U.S. patent number 3,642,011 [Application Number 05/086,253] was granted by the patent office on 1972-02-15 for dental floss holder.
Invention is credited to Glenn H. Thompson.
United States Patent |
3,642,011 |
Thompson |
February 15, 1972 |
DENTAL FLOSS HOLDER
Abstract
A Y-shaped dental floss holder in which the arms of the Y are
flexible enough so that they can be squeezed toward each other in
such a manner that a length of dental floss extending through two
holes in the tips of the arms and secured to the bottom of the Y
will have tension exerted on it when the pressure on the arms is
released. The dental floss is strung so that it passes around the
edges of the ends of the arms in substantially coplanar
relationship with one surface of the Y, then through the holes from
the respective outside surfaces of the arm tips and down the inside
surfaces of the arms to a position on the base where it is held
securely.
Inventors: |
Thompson; Glenn H. (Amherst,
OH) |
Family
ID: |
22197291 |
Appl.
No.: |
05/086,253 |
Filed: |
November 2, 1970 |
Current U.S.
Class: |
132/323 |
Current CPC
Class: |
A61C
15/046 (20130101) |
Current International
Class: |
A61C
15/04 (20060101); A61C 15/00 (20060101); A61c
015/00 () |
Field of
Search: |
;132/91,92 |
References Cited
[Referenced By]
U.S. Patent Documents
Primary Examiner: Mancene; Louis G.
Assistant Examiner: McNeill; Gregory E.
Claims
What is claimed is:
1. A Y-shaped dental floss holder comprising:
an elongated base member which is slotted at one extremity thereof
for releasably securing dental floss;
a pair of apertured unidirectionally flexible tines, continuous
with the base, remote from said one extremity, to form a Y-shaped
member wherein said apertures are situated at the tip of each tine
remote from the bight of the tines and pass through the tines in a
direction coplanar with the Y-shaped member, said undirectional
flexibility being in a plane defined by said tines so that the
angle formed by the tines decreases responsive to pinching pressure
on the outer surface of the tines and when said pressure is
released, the tine flexibility supplies tension on a length of
dental floss passing on the outer edge of the tine substantially
coplanar with the surface of the Y, through the apertures, thence
along the inner facing sides of the tines and then through the base
slot wherein the floss is frictionally secured.
2. The dental floss holder of claim 1 which further comprises a
notch at one extremity of the base to guide the floss into the base
slot.
3. The method of stringing a dental floss holder comprising an
elongated base member which is slotted at one extremity thereof for
releasably securing dental floss;
a pair of apertured unidirectionally flexible tines, continuous
with the base, remote from said one extremity, to form a Y-shaped
member wherein said apertures are situated at the tip of each tine
remote from the bight of the tines and pass through the tines in a
direction coplanar with the Y-shaped member, said unidirectional
flexibility being in a plane defined by said tines so that the
angle formed by the tines decreases responsive to pinching pressure
on the outer surface of the tines and when said pressure is
released, the tine flexibility supplies tension on a length of
dental floss passing on the outer edge of the tine substantially
coplanar with the surface of the Y, through the apertures, thence
along the inner facing sides of the tines and then through the base
slot wherein the floss is frictionally secured and comprising:
the procedural combination of steps of grasping the tines along
their outer surfaces;
squeezing the tines so that the angle between them is reduced;
stringing dental floss from the outside of each aperture to the
inside of each aperture;
pulling the ends of the floss taut;
inserting the ends of the floss through the base slot, and
releasing the squeezing pressure on the tines.
4. The method of claim 3 further comprising the step of wrapping
the ends of the floss around the base and again inserting the ends
of the floss in the base slot so that when the tines are released
tension is placed on the portion of floss which constitutes the
base of an isosceles triangle which is formed by the tooth-engaging
floss and the two arms of the holder.
5. The method of stringing a dental floss holder comprising:
an elongated base member which is slotted at one extremity thereof
for releasably securing dental floss;
a pair of apertured unidirectionally flexible tines, continuous
with the base, remote from said one extremity, to form a Y-shaped
member wherein said apertures are situated at the tip of each tine
remote from the bight of the tines and pass through the tines in a
direction coplanar with the Y-shaped member, said unidirectional
flexibility being in a plane defined by said tines so that the
angle formed by the tines decreases responsive to pinching pressure
on the outer surface of the tines and when said pressure is
released, the tine flexibility supplies tension on a length of
dental floss passing on the outer edge of the tine substantially
coplanar with the surface of the Y, through the apertures, thence
along the inner facing sides of the tines and then through the base
slot wherein the floss is frictionally secured and comprising:
the procedural combination of steps of grasping the tines along
their outer surfaces;
squeezing the tines so that the angle between them is reduced;
stringing dental floss from the outside to the inside of one
aperture and then from the inside to the outside of the other
apertures;
tensioning the floss;
inserting the ends of the floss through the slot in the base;
and
releasing the squeezing pressure on the tines.
