Water supply system of dental chair and use method thereof

文档序号:25548 发布日期:2021-09-24 浏览:44次 中文

阅读说明:本技术 一种牙椅的供水系统及其使用方法 (Water supply system of dental chair and use method thereof ) 是由 姜晓燕 柳忠豪 于 2021-08-10 设计创作,主要内容包括:本发明涉及一种牙椅的供水系统及其使用方法,属于牙椅用供水系统技术领域。一种牙椅的供水系统,包括水袋和与水袋连接的供水管路,其特征在于,所述的水袋可拆装的安装在气囊固定座内,气囊固定安装在气囊固定座内;通过向气囊中充气的方式挤压水袋,将水袋的水挤出。并提供了该牙椅的使用方法。本申请的牙椅供水系统具有便于快速更换水袋和供水管路的特点。(The invention relates to a water supply system of a dental chair and a use method thereof, belonging to the technical field of water supply systems for dental chairs. A water supply system of a dental chair comprises a water bag and a water supply pipeline connected with the water bag, and is characterized in that the water bag is detachably arranged in an air bag fixing seat, and the air bag is fixedly arranged in the air bag fixing seat; the water bag is squeezed by inflating the air bag, so that the water in the water bag is squeezed out. And provides a method for using the dental chair. The utility model provides a dental chair water supply system has the characteristics of the quick replacement water bag of being convenient for and supply line.)

1. A water supply system of a dental chair comprises a water bag (3) and a water supply pipeline connected with the water bag (3), and is characterized in that the water bag (3) is detachably arranged in an air bag fixing seat (1), and an air bag (2) is fixedly arranged in the air bag fixing seat (1); the water bag (3) is pressed by inflating the air bag (2) to squeeze out the water in the water bag (2).

2. The water supply system for dental chairs according to claim 1, wherein the water outlet of the water bag (3) is connected to a water supply line, which has at least one water duct a (4); and a waterway control valve (6) is arranged on the pipeline of the water delivery pipe A (4).

3. The water supply system for dental chairs according to claim 2, characterised in that said waterway control valve (6) comprises an actuating valve body (61) and a water socket (62) mounted at the end of the actuating valve body (61); the water pipe seat (62) is provided with a water pipe clamping groove (62.1) and a sliding guide groove (62.2) vertical to the water pipe clamping groove (62.1); the water pipe clamping groove (62.1) and the sliding guide groove (62.2) are crossed; the drive valve body (61) includes a drive portion and a valve body portion; the driving part comprises a driving valve body seat (61.1), one end of the driving valve body seat (61.1) is provided with a driving cavity, the bottom of the driving cavity is provided with a valve rod through hole, and the other end of the driving valve body seat (61.1) is provided with a normal air supply inlet (61.4) communicated with the valve rod through hole and a through hole communicated with the valve body part; a valve rod driving the valve core (61.2) is inserted into the valve rod through hole, a valve cap driving the valve core (61.2) is positioned in the driving cavity, and a spring is sleeved on the valve rod positioned in the driving cavity; an actuating valve sealing cover (61.3) is installed at the end part of the actuating cavity, and a foot control air inlet (61.5) is formed in the actuating valve sealing cover (61.3); a valve rod of the driving valve core (61.2) is provided with an air supply pipeline and an air exhaust pipeline; the valve body part comprises a valve body (61.6) and a valve core (61.7); the valve body (61.6) comprises a valve core cavity A, and the bottom of the valve core cavity A is provided with a through hole; the valve core (61.7) comprises a valve core rod (61.72) and a valve core cap (61.71) at the end part of the valve core rod, the valve core cap (61.71) is positioned in the valve core cavity A, the valve core rod (61.72) penetrates through the bottom of the valve core cavity A and is provided with a through hole, a spring is sleeved on a rod body of the valve core rod (61.72) positioned in the valve core cavity A, and a pipeline pressing block (61.8) is fixedly arranged at the end part of the valve core rod (61.72) extending out of the valve body (61.6); the pipeline pressing block (61.8) is positioned in the sliding guide groove (62.2).

4. Water supply system for dental chairs according to claim 3, characterised in that the bottom of the sliding channel (62.2) is shaped like a constriction; the end part of the pipeline pressing block (61.8) is matched with the bottom necking of the sliding guide groove (62.2) in shape.

