U.S. patent number 3,613,698 [Application Number 04/861,438] was granted by the patent office on 1971-10-19 for dental hygiene unit.
Invention is credited to Daniel W. Fox.
United States Patent |
3,613,698 |
Fox |
October 19, 1971 |
DENTAL HYGIENE UNIT
Abstract
An inclusive dental hygiene unit adapted to be carried on one's
person. Within the compact case is a toothbrush and a replaceable
disposable dispenser of paste dentifrice. A sliding action of the
case end deposits a measured amount of the dentifrice upon the
bristles of the toothbrush and simultaneously ejects the upper
portion of the brush into usable position.
Inventors: |
Fox; Daniel W. (Phoenix,
AZ) |
Family
ID: |
25335787 |
Appl.
No.: |
04/861,438 |
Filed: |
September 26, 1969 |
Current U.S.
Class: |
132/311; 401/129;
401/143; 401/176; 401/191; 401/150; 401/157 |
Current CPC
Class: |
A46B
11/0006 (20130101) |
Current International
Class: |
A46B
11/00 (20060101); A45d 044/18 () |
Field of
Search: |
;132/84,84.2,84.4
;206/15.1 ;401/111,107,119,127,138,150,169,176 ;222/191
;15/137,531 |
References Cited
[Referenced By]
U.S. Patent Documents
Primary Examiner: Mancene; Louis G.
Assistant Examiner: McNeill; Gregory E.
Claims
Having fully described and disclosed the invention and the
preferred embodiment thereof in such clear and concise terms as to
enable those skilled in the art to understand and practice the
same, I claim:
1. In combination, an elongated housing defining a longitudinal
toothbrush-receiving chamber opening outwardly of one end of said
housing, a toothbrush disposed lengthwise in and extendable and
retractable relative to one end of said chamber with the bristle
end of said toothbrush disposed for first extension relative to
said chamber, a paste reservoir in said housing including an
outlet, paste delivery means in said housing for conveying paste
from said reservoir to the bristle end of said toothbrush and
including a passage communicated at one end portion with said
outlet and having its other end opening into the open end portion
of said chamber and registered with the first extended end portion
of the bristle end of the toothbrush, paste pump means operatively
associated with said reservoir and passage for pumping paste from
the reservoir through said passage, said pump means including a
single-action piston-type actuator reciprocal longitudinally of
said housing and movable in one direction during its priming stroke
and in the opposite direction during its pumping stroke, said
passage outlet end and said bristle end of said toothbrush being
supported for relative displacement longitudinally of said housing
during movement of said actuator through its pumping stroke with
one of said passage outlet and bristle ends supported in stationary
position relative to said housing and the other of said ends
movable along said housing with said actuator, whereby as paste is
discharged from the outlet end of said passage the discharged paste
will be spread along said bristle end of the toothbrush.
2. In combination, an elongated housing having front and rear ends
and including side-by-side longitudinal first and second cavities,
the front end of said second cavity terminating a spaced distance
from the front end of said housing and the front end of the first
cavity including a lateral extension disposed in front of the front
end of the second cavity and opening forwardly through the front
end of said housing, said second cavity defining a paste reservoir
and having a paste outlet in the front end thereof, a toothbrush
including handle and bristle ends disposed in said first cavity and
extendable and retractable relative to said front end of said
housing with said bristle end projecting into said extension when
said brush is retracted relative to said front end of said housing,
and paste-conveying means including a reciprocal pump portion
operative to pump paste from said reservoir to a discharge point
opening into the foreward end of said extension at the side thereof
remote from the first cavity side of said housing.
3. The combination of claim 2 wherein said conveying means includes
passage means for conveying paste from said reservoir to said
discharge point.
