U.S. patent number 3,771,226 [Application Number 05/165,617] was granted by the patent office on 1973-11-13 for water flush cuspidor.
This patent grant is currently assigned to Syndent Corporation. Invention is credited to Samuel Scott Caley, Nathaniel H. Lieb.
United States Patent |
3,771,226 |
Lieb , et al. |
November 13, 1973 |
**Please see images for:
( Certificate of Correction ) ** |
WATER FLUSH CUSPIDOR
Abstract
A water flush cuspidor adapted for use with a dental chair that
is vertically movable. The water flush cuspidor is mounted on the
seat plate by hinged arms. The cuspidor is rotatable from the left
side to the right side of the dental chair, rendering the chair
usable by both left-handed and right-handed dentists. Additionally,
the cuspidor is movable longitudinally relative to the chair. As
the chair is raised, the cuspidor will be raised therewith, thereby
placing the cuspidor at the proper height for patient use at all
times without further adjustment.
Inventors: |
Lieb; Nathaniel H. (Narberth,
PA), Caley; Samuel Scott (Elverson, PA) |
Assignee: |
Syndent Corporation (West
Conshohocken, PA)
|
Family
ID: |
22599674 |
Appl.
No.: |
05/165,617 |
Filed: |
July 23, 1971 |
Current U.S.
Class: |
433/33; 433/97;
433/77 |
Current CPC
Class: |
F16M
11/18 (20130101); A61G 15/14 (20130101); F16M
11/2014 (20130101); F16M 11/08 (20130101); F16M
13/02 (20130101); F16M 11/30 (20130101); F16M
2200/065 (20130101) |
Current International
Class: |
A61G
15/14 (20060101); A61G 15/00 (20060101); F16M
11/02 (20060101); F16M 11/04 (20060101); A61c
019/02 () |
Field of
Search: |
;297/188 ;9/263
;32/22 |
References Cited
[Referenced By]
U.S. Patent Documents
Foreign Patent Documents
Primary Examiner: Peshock; Robert
Claims
What is claimed as the invention is:
1. A water flush cuspidor assembly comprising a cuspidor and a
support assembly for said cuspidor, said support assembly being
adapted to be rotatably mounted on the seat plate of a dental
chair, whereby the raising or lowering of the chair will raise or
lower the support assembly, said support assembly comprising a
first arm and a second arm, said first arm being rotatably secured
at one end to means for mounting said support assembly on said seat
plate, said first arm being rotatably secured to said second arm at
its other end, said first arm being rotatable around a vertical
axis at said mounting means, said second arm being rotatable around
a vertical axis with respect to said first arm,said arms, in
combination, having a horizontal dimension and a vertical
dimension, said horizontal dimension being sufficiently great to
permit the water flush cuspidor assembly to be rotated from the
left side to the right side of the dental chair without any
interference from the chair, and said vertical dimension being
sufficiently great to position the cuspidor at a convenient height
for a patient sitting in the chair, whereby said support assembly
can be pivotally moved to vary the horizontal location of said
cuspidor.
2. The water flush cuspidor assembly of claim 1 and further
including a water line passing through said arms and to said
cuspidor.
3. The water flush cuspidor assembly of claim 1 wherein said second
arm includes an upwardly inclined extension, said cuspidor being
secured on said extension.
4. The water flush cuspidor assembly of claim 1 wherein said arms
are hollow, said support assembly further including a water line
and a vacuum line passing through said arms and to said
cuspidor.
5. The water flush cuspidor assembly of claim 4 and further
including an electrical line passing through said arms and to said
cuspidor, said electrical line being connected to a water heater in
said cuspidor.
6. The water flush cuspidor assembly of claim 4 and further
including an air line passing through said arms and to said
cuspidor, said air line being connected to a syringe held by said
cuspidor.
7. The water flush cuspidor assembly of claim 4 and further
including a drain line passing through said arms and to said
cuspidor, said drain line being connected to the drain of a bowl in
said cuspidor.
