U.S. patent application number 11/756394 was filed with the patent office on 2008-12-04 for disposable corn and callus remover tool.
Invention is credited to Chung Quoc Nguyen, Phong H. Nguyen.
Application Number | 20080295855 11/756394 |
Document ID | / |
Family ID | 40086769 |
Filed Date | 2008-12-04 |
United States Patent
Application |
20080295855 |
Kind Code |
A1 |
Nguyen; Phong H. ; et
al. |
December 4, 2008 |
Disposable Corn and Callus Remover Tool
Abstract
A disposable corn and callus remover tool with a holder for
receiving an abrasive block. The holder forms a handle for
comfortably holding the tool and includes a receptacle to removably
receive an abrasive block. The abrasive block may be formed of
pumice or a buffing block comprising one or more abrasive layers
attached to a compressible layer. The compressible layer is made of
foam or hard sponge. The abrasive block is secured to the holder in
such a way that both top and bottom abrasive layers are exposed for
efficient use.
Inventors: |
Nguyen; Phong H.; (San
Gabriel, CA) ; Nguyen; Chung Quoc; (Westminster,
CA) |
Correspondence
Address: |
Klein, O''Neill & Singh
43 Corporate Park, Suite 204
Irvine
CA
92606
US
|
Family ID: |
40086769 |
Appl. No.: |
11/756394 |
Filed: |
May 31, 2007 |
Current U.S.
Class: |
132/76.4 |
Current CPC
Class: |
A61B 17/54 20130101;
A61B 2017/320004 20130101 |
Class at
Publication: |
132/76.4 |
International
Class: |
A45D 29/00 20060101
A45D029/00 |
Claims
1. A corn and callus remover tool comprising; a holder having a
receptacle, and an abrasive block removably received in said
receptacle.
2. The corn and callus remover tool of claim 1, wherein said holder
is made of a light weight but rigid material.
3. The corn and callus remover tool of claim 2, wherein the light
weight but rigid material comprise plastic, ceramic, graphite or
other composite, and metal or metal alloy.
4. The corn and callus remover tool of claim 2, wherein said
receptacle is attached to an ergonomic handle.
5. The corn and callus remover tool of claim 2, wherein said holder
includes a receptacle for removably attaching an abrasive
block.
6. The corn and callus remover tool of claim 2, wherein said
receptacle contains at least one hinge, at least one spike, and at
least one securing mechanism.
7. A corn and callus remover tool comprising; a holder having a
receptacle, and an abrasive block removably received in the
receptacle comprising one compressible layer and two abrasive
layer(s), said compressible layer being formed from a foam or
sponge and said abrasive layer comprising abrasive grit.
8. The corn and callus remover tool of claim 7, wherein said
abrasive block is removebly attached to the holder.
9. The corn and callus remover tool of claim 7, wherein said
abrasive grit is selected from an abrasive group comprising
diamonds, synthetic diamonds, silicon carbide, and aluminum
oxide.
10. The corn and callus remover tool of claim 7, wherein said
abrasive grit is sprayed onto said compressible layer.
11. The corn and callus remover tool of claim 7, wherein, said
compressible layer is thicker than said abrasive layer.
12. The corn and callus remover tool of claim 7, wherein the top
and bottom surfaces of the abrasive block are exposed when the
abrasive block is removably received in the receptacle.
13. A corn and callus remover tool having a holder with a
receptacle and a handle comprising; an abrasive block adapted to be
removably received in the receptacle of the holder.
14. The corn and callus remover tool of claim 13, wherein said
abrasive block has a length in the range of 55 mm to 65 mm and
width in the range of 35 mm to 45 mm.
15. The corn and callus remover tool of claim 13, wherein said
abrasive block is a natural pumice stone.
16. The corn and callus remover tool of claim 13, wherein said
abrasive block is an artificial pumice stone.
17. The corn and callus remover tool of claim 13, wherein said
abrasive block is a buffing block.
Description
FIELD OF THE INVENTION
[0001] This invention generally relates to manicure and pedicure
products, and in particular to a disposable corn and callus remover
tool for use on hands and feet.
BACKGROUND OF THE INVENTION
[0002] The cosmetic industry enjoyed unparalleled growth in recent
years fueled by rising salaries and reduced leisure time. Nail
salons are positively booming as people with more disposable
income, find less and less time to take care of their beauty needs.