4. The combination of claim 3 wherein said housing defines a
pressure chamber disposed forward of said first cavity and between
the latter and said extension, said paste outlet opening into said
chamber and having first one-way check valve means operatively
associated therewith, a pumping chamber communicated with said
pressure chamber, a reciprocal piston member slidable over said
pumping chamber, the inlet end of said passage means opening into
said pressure chamber and second one-way check valve means
operatively associated with said passage means operable to prevent
reverse flow of the paste therethrough into said pressure
chamber.
5. The combination of claim 4 wherein said reciprocal piston member
is reciprocal longitudinally of said housing, an actuator for said
piston member including portions thereof disposed exteriorly of
said housing and mounted for reciprocation along the latter and
connected to the piston member, said toothbrush handle end and said
actuator including coacting means operable to at least initially
project the toothbrush from the front end of said housing during
forward movement of the actuator relative to the housing, the
piston member and actuator being movable rearwardly along the
housing during the priming stroke of said piston member and
forwardly along said housing during the pumping stroke of said
piston member whereby paste will be discharged from the outlet end
of said passage means at said discharge point as said toothbrush is
initially projected from said front end of said housing.
6. The combination of claim 5 wherein said toothbrush and housing
include coacting means operable to yieldingly retain said
toothbrush against full extension from said front end of said
housing.
Description
BACKGROUND OF THE INVENTION
The present invention relates to the art and science of
dentistry.
More particularly, the invention concerns a device to facilitate
proper dental hygiene.
In a further aspect, the invention concerns a personal dental
hygiene unit adapted to be carried upon one's person.
The enlightened society, in response to the frequent remonstrations
of the dental association, are extremely conscious of the
importance of proper dental hygiene. Acceptable practice dictates
that a person brushes his teeth after each meal. This requires that
he carry the necessary implements and supplies on abbreviated or
extended journeys and during his daily sojourns into the work,
business, or social community.
Generally, extended journeys pose little problem as the toothbrush
and container of dentifrice may be packed with other personal
items. Nevertheless, they are not usually within convenient access
during the trip and there is always the possibility of dentifrice
leakage, as from a ruptured toothpaste tube, to besmear and taint
adjacent personal effects and clothing. During a person's daily
routine, it is extremely inconvenient, if not impossible, to carry
a toothbrush and container of dentifrice on his person. Carrying
space within one's clothing is limited and, of course, there is
always the possibility of rupturing a toothpaste tube within the
pocket.
Prior art devices have been proposed to alleviate the foregoing
difficulties and provide portability to the dental hygiene package.
One such device offers a case in which to house a folding
toothbrush and tube of toothpaste. While supplying the necessities,
this device demands the brush and dentifrice be separate and in an
ungainly container not conducive to pocket storage. Other prior art
devices known as "fountain type brushes" are extremely compact and
store the dentifrice within the handle of the toothbrush. However,
there is an inherent limitation on the type of dentifrice
compatible with the system design, and during use the dentifrice is
delivered to the base of the bristles where it is sufficiently
ineffectual to question the effectiveness of the brushing
process.
Consequently, due to the inconvenience and deficiencies of present
portable dental hygiene devices, "brushing after each meal" remains
as only an admonition of the dental association except for those at
home during mealtime.
It would be highly advantageous, therefore, to provide a
conveniently stowable and usable unit for effective dental
hygiene.
SUMMARY OF THE INVENTION
Accordingly, it is a primary object of the present invention to
provide a personal dental hygiene unit.
Another object of the present invention is to provide a compact
portable dental hygiene unit adapted to be carried on one's
person.
A further object of the present invention is the provision of a
dental hygiene unit having a self-contained dentifrice which is
automatically dispensed in a measured amount into proper position
upon the bristles of the toothbrush prior to use.
Yet a further object of the present invention is the provision of a
dental hygiene unit of the above type in which the depleted supply
of dentifrice may be quickly and conveniently replenished.
Yet a still further object of the present invention is to provide a
dental hygiene unit of the above type having esthetic value,
practicality, and yet be relatively inexpensive to manufacture.