8. The water flush cuspidor assembly of claim 1 wherein said
cuspidor comprises a base plate and a cover plate, a bowl
positioned in said cover plate to accept material expectorated by a
patient, a support arm mounted on said base plate, said support arm
including a bar spaced from said base plate, said bar having
notches therein for securement of dental equipment.
9. The water flush cuspidor assembly of claim 8 wherein one of said
notches contains a saliva ejector, another of said notches contains
a high speed evacuator and a third of said notches contains a
syringe, with the air, vacuum and water supplies for the dental
equipment passing through said support assembly and to said
cuspidor.
10. The water flush cuspidor assembly of claim 1 wherein said
cuspidor comprises a base plate and a cover plate, said cover plate
having a bowl formed therein for reception of the material
expectorated by a patient, means for supplying rinse water to said
bowl, and a faucet mounted on said cuspidor, said faucet being
adapted to furnish rinse water for a patient, with the water supply
for said cuspidor passing through said support assembly.
Description
This invention relates to a water flush cuspidor, and more
particularly, to a water flush cuspidor that is particularly
adapted for use on dentists' chairs.
Typically, dentists' offices are provided with chairs that are
vertically adjustable and with consoles which house the dentists'
tools and the water flush cuspidor for the patient. The cuspidor is
rigidly mounted with respect to the chair, and cannot be moved to
accommodate varying sized patients. Frequently, therefore, a great
deal of time is lost when the dentist is treating the patient
because of the time necessary to allow the patient to use the
cuspidor in order to empty his mouth. Additionally, because of the
fixed location of the cuspidor, a given chair can only be used by
either a right-handed dentist or a left-handed dentist, but not
both, since the cuspidor will interfere with dentists' use of the
chair on the side of the chair where the cuspidor is located.
An apparatus which has overcome the bulk of the problems of the
fixed cuspidor is disclosed in U.S. Pat. No. 3,524,676. This patent
discloses a water flush cuspidor that is mounted on a ring
supported at the base of the dental chair. The cuspidor can be
rotated to either side of the chair, thereby rendering the same
useful with both left-handed and right-handed dentists.
Additionally, the cuspidor is adjustable in height, and
accordingly, can be used with varying sized patients.
The device of this invention includes all of the advantages of the
device disclosed in U.S. Pat. No. 3,524,676, and in addition,
possesses a number of additional advantages of its own. The device
of this invention is rotatable around the chair, and accordingly
can be used either by left-handed or right-handed dentists. This
feature is particularly useful in dental clinics, such as those at
dental schools, where a number of different dentists or oral
hygienists will be using the same chair. Thus, the chair can
readily be used by any of the students in the school, and it will
not be necessary to provide left-hand chairs and right-hand chairs
for the students.
One of the novel features of the device of this invention is the
fact that the cuspidor will rise or be lowered along with the
rising or lowering of the chair. Thus, it will not be necessary to
reposition the cuspidor after the chair has been raised. In this
device in U.S. Pat. No. 3,524,676, the mounting of the cuspidor is
independent of the raising and lowering of the chair. Accordingly,
the device must be readjusted each time the chair is raised or
lowered.
Another feature of the device of this invention is the fact that
the cuspidor is readily moved forward or backward, that is, along
the longitudinal axis of the chair, to accommodate the size of the
patient. This cannot be readily accomplished with the device
disclosed in U.S. Pat. No. 3,524,676.
Another advantage of the device of this invention over that
disclosed in U.S. Pat. No. 3,524,676 is that the chair movement
will not affect the cuspidor. Thus, in the prior device, unless the
cuspidor has been moved out of the way with respect to the chair,
the chair can damage the unit when it is raised or lowered. In the
device of this invention, the raising or lowering of the chair will
automatically raise or lower the cuspidor, and no damage can result
to the cuspidor from this movement.
It is accordingly an object of this invention to provide a novel
water flush cuspidor.
