Dentistry – Apparatus – Having intra-oral dispensing means
Reexamination Certificate
1999-03-29
2001-01-30
Lewis, Ralph A. (Department: 3732)
Dentistry
Apparatus
Having intra-oral dispensing means
C433S082000
Reexamination Certificate
active
06179613
ABSTRACT:
BACKGROUND OF THE INVENTION
1. Field of the Invention
The present invention relates to a compressed water supply system and a supply device for a dental unit-chair. More particularly, it relates to a compressed water supply system and a compressed water supply device for a dental unit-chair which is capable of purifying and providing continuously the purified and compressed water to a medical instrument installed on the dental unit-chair, maintaining a given level of pressure.
2. Discussion of Related Art
In case that a high speed rotation or pressure jet is required in medical instruments such as dental unit-chairs, the compressed air supplied from an air compressor is used. A contra-angle handpiece of dental surgery rotates a finishing bur at high speed (about several thousands or several ten thousands revolutions per minute) by using the compressed air, and a three-way syringe jets out the compressed air and the compressed water to clean a required portion of a human body.
The above contra-angle handpiece uses the compressed water of the same pressure level to cool the friction heat, generated from the finishing bur rotating at high speed, and to remove remainders. This contra-angle handpiece or three-way syringe is provided to a medical unit-chair on which a patient sits or lies. Particularly, a dental unit-chair also has an oral washstand on which a patient can gargle with the water provided from a compressed water supply system.
According to the conventional art, the compressed water is provided by a compressor supplying compressed air. In other words, in the compressed water supply system a given amount of water is held in a storage tank and a part of the compressed air jet out from the compressor is supplied to the storage tank's upper portion. The water in the storage tank is jet out by a given level of pressure of the compressed air.
According to the conventional compressed water supply system, since the water in the storage tank becomes compressed water by the compressed air, if the water in the storage tank is all consumed, the compressed water can be supplied by refilling the storage tank, and the compressor should be operated whenever using the compressed water, thus increasing the power consumption, damaging the components, and reducing the life of the compressor.
In addition, the supply of the compressed water may be cut off during treatment, and in this occasion, the trouble is that the treatment cannot be restarted until the water fills in the storage tank. Since the compressed air is provided to the storage tank without using any air purifying device, the water and the air may be polluted with germs, and a portion to be treated may be infected. Even if the purified water is used, the dust in the air contaminates the water in the storage tank, thus propagating the germs enormously.
When using the water not purified as the compressed water, the dust and dirt in the water may be inserted into a small gap of the precise medical instrument such as the contra-angle handpiece, which damages the medical instrument and increases the consumption of components. If the dust and dirt cause damage to the medical instrument during treatment, the treatment cannot be restarted until the instrument is repaired.
In addition, since the temperature of the water provided to the oral washstand for the dental unit-chair is low, a patient may feel very chilly during gargling after treatment. Therefore, there is a conventional art with a small heater provided to a compressed water supply tube connecting the compressed water supply system to the oral washstand, thus supplying the hot water. However, it takes time to heat the water passing the compressed water supply tube.
SUMMARY OF THE INVENTION
Accordingly, the present invention is directed to a compressed water supply system for a dental unit-chair and a compressed water supply device that substantially obviate one or more of the problems due to limitations and disadvantages of the related art.
An object of the present invention is to provide a compressed water supply system for a dental unit-chair and a compressed water supply device which purify and continuously supply input water to which a given pressure is applied to a medical instrument on the dental unit-chair.
Additional features and advantages of the invention will be set forth in the description which follows, and in part will be apparent from the description, or may be learned by practice of the invention. The objectives and other advantages of the invention will be realized and attained by the structure particularly pointed out in the written description and claims hereof as well as the appended drawings.
To achieve these and other advantages and in accordance with the purpose of the present invention, as embodied and broadly described, the present invention provides a compressed water supply system for a dental unit-chair including a water purifier purifying or sterilizing water from a water supply source, and supplying the water to which a given pressure is applied to a medical instrument installed on the dental unit-chair. The water purifier is designed to be of multi-stage to remove various alien substances, heavy metals, ions, germs, etc. from the compressed water, and is connected to at least one carbon filter or reverse osmotic pressure filter. The pressure means pressurizes the water from the water supply source and supplies the water to the water purifier under a given pressure used in the medical instrument on the dental unit-chair. A pump is used as the pressure means.
The compressed water supply system further includes a preliminary filter removing sands, floating materials, or rusty remainders from the water introduced to the pressure means; a storage tank storing the compressed water from the water purifier under a given pressure; a pressure control means installed between the water purifier and the storage tank; and a heating means heating the compressed water from the water purifier at a given temperature, and supplying the water to the medical instrument.
The compressed water supply system further includes an auxiliary filter removing an offensive taste, odor, coloring matters, ions, etc. from the compressed water that has passed the water purifier, and providing the drinking water and distilled water.
According to another aspect of the present invention, a compressed water supply device for a dental unit-chair includes a case; an inflow tube provided to the case and connected to a water supply source; a pump installed within the case and connected to the inflow tube to jet out the water from the water supply source under a given pressure; a water purifier provided to the case in multi-stage and removing various alien substances, chemical substances, heavy metals, ions, germs, etc. from the water supplied from the pump; and
a compressed water supply tube provided to the case, connected with the water purifier, and connected to a medical instrument installed on the dental unit-chair, thus providing the compressed water thereto.
The inflow tube has a preliminary filter for removing sands, floating materials, or rusty remainders from the water. The water purifier includes at least one carbon filter removing chemical substances and the like from the compressed water jet out from the pump; and at least one reverse osmotic pressure filter connected to a waste water tube and removing heavy metals, ions or germs from the compressed water that has passed the carbon filter. A pressure gauge is installed between the carbon filter and the reverse osmotic pressure filter of the water purifier for measuring the pressure of the water compressed via the pump.
The compressed water supply device further includes a drinking water supply tube diverging from the compressed water supply tube and provided to the case; and an auxiliary filter provided to the drinking water supply tube and removing an offensive taste, odor, coloring matters, ions, etc. from the compressed water to supply the compressed water as drinking water and distilled water for disinfection.
The comp
Ladas and Parry
Lewis Ralph A.
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