In order to accomplish the desired objectives of my present
invention, in accordance with a preferred embodiment thereof, I
first provide a generally rectangular elongate housing or case,
having a frontal end opening and a rearward end opening. A first
longitudinal cavity extends between the frontal opening and the
rearward opening proximate one side of the case with an upwardly
directed enlargement near the frontal end thereof. A second cavity
substantially parallel to the first cavity extends inwardly from
the rearward opening of the case substantially parallel to the
first cavity for a proportionate length of the case. A removable
end cap encompasses the rearward end of the case and is slidable
along a portion thereof.
Next I provide a toothbrush having a stem slidable within the first
cavity and a bristle section containable within the enlargement of
said first cavity. A generally elongate replaceable dentifrice
container, of the disposable type, having a frontal end and a
rearward end and a longitudinal central conduit extending
therebetween, is housed within the second cavity. The rearward end
of the dentifrice container is sealed by an end plate slidable
within the walls of the container and having a central opening to
permit passage of the conduit. The frontal end of the container is
sealed by a recessed end plate containing a pair of ball check
valves to permit passage of the dentifrice from within into the
recess which is sealingly engaged at its perimeter to the forward
end of the second cavity.
A conduit within the housing communicates between the forward wall
of the second cavity and the upper frontal area of the enlargement
of the first cavity. A ball check valve within this conduit, and a
flapper valve at its terminus, permit fluidic flow from the second
cavity to the first cavity. The terminus of the conduit and the
flapper valve connected thereto are positioned over the top of the
forward edge of the bristles of the toothbrush when said brush is
fully encased within the first cavity.
A plunger operatable within the conduit of the dentifrice container
and terminating near the frontal end thereof is secured at its
rearwardmost portion to the base of the end cap. A foraminous door
slidable within opposed grooved tracks provides a closure for the
frontal opening of the case. The stem end of the toothbrush has a
downwardly biased spring leg normally housed within the case and
cap.
In operation, first the sliding door is pushed upwardly and
rearwardly to expose the frontal enlargement of the first cavity.
Then the end cap is withdrawn to the rear where it is retained from
separation of the case by a small detent. During this operation, as
the plunger is withdrawn within the dentifrice conduit, a void is
closed within the recessed end of the dentifrice container. The
dentifrice, normally toothpaste, urges the ball check valves open
and passes into the recess. As the paste is withdrawn from the
container, the sliding end plate advances forwardly a corresponding
distance. Concurrently, the end cap has passed beyond the end of
the stem of the toothbrush permitting the downwardly biased spring
leg thereof to relax into an interference position with the leading
edge of the end cap.
As the cap is pushed forwardly, the plunger exerts force within the
dentifrice container conduit. The resultant back pressure closes
the container check valves prohibiting return of the paste to the
container and opening the check valve within the housing conduit.
The paste passes through the housing conduit and is expelled into
the flapper valve at the terminus thereof. Simultaneously, with the
immediately foregoing described action, the leading edge of the end
cap slides the toothbrush forward within the first cavity. The
length of the stroke of the end cap is coincident with the length
of the bristle section of the toothbrush. Toothpaste is therefore
expelled from the terminus of the conduit during the time the upper
portion of the bristles are passing thereunder and subsequently a
layer of toothpaste is deposited substantially from one end of the
bristle end of the toothbrush to the other.
The end cap is now in its forwardmost position and the bristle
section and associated stem portion of the toothbrush are in a
position ejected from the forward end of the case. A simple thumb
index finger grip is now employed to eject the toothbrush its total
working length. A spring detent within the housing engages a notch
within the toothbrush stem to prevent total extraction of the
toothbrush from the case. The sloping forward face of the spring
leg of the toothbrush stem cams the leg upwardly within the first
cavity.
After use the toothbrush bristle section is rinsed in the normal
manner and finger pressure upon the forward edge of the toothbrush
retracts same to total enclosure within the case. During the return
of the toothbrush, the end cap is not disturbed. The frontal
sliding door is then closed to prevent inclusion of dirt into the
cavity and the toothbrush bristles, however, the foraminous portion
of the door permits passage of air to dry the bristles and prevent
contamination.