Fortunately, they have utilized a part of their newfound wealth to
patronize nail salons with greater frequency. A typical nail salon
customer may visit their favorite salon every week for complete
manicures and pedicures.
[0003] During a typical salon appointment, a beautician will smooth
rough patches of skin such as corns and calluses on a client's
hands and feet. Corns and calluses normally grow in places where
the skin rubs against clothing or is under constant pressure and
heavy usage. Normally this occurs at the heels and balls of the
feet and the base and ends of the fingers. Corns and calluses are
the result of the body attempting to protect itself from abrasion
damage by building additional layers of skin over the affected
areas.
[0004] In most cases, corns and calluses are not a health issue;
however the thick layers of dead skin do reduce sensitivity and
feel rough to the touch. Furthermore, calluses and corns may look
unsightly. This effect is especially pronounced on darker skinned
individuals, because there is less pigmentation in corns and
calluses. More severe cases of corns and calluses may result in
pain and inflammation. In severe cases, the skin hardens and cracks
in the affected area leading to secondary infections. In such
situations, medical advice should be sought before attempting
self-treatment.
[0005] For non serious cases of corns and calluses, treatment
usually involves softening the skin by soaking the affected area.
Once dried the corn or callus is gently abraded with an abrasive
and then a topical moisturizer is applied to the affected area. The
abrasives most commonly employed are pumice stones and sand paper.
Natural pumice stones are the result of volcanic activity. The
intense heat and pressure causes lava to froth when ejected into
the air. The gasses trapped in the lava create vesicles and as the
lava cools, the vesicles solidify becoming pores in the stone.
Artificial "pumice stones" are typically made of hard foam. Like
the natural version, the foam is highly porous and lightweight. The
sharp edges of the vesicles in both natural and artificial pumice
stones create an abrasive surface suitable for rubbing off layers
of skin.
[0006] As with any industry that affects the general public,
certain standards are required to keep the public safe. Title 16
Division 9 .sctn.981(a) of the California Code of Regulations Board
of Barbering and Cosmetology require that: [0007] a) All
instruments and supplies which come into direct contact with a
patron and cannot be disinfected (for example, cotton pads,
sponges, emery boards, and neck strips) shall be disposed of in a
waste receptacle immediately after use. Sanitation requirements
like these prevent the spread of communicable diseases such as
warts, fungus, ring worms, and other skin afflictions spread by
contact. As one can imagine, due to the sheer volume of customers
patronizing a nail salon, even one contaminated tool can infect
dozens of customers.
[0008] One solution is to disinfect all surfaces which contact
clients, with alcohol or similar disinfectants. The problem with
this solution is that buffing blocks are made of a sponge or foam
core. The foam or sponge would obviously soak up any solution
rendering the buffing block useless. Also the abrasive outer layer
cannot be cleaned with solutions because the sand paper may
dissolve. The same results occur when cardboard emery boards are
placed in solution.
[0009] A potential problem of using disinfectants on pumice stones
is that the very structure of the pumice stones makes cleaning them
extremely difficult. The pores in a pumice stone trap dead skin.
Merely submerging the pumice stone in a disinfectant will remove
the dead skin packed into the outer pores of the pumice stone. Most
customers would be disturbed at the thought of another person's
detritus touching them regardless of how antiseptic that skin may
be.
[0010] Thus the simple solution is to discard the used buffing
block after each client. As with most regulations, there is a cost
of compliance. Buffing blocks cost approximately $2.00 each. Pumice
stones are slightly less expensive at $1.00 each. A typical salon
session may use several different types of buffing blocks or pumice
stones to remove corns and calluses. Beginning with the more
abrasive variety and ending with a finer grit to smooth the more
delicate skin underneath. A typical pedicure costs about $10.00. If
even three buffing blocks are used, 3/5ths of revenue is used up.
Furthermore this cost cannot be passed through to the client,
because at some point, the convenience of a professional pedicure
will be outweighed by the price.
[0011] Reducing the size of the buffing block would reduce the cost
of manufacture. However, this is also not a perfect solution
because the smaller the buffing block the harder it is to hold. In
a typical day, the average nail care professional sees as many as
twenty clients. After extended use, the practitioner's hands would
cramp, leading to pain and fatigue.
