U.S. patent application number 09/808891 was filed with the patent office on 2002-02-07 for knee pad for figure skating.
Invention is credited to Adamson, Robert Lynn.
Application Number | 20020013962 09/808891 |
Document ID | / |
Family ID | 26909916 |
Filed Date | 2002-02-07 |
United States Patent
Application |
20020013962 |
Kind Code |
A1 |
Adamson, Robert Lynn |
February 7, 2002 |
Knee pad for figure skating
Abstract
A knee pad for providing fall protection of a knee is disclosed.
The knee pad is a flexible single piece flat pad made of encased
resilient polymeric material and is configured to have a top edge
portion having a crown for protecting patella of a knee, a pair of
first and second side edge portions, and a bottom edge portion. The
first side edge portion has an extended flap for protecting a side
of the knee. The knee pad can be reversed, front to back, for
selectively protecting either medial aspect or lateral aspect of
the knee. Furthermore, the knee pad can be held in position by a
body tight garment without additional attachment devices. Also
disclosed is a multifunctional body protection pad that can be used
interchangeably for providing fall protection of a knee or a
hip.
Inventors: |
Adamson, Robert Lynn;
(Boynton Beach, FL) |
Correspondence
Address: |
Dr. Yi Li
CUSPA Technology Law Associates
11820 SW 107 Ave.
Miami
FL
33176
US
|
Family ID: |
26909916 |
Appl. No.: |
09/808891 |
Filed: |
March 16, 2001 |
Related U.S. Patent Documents
|
|
|
|
|
|
Application
Number |
Filing Date |
Patent Number |
|
|
60215315 |
Jun 30, 2000 |
|
|
|
Current U.S.
Class: |
2/24 |
Current CPC
Class: |
A41D 13/0575 20130101;
A41D 13/065 20130101 |
Class at
Publication: |
2/24 |
International
Class: |
A41D 013/06; A41D
013/00 |
Claims
I claim:
1. A knee pad for providing fall protection of a knee comprising a
flat single piece of flexible material made of encased resilient
polymeric material, wherein said knee pad is configured to have a
top edge portion having a crown for protecting patella of a knee, a
pair of first and second side edge portions extended from said top
edge portion, and a bottom edge portion to which said first and
second side edge portions extend, said first side edge portion
having an extended flap for protecting a side of said knee, wherein
a vertical center line of said knee pad is positioned from a
highest point of said crown straight down, a ratio of a distance
from said vertical center line to said first side edge versus a
distance from said vertical center line to said second side edge is
greater than 1.0.
2. The knee pad of claim 1 having a thickness ranging from about
0.12 inch to about 0.40 inch.
3. The knee pad of claim 1 having a height from an edge of said top
edge portion to an edge of said bottom edge portion ranging from
about 5 inches to 8 inches.
4. The knee pad of claim 1 having a width ranging from about 7
inches to about 9 inches.
5. The knee pad of claim 1, wherein said side of said knee include
medial aspect of said knee and lateral aspect of said knee, said
medial aspect of said knee including medial epicondyle of femur,
the medial condyle of the tibia, and the immediate surrounding
tissue; said lateral aspect of said knee including the area between
the lateral epicondyle of femur and the head of the fibuta, and the
immediate surrounding tissue.
6. The knee pad of claim 5, wherein said knee pad can be reversed,
front to back, for selectively protecting a desired side of said
knee.
7. The knee pad of claim 5, wherein said knee pad can be reversed,
front to back, for selectively protecting said knee of one leg and
said knee of other leg interchangeably.
8. The knee pad of claim 1, wherein said knee pad can be held in
position by a body tight garment without additional attachment
devices.
9. The knee pad of claim 8, wherein said body tight garment
includes leotards, tights, leggings, and tight pants.
10. The knee pad of claim 1 further comprising a layer of a
material on a surface of said knee pad, wherein said material
enhances attachment between said knee pad, and contacting surfaces
of human body and said body tight garment.
11. The knee pad of claim 1, wherein said knee pad can be used in
conjunction with additional attachment devices.
12. A multifunctional body protection pad for providing fall
protection of a knee and a hip comprising a flat single piece of
flexible material made of encased resilient polymeric material,
wherein said multifunctional body protection pad is configured to
have a top edge portion having a crown for protecting patella of a
knee, a pair of first and second side edge portions extended from
said top edge portion, and a bottom edge portion to which said
first and second side edge portions extend, said first side edge
portion having an extended flap for protecting a side of said knee,
wherein said multifunctional body protection pad can be used as a
knee pad and a hip pad interchangeably, by inserting said
multifunctional body protection pad in a body tight garment without
additional attachment devices.
