thereby preventing
the broken cord body from hurting the user's body.
Inventors: |
Kung; Kun-Tan; (Long Ching
Hsiang, TW) |
Correspondence
Address: |
NIKOLAI & MERSEREAU, P.A.
900 SECOND AVENUE SOUTH
SUITE 820
MINNEAPOLIS
MN
55402
US
|
Family ID: |
36684691 |
Appl. No.: |
11/035822 |
Filed: |
January 14, 2005 |
Current U.S.
Class: |
482/121 |
Current CPC
Class: |
D04B 9/44 20130101; A63B
21/0552 20130101; A63B 21/0555 20130101; A63B 21/00043 20130101;
A63B 21/0004 20130101 |
Class at
Publication: |
482/121 |
International
Class: |
A63B 21/02 20060101
A63B021/02 |
Claims
1. A pull cord, comprising: an elastic cord body; an outer layer
mounted on an outer surface of the cord body.
2. The pull cord in accordance with claim 1, wherein the outer
surface of the cord body has a whole length that is enclosed by the
outer layer completely and closely.
3. The pull cord in accordance with claim 1, wherein the outer
layer is formed by a plurality of knitting yarns.
4. The pull cord in accordance with claim 3, wherein the knitting
yarns are knitted onto and enclosed around the outer surface of the
cord body by a cylinder type knitting machine.
5. The pull cord in accordance with claim 3, wherein the knitting
yarns have different colors.
6. The pull cord in accordance with claim 4, wherein the knitting
machine includes a lower socket, an upper socket mounted on the
lower socket, and a plurality of latch needles each mounted on the
upper socket and the lower socket to move upward and downward
therewith.
7. The pull cord in accordance with claim 6, wherein the upper
socket and the lower socket have a connection formed with
corrugated slopes matching each other, so that each of the latch
needles is moved upward and downward with the corrugated slopes of
the upper socket and the lower socket.
8. The pull cord in accordance with claim 7, wherein the corrugated
slopes of the upper socket and the lower socket have a number
corresponding to that of the knitting yams.
9. The pull cord in accordance with claim 6, wherein the knitting
yams are knitted onto and enclosed around the outer surface of the
cord body by the latch needles so as to protect the cord body.
10. The pull cord in accordance with claim 1, wherein when the cord
body is broken due to tensile action, the broken cord body is
enclosed in the outer layer, thereby preventing the broken cord
body from hurting a user's body.
11. The pull cord in accordance with claim 1, wherein the outer
layer has a smooth outer surface.
Description
BACKGROUND OF THE INVENTION
[0001] 1. Field of the Invention
[0002] The present invention relates to a pull cord, and more
particularly to a pull cord for an exercising device, such as a
chest expander or the like.
[0003] 2. Description of the Related Art
[0004] A conventional exercising device, such as a chest expander
1, in accordance with the prior art shown in FIG. 9 comprises an
elastic pull cord 12, and two handles 11. However, the outer
surface of the elastic pull cord 12 directly contacts a user's
hands, so that the outer surface of the elastic pull cord 12 is
easily worn out due to rubbing, thereby decreasing the lifetime of
the elastic pull cord 12. In addition, when the elastic pull cord
12 is broken due to tensile action during a long-term utilization,
the broken elastic pull cord 12 is easily sprung outward to a
user's body, thereby causing danger to the user. Further, the
elastic pull cord 12 has a single color, thereby decreasing the
outer appearance of the exercising device.
SUMMARY OF THE INVENTION
[0005] In accordance with the present invention, there is provided
a pull cord, comprising an elastic cord body; and an outer layer
mounted on an outer surface of the cord body.
[0006] The primary objective of the present invention is to provide
a pull cord having a protective outer layer to protect the pull
cord.
[0007] Another objective of the present invention is to provide a
pull cord for an exercising device, wherein the outer layer is
formed by the knitting yarns which are knitted onto and enclosed
around the outer surface of the cord body by the latch needles so
as to protect the cord body efficiently, so that the cord body does
not directly contact a user's hands, thereby preventing the cord
body from being worn out due to friction, and thereby enhancing the
lifetime of the cord body.
[0008] A further objective of the present invention is to provide a
pull cord for an exercising device, wherein when the cord body is
broken due to tensile action during a long-term utilization, the
broken cord body is enclosed in the outer layer, thereby preventing
the broken cord body from hurting the user's body.
[0009] A further objective of the present invention is to provide a
pull cord for an exercising device, wherein the outer layer is
formed by the knitting yarns having different colors, thereby
enhancing the outer appearance of the pull cord.
[0010] A further objective of the present invention is to provide a
pull cord for an exercising device, wherein the outer layer has a
smooth outer surface, thereby providing a comfortable sensation to
the user when touching the outer layer.
[0011] Further benefits and advantages of the present invention
will become apparent after a careful reading of the detailed
description with appropriate reference to the accompanying
drawings.