[0012] The implement currently in use at nail salons and in
cosmetic stores resemble a hair brush. A pumice stone is usually
glued to a flat plastic backing forming the "brush" part of the
implement. The backside of the "brush" may be a piece of sandpaper
providing an additional abrasive surface. As the pumice stone is
attached to a handle, a smaller stone will not cause hand cramp and
fatigue. The pumice stone may be flatter and smaller yet remain
effective. However, even though some cost is saved through the use
of a smaller stone, the overall objective is unmet because the
entire implement still must be disposed of after each customer. The
pumice stone is permanently attached to the handle, and thus a
perfectly reusable handle must also be discarded as required by
law.
[0013] Another implement currently available for pedicures is the
metal file. Unlike traditional metal files, the type used on corns
and calluses resemble a cheese grater. Needless to say customers
would likely object to the application of such an object to their
feet. Also, the trimming of corns and calluses using a razor is not
recommended by healthcare practitioners and likely banned by law in
most states.
[0014] It is thus apparent that the need exists for a corn and
callus remover tool that is easy to use, cost effective to
manufacture, and complies with sanitary regulations. Such a tool
would necessarily be disposable yet less expensive than the current
art.
SUMMARY OF THE INVENTION
[0015] An aspect of the invention relates to a disposable corn and
callus remover tool having two distinct components. An abrasive
block and a holder for an abrasive block. In one embodiment the
abrasive block can be formed using a pumice stone, buffing block,
sand paper, etc. In this embodiment the abrasive block can be
disposable.
[0016] The holder for the abrasive block may be made of a light
weight but strong material such as plastic, ceramic, graphite or
other composite, and metal or metal alloy. Part of the body of the
holder forms a palm sized handle. The handle may also be
ergonomically shaped for comfort. Examples of such ergonomic design
may include rounded edges, a flatter wider body where the handle
fits into the palm, and a thicker but narrower "neck" where the
handle meets the abrasive block receptacle.
[0017] The handle is attached to a receptacle for an abrasive
block. In the exemplary embodiment the receptacle is one piece with
the handle. The exemplary receptacle is a four sided frame, hinged
at the top (end distal the handle). The hinge allows one half of
the frame to open outwards. This movable section of the frame has a
securing mechanism at the end proximal to the handle. This securing
mechanism is a tab and slot catch in the exemplary embodiment, but
may be any securing mechanism which can removably secure the
movable section to the stationary section of the frame.
[0018] In the exemplary embodiment, the receptacle also has spikes
on the inside edge of two sides of the frame. The spikes are on
opposing frame sides and are aligned perpendicular to the inside
surface of the frame. The spikes attached to the stationary section
of the frame are equal sized. In contrast, the spikes attached to
the movable part of the frame increase in size the further away
from the hinge they are placed. The spike furthest from the hinge
being equal in size to the spikes on the stationary part of the
frame. The spikes are placed on the inside of the frame so that in
the closed position, i.e. when the movable section is secured to
the stationary section of the frame, the spikes are embedded in the
abrasive block. The spikes help to hold the abrasive block securely
within the frame of the receptacle.
[0019] As mentioned above, the spikes on the moveable part of the
frame of the exemplary receptacle are different sizes. One of the
reasons for using different size spikes with the smallest being
nearer to the hinge is to allow the spikes to drive into the
abrasive block at a roughly 90.degree. angle to the abrasive block.
A larger spike near the hinge would drive into the abrasive block
at an acute angle widening to a 90.degree. angle as the movable
section of the frame swings into a closed position. Such an entry
would cause a hole wider than the spike and result in a less secure
hold on the abrasive block.
[0020] The abrasive block receptacle has been described as a frame
with a hinged section which opens to allow the removal and
replacement of an abrasive block. One of the advantages conferred
by this arrangement is replacing the abrasive block can be done
quickly and easily. Another advantage is the spikes can hold a
variety of abrasive blocks including buffing blocks made of hard
foam or sponge as well as conventional pumice stones. So long as
the spikes are capable of impaling the abrasive blocks the
invention should work as intended. An advantage of using a frame to
hold the abrasive block is that top and bottom of the abrasive
block are exposed. The width of the frame is generally smaller than
the width of the abrasive block exposing most of the surface area
of the abrasive block.