To replace dentifrice containers, the end cap is completely removed
by extra force to override its detent. The expended container is
withdrawn rearwardly from the second cavity and disposed of. A new
container is inserted, recessed end first, into the cavity into the
end cap replaced while urging gently upward on the spring leg of
the stem of the toothbrush, to prevent accidental ejection of same.
The dental hygiene unit is now ready for use as heretofore
operationally described.
BRIEF DESCRIPTION OF THE DRAWINGS
The previously stated objects and further and more specific objects
and advantages of the invention will become readily apparent to
those skilled in the art from the following detailed description of
a presently preferred embodiment thereof taken in conjunction with
the drawings, in which:
FIG. 1 is a perspective view chosen for purposes of illustrating a
dental hygiene unit constructed embodying the present invention as
it would appear in condition for carrying upon one's person;
FIG. 2 is a fragmentary perspective view of the frontal portion of
the dental hygiene unit with the toothbrush extracted in the usable
position;
FIG. 3 is a rear three-quarter perspective view of the device of
FIG. 1 with the end cap thereof removed and particularly
illustrating the replaceable disposable dentifrice container;
FIG. 4 is an elevational view in section taken along line 4--4 of
FIG. 1 and especially detailing the operative elements of the
present invention; and
FIG. 5 is an elevational view in section corresponding to FIG. 4
during an operative stage of the device.
DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT
Turning now to the drawings in which the same reference character
indicates corresponding elements throughout the several views, FIG.
1 is a perspective view of a dental hygiene unit constructed in
accordance with the teachings of the present invention and shows
the substantially rectangular elongate housing or case generally
designated by the reference numeral 10 and having a removable end
cap 11 encompassing the rearward end thereof. A flexible door 12
having openings therein disposed in grooves 13 provides a closure
for the frontal end of the case 10. A spring metal clip 14 on one
side of the case 10 accommodates the case when carried within the
pocket.
FIGS. 2 and 5 show the door 12 in the open position to permit
ejection of the toothbrush 17. It is noted in FIG. 2 that the
bristle section 18 of the toothbrush 17 contains a layer of
dentifrice 19 having been deposited simultaneously with the
ejection of the toothbrush.
FIG. 3 illustrates the end cap 11 having been removed from the case
10 to permit insertion or exchange of the cartridge-type dentifrice
container 20. Elongate openings 21 disposed on opposed sides of the
rearward end of the case 10 permit gripping the container 20 for
removal from the case. The significance of FIG. 2 and FIG. 3 will
become readily apparent when viewed in conjunction with the
following figures hereinafter described in greater detail.
FIG. 4 specifically details the operative elements of the device of
FIG. 1 when in the closed or carrying position. The stem 22 of the
toothbrush 17 is slidably encased within a first cavity 23 of the
case 10. An upwardly extending enlargement 24 of the cavity 23
provides a housing for the bristle section 18 of the toothbrush 17.
A downwardly biased spring leg 27 integral with the rearward end of
the stem 22 of the toothbrush 17 is normally housed within the end
cap 11. It is particularly noted that the interior surface of the
end cap 11 forms an unbroken continuation of the end cavity 23 thus
allowing the spring leg 27 to freely pass from the cavity 23 into
the end cap 11 during the retraction phase. A second cavity 28
houses the dentifrice container 20 within the case 10. A front end
plate 29 having a recess 30 forms the front cover for the
dentifrice container 20 and sealingly engages the frontal wall 31
of the cavity 28 when the dentifrice container is fully inserted.
Ball check valves 32 located within the front end plate 29 control
flow of the dentifrice from the container 20. An axial conduit 33
subtends the length of the container 20. An end plate 34, sealingly
engaged within periphery wall 37 of the container 20 and around the
conduit 33 of the container 20, and slidable therewith, forms the
rearward end cover for said container.