5. The water supply system for the dental chair as claimed in claim 3, wherein the water pipe A (4) is embedded in the water pipe clamping groove (62.1).

6. The water supply system for dental chairs according to claim 3, characterised in that said water duct A (4) is also equipped with a flow regulating valve (7).

7. A water supply system for dental chairs as claimed in claims 1 or 3, characterised in that said water supply line further comprises a water delivery pipe B (5), the water delivery pipe B (5) being adapted to supply water to a three-way gun.

8. A water supply system for dental chairs as claimed in claim 1 or 3, characterised in that said water bag (3) is movably connected to the water supply line; the water outlet of the water bag (3) is provided with a connecting sleeve, the wall of the connecting sleeve is provided with a bayonet, the connecting section of the water supply pipeline is provided with a butt-joint connecting joint, and the connecting joint is inserted into the connecting sleeve and is fixed through a buckle (8).

9. The water supply system for dental chairs of claim 1, wherein the air-bag holder (1) comprises a lower water-bag holding tank and an upper air-bag fixing plate; the end part of the water bag placing groove is provided with a water pipe clamping groove; the air bag fixing plate is provided with an inflating nozzle mounting hole.

10. The use method of the water supply system of the dental chair is characterized in that the water supply system of the dental chair comprises an air bag (2) and a water bag (3) which are arranged in an air bag fixing seat (1), the air bag (2) is fixed on the air bag fixing seat (1), and the air bag (1) is connected with an air source; the water bag (3) is detachably arranged in a water bag placing groove of the air bag fixing seat (1), a water outlet of the water bag (3) is movably connected with a water supply pipeline, the water supply pipeline is divided into two water pipes, one water pipe A (4) for supplying water to the mobile phone, and the other water pipe B (5) for supplying water to the three-purpose gun; a waterway control valve (6) is installed on the water pipe A (4), and the water pipe A (4) is embedded in a water pipe clamping groove (62.1) of the water pipe seat (62); a normal air supply inlet (61.4) and a foot control air inlet (61.5) of the waterway control valve (6) are connected with an air source; the water delivery pipe A (4) is also provided with a flow regulating valve (7);

when the water bag is used, the water bag (3) is replaced firstly, the water conveying pipeline A (4) in the water supply pipeline is clamped and embedded into the water pipe clamping groove (62.1) of the water path control valve (6), the water conveying pipeline is connected with the water bag (3) in a plug-in mode and is fixed by the buckle (8), the end part of the water conveying pipeline A (4) is connected with a mobile phone, and the water conveying pipeline B (5) is connected with the three-purpose gun;

when the mobile phone does not need to supply water, the driving valve core (61.2) is propped to the top by the spring, normally supplied air enters the driving valve body seat (61.1) from the normally supplied air inlet (61.4) and then enters the cavity of the valve body (61.6), the valve core (61.7) is pushed downwards, the pipeline pressing block (61.8) extrudes and folds the water pipe A (4), and the water way output is blocked;

when the mobile phone needs to supply water; the pedal switch is stepped on, foot control gas enters an inner cavity of a driving valve core (61.2) from a foot control gas inlet (61.5), the driving valve core (61.2) moves towards the inner piston, a sealing ring on the driving valve core (61.2) disconnects a normally supplied gas inlet (61.4) from a cavity of a valve body (61.6), the cavity of the valve body (61.6) is communicated with a pressure relief gas outlet (61.9), air in the cavity of the valve body (61.6) is discharged from the pressure relief gas outlet (61.9), the valve core (61.7) is reset mechanically by a spring, a pipeline pressing block (61.8) is synchronously lifted and reset, a water conveying pipe A (4) is reset and conducted, and water supply is started.

Technical Field

The invention relates to a water supply system of a dental chair and a use method thereof, belonging to the technical field of water supply systems for dental chairs.

