阅读说明：本技术 一种手术室专用护理杀菌装置 (Special nursing sterilizing equipment of operating room ) 是由 彭海静 付海芹 秦美丽 于 2020-07-06 设计创作，主要内容包括：本发明公开了一种手术室专用护理杀菌装置,包括空气净化器和除湿箱,所述空气净化器和除湿箱的下表面固定连接有进气装置,所述进气装置包括箱体,所述箱体的上表面与空气净化器和除湿箱的下表面固定连接,所述箱体的右侧固定连接有电机,所述电机上输出轴的左端固定连接有转轴,所述转轴的左端固定连接有圆盘,所述圆盘的左侧固定连接有弧形齿板。本发明,通过上述结构之间的配合使用,解决了在实际使用过程中,由于传统轴流风机在运行时会产生大量的噪音,且产生的压力差难以引导气体与消毒液进行充分混合,对空气中的细菌微生物进行充分的灭杀操作,给使用带来不便,降低了工作效率的问题。(The invention discloses a special nursing and sterilizing device for an operating room, which comprises an air purifier and a dehumidifying box, wherein the lower surfaces of the air purifier and the dehumidifying box are fixedly connected with an air inlet device, the air inlet device comprises a box body, the upper surface of the box body is fixedly connected with the lower surfaces of the air purifier and the dehumidifying box, the right side of the box body is fixedly connected with a motor, the left end of an output shaft on the motor is fixedly connected with a rotating shaft, the left end of the rotating shaft is fixedly connected with a disc, and the left side of the disc is fixedly connected with an arc toothed plate. The invention solves the problems that in the actual use process, because the traditional axial flow fan generates a large amount of noise during operation, and the generated pressure difference is difficult to guide the gas and the disinfectant to be fully mixed, the bacteria and the microorganisms in the air are fully killed, the use is inconvenient, and the working efficiency is reduced.)

1. The utility model provides a special nursing sterilizing equipment of operating room, includes air purifier (1) and dehumidification case (2), its characterized in that: the lower surfaces of the air purifier (1) and the dehumidification box (2) are fixedly connected with an air inlet device (3);

the air inlet device (3) comprises a box body (4), the upper surface of the box body (4) is fixedly connected with the lower surfaces of the air purifier (1) and the dehumidification box (2), the right side of the box body (4) is fixedly connected with a motor (5), the left end of an output shaft on the motor (5) is fixedly connected with a rotating shaft (6), the left end of the rotating shaft (6) is fixedly connected with a disc (7), the left side of the disc (7) is fixedly connected with an arc-shaped toothed plate (8), the inner wall of the box body (4) rotates in a limiting mode to form a cylindrical shell (9), the surface of the cylindrical shell (9) is fixedly connected with two first gears (10), the surfaces of the first gears (10) are meshed with teeth on the arc-shaped toothed plate (8), the surface of the cylindrical shell (9) is fixedly connected with a second gear (11), and the rear side of the second gear (11) is meshed with a, the inner wall of the box body (4) is fixedly connected with a sleeve (13), the surface of the toothed plate (12) is in sliding connection with the inner wall of the sleeve (13), the box body (4) is provided with an air inlet shell (14) by the inner wall fixedly connected with the left side, the right side of the air inlet shell (14) is provided with a through hole and is fixedly connected with a connecting pipe (15) by the through hole, the inner wall of the connecting pipe (15) is in sliding connection with a piston plate (16), the right side of the piston plate (16) is fixedly connected with the left end of the toothed plate (12), the left side of the air inlet shell (14) is provided with a through hole and is fixedly connected with a one-way exhaust valve (17) by the through hole, the inner wall of the air inlet shell (14) is fixedly connected with a one-way exhaust valve (18), the right side of the air inlet shell (14) is provided with a through hole and is fixedly connected with, and a disinfection device (20) is fixedly connected to the lower surface of the box body (4).

2. The special nursing and sterilizing device for the operating room as claimed in claim 1, wherein: degassing unit (20) includes liquid storage bucket (21), the top of liquid storage bucket (21) and the lower fixed surface of box (4) are connected, the antiseptic solution is equipped with in liquid storage bucket (21), the surface of cylindricality casing (9) runs through box (4) and rotates with box (4) and is connected, the surface that is close to the bottom on cylindricality casing (9) has seted up the through-hole and has been connected with air duct (22) through-hole fixedly connected with, the micropore has been seted up to the upper surface of air duct (22), the through-hole has been seted up and has been connected with auxiliary device (23) through-hole fixedly connected with on the right side of liquid storage bucket (21).

3. The special nursing and sterilizing device for the operating room as claimed in claim 2, wherein: auxiliary device (23) is including pipe one (24), the inner wall fixed connection of through-hole on the left end of pipe one (24) and stock solution bucket (21) right side, the fixed surface of motor (5) is covered with heating shell (25), the top of pipe one (24) run through the lower surface of heating shell (25) and with heating shell (25) fixed connection, the through-hole has been seted up to the upper surface of heating shell (25) and through-hole fixedly connected with pipe two (26), keep away from the one end of heating shell (25) and the air inlet fixed connection of air purifier (1) on pipe two (26).