Description
BACKGROUND OF THE INVENTION
1. Field of the Invention
This invention pertains to that field of art which involves
tooth-cleaning devices and more particularly devices which hold a
strand of material which is to be inserted between the teeth for
removing particles which generally cannot be dislodged by normal
brushing.
2. Description of the Prior Art
In the prior art, dental floss holders have generally been rigid
slotted Y-shaped members. The slots of the prior art were
unsatisfactory in that the dental floss was hard to properly locate
in the slots and once the dental floss was properly engaged, it had
a tendency to slip out of the slots. Previous dental floss holders
were strung in such a way that the floss which was not being used
often interfered with the operation of the instrument because of
its placement on one of the nonopposing surfaces of the arms of the
Y. Also, in the prior art, the free ends of the floss were often
secured on protrusions which interfered with the operation of the
device and which were discomforting to the user. Often the general
cross-sectional area of the prior holders has been angled so as to
cause additional discomfort. The tensioning of the floss across the
top of the Y was often a haphazard proposition and if the floss or
cleaning member ever became lodged between the teeth, it was often
difficult to disengage. Also, the tooth engaging portion of floss
was often prevented from being presented cleanly or completely to
the teeth because the tines of the holder would strike portions of
the inside of the mouth and prevent the full insertion of the floss
between the teeth.
BRIEF SUMMARY OF THE INVENTION
Among the objects of this invention is the provision of a dental
floss holder that is generally Y-shaped and of a rounded
cross-sectional configuration. It is also an object of the present
invention to provide a dental floss holder with arms that are
resiliently opposed to each other and to provide a dental floss
holder in which the notches of the prior art in the ends of the
tines are replaced by holes through which a length of dental floss
may easily be passed. Moreover, the present invention provides a
dental floss stringing arrangement whereby the floss which is not
being used lies on the inside facing surfaces of the arms then down
to the end of the base of the Y remote from the bight of the tines
and is secured there. The arms are of sufficient length that the
view of the floss engaging the teeth when the instrument is being
used is not obstructed and the member itself can be grasped at the
juncture of the tines and the base thus enabling the implement to
be controlled more satisfactorily. In the present invention, the
arms of the Y are resiliently opposed so that they may exert
pressure on the length of dental floss passing through the holes in
the ends of the arms but additionally such arms are rigid in the
direction that pressure is applied to the instrument in cleaning
the teeth. The tine resiliency substantially prevents the gums from
becoming cut when the device is used because the arms will flex
when any substantial resistance is encountered.
These and other objects of the present invention are accomplished
by providing a Y-shaped dental floss holder having resilient arms
and apertures in the ends thereof with a frictional floss-engaging
slot at the base thereof and a piece of dental floss which is
strung across the ends of the tines in the area of the eyes in
substantially coplanar relationship with one surface of the
Y-shaped member and in through the holes at the ends of the
respective arms from the outside and then along the inside of the
arms to the base of the Y and into the slot for frictional
engagement therein. The tines are normally at rest at a fixed
angle, which angle is decreased by pressing on the outside of
either arm to decrease the distance between the ends of the arms
when the floss is being strung. After the floss has been strung
through the eyes as hereinbefore described and inserted into the
frictional holding slot at the base of the Y, the arms are
prevented from returning to their normal position by the length of
dental floss going through the device but the spring like action of
the arms exerts tension on the floss so that the device may be
effectively operated.
DESCRIPTION OF THE INVENTION
A more complete description of the preferred embodiment of this
invention will now be made with reference to the accompanying
drawings, in which:
FIG. 1 is a view of the invention ready for use in cleaning the
teeth;
FIG. 2 is a plan view of the dental floss holder;
FIG. 3 is a side view, and;
FIG. 4 is a plan view of the holder after it has been strung with
dental floss.
In FIG. 1, the invention, indicated generally by the numeral 10, is
shown being held ready for use.
It can be seen in FIG. 1 that the dental floss 14 has been strung
about the outsides of the tines 16 and 18 thence through the
apertures 20 and 22 and then down along the inner facing surfaces
24 and 26 of the holder 10.
One of the methods by which this stringing arrangement may be
accomplished is shown in FIG. 2. As can be seen in said FIG. 2, the
broken line indicates the direction in which the floss is inserted
in apertures 20 and 22. As can be seen in FIG. 4 after the floss is
inserted from the outside to the inside of the apertures, it is
strung down along the inside of the tines and then along the
outside of the handle 28 and then through the frictional securing
slot 30. It will also be readily appreciated that it is not
absolutely necessary for the slot 30 to secure the floss tautly on
the first pass through since the ends of the floss 32 can be
wrapped about the lower portion 34 of handle 28 and thence back
through slot 30 to thereby firmly secure the floss in operable
position to the holder. Alternatively, pressure can be applied to
the floss by the thumb as shown in FIG. 1 although it is the intent
of this invention that the floss be generally secured by the
slot.