13. The multifunctional body protection pad of claim 12 having a
thickness ranging from about 0.12 inch to about 0.40 inch.
14. The multifunctional body protection pad of claim 12 having a
height from an edge of said top edge portion to an edge of said
bottom edge portion ranging from about 5 inches to 8 inches.
15. The multifunctional body protection pad of claim 12 having a
width ranging from about 7 inches to 9 inches.
16. A hip pad for providing fall protection of a hip comprising a
flat single piece of flexible material made of encased resilient
polymeric material, wherein said hip pad is configured to have a
top edge portion having a crown, a pair of first and second side
edge portions extended from said top edge portion, and a bottom
edge portion to which said first and second side edge portions
extend, said first side edge portion having an extended flap,
wherein a vertical center line of said hip pad is positioned from a
highest point of said crown straight down, a ratio of a distance
from said vertical center line to said first side edge versus a
distance from said vertical center line to said second side edge is
greater than 1.0.
17. The hip pad of claim 16 having a height from an edge of said
top edge portion to an edge of said bottom edge portion ranging
from about 5 inches to 8 inches.
18. The hip pad of claim 16 having a width ranging from about 7
inches to 9 inches.
Description
FIELD OF THE INVENTION
[0001] The present invention relates in general to the field of
protective knee pads, and more particularly to a flexible, thin,
strapless knee pad to provide fall protections of the front and
sides of knees, particularly suitable for figure skaters. The
present invention also relates to a multifunctional body protection
pad that can be used either as a knee pad or a hip pad.
BACKGROUND OF THE INVENTION
[0002] Skating, such as figure skating, ice skating, and in-line
skating, are popular sports. Among different types of skating,
figure skating has additional specific requirements. It requires
speed, grace, technique and athleticism to perform an artistic
presentation. Jumps are an integral part of a figure skater's
performance, as is the aesthetic appearance that they present to
the audience.
[0003] Unfortunately, skating must contend with various types of
falls. These falls are random and essentially expose the skaters'
body to 360 degrees potential injury. Knee, hip, elbow and back
injuries are common.
[0004] Competitive figure skaters practice their technique and
jumps many hours every week. During these practices they fall
repeatedly. These falls inevitably result in the skater's knees
impacting the ice repeatedly and with great force. Injuries to the
knee joint and surrounding tissue are en ever-present danger. These
injuries range from hematoma to fractures. Various pads have been
designed to protect skaters, including knee pads, elbow pads, and
hip pads.
[0005] All available knee pads are constructed from thick and bulky
materials in order to achieve sufficient impact energy absorption
for fall protection. These materials, if used in a thinner form,
would offer less than adequate protection from injury. The thick
and bulky feature is not suitable for the desired aesthetic
appearance of skaters, in particular, figure skaters. In addition,
available knee pads also requires straps or elastic tubes to attach
the knee pads to the legs of a skater. Without straps or other
means of attachment, the knee pad will fall because of their
thickness, and lack of flexibility. These attachments impose
unnatural pressure on a skater's legs, which hinder free movements
of the legs, particularly for a long period time of exercise or
performance. Moreover, straps and elastic tubes bunch up behind the
knee, which further generate unwanted compression, and restrict
skater's flexibility that is necessary to perform certain figure
skating manoeuvres. Additionally, the straps and elastic tubes also
have negative effects on a skater's aesthetic appearance.
[0006] Furthermore, most available knee pads provide protection to
the front of the knee, but not as much protection to the sides of
the knee. However, the medial aspect of the knee, particularly
medial epicondyle of femur and the medial condyle of the tibia, or
lateral aspect of the knee, particularly the area between the
lateral epicondyle of femur and the head of the fibuta, is most
often the area that impacts the ice during a fall after a missed
jump. U.S. Pat. No. 5,987,643 (to Beutler) discloses a knee pad
including side walls to protect the side of the knee. However, the
knee pad does not have sufficient extension on the side walls to
cover the head of the fibuta, a critical coverage area for figure
skaters. In addition, the knee pad depends on straps or other
attaching structures to attach the knee pad to a user's leg.
[0007] On the other hands, several hip pads have been designed for
providing fall protections of a person's hip. U.S. Pat. No.
