Dentistry – Apparatus – Having intra-oral dispensing means
Reexamination Certificate
2000-03-24
2001-11-13
Manahan, Todd E. (Department: 3732)
Dentistry
Apparatus
Having intra-oral dispensing means
C433S091000
Reexamination Certificate
active
06315556
ABSTRACT:
BACKGROUND
This invention relates to toothbrushes and in particular toothbrushes for use in oral hygiene systems suited for use by bedridden users.
Conventionally, water is applied to the bristled head of a toothbrush to assist the cleaning action of a dentifrice applied to its bristles, and following brushing, it is usual to rinse the mouth. To the able bodied or to those able to sit upright without undue difficulty, cleaning the teeth is not particularly troublesome.
However, when it is the case of a bedridden patient, not able to sit upright, or only able to sit upright with considerable difficulty and discomfort, cleaning the teeth is particularly troublesome, and especially rinsing the mouth, as neither the application of fluid to assist the action of the dentifrice nor subsequent rinsing of the mouth can be effected in conventional manner with the patient in the prone position.
It is known from such as U.S. Pat. No. 4,672,953 to provide a toothbrush with first and second passageway means through the handle for the supply of fluid to the bristles of the brush and its removal from the patient's mouth by suction, in an attempt to overcome the difficulties mentioned above in relation to patients who must, of necessity, remain in a prone position.
However, such a construction still leaves room for improvement in the sense that with prone patients it can frequently occur that the patient's mouth inadvertently closes on to the toothbrush during use causing an unrequired build-up of vacuum during removal of spent fluid. This problem is attended to in European Patent Number 0557337B where a toothbrush construction is provided that ensures that in the circumstance when a patient's mouth does inadvertently close on to the toothbrush there is the substantial guarantee that a vacuum build-up in the mouth is prevented.
SUMMARY
The object of the present invention is to provide a toothbrush construction of simpler and less expensive construction but with at the same time a significantly improved ability to provide and remove fluid and prevent a vacuum build-up.
According to a first embodiment of the present invention a toothbrush comprises a handle having a first chamber towards the closed end in which is located a bristled head, access passageways through the bristled head externally of the bristles, said access passageways communicating with the said first chamber, a fluid supply line provided on or in the side of the first chamber from which extend the bristles of the bristled head, the fluid supply line extending into the bristled head and having at least one outlet sited within the confines of the bristles, and there being in addition an air vent means located on the side of the first chamber from which extend the bristles of the bristled head, the air vent means terminating in close proximity to the bristles to that side of the bristled head.
The first chamber may be formed as a hollow length of brush handle at the end of which is located the bristled head. The fluid supply line may be integrally formed along the inner surface of the face of the handle from which the bristles extend. Alternatively, the supply line may be a separate tube-like item attached to the handle. In either instance the supply line may communicate with a fluid feed passage formed in the bristled head which fluid feed passage extends to at least one fluid outlet that may be centrally located on the head within the bristles.
Whilst an air vent means may be an air passageway formed on the same side of the handle as the fluid supply line, it is preferred to form the air vent means as a separate tube-like member attached to that side of the handle with the inlet in close proximity to the bristles, and the outlet sufficiently distanced from the inlet to ensure that the outlet cannot be fouled by the mouth.
In an alternative construction, where again a hollow handle is provided on which is located a fluid feed tube, the face of the handle from which emerge the bristles may be formed with at least one longitudinal groove one end of which is in close proximity to the bristles and the other end of which is sufficiently distanced therefrom to ensure that it cannot be fouled by the mouth, the depth of the at least one longitudinal groove being such that lips of a user could not compress thereon and hence close the groove.
Whilst the connection to the first chamber is preferably by way of access slots surrounding the bristles of the bristled head, it can be that that connection is formed by a series of small diameter holes in one or both side walls of the handle in the vicinity of the bristled head. Equally, the connection to the first chamber can be by way of both said access slots and said small diameter holes.
According to a second embodiment of the present invention, a toothbrush comprises a handle, a bristle head on the handle from which bristles extend, the bristles being supported by a bristle pad, the bristles being such that they are in close butting relationship with the sides of recess in which the bristle pad is sited, from which recess the bristles emerge, there being a supply line for fluid extending through the handle to the bristle head, said supply line having an outlet emerging directly in the bristles, there being a vacuum connection through the handle extending to the recess in which the bristle head is sited, and there being air vent means located on the handle and extending along the handle from a position in close proximity to the bristles, the air vent means having a number of inlet passageways in longitudinal spaced relationship along the length of the air vent means.
Most desirably, the bristle pad is dimensioned such that it locates in the recess in the bristle head with clearance on all four sides, and it is further desirable that the base of the recess is provided with projections on which the bristle pad sits, to hold the bristle pad clear of the base of the recess.
The vent may be a tube-like member located on the handle, but preferably the vent is formed by at least one and preferably two diametrically opposed passageways within the confines of the handle, with longitudinally spaced access holes through the outer wall of the passageway.
To enable the toothbrush of the invention to be used in conjunction with a machine such as is disclosed in European Patent Number 0557337B, the end of the handle remote from the bristle head may be fashioned as a plug-like connector, the machine being provided with a mating plug-like connector such that the first chamber can be connected to a source of vacuum, i.e., a vacuum pump located on the machine, and the fluid supply line to a source of pressure fluid i.e., to a fluid pump on the machine, by one simple act. It enables a brush to be dedicated to a particular use in the circumstance where it is the machine of European Patent Number 0557337B, and in use as in such as a hospital.
When in use and the first chamber and fluid supply line appropriately connected to a source of vacuum and a source of pressure fluid the brush can be applied to a patients mouth with a most effective provision of fluid and suction to enable the teeth of a prone patient to be cleaned without fluid filling and issuing from the mouth. The presence of air vent means in a most simple and cost effective manner as is described above provides a most effective guarantee that in the event a prone and perhaps comatose users mouth closing on to the handle the air vent means are not blocked and consequently there is the guarantee of the effective removal of fluid from within the mouth and the prevention of an uncomfortable and unwanted build-up of vacuum in the patients mouth.
In its first form of construction, the invention provides a most efficient means of providing a required fluid to the mouth of a patient and its removal whilst ensuring that the inadvertent closing of the mouth of the patient does not cause a build up of vacuum, and in its second form of construction, the disposition of the bristle pad in the recess in the head and their abutting relationship to the sid
Manahan Todd #E.
Trexler, Bushnell Giangiorgi, Blackstone & Marr, Ltd.
LandOfFree
Toothbrush with fluid supply and suction does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Toothbrush with fluid supply and suction, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Toothbrush with fluid supply and suction will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-2581474