It is another object of this invention to provide a novel water
flush cuspidor that is adapted for mounting on a dental chair, and
which will rise or be lowered along with the raising or lowering of
the dental chair.
These and other objects of the invention are accomplished by
providing a water flush cuspidor comprising a bowl, a support
assembly for the bowl, said support assembly being adapted to be
rotatably mounted on the seat plate of a dental chair, whereby the
raising or lowering of the chair will raise or lower the support
assembly, said support assembly including hinge means for varying
the horizontal location of said bowl.
Other objects and many of the attendant advantages of this
invention will be readily appreciated as the same becomes better
understood by reference to the following detailed description when
considered in connection with the accompanying drawings
wherein:
FIG. 1 is a perspective view of the water flush cuspidor assembly
of this invention, with a dental chair shown in phantom;
FIG. 2 is a top plan view of the device of FIG. 1, and showing the
two positions for the device on opposite sides of the dental
chair;
FIG. 3 is an elevational view taken in the direction of line 3--3
of FIG. 2, with portions broken away for the purpose of
clarity;
FIG. 4 is a top plan view of the attachment of the support assembly
to the dental chair, and is taken in the direction of line 4--4 of
FIG. 3;
FIG. 5 is a sectional view taken along the line 5--5 of FIG. 3;
FIG. 6 is an enlarged sectional view taken along the line 6--6 of
FIG. 3;
FIG. 7 is an enlarged sectional view taken in the area 7 of FIG.
3;
FIG. 8 is a sectional view taken along the line 8--8 of FIG. 7;
FIG. 9 is an enlarged sectional view taken along the line 9--9 of
FIG. 3;
FIG. 10 is a perspective view of the water flush cuspidor;
FIG. 11 is a sectional view taken along the line 11--11 of FIG.
10;
FIG. 12 is an exploded diagrammatic fragmentary perspective view
showing the plumbing and electrical components enclosed in the
cuspidor housing;
FIG. 13 is a piping diagram for the vacuum operated cuspidor;
and
FIG. 14 is a piping diagram for the natural drain cuspidor.
Referring now in greater detail to the various figures of the
drawings wherein like reference characters refer to like parts, a
water flush cuspidor unit embodying the present invention is
generally shown at 20 in FIG. 1. Device 20 basically comprises a
cuspidor 22 and a support assembly 24.
The device of this invention is adapted to be mounted on any dental
chair. It is particularly useful on dental chairs that can be
raised or lowered, which is a property of substantially every
dental chair now in use. By way of example, a dental chair has been
shown in phantom at 26 in FIG. 1. Chair 26 includes the usual
elements of the dental chairs currently in use, such as a base 28,
a seat raising assembly 30 which is housed in an accordion pleated
sleeve 32, a seat plate 34 and a seat 36. The chair also includes
pedals, such as those shown at 38, for raising and lowering the
seat and for tilting the seat. The vertical reciprocation of the
seat is indicated by arrows 40 in FIG. 1.
The support assembly 24 for the device of this invention is secured
to chair 26 through the use of a bar 42 (FIG. 1) that is bolted to
seat plate 34. Bar 42 includes a vertical plate 44 at the end
thereof. As seen in FIGS. 1 and 4, a mounting plate 46 is secured
on plate 44 through the use of bolts 48 and associated nuts. A pair
of spaced flanges 50 projects horizontally outward from the front
face of plate 46 (FIGS. 1 and 3). Arm 52 of support assembly 24
includes a pair of plates 54 that are pivotally mounted in flanges
50 by pins 56.
As seen in FIG. 7, arm 52 is hollow, and includes a pair of
horizontal plates 56 at one end thereof. A second arm 60 includes a
pair of plate extensions 62 which overlie plates 58. Upper plate 62
includes a downwardly projecting pin 64 that is received in an
opening in the upper plate 58. A washer 66 separates the two
plates.
A bolt 68 passes through a pair of aligned holes in the lower plate
62 and the lower plate 58. A washer 70 is telescoped over bolt 68
and positioned between the plates. A nut 72 secures the bolt in
place.