A detent 38 integral with the end cap 11 engages a notch 39 within
the outer wall of the case 10 to retain the end cap 11 in the
closed position. A second notch 40 interacts with the detent 38 to
prevent accidental removal of the end cap 11. A plunger 41 secured
at its rearward end to the inner base of the end cap 11 extends
substantially through the conduit 33 and slides within close
proximity to the interior wall thereof.
A second conduit defined by the passage 42 communicates between the
frontal wall 31 of the cavity 28 and the upper frontal area of the
forward enlargement 24. A flapper valve 43 is carried at the
terminus of the passage 42. A ball 44 normally held in the closed
position by a spring 47 forms a second ball check valve which
serves to control fluidic flow between the cavity 28 and the
enlargement 24 of the cavity 23.
FIG. 5 depicts the dental hygiene unit of FIG. 4 and the operative
elements thereof as shown during the initial stages of the ejection
of the toothbrush. The resilient door 12 has been retracted
upwardly and rearwardly within the grooves 13 to expose the front
opening of the case 10. The end cap 11 is first moved in the
direction of the arrow A until the detent 38 enters the notch 40.
During this operation the forward edge of the end cap 11 moves past
the rearward end of the spring leg 27 permitting same to relax
downwardly into an interference position with the edge 48.
Simultaneously, as the plunger 41 is withdrawn within the conduit
33, a semivacuum is created therein impelling the ball check valves
32 to open permitting flow of the dentifrice 19 into the recess 30
and partially into the conduit 33. It is particularly noted in this
view that a relative quantity of the dentifrice 19 has been
extracted from the container 20 and the end plate 34 has moved
forward an amount relative to the displaced dentifrice.
As the end cap is urged forwardly in the direction of the arrow B
there are several coincident interactions. Pressure upon the
dentifrice 19 within the cavity 30 and the conduit 33 as dictated
by the plunger 41 seats the check valves 32. Further pressure
exerted by the plunger 40 acts upon the ball 44 to compress the
spring 47 forcing the excess dentifrice 19 into the passage 42.
This fluidic flow dislodges the flapper valve 43 and subsequently
deposits the dentifrice upon the upper edge of the bristles 18 of
the toothbrush 17. Simultaneously, the toothbrush 17 is urged
forwardly by the interaction between the spring leg 27 and the
forward edge 48 of the end cap 11. As the spring leg 27 proceeds
forwardly the sloping forward edge of the tang 49 thereof overrides
the edge of the lower wall of the case 10.
The end cap is continuously urged forwardly until the detent 38
engages the notch 39. It will be apparent to those skilled in the
art that the spacing between the notches 39 and 40, thus the limit
of the end cap 11, coincides with the length of the bristle section
18, as denoted by the dimension line C. to insure that dentifrice
is deposited substantially along the length of the upper edge of
the bristle section and flow discontinued at the rearward edge
thereof.
After the end cap 11 is in the rest or forwardmost position and the
bristle section 18 of the toothbrush 17 is ejected beyond the
frontal end of the case 10, pressure directly upon the stem 22
extracts the toothbrush to its forwardmost position as determined
by the second detent 50 engaging the notch 51. The biased forward
edge of the detent 50 allows easy retraction of the toothbrush
while prohibiting total extraction thereof.
While no mention in the foregoing detailed description of the
present invention has been made of the materials employed therein,
it is obvious that numerous media may be used. Due to the action of
the detents 38 and 50 and the flapper valve 43, a semiresilient
material, as for example a synthetic polymer, would facilitate an
integrally molded unit. However, the base units could be
constructed of a more rigid material having spring or resilient
inserts where mandatory.
Various other changes in the device herein chosen for purposes of
illustration in the drawings will readily occur to persons skilled
in the art having regard to the disclosure hereof. To the extend
that such modifications and variations do not depart from the
spirit of the invention, they are intended to be included within
the scope hereof which is not limited to the device specifically
illustrated but rather only by a fair interpretation of the
following claims.
* * * * *