5,426,786 (to Calvin) discloses a hip pad which can be inserted
within the pants of the wearer. The hip pad is a single piece flat
pad configured to cover both sides of hips and buttocks area.
Although the pad provides protection of hips and buttocks area, it
has a large size and would be apparent if it is worn by a figure
skater, which would cause undesired distortion of a natural body
shape.
[0008] U.S. Pat. No. 5,717,997 discloses a form-fitting garment
having side pockets that allow hip pads for the protection of the
greater trochanter. The hip pads are used with the support of the
garment. The garment restricts body flexibility, and the pads also
detract from natural body contour aesthetics.
[0009] Therefore, it is apparent there exists a special need for a
knee pad and a hip pad particularly suitable for figure skating,
which would provide fall protections without hindering natural body
movements, and meet aesthetic requirements.
SUMMARY OF THE INVENTION
[0010] In one embodiment, the present invention provides a knee pad
for providing fall protection of a knee. The knee pad comprises a
flat single piece of flexible material made of encased resilient
polymeric material. The knee pad is configured to have a top edge
portion having a crown for protecting patella of a knee, a pair of
first and second side edge portions extended from the top edge
portion, and a bottom edge portion to which the first and second
side edge portions extend. The first side edge portion has an
extended flap for protecting a side of the knee.
[0011] The knee pad of the present invention is specifically
designed to protect patella of the knee, medial or lateral aspect
of the knee, particularly the head of fibula and an immediate
surrounding tissue. The knee pad can be reversed, front to back,
for selectively protecting a desired side of a knee, and further
for selectively protecting a knee of a desired leg
interchangeably.
[0012] The knee pad of the present invention is strapless, and can
be held in position by a body tight garment without additional
attachment devices.
[0013] In a further embodiment, the knee pad of the present
invention can also function as a multifunctional body protection
pad for providing fall protection of a knee or a hip
interchangeably. The multifunctional body protection pad can be
used either as a knee pad or as a hip pad at the user's discretion,
by inserting the pad in a body tight garment without additional
attachment devices.
[0014] Moreover, if the multifunctional body protection pad is only
used as a hip pad, the thickness of the pad can be increased for
providing further protection depending on user's body weight.
BRIEF DESCRIPTION OF THE DRAWINGS
[0015] The file of this patent application contains at least one
drawing executed in color photographs. Copies of this patent
application publication with color photographs will be provided by
the Office upon request and payment of the necessary fee.
[0016] The above and other objects, features and other advantages
of the present invention will be more clearly understood from the
following detailed description taken in conjunction with the
accompanying drawings, in which:
[0017] FIG. 1 is a perspective view of the front side of the knee
pad in one embodiment of the present invention.
[0018] FIG. 2 shows a knee pad of the present invention held by a
hand.
[0019] FIG. 3 shows a knee pad of the present invention worn on a
skater's leg.
[0020] FIG. 4 shows a figure skater wearing two pieces of the
multifunctional body protection pad of one embodiment of the
present invention over one hip and one knee area.
DETAILED DESCRIPTION OF THE INVENTION
[0021] In one embodiment, the present invention provides a
flexible, thin, strapless knee pad to provide fall protections of
the front and sides of knees. For the purpose of the present
invention, a side of a knee denotes either the medial aspect or the
lateral aspect of a knee. The medial aspect of a knee includes
medial epicondyle of femur, the medial condyle of the tibia, and
the immediate surrounding tissue. The lateral of a knee includes
the area between the lateral epicondyle of femur and the head of
the fibuta, and the immediate surrounding tissue.
[0022] The knee pad comprises a flexible single piece flat pad made
of encased resilient polymeric material. As shown in FIG. 1, the
knee pad (8) is configured to have a top edge portion (1) having a
crown (2) for protecting patella, the kneecap, a first side edge
portion (3) and second side edge portion (4) extended from the top
edge portion, and a bottom edge portion (5) to which the first and
second side edge portions extend. The first side edge portion has
an extended flap (6) for protecting a side of said knee. The knee
pad is asymmetric. Based on the vertical center line (10)
positioned from the highest point of the crown straight down, the
ratio of a distance from the vertical center line to the first side
edge versus a distance from the vertical center line to the second
side edge is greater than 1.0. Preferably, the ratio is in a range
from about 1.2 to about 1.5.