[0021] One of the novel traits of the invention is the size of the
abrasive block used. In the exemplary embodiment the abrasive block
is substantially smaller, and therefore less costly to make, than
prior art. The exemplary abrasive block is between 55-65 mm in
length and 35-45 mm in width. As mentioned previously, a small
abrasive block is hard to hold and over time may cause pain to the
user. To overcome this problem, while retaining a cost effective
size, the abrasive block is removably attached to or removably
placed into a receptacle attached to a handle, such that the
buffing block can generally be easily removed from the receptacle
or easily attached to the receptacle.
[0022] An exemplary abrasive block is made of a compressible layer
such as foam, hard sponge or other material which is compressible
under pressure but retains its original shape once pressure is
relieved. The compressible layer slightly deforms when the abrasive
block is applied to the corn or callus. This compressible layer
acts as a cushion, evenly distributing pressure around the entire
corn or callus giving a more even abrading. The compressible layer
is attached to an abrasive layer. The abrasive layer may comprise
one or more of the following; silicon carbide, aluminum oxide,
diamond dust, metallic filing, etc. In the exemplary embodiment the
abrasive material is sprayed directly onto the compressible layer
during manufacture, but any method of adhering the abrasive layer
onto the compressible layer would suffice. Such methods may include
embedding the abrasive material onto a paper layer and sticking the
paper layer onto the foam layer. Generally the compressible layer
is thicker than the abrasive layer(s). A thicker abrasive layer is
usually more expensive to manufacture and seems unnecessary because
the abrasive layer does not usually wear through with normal
use.
[0023] As the title of the invention suggests, the exemplary
embodiment is disposable. Specifically the abrasive block part of
the invention may be disposed of after each client. The holder part
of the invention may be retained for the next customer. Simply
disinfect the holder and pop a new abrasive block into place.
Disposing the abrasive block is an effective way of complying with
sanitary regulations. Using a new abrasive block for each customer
should reduce the risk of spreading a contagious skin disease. An
additional benefit is less use of Barbersol or similar
disinfectants, which emit hazardous fumes into the workplace.
[0024] The invention presents an elegant solution to the
aforementioned problems. One objective met by this invention is
providing a callus and corn remover that is comfortable to hold and
use for smoothing rough skin.
[0025] Another objective met by this invention is complying with
various safety and sanitation codes requiring the disposal of
abrasive blocks and pumice stones after each customer. Each
abrasive block is removable from the receptacle and a replacement
easily installed.
[0026] Still another objective met by this invention is reducing
the cost of manufacturing the corn and callus remover. The
exemplary abrasive block is significantly smaller than those in
commercial use. Furthermore, because the receptacle is a frame,
both sides of an abrasive block may be used before disposal. In the
current art only one side of a pumice stone may be used, because
the opposite side is glued onto a handle.
BRIEF DESCRIPTION OF THE DRAWINGS
[0027] FIG. 1 is a perspective view of an exemplary embodiment of
the invention.
[0028] FIG. 2 is an overhead view of an exemplary embodiment of the
invention.
[0029] FIG. 3 is another perspective view of an exemplary
embodiment of the invention.
[0030] FIG. 4 is a perspective view of an exemplary embodiment of
the invention with an exemplary abrasive block attached.
[0031] FIG. 5 is a view of the top of an exemplary embodiment of
the invention showing the hinge.
[0032] FIG. 6 is a perspective view of an exemplary abrasive
block.
[0033] FIG. 7 is a side view of an exemplary embodiment of the
invention with an abrasive block attached.
DETAILED DESCRIPTION OF THE DRAWINGS
[0034] FIG. 1 is a perspective view of an exemplary embodiment of
the invention 100 shown in the "open" position and without an
abrasive block attached. The holder 101 may comprise two distinct
yet connected parts; a receptacle and a handle 102. The holder 101
may be constructed of a light weight but strong material such as
plastic, ceramic, graphite or other composite, and metal or metal
alloy. The handle 102 may be rounded at the edges and curved at the
area where the handle 102 joins the receptacle. For the sake of
clarity, this area will henceforth be referred to as the "neck" of
the handle, and the rest of the handle may be referred to as the
"body". Furthermore in the exemplary embodiment, the neck is
slightly thicker than the wider and flatter body of the handle.
Thickening the neck of the handle seems to add extra strength to
the design which may be beneficial in preventing the receptacle
from snapping off the handle. For that and other reasons related to
cost, the receptacle and the handle may be of one-piece
construction for added strength. The pronounced curve on the side
of the neck not only lends the design aesthetic appeal, but also
serves as a place for the salon professional to place a thumb to
guide the device in a side to side motion.