As seen in FIG. 1, arm 60 includes an upwardly inclined extension
74. Cuspidor 22 is mounted on the top of extension 74. As further
seen in FIG. 1, arm 52 is held in its horizontal position through
flanges 50 and their associated pins. Likewise, arm 60 is
maintained in a horizontal plane through plates 62 and 58 and pin
64 and bolt 68. The extension 74 in turn maintains the cuspidor 22
in its horizontal position.
As chair 26 is raised, seat plate 34 will be raised therewith. This
in turn will cause the raising of arms 52 and 60 and the cuspidor
22. Likewise, as the seat is lowered, the arms and the cuspidor
will also be lowered. The vertical reciprocation of the support
assembly 24 and the cuspidor 22 are indicated by arrows 76 and 78,
respectively, in FIG. 1. Additionally, as seen in FIG. 2, the
support assembly 24 and cuspidor 22 are swingable about chair 26
from the position shown in full line on one side of the chair to
the position shown in phantom at 24' and 22', respectively, on the
other side of the chair.
Referring to FIG. 2, it is seen that arms 52 are rotatable about
pins 56 from any position on one side of the chair, which is shown
in full line, to any position on the other side of the chair, which
is shown in phantom at 52'. The arc of rotation of arm 52 is
indicated by arrows 80 and 80'. Likewise, arm 60 is rotatable about
arm 52 through pin 64 and bolt 68. This arc of rotation is
indicated by arrows 82 in FIG. 2. It should also be noted in FIG. 2
that cuspidor 22 is completely horizontally adjustable on either
side of chair 26. Thus, the cuspidor can be moved fore and aft,
that is, longitudinally along the side of the chair, and in
addition, can be moved toward and away from the patient. This is
accomplished through the use of the dual pivot points at both ends
of arm 52. Thus, the cuspidor is substantially universally
adjustable in it horizontal plane.
Referring to FIG. 1, it is seen that a control box 84 is provided
for the cuspidor 22. A flexible conduit 86 emanates from control
box 84 and enters arm 52. The flexible conduit houses all of the
various lines used in the operation of the cuspidor 22. Thus, it
will contain a drain line, when the cuspidor is used with the
natural drain, an electrical line, a water supply line, an air
supply line and a vacuum drain line. All of these lines are
connected in box 84 with permanent lines within the dentists'
office or within the clinic. Insofar as the vacuum line is
concerned, it will be connected to the vacuum source in box 84.
Box 84 also includes 24 volt transformer for the electrical line. A
rod 88 (FIG. 1) passes through box 84, and is movable horizontally
therein. This rod is used for opening or closing all lines that are
connected in the box. A pilot light 90 indicates whether the
various lines are opened or closed.
Referring to FIG. 3, it is seen that flexible conduit 86 is secured
on a sleeve 92 which projects downwardly from bottom flange 50. The
sleeve is hollow, and the various lines within conduit 86 pass into
arm 52. Referring to FIG. 9, it is seen that arm 52 is basically
rectangular in cross section, and is hollow. The various lines
leading to cuspidor 22 are shown therein. These lines include a
vacuum line 94, an electrical line 96, a water line 98 and an air
line 100. In addition, as will be explained hereinafter, the
cuspidor 22 can be operated either on a natural drain or on a
vacuum drain. When it is used on a natural drain, a drain line 102
is included.
Arm 60 and its extension 74 are also hollow, and have the same
cross section as arm 52. All of the lines passing through arm 52
pass through arm 60 and up into extension 74, where they are
eventually connected to the various components within cuspidor 22,
as will be explained hereinafter. Since the various lines are
flexible, they will readily adapt to any position of the hinges
formed at the ends of arm 52.
The cuspidor is shown in detail in FIGS. 10 and 11. The cuspidor
basically comprises a base plate 104 having an upstanding wall 106
and a cover plate 108 having a dependent wall 110. Cover plate 108
includes a circular opening having a down-turned lip 112 therein.