Background

In a dental clinic, a dental chair is necessary equipment, a necessary water supply system is arranged in accessory equipment of the dental chair, the existing water supply system is mainly fixed on the dental chair and can not be replaced, a dentist needs water to cool and flush in the process of operating various mobile phones for treating teeth, the dentist needs water to enter the oral cavity of a patient for treatment, and when the mobile phones stop rotating, the corresponding cooling water also stops being output. However, at this time, the turbine of the mobile phone is not completely static, cooling water can be sucked back into the pipeline, although the check valve is installed in the equipment to prevent the cooling water from being sucked back, the situation that no water is sucked back in the pipeline of the mobile phone tail line cannot be guaranteed by 100%. The mobile phone can be sterilized at high temperature, but the mobile phone pipeline cannot be sterilized at high temperature, and is not convenient to disassemble. This will cause that when the next patient is treated, the re-absorbed water for the previous patient will enter the oral cavity of the next patient, which is easy to cause cross infection. Therefore, it is necessary to design a dental chair water supply system which is convenient to replace.

Disclosure of Invention

Aiming at the defects in the prior art, a water supply system of the dental chair and a use method thereof are designed. The problem of cross infection which may exist is solved by replacing the water bag and the water conveying pipeline.

The invention solves the technical problems through the following technical scheme:

a water supply system of a dental chair comprises a water bag and a water supply pipeline connected with the water bag, and is characterized in that the water bag is detachably arranged in an air bag fixing seat, and the air bag is fixedly arranged in the air bag fixing seat; the water bag is squeezed by inflating the air bag, so that the water in the water bag is squeezed out.

The technical scheme has the advantages that: the water bag can be replaced, when different patients are treated, the water bag can be replaced, and an independent water bag can be provided for each patient, so that the probability of cross infection of the patients is reduced; the water bag is extruded in an air inflation mode through the air bag, the water outlet pressure can be guaranteed, the water bag can be conveniently replaced, when the water bag is replaced, the air pumping bag is contracted, the space in the air bag fixing seat is enlarged relatively, and the water bag is more conveniently replaced.

On the basis of the technical scheme, the inventor perfects and improves the technical scheme as follows:

further, the water outlet of the water bag is connected with a water supply pipeline, and the water supply pipeline is provided with at least one water delivery pipe A; and a waterway control valve is arranged on the pipeline on the water delivery pipe A. The water supply pipeline can be divided into a plurality of pipelines after being connected by the water outlet of the water bag.

The technical characteristics have the beneficial effects in the application that: because the water bag on the dental chair, the water source that its provided is used for different instruments, plays different usage, some need have the valve of control on the water pipe, some do not need, consequently, to installing the water route control valve who is used for control on the raceway A that needs the control valve, especially to the cell-phone that uses in the treatment, need utilize the cooperation of foot control, be through foot control come control water route control valve carry out work, realize the control to the rivers switch in raceway A.

Further, the waterway control valve comprises a driving valve body and a water pipe seat arranged at the end part of the driving valve body; the water pipe seat is provided with a water pipe clamping groove and a sliding guide groove vertical to the water pipe clamping groove; the water pipe clamping groove and the sliding guide groove are crossed; the drive valve body comprises a drive part and a valve body part; the driving part comprises a driving valve body seat, one end of the driving valve body seat is provided with a driving cavity, the bottom of the driving cavity is provided with a valve rod through hole, and the other end of the driving valve body seat is provided with a normal air supply inlet communicated with the valve rod through hole and a through hole communicated with the valve body part; the valve rod for driving the valve core is inserted into the valve rod through hole, the valve cap for driving the valve core is positioned in the driving cavity, and the valve rod positioned in the driving cavity is sleeved with a spring; a driving valve sealing cover is arranged at the end part of the driving cavity, and a foot control air inlet is formed in the driving valve sealing cover; the valve rod driving the valve core is provided with an air supply pipeline and an exhaust pipeline; the valve body part comprises a valve body and a valve core; the valve body comprises a valve core cavity A, and a through hole is formed in the bottom of the valve core cavity A; the valve core comprises a valve core rod and a valve core cap at the end part of the valve core rod, the valve core cap is positioned in the valve core cavity A, the valve core rod penetrates through the bottom of the valve core cavity A and is provided with a through hole, a spring is sleeved on a rod body of the valve core rod positioned in the valve core cavity A, and a pipeline pressing block is fixedly installed at the end part of the valve core rod extending out of the valve body; the pipeline pressing block is positioned in the sliding guide groove.

The technical characteristics have the beneficial effects in the application that: through the design to the specific structure of water route control valve, guarantee that water route control valve can realize cutting and opening the stream to raceway A strictly as required, the condition that overflows can not appear in the time of the cutout.