[0035] The receptacle mentioned above holds the abrasive block, not
shown. The receptacle is in essence a frame for holding the
abrasive block stationary while allowing access to both sides of
the abrasive block. The receptacle comprises; a non-moving section
102, a moving section 103, a hinge 104, spikes 105, and a securing
mechanism 106. The non-moving section 102 may be of one-piece
construction with the handle. The entire frame i.e. both moving and
non-moving sections are rounded at the edges to prevent accidental
cuts and nicks during use. The inside edge of the non-moving
section 102 and the moving section 103 are lined with spikes 105.
The moving section 103 is attached to the non-moving section by
hinge 104. Hinge 104 allows the moving section 103 to swing
outwards and away from the handle. In such an "open" configuration,
the receptacle may accept an abrasive block, shown later. Once the
abrasive block is impaled on the spikes, the moving section 103 may
swing back into a "closed" position, forming a four sided frame
once more. A securing mechanism 106 may be engaged to prevent the
moving section from accidentally swinging outwards. In the
exemplary embodiment the securing mechanism 106 is a tab and slot
mechanism. However, any means known to one skilled in the art of
removably securing the moving sections of the frame in a "closed"
position may be substituted.
[0036] FIG. 2 is a bottom view of an exemplary embodiment of the
invention 100. The receptacle is shown in the "closed" position
without an abrasive block attached. The spikes 105 are shown on
opposite sides of the receptacle. In the exemplary embodiment there
are four spikes 105 to each side and they are directly opposite
each other. No claim of preference is made to the number of spikes
or to the positioning of the spikes. In one embodiment the spikes
are used to hold the abrasive block in place. As such it is
probable that three spike on each sides in an offset alignment
would serve the same function of holding the abrasive block
stationary. Similarly more than four spikes would likely serve just
as well.
[0037] The part of the handle distal from the receptacle is pierced
with a round hole 107. The hole may be used to hang the invention
100 during display for retail sale or storage.
[0038] FIG. 3 is a perspective view of the invention 100 depicted
at a slightly flatter angle. Again the invention 100 is in the
"open" configuration and without an abrasive block attached. The
figure illustrates the tab portion of the tab and slot securing
mechanism 106 mentioned previously. Also more clearly illustrated
is the neck portion 108 of the handle which is thicker than the
rest of the handle, as mentioned previously. The thick construction
enhances the aesthetics of the invention and also may serve the
functional purpose of adding strength to the join between handle
and receptacle.
[0039] FIG. 4 is a perspective view of the invention 100 shown with
abrasive block 110 attached. As described previously, the abrasive
block is first impaled on the spikes attached to the non-moving
section of the receptacle. The moving section is then closed and
secured. The spikes embedded in the abrasive block on two sides
securely holds the abrasive block in place. One of the advantages
conferred by this arrangement is replacing the abrasive block can
be done quickly and easily. Another advantage is the spikes can
hold a variety of abrasive blocks including buffing blocks made of
hard foam and conventional pumice stones. So long as the spikes are
capable of impaling the abrasive blocks the invention should be
work as intended. Furthermore the entire surface area of the top
and bottom of the abrasive block is exposed for use by simply
rotating the invention around and using the opposite side.
[0040] FIG. 5 is a view of the top of the invention 100 showing the
hinge 104. As shown in this figure the abrasive block 110 is
thicker than the receptacle. This conveniently places both top and
bottom of the abrasive block outside the boundaries of the
receptacle allowing unimpeded access to the most surface area on
the abrasive block.
[0041] FIG. 6 is a perspective view of an exemplary abrasive block.
This exemplary abrasive block has two abrasive layers 112 attached
to a compressible layer 114. The abrasive layer may comprise one or
more of the following; silicon carbide, aluminum oxide, diamond
dust, metallic filing, etc.
[0042] FIG. 7 is a side view of the invention 100 with abrasive
block 110 attached. Again the relative thickness of the neck
portion 108 adds strength to the join between the receptacle and
handle. The abrasive block 110 is thicker than the other parts of
the invention 100 allowing unimpeded motion of the invention during
use. Because the abrasive block 110 is generally thicker, the
receptacle and handle should not come into contact with the
customer.
* * * * *