Bowl 14 of the cuspidor is positioned within the opening, and a
gasket 116 holds the bowl in a watertight condition within cover
plate 108. A faucet 118 is provided for filling a cup that is
positioned in recess 120 of the cover plate. A push button 122 is
used for opening the faucet 118.
Bowl 114 includes a tubular drain 124 at the center thereof. A
coiled compression spring 126 is telescoped around drain 124, and
bears against the bottom of bowl 114 and against the top of base
plate 104. Spring 126 holds the top of bowl 114 in sealing
engagement with gasket 116. The cover plate 108 is releasably
secured on base plate 104 by any of the conventional means known to
the art, such as a snap fit of the cover plate over a resilient
plate projecting upwardly from the base plate. Other means, such as
nuts, bolts and linking plates can also be used. A drain pipe 128
is telescoped over drain 124 of bowl 114. An O-ring 130 provides a
liquid type connection between drain 124 and pipe 130. Pipe 130
includes an L-extension 132.
Water for bowl 114 enters through a pipe 134, and then through a
block 136 mounted on the interior of the bowl. A spigot 138 is
positioned at the top of block 136 and is pointed downwardly into
the bowl. A removable solids collector or strainer 140 is
positioned in drain 124 of bowl 114.
An instrument plate 142 is suspended from the bottom of base plate
104 by bars 144. A plurality of notches 146 is formed in instrument
plate 142. The purpose of notches 146 is to support various dental
instruments that are associated with the cuspidor, such as a saliva
ejector 148 (FIG. 1), a syringe 150 and a high speed evacuator 152.
Bars 144, in addition to serving the function of supporting
instrument plate 142, also serve the function of handgrips for
moving cuspidor 22 to its desired position.
Referring to FIG. 5, it is seen that the various lines associated
with the support assembly 24 pass through extension 74 into an
opening 154 in base plate 104. Extension 74 supports the cuspidor
22 through the use of brackets 156 which are mounted on the base
plate 104.
The various lines passing through opening 154 are shown in detail
in FIG. 12. Thus, water line 98 passes into a water filter and
regulator 158. From the regulator, a first exit line 160 is
provided. Line 160 is coupled with a line 162 through which the
water passes to a water heater 164. A thermostat 166 is associated
with the water heater. Current for the water heater is provided
through electrical line 96. The water heater additionally includes
a switch 168 and a pilot light 170.
Heated water leaves heater 164 through line 172. The water passing
through line 172 is connected to syringe 154. The syringe 154 can
be any of the types known to the art, but in the embodiment shown,
is a three-way syringe. Thus, it can be used to spray air, water or
a combination of air and water.
A second line 174 leaves heater 164 and enters a block 176. A first
line 178 leaving block 176 supplies the water for faucet 118. The
flow of water from the faucet is controlled by push button 122,
which is a part of a valve mechanism.
A second line 180 leaves block 176. This line is controlled through
a valve 182 having an upwardly projecting shaft 184 for opening and
closing the valve. Water passing through line 180 is projected into
bowl 114 through spigot 138. A manually operated valve 186 is used
to control the rate of flow through spigot 138. The supply to block
176 for water line 180 is through line 188 which is connected to
line 160.
The water supply lines 180 and 188 described above are used when
the bowl 144 is used in connection with a vacuum drain, as will be
explained hereinafter. When there is no vacuum drain, and a natural
drain is used, the water supply to bowl 144 is continually
operated, and there is no intermittent operation through the use of
valve 182. In this case, line 188 and the first portion of line 180
are eliminated, and a line 190 connects line 160 with the latter
half of line 180. When line 190 is used, water is continually fed
to bowl 114, unless valve 186 is closed. Thus, the valve 186 not
only controls the rate of flow of the water to the bowl, but also
is used to stop all water flow to the bowl. It should also be noted
that when line 190 is used, line 188 and the first portion of line
180 are eliminated. Likewise, when line 188 and the first portion
of line 180 are used, line 190 is eliminated.