Furthermore, the bottom of the sliding guide groove is in a necking shape; the end shape of the pipeline pressing block is matched with the bottom necking of the sliding guide groove. The necking-down-shaped bottom of the sliding guide groove and the main body of the sliding guide groove are positioned at two sides of the water pipe clamping groove.

The technical characteristics have the beneficial effects in the application that: the structure can avoid damaging the water pipe while realizing the cut-off of the pipeline.

Furthermore, the water pipe A is embedded in the water pipe clamping groove.

The technical characteristics have the beneficial effects in the application that: the water delivery pipe A adopts an embedded mode, can be detached at any time and is convenient to replace. Therefore, the waterway control valve is fixed on the dental chair, and the water delivery pipe A is only required to be detached during replacement.

Furthermore, the water delivery pipe A is also provided with a flow regulating valve.

The technical characteristics have the beneficial effects in the application that: the flow regulating valve has the same structure as the regulating valve used on the infusion tube, is a groove-shaped U-shaped shell, and is provided with a roller, and the motion track of the shaft of the roller forms an included angle with the bottom of the groove.

Furthermore, the water supply pipeline also comprises a water conveying pipe B, and the water conveying pipe B is used for supplying water to the three-purpose gun.

The technical characteristics have the beneficial effects in the application that: according to the requirement, water pipes with different purposes are arranged at the water outlet of the water bag.

Further, the water bag is movably connected with the water supply pipeline; the water outlet of the water bag is provided with a connecting sleeve, the wall of the connecting sleeve is provided with a bayonet, the connecting section of the water supply pipeline is provided with a butt-joint connecting joint, and the connecting joint is inserted into the connecting sleeve and is fixed through a buckle. The connecting joint is provided with a sealing ring according to the requirement.

The technical characteristics have the beneficial effects in the application that: the water bag is connected with the water supply pipeline in a plug-in mounting mode and is fixed by the buckles, and the connection mode is simple and is favorable for quick assembly and disassembly.

Further, the air bag fixing seat comprises a lower water bag placing groove and an upper air bag fixing plate; the end part of the water bag placing groove is provided with a water pipe clamping groove; the air bag fixing plate is provided with an inflating nozzle mounting hole.

The technical characteristics have the beneficial effects in the application that: the airbag fixing seat is beneficial to replacing the water bag, and can be vertically placed or horizontally placed when being placed.

A corresponding method of operation is provided in the present application for the dental chair:

the use method of the water supply system of the dental chair is characterized in that the water supply system of the dental chair comprises an air bag and a water bag which are arranged in an air bag fixing seat, the air bag is fixed on the air bag fixing seat, and the air bag is connected with an air source; the water bag is detachably arranged in a water bag placing groove of the airbag fixing seat, a water outlet of the water bag is movably connected with a water supply pipeline, the water supply pipeline is divided into two water pipes, one water pipe A for supplying water to the mobile phone, and the other water pipe B for supplying water to the three-purpose gun; a waterway control valve is arranged on the water pipe A, and the water pipe A is embedded in a water pipe clamping groove of the water pipe seat; the constant air supply inlet and the foot control air inlet of the waterway control valve are connected with an air source; the water delivery pipe A is also provided with a flow regulating valve;

when the water bag is used, the water bag is replaced, the water conveying pipeline A in the water supply pipeline is clamped and embedded into the water pipe clamping groove of the water path control valve, the water conveying pipeline is connected with the water bag in a plug-in mode and fixed through a buckle, the end portion of the water conveying pipeline A is connected with a mobile phone, and the water conveying pipeline B is connected with the three-purpose gun;

when the mobile phone does not need to supply water, the driving valve core is propped to the top by the spring, normally supplied air enters the driving valve body seat from the normally supplied air inlet and then enters the valve body chamber, the valve core is pushed downwards, the pipeline pressing block extrudes and folds the water conveying pipe A, and the water way output is blocked;

when the mobile phone needs to supply water; the pedal switch is stepped on, foot control gas enters the inner cavity of the driving valve core through the foot control gas inlet, the driving valve core moves towards the piston, the sealing ring on the driving valve core disconnects the normally supplied gas inlet from the cavity of the valve body, the cavity of the valve body is communicated with the pressure relief gas outlet, air in the cavity of the valve body is discharged from the pressure relief gas outlet, the valve core is reset by a spring machine, the pipeline pressing block is synchronously lifted and reset, the water delivery pipe A is reset and conducted, and water supply is started.