As is seen in FIGS. 2 and 4, the portion of the holder that defines
the slot 30 has been beveled at 36 to permit easy insertion of the
floss.
The arms or tines or forks of the holder are also flexible so that
pressure exerted on the outside surfaces 38 thereof will cause them
to move toward each other so that when floss is strung as shown in
FIG. 4 and the pressure is released against the floss, the floss
will become taut.
One of the more important features of this invention involves the
placement of the operable section of the dental floss around the
outside of the tines. This is done so that the floss may be the
first element of the holder-floss combination to contact the teeth
or the gums. Thus, that section of the holder comprising the area
between the apertures in the ends of the tines and the outside
surfaces of the tines which is generally indicated as 40 in FIG. 3
will not interfere with the operation of the dental floss. It can
also be seen that by virtue of the arrangement of the floss in the
holder the tips of the tines indicated as 42 in FIG. 4 will also
not interfere with the floss tooth contact since the instrument
must be used in such a manner that the angle of approach of the
holder to the teeth by virtue of the placement of the floss is such
that contact will first be made by the floss.
It is also seen that by virtue of the fact that the apertures 22
and 20 are holes as opposed to notches that once the device is
strung there is no possibility that the floss will become
disengaged from the holder while it is in use and additionally,
stringing of the holder is made easier.
It is also seen that the utilization of the notch or slot 30 makes
possible quick and easy disengagement of the floss from its tautly
secured position in the holder so that in the event the floss
becomes engaged between the teeth while the instrument is in
operation the floss can be disengaged for easy removal of the
holder itself and subsequent manipulation of the floss to disengage
it from the teeth or gums. It can also be seen by examining the end
portion of the tines in the area of the apertures which are
indicated generally as 44 in FIG. 4 that they are of such dimension
that the string must necessarily lie closer to the teeth when the
instrument is in operation than any portion of the holder. This is
accomplished by making the vertical direction 46 no greater than
the horizontal direction 48 as shown in FIG. 2, each measurement
taken from the center of the aperture. It can be seen, however,
that these dimensions can be varied somewhat but as the vertical
direction 46 approaches a distance equal to or greater than the
horizontal direction 48, the angle of attack which may be used by
the operator of the device is lessened. It can also be seen that as
the operable portion of the floss is adjusted around the end of the
tine in the direction of the arrow 50 in FIG. 1 that the angle of
attack would also be increased; however, the floss would have a
tendency to slip along the circumference of the ends of the tines
which would necessarily loosen the tension on the floss which is
undesirable.
It is seen that by virtue of the stringing arrangement shown in
FIGS. 1 and 4, the path followed by the floss is the shortest
distance around the ends of the tines. Any movement around the
circumference 52 necessarily lengthens the distance the floss must
traverse before it enters apertures 20 and 22, thereby making
slippage of the floss possible during use, such slippage resulting
in lessening the tension across the floss and thereby reducing the
efficiency of the instrument.
It is also seen that the tines of the holder are made sufficiently
long in relation to the hand of the normal operator that the view
of teeth is not obstructed. It is also seen that by virtue of the
smooth lines of the holder it can be grasped near the fork 54
thereby insuring better control over the holder when it is in
use.
The distance between the tines 56 as shown in FIG. 2 is
sufficiently large to enable the arms to lie on either side of the
teeth being cleaned.
The invention is also constructed so that the arms are rigid in the
direction in which the pressure is being applied but, as pointed
out heretofore, are flexible in the plane of the Y. This flexible,
rigid characteristic allows not only for tensioning of the string
but also allows for substantial rigidity when pressure is applied
to the teeth in a plane which is generally perpendicular to the
perpendicular axis of the Y. Moreover, it additionally allows for
flexibility and enables the holder to give when the floss strikes
the gums so as to lessen the chance that the gums will be
injured.
It can also be seen that since the floss lies flat against the
insides of the arms it does not interfere with the operation of the
instrument. It is also seen that the tension of the string is
easily changed by virtue of the fact that in general usage the ends
of the floss 32 are merely placed in the frictional engaging slot
30 and may be easily removed.
The invention has been described in great detail sufficient to
enable one of ordinary skill in the art to make and use the same.
Obviously, modifications and alterations of the preferred
embodiment will occur upon a reading and understanding of the
specification and it is my intention to include all such
modifications and alterations as part of my invention insofar as
they come within the scope of the appended claims.
* * * * *