Another water line 192 emanates from water filter and regulator
158. Water passing through line 192 is used with a hydrocolloid.
The hydrocolloid is a conventional device which furnishes chilled
water to hardened wax impressions taken in the mouth of the
patient. The chilled water for the hydrocolloid can be supplied at
the water source for water line 98.
Line 192 terminates in a quick-disconnect 194. The hydrocolloid has
its inlet line connected to quick-disconnect 194 and its outlet
line connected to quick disconnect 196. The quick-disconnects are
well known to the art and in and of themselves, form no part of
this invention. The outlet water from the hydrocolloid passes
through line 198, which is in turn connected to the vacuum manifold
or natural drain, depending on the drain system being used.
The incoming air, which enters through air line 100, passes through
a filter 200. It leaves filter 200 through line 202 which connects
the air supply with syringe 150.
Vacuum line 94 passes through opening 154 in base plate 104. The
vacuum line is connected within the cuspidor to a solids collector
204. A line 206 connects the high speed evacuator 152 with the
solids collector 204. A line 208 connects the saliva ejector 148
with the solids collector 204. Thus, any solids removed by the
saliva ejector or high speed evacuator are removed by solids
collector 204 before the liquid and air passing through the line
are transmitted to vacuum line 94.
When the cuspidor 22 is vacuum controlled, actuation for the vacuum
system is through the use of bar 210. Bar 210 is positioned on a
bracket 212 which is in turn pivotally mounted on the cuspidor
housing, as by pins 214 (one shown in FIG. 12). Bracket 212 has a
hole formed in one leg thereof, and one leg of a U-shaped rod 216
is received in the hole. The lower leg of rod 216 is received in a
hole in shaft 218 of a valve 220.
In using the cuspidor 22 with a vacuum drain, a line 222 is coupled
to L-extension 132 (FIG. 11) of drain pipe 128. Line 222 is
connected to valve 220, and a line 224 emanates from the valve.
Line 224 passes to a vacuum manifold, which is in turn connected
with vacuum drain line 94.
When the cuspidor 22 is used in a natural drain system, lines 222
and 224 and valve 220 are eliminated. Likewise, bar 210 and its
associated bracket 212 are also eliminated. The bracket 212
includes a flange 226 which is used for flushing the bowl 114 when
the vacuum drain is used. This flange can also be eliminated.
Accordingly, when the bowl 114 is connected with the natural drain,
drain pipe 102 is connected to L-extension 132 (FIG. 11) of drain
128. The material leaving the bowl will flow, by gravity, through
the bowl, through drain 128 and out through line 102.
A piping diagram for the vacuum operated system is shown in FIG.
13. The operation of the vacuum system can be seen through the use
of FIGS. 12 and 13. When using the vacuum system, any material
placed in bowl 114 is not withdrawn from the system until the
vacuum is actuated. Thus, if the patient should expectorate the
contents of his mouth, as when rinsing, into the bowl 114, the
solids will be retained by strainer 140, and the liquids will pass
into drain 128 (FIG. 11). Periodically, the system will have to be
flushed. The flushing of the system is accomplished by depressing
bar 210.
When the bar 210 is depressed, bracket 212 will be pivoted, thereby
raising U-shaped rod 216. This in turn raises valve shaft 218,
thereby opening valve 220. Any materials that are in drain 128 pass
through line 222, valve 220 and line 224 into vacuum manifold 228
(FIG. 13). From the vacuum manifold, the drain materials are
evacuated from the system through line 94 by vacuum pump 230 (FIG.
13).
At the same time the vacuum system is actuated, a water spray
passes into bowl 114 through spigot 138 in order to clean the bowl.
The actuation for the water spray is through bar 210. Accordingly,
the vacuum system and the water spray are actuated simultaneously.
When the bar 210 is depressed, flange 226 will also be depressed,
thereby depressing shaft 184 of valve 182. This permits water to
flow through line 180 into the bowl 114.