BRIEF DESCRIPTION OF THE DRAWINGS
[0012] FIG. 1 is a perspective view of an exercising device in
accordance with the preferred embodiment of the present
invention;
[0013] FIG. 2 is a plan cross-sectional view of the exercising
device taken along line 2-2 as shown in FIG. 1;
[0014] FIG. 3 is a perspective view of a knitting machine in
accordance with the preferred embodiment of the present
invention;
[0015] FIG. 4 is an exploded perspective view of the knitting
machine as shown in FIG. 3;
[0016] FIG. 5 is a plan view of the knitting machine as shown in
FIG. 3;
[0017] FIG. 6 is a partially enlarged exploded perspective view of
upper socket and lower socket of the knitting machine as shown in
FIG. 3;
[0018] FIG. 7 is a plan view of the upper socket and lower socket
of the knitting machine as shown in FIG. 6;
[0019] FIG. 8 is a perspective view of knitting yams of the
knitting machine as shown in FIG. 6; and
[0020] FIG. 9 is a perspective view of a conventional exercising
device in accordance with the prior art.
DETAILED DESCRIPTION OF THE INVENTION
[0021] Referring to the drawings and initially to FIGS. 1 and 2, an
exercising device, such as a chest expander 2, in accordance with
the preferred embodiment of the present invention comprises a pull
cord 20, and two handles 21.
[0022] The pull cord 20 includes an elastic cord body 22, and an
outer layer 24 mounted on an outer surface of the cord body 22. The
outer surface of the cord body 22 has a whole length that is
enclosed by the outer layer 24 completely and closely. The outer
layer 24 is formed by a plurality of knitting yarns 50 (see FIG. 8)
which are knitted onto and enclosed around the outer surface of the
cord body 22 by a cylinder type knitting machine 40. Preferably,
the knitting yarns 50 have different colors. The outer layer 24 has
a smooth outer surface 240.
[0023] Referring to FIGS. 3-8 with reference to FIGS. 1 and 2, the
knitting machine 40 includes a fixing seat 41, a cylindrical needle
spool 42 mounted on the fixing seat 41, a plurality of latch
needles 421 each mounted on the needle spool 42 and each having a
distal end provided with a hook 422, a first cam 43 mounted on the
needle spool 42 and rested on the fixing seat 41, a lower socket 44
mounted on the needle spool 42 and rested on the first cam 43, an
upper socket 45 mounted on the needle spool 42 and rested on the
lower socket 44, a housing 46 mounted on the upper socket 45 and
the lower socket 44 and rested on the first cam 43, and a plurality
of yarn guide units 47 mounted on an outer wall of the housing
46.
[0024] The upper socket 45 and the lower socket 44 have a
connection formed with corrugated slopes 451 and 441 matching each
other. The number of corrugated slopes 451 and 441 of the upper
socket 45 and the lower socket 44 is corresponding to that of the
knitting yarns 50.
[0025] The housing 46 is locked on the lower socket 44 by locking
screws 461. The housing 46 has a bottom formed with a second cam
462 rested on the first cam 43, and a drive belt (not shown) is
mounted on the second cam 462 of the housing 46 and driven by a
motor (not shown) to drive and rotate the housing 46, so that the
upper socket 45 and the lower socket 44 are rotated, and the hook
422 of each of the latch needles 421 is driven by the upper socket
45 and the lower socket 44 to move upward and downward.
[0026] Each of the yarn guide units 47 includes a substantially
L-shaped support arm 471 having a first section secured on the
outer wall of the housing 46 by screws 474, a support rack 472
mounted on a second section of the support arm 471 for supporting
the knitting yams 50, a guide rack 475 having a lower portion
secured between the outer wall of the housing 46 and the first
section of the support arm 471 by the screws 474 and an upper
portion formed with a guide hole 476, and a positioning hook 477
having a first end pivotally mounted on the upper portion of the
guide rack 475 and a second end hooked on the knitting yarns
50.
[0027] In operation, the cord body 22 is placed on the knitting
machine 40. Then, the knitting yarns 50 placed on the support rack
472 of each of the yarn guide units 47 are hooked by the latch
needles 421. When the housing 46 is rotated through a circle, the
guide rack 475 and the support rack 472 are also rotated through a
circle, so that the latch needles 421 hooking the knitting yarns 50
are also rotated through a circle. At this time, the latch needles
421 are driven by the corrugated slopes 451 and 441 of the upper
socket 45 and the lower socket 44 to move upward and downward, so
that the knitting yarns 50 are knitted on the cord body 22 by the
latch needles 421 when the latch needles 421 are rotated through a
circle, thereby forming the outer layer 24 on the outer surface of
the cord body 22.
[0028] Accordingly, the outer layer 24 is formed by the knitting
yarns 50 which are knitted onto and enclosed around the outer
surface of the cord body 22 by the latch needles 421 so as to
protect the cord body 22 efficiently, so that the cord body 22 does
not directly contact a user's hands, thereby preventing the cord
body 22 from being worn out due to friction, and thereby enhancing
the lifetime of the cord body 22. In addition, when the cord body
22 is broken due to tensile action during a long-term utilization,
the broken cord body 22 is enclosed in the outer layer 24, thereby
preventing the broken cord body 22 from hurting the user's body.
Further, the outer layer 24 is formed by the knitting yarns 50
having different colors, thereby enhancing the outer appearance of
the pull cord. Further, the outer layer 24 has a smooth outer
surface 240, thereby providing a comfortable sensation to the user
when touching the outer layer 24.
[0029] Although the invention has been explained in relation to its
preferred embodiment(s) as mentioned above, it is to be understood
that many other possible modifications and variations can be made
without departing from the scope of the present invention. It is,
therefore, contemplated that the appended claim or claims will
cover such modifications and variations that fall within the true
scope of the invention.
* * * * *