[0023] The knee pad has a height from the edge of the top edge
portion to the edge of the bottom edge portion ranging from about 5
inches to 8 inches. The width of the knee pad ranges from about 7
inches to about 9 inches. The size of the knee pad is designed
depending on the user's body size, more particularly, circumference
and height of a knee, and to a lesser degree, on total body height
and weight. Human knee circumference ranges from about 9.5 to about
18 inches. Optimum coverage of knee circumference is about 75% of
the total. Optimum coverage of knee height, from proximal to distal
of a leg, is about 5 to 8 inches, which is about 2 to about 3
inches above the patella, and about 3 to about 5 inches below the
patella. In general, the larger a person's body, and heavier a
person, the larger a knee pad should be used to provide a
sufficient protection. However, when a knee pad is too larger, the
knee pad carries more weigh, and it would be more difficult to
maintain the position with a high degree of body movements.
Therefore, the size of a knee pad should be appropriately selected
based on the user's size to achieve a proper balance between a
sufficient protection and positional stability of the knee pad.
[0024] The asymmetrical shape of the knee pad is for the purpose of
achieving anatomical symmetry when the knee pad is put in use. The
crown (2) of the pad covers and protects the patella and the
immediate surrounding tissue from injury. Since the medial aspect
and lateral aspect of the knee are most often the area that impact
the ice during a fall after a missed jump, the knee pad of the
present invention is specifically designed to protect the sides of
the knees.
[0025] The extended flap (6) of the first side edge portion of the
knee pad is designed to cover and protect a side of a knee. When
the first side edge portion of the knee pad is placed over the
lateral aspect of a knee, the extended flap provides coverage and
protection of the head of the fibula and the immediate surrounding
tissue, from injury. When the knee pad is reversed, front to back,
the first side edge portion provides coverage and protection of
medial aspect of the knee, particularly the medial condyles of the
femur, and tibia and surrounding tissue, from injury. The knee pad
of the present invention is malleable and highly flexible, it wraps
over the sides of the knee joint. User may choose either lateral
aspect or medial aspect coverage by reversing the knee pad to cover
the desired area. The second side edge portion of the knee pad
shown in FIG. 1 has a straight edge. However, a curved edge on this
side is also suitable for the purpose of the present invention.
[0026] The knee pad has a thickness ranging from about 0.12 inch to
about 0.40 inch, preferably from about 0.15 inch to about 0.30
inch. This thickness is much thinner than existing knee pads, where
multiple layers of fabric and foam materials are typically used to
provide impact energy absorption.
[0027] The knee pad of the present invention is made of an encased
resilient polymeric material known in the art for absorbing and
dispersing pressure and impact energy in a thin form (from about
0.12 inch to about 0.30 inch). Suitable examples of the resilient
polymeric material include polyurethanes, such as existing
commercial products Isogel.TM. manufactured by Pittsburgh Plastics
(Pittsburgh, Pa.) and Akton.RTM. polymer manufactured by Action
Products, Inc. (22 N. Mulberry Street, Hagerstown, Md. 21704). In
the preferred embodiment, Akton.RTM. polymer is used. The
Akton.RTM. polymer is also called viscoelastic polymer, which
exhibits very high elasticity and malleableness. The knee pad is
constructed by encasing the Akton.RTM. polymer in a vinyl envelope
to form a flat single piece pad with the configuration described
above. The knee pad is latex-free, and has a tissue-like
malleableness, and a similar shear characteristics of human skin.
The knee pad provides strong impact energy absorption even with a
relatively low degree of thickness. The Akton.RTM. polymer has
following properties:
1 Property Value Rubber Properties in Tension (Peak Tensile) 18.4
psi (ASTM D 412-98a) Elongation 1000% Compression Deflection (ASTM
D575-91(96) 25% 0.63 lb/in.sup.2 Tear Strength (ASTM D 624-98 Die C
Tear) 3.4 lb/in Resilience Using a Rebound Pendulum 7.8% (ASTM D
1054-91)
[0028] FIG. 2 shows a picture of a knee pad made of Akton.RTM.
polymer, which shows the highly flexible feature of the knee pad.