It is thus seen that no water enters bowl 114 except when bar 210
is depressed. This also actuates the vacuum system at the same time
as pointed out above.
The other lines used in the vacuum system are shown in FIG. 13.
These other lines are common to both the vacuum system and the
natural drain system, and operate independently of the vacuum
system. Thus, water and air are continually supplied to syringe
150, and the vacuum line 94 used in connection with the high speed
evacuator 152 and saliva ejector 148 is always in operation.
Likewise, there is a continuous supply of water to valve 122
through line 174. Solids collector 204 removes any solids brought
into the system through the high speed evacuator or saliva ejector.
Strainer 140 removes any solids that are placed in the bowl
114.
It should also be noted in FIG. 13 that the hydrocolloid lines 192
and 198 also operate independently of the vacuum drain for the bowl
114. The hydrocolloid lines are connected directly to the vacuum
manifold, and are independent of the valves 182 and 220 used in
connection with the vacuum drain.
FIG. 14 is a piping diagram for the cuspidor when used with a
natural drain. A comparison of FIG. 13 to FIG. 14 shows that many
of the lines are identical in both systems. Thus, the water and air
lines are identical for the syringe 150, and the lines for the high
speed evacuator 152 and saliva ejector 148 are identical in both
systems. In the natural drain system, however, the vacuum line to
the cuspidor is eliminated, along with its valve. The intermittant
valved system for regulating the water supply to the bowl 114 is
eliminated, and the actuating bar 110 is eliminated.
In the natural drain system, the water supply to the bowl 114 is
constantly flowing through line 190, and the water volume is
regulated by valve 186. The cuspidor is continuously drained
through line 102 which terminates in a natural drain 232. Likewise,
the drain line 198 for the hydrocolloid is connected to drain line
102, and thus is placed on a natural drain system.
It should be noted that even when the bowl 114 is on a natural
drain system, the vacuum line 194 is still used in connection with
the high speed evacuator and saliva ejector. However, when the
cuspidor is vacuum operated, the natural drain line 102 is
eliminated entirely.
The cuspidor of this system is readily adapted for use with either
a vacuum drain or a natural drain. The assembly of the cuspidor for
either type of system is readily accomplished, and the major
portion of the lines going to and emanating from the cuspidor is
common to both types of systems. Regardless of the type of system
used, the support assembly 24 for the cuspidor need not be
modified, with the exception of the fact that natural drain line
102 can be eliminated when the vacuum drain is used.
The cuspidor of this invention is adapted for use with any of the
elements generally used by a dentist in the treatment of his
patients. By way of example, the high speed evacuator, saliva
ejector and syringe have been shown, since these three elements are
best adapted for use with the cuspidor. The cuspidor has a
self-contained heater and a water supply for rinse water. There is
also a water supply for rinsing the bowl 114. One unique feature of
the cuspidor is the fact that it will be raised and lowered as the
patient's chair is raised and lowered, and can be moved to
substantially any horizontal position on either side of the chair,
thereby rendering it effective for use by either a left-handed or
right-handed dentist. Additionally, because of the complete
mobility of the cuspidor, it is particularly adapted for use in
four handed dentistry. Thus, treatment of a patient's mouth may be
carried out by either two dentists or by a dentist and his
assistant, such as a oral hygienist.
Since the cuspidor will rise along with the raising of the chair,
there is no danger of the chairs hitting the cuspidor when it is
raised. In the aforementioned U.S. Pat. No. 3,524,676, it is
possible for the chair to hit and damage the cuspidor when the
chair is raised, since the movement of the cuspidor is completely
independent of the raising and lowering of the chair. In the device
of this invention, the vertical position of the cuspidor need not
be adjusted as the chair is raised or lowered.
Without further elaboration, the foregoing will so fully illustrate
our invention that others may, by applying current or future
knowledge, readily adapt the same for use under various conditions
of service.
* * * * *