The technical characteristics have the beneficial effects in the application that: through quick replacement water supply system, realize when different patients, use different supply channel and water bag, and in foretell use, through the control to the water route control valve, control entire system's water supply.

Drawings

FIG. 1 is a schematic view of a water supply system for a dental chair according to the present application;

FIG. 2 is a schematic perspective view of the waterway control valve;

FIG. 3 is a schematic perspective view of a water pipe socket;

FIG. 4 is a cross-sectional view of the waterway control valve;

FIG. 5 is a schematic perspective view of the valve core and the pipeline pressure block in an installed state;

FIG. 6 is a cross-sectional view of the valve body;

fig. 7 is a sectional view of the drive spool.

The reference numbers are recorded as follows: the air bag type water heater comprises an air bag fixing seat-1, an air bag-2, a water bag-3, a water delivery pipe A-4, a water delivery pipe B-5, a waterway control valve-6, a flow regulating valve-7 and a buckle-8;

the valve body-61 and the water pipe seat-62 are driven;

the valve comprises a driving valve body seat-61.1, a driving valve core-61.2, a driving valve sealing cover-61.3, a normal air supply inlet-61.4, a foot control air inlet-61.5, a valve body-61.6, a valve core-61.7, a pipeline pressing block-61.8 and a pressure relief air outlet-61.9;

valve core cap-61.71, valve core rod A-61.72, valve core cap sealing ring-61.73;

drives the valve core rod body-61.21 and drives the valve core rod cap-61.22.

Detailed Description

The following examples are only for illustrating the technical solutions described in the claims with reference to the drawings, and are not intended to limit the scope of the claims.

Example 1

With reference to fig. 1, a water supply system for a dental chair comprises a water bag 3 and a water supply pipeline connected with the water bag 3, wherein an airbag fixing seat 1 comprises a lower water bag placing groove and an upper airbag fixing plate; the end part of the water bag placing groove is provided with a water pipe clamping groove; the air bag fixing plate is provided with an inflating nozzle mounting hole, the water bag 3 is detachably mounted in the air bag fixing seat 1, and the air bag 2 is fixedly mounted in the air bag fixing seat 1; the water bag 3 is pressed by inflating the air bag 2, so that the water in the water bag 2 is squeezed out;

the water outlet of the water bag 3 is connected with a water supply pipeline, and the water supply pipeline is provided with at least one water delivery pipe A4; and a waterway control valve 6 is arranged on a pipeline on the water conveying pipe A4.

Example 2

On the basis of the embodiment 1, in combination with the attached figures 2-7,

wherein, the waterway control valve 6 comprises a driving valve body 61 and a water pipe seat 62 arranged at the end part of the driving valve body 61; the water pipe seat 62 is provided with a water pipe clamping groove 62.1 and a sliding guide groove 62.2 vertical to the water pipe clamping groove 62.1; the water pipe clamping groove 62.1 and the sliding guide groove 62.2 are crossed; the drive valve body 61 includes a drive portion and a valve body portion; the driving part comprises a driving valve body seat 61.1, one end of the driving valve body seat 61.1 is provided with a driving cavity, the bottom of the driving cavity is provided with a valve rod through hole, and the other end of the driving valve body seat 61.1 is provided with a normal air supply inlet 61.4 communicated with the valve rod through hole and a through hole communicated with the valve body part; a valve rod driving the valve core 61.2 is inserted into the valve rod through hole, a valve cap driving the valve core 61.2 is positioned in the driving cavity, and a spring is sleeved on the valve rod positioned in the driving cavity; an actuating valve sealing cover 61.3 is installed at the end part of the actuating cavity, and a foot control air inlet 61.5 is formed in the actuating valve sealing cover 61.3; a valve rod driving the valve core 61.2 is provided with an air supply pipeline and an air exhaust pipeline; the valve body part comprises a valve body 61.6 and a valve core 61.7; the valve body 61.6 comprises a valve core cavity A, and the bottom of the valve core cavity A is provided with a through hole; the valve core 61.7 comprises a valve core rod 61.72 and a valve core cap 61.71 at the end part of the valve core rod, the valve core cap 61.71 is positioned in the valve core cavity A, the valve core rod 61.72 penetrates through the bottom of the valve core cavity A and is provided with a through hole, a spring is sleeved on a rod body of the valve core rod 61.72 positioned in the valve core cavity A, and a pipeline pressing block 61.8 is fixedly arranged at the end part of the valve core rod 61.72 extending out of the valve body 61.6; the pipeline pressing block 61.8 is positioned in the sliding guide groove 62.2.