As illustrated in FIG. 3, the flat single piece knee pad can be
wrapped into any shape to completely fit the knee joint. Because of
its thinness and flexibility, the knee pads can be directly worn in
a pair tights, with contact to the skin, or placed between two
pairs of tights commonly worn by the figure skaters. Importantly,
the knee pad of the present invention does not require the use of
straps, elastic tubes, other commonly used elastic attachment
devices, or a pocket further supported by a specially designed
garment. It has been found that the knee pads worn in a pair of
tights stay in position even with a high degree of body movements
during figure skating. Moreover, because of the malleability of the
knee pad, it does not impose pressures or restrictions to the
knees. In general, the knee pad of the present invention can be
worn in a body tight garment without additional attachment devices.
The body tight garment includes, but not limited to, leotards,
tights, leggings, and tight pants.
[0029] Above descriptions are exemplified with figure skaters,
however, the utilities and advantages of the knee pad of the
present invention to all types of skaters, or people engaged in
other sports that also wear tight garments, are apparent. A
suitable example of such is bicycle riders who wear body tight
garments.
[0030] On the other hand, although the knee pad of the present
invention does not require additional attachment device to maintain
its position under a body tight garment, the knee pad can also be
used in conjunction with additional attachment devices. Suitable
examples include elastic tubes and pockets with attachment devices.
Therefore, as an alternative mode, with additional attachment
devices the knee pad of the present invention can also be worn in a
manner similar to a conventional knee pad. In this manner, the knee
pad of the present invention has a broader scope of utilities. For
many sport activities, athletics do not wear body tight garment,
but they can still wear the instant knee pad with additional
attachment devices. Furthermore, in this manner the knee pad of the
present invention can be even thicker, for example, with one half
inch of thickness. Importantly, the instant knee pad's thinness,
flexibility and its configuration are advantageous for providing
knee protection for people involved in various sports.
Additionally, it has been found that in conjunction with attachment
device the knee pad of the present invention can also be used
alternatively as an elbow pad for figure skating and other
sports.
[0031] Additionally, the knee pad of the present invention also has
several other advantages over the existing knee pads. The flat
single piece surface of the knee pad is easy to clean with
disinfectants, and it does not support microbiological growth. The
knee pad does not absorb body fluids or odors, a common problem
with fabric containing knee pads. If the knee pad is scratched,
punctured, or even having small cuts during a fall or accident, it
can easily be repaired by applying an appropriate organic solvent
to the out surface, to clean the vinyl covering, and then applying
readily available patch material.
[0032] Additionally, the surface of the knee pad can be coated with
additional materials to further enhance positional stability, which
can be beneficial in the situations when the skaters experience
with extremely volatile movements. For instance, a thin layer of
suitable material with a slightly course surface can be coated on
the surface of the knee pad. Further, the surface texture of the
knee pad can also be designed to increase surface contact areas, or
surface friction with body tight garments. Moreover, a thin layer
of adhesive material can also be applied.
[0033] In a further embodiment, the present invention provides a
multifunctional body protection pad for providing fall protection
of a knee and a hip. The knee pad of the present invention
described previously can also be used as a hip pad by inserting the
pad in a body tight garment without additional attachment devices.
For this purpose, the body tight garment has a broader meaning,
which does not require a complete leg portion, for instance, biker
shorts.
[0034] It has been found that the configuration designed for knee
protection is also suitable for hip protection. Therefore, the pad
is multifunctional, and can be used interchangeably as either a
knee pad or a hip at a user's discretion. Apparently, many features
and advantages discussed in regards to the knee pad also apply for
its application as a hip pad, such as flexibility, malleableness,
thinness, use without attachment devices, and ease to clean,
etc.
[0035] FIG. 4 shows a figure skater wearing two pieces of the
multifunctional body protection pad of the present invention, one
over a hip area and one over a knee joint. As shown, the aesthetic
appearance of the figure skater is preserved. Use either for knee
or hip protection, the multifunctional body protection pad achieves
a fine balance between providing a sufficient fall protection and
preserving aesthetic appearance, and natural body function of the
user. From this point of view, the present invention presents a
breakthrough to the fall protection devices for figure skaters.
[0036] As illustrated above, the multifunctional body protection
pad can be used interchangeably for providing knee or hip
protection. If the pad is only used as a hip pad, the thickness of
the pad can be increased for providing further protection depending
on user's body weight.
[0037] While the present invention has been described in detail and
pictorially shown in the accompanying drawings, these should not be
construed as limitations on the scope of the present invention, but
rather as an exemplification of preferred embodiments thereof. It
will be apparent, however, that various modifications and changes
can be made within the spirit and the scope of this invention as
described in the above specification and defined in the appended
claims and their legal equivalents.
* * * * *