Wherein the bottom of the sliding guide groove 62.2 is in a necking shape; the end part of the pipeline pressing block 61.8 is matched with the bottom necking of the sliding guide groove 62.2 in shape; the necking-shaped bottom and other parts of the sliding guide groove are positioned at two sides of the water pipe clamping groove; the water pipe A4 is embedded in the water pipe clamping groove 62.1; a flow regulating valve 7 is also arranged on the water delivery pipe A4.

Example 3

On the basis of the embodiment 1 or 2,

the water supply pipeline also comprises a water conveying pipe B5, and the water conveying pipeline B5 is used for supplying water to the three-purpose gun;

the water bag 3 is movably connected with the water supply pipeline; the water outlet of the water bag 3 is provided with a connecting sleeve, the wall of the connecting sleeve is provided with a bayonet, the connecting section of the water supply pipeline is provided with a butt-joint connecting joint, and the connecting joint is inserted into the connecting sleeve and is fixed through a buckle 8.

In addition, the application also relates to a using method of the water supply system, which comprises the following steps:

a method for using a water supply system of a dental chair comprises an air bag 2 and a water bag 3 which are arranged in an air bag fixing seat 1, wherein the air bag 2 is fixed on the air bag fixing seat 1, and the air bag 1 is connected with an air source; the water bag 3 is detachably arranged in the water bag placing groove of the airbag fixing seat 1, when a patient uses the water bag, the water bag can be detached and replaced by another new water bag, the water outlet of the water bag 3 is movably connected with a water supply pipeline, the water supply pipeline is divided into two water pipes, one water pipe is a water pipe A4 for supplying water to a mobile phone, and the other water pipe is a water pipe B5 for supplying water to a three-purpose gun; the water pipe A4 is provided with a waterway control valve 6, and the water pipe A4 is embedded in the water pipe clamping groove 62.1 of the water pipe seat 62; the normal air supply inlet 61.4 and the foot control air inlet 61.5 of the water path control valve 6 are connected with an air source; the water delivery pipe A4 is also provided with a flow regulating valve 7; when the water bag is replaced, the water supply pipeline can be replaced together, because the water supply pipeline is embedded and clamped in the water path control valve which is fixed on the dental chair, the water pipe can be detached from the water path control valve only by applying a little force;

when the water bag is used, the water bag 3 is replaced, the water conveying pipeline A4 in the water supply pipeline is clamped and embedded into the water pipe clamping groove 62.1 of the water path control valve 6, the water conveying pipeline is connected with the water bag 3 in a plug-in mode and is fixed by the buckle 8, the end part of the water conveying pipeline A4 is connected with a mobile phone, and the water conveying pipeline B5 is connected with the three-purpose gun;

when the mobile phone does not need to supply water, the driving valve core 61.2 is propped to the top by the spring, normally supplied air enters the driving valve body seat 61.1 from the normally supplied air inlet 61.4 and then enters the cavity of the valve body 61.6, the valve core 61.7 is pushed downwards, the pipeline press block 61.8 extrudes and folds the water pipe A4, and the water way output is blocked;

when the mobile phone needs to supply water; the pedal switch is stepped on, foot control gas enters the inner cavity of the driving valve core 61.2 from the foot control gas inlet 61.5, the driving valve core 61.2 moves towards the inner piston, a sealing ring on the driving valve core 61.2 disconnects the normally supplied gas inlet 61.4 from the cavity of the valve body 61.6, the cavity of the valve body 61.6 is communicated with the pressure relief gas outlet 61.9, air in the cavity of the valve body 61.6 is discharged from the pressure relief gas outlet 61.9, the valve core 61.7 is reset mechanically by a spring, the pipeline pressing block 61.8 is synchronously lifted and reset, the water delivery pipe A4 is reset and conducted, and water supply is started.

The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents, improvements and the like that fall within the spirit and principle of the present invention are intended to be included therein.

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