4. The special nursing and sterilizing device for the operating room as claimed in claim 3, wherein: the left side fixedly connected with link (27) of heating shell (25), the right side fixed connection of the left end and box (4) of link (27).

5. The special nursing and sterilizing device for the operating room as claimed in claim 1, wherein: the surface of the cylindrical shell (9) is fixedly connected with two limiting rings (28), and the opposite surfaces of the two limiting rings (28) are rotatably connected with the inner wall of the box body (4) and the lower surface of the box body (4).

6. The special nursing and sterilizing device for the operating room as claimed in claim 1, wherein: the number of the toothed plates (12) is two, and the two toothed plates (12) are symmetrically arranged by using the horizontal center line of the box body (4).

7. The special nursing and sterilizing device for the operating room as claimed in claim 1, wherein: the inner wall of the air inlet shell (14) is fixedly connected with a filter screen (29).

Technical Field

The invention relates to the technical field of medical sterilization equipment, in particular to a special nursing sterilization device for an operating room.

Background

In the nursing process of an operating room, the cleanliness of air is the primary consideration factor of the operating room, so that the air in the operating room needs to be sterilized and exchanged in time, but the traditional sterilizing device has many problems, the structure is complex, the popularity is not high, the installation and the use are inconvenient, great troubles are brought to the use of a user, the indoor air can not quickly and efficiently enter the inside of a sterilizing box, the sterilizing efficiency is low, the purifying degree is not enough, multi-level sterilizing and disinfecting treatment can not be realized, the sterilized air is directly discharged outdoors without being dehumidified, the breathing health of personnel is influenced by high humidity, the nursing burden of the personnel is invisibly increased, the sterilizing and disinfecting quality is difficult to ensure, the using efficiency of the sterilizing device is low, and the sterilizing device is provided for the purpose, for example, the special nursing and sterilizing device for the operating room disclosed by the Chinese patent CN109529089A, and comprises a bottom plate, the upper end of the bottom plate is provided with the disinfection box, a cylinder is arranged at the middle circular hole of the front end of the disinfection box, a filter screen is arranged at the front end of the cylinder, a drainage device is arranged in the cylinder of the cylinder, the cylinder is communicated with the disinfection box, a conical air pipe is arranged on the front side wall in the disinfection box, and the moisture absorption operation of the box body is realized through a dehumidification device, so that the nursing burden of personnel is reduced, the sterilization quality is ensured, and the use efficiency of the sterilization device is improved;

however, in the actual use process, because the axial flow fan can generate a large amount of noise during operation, and the generated pressure difference is difficult to guide the gas and the disinfectant to be fully mixed, the bacteria and microorganisms in the air are fully killed, so that inconvenience is brought to use, and the working efficiency is reduced.

Disclosure of Invention

The invention aims to provide a special nursing and sterilizing device for an operating room, which improves the traditional device and solves the problems in the background technology.

In order to achieve the purpose, the invention provides the following technical scheme: the utility model provides a special nursing sterilizing equipment of operating room, includes air purifier and dehumidification case, the lower fixed surface of air purifier and dehumidification case is connected with air inlet unit.

The air inlet device comprises a box body, the upper surface of the box body is fixedly connected with the lower surfaces of an air purifier and a dehumidifying box, the right side of the box body is fixedly connected with a motor, the left end of an output shaft on the motor is fixedly connected with a rotating shaft, the left end of the rotating shaft is fixedly connected with a disc, the left side of the disc is fixedly connected with an arc toothed plate, the inner wall of the box body is limited to rotate to form a cylindrical shell, the surface of the cylindrical shell is fixedly connected with two first gears, the surface of the first gears is meshed with teeth on the arc toothed plate, the surface of the cylindrical shell is fixedly connected with a second gear, the rear side of the second gear is meshed with the toothed plate, the inner wall of the box body is fixedly connected with a sleeve, the surface of the toothed plate is slidably connected with the inner wall of the sleeve, the box body is fixedly connected with an air inlet shell by, the inner wall sliding connection of connecting pipe has the piston board, the right side of piston board and the left end fixed connection of pinion rack, the through-hole has been seted up and has been passed through-hole fixedly connected with one-way discharge valve one in the left side of the shell that admits air, the one-way discharge valve two of inner wall fixedly connected with of the shell that admits air, the through-hole has been seted up and has been passed through-hole fixedly connected with hose on the right side of the shell that admits air, the right-hand member of hose run through the cylindricality casing and with cylindricality.

Preferably, degassing unit includes the stock solution bucket, the top of stock solution bucket and the lower fixed surface of box are connected, the antiseptic solution is equipped with in the stock solution bucket, the surface of cylindricality casing runs through the box and rotates with the box to be connected, the surface that is close to the bottom on the cylindricality casing has seted up the through-hole and has passed through-hole fixedly connected with air duct, the micropore has been seted up to the upper surface of air duct, the through-hole has been seted up on the right side of stock solution bucket and has passed through-hole fixedly connected with auxiliary device.

Preferably, auxiliary device includes pipe one, the inner wall fixed connection of through-hole on the left end of pipe one and the stock solution bucket right side, the fixed surface of motor is covered with the heating shell, the top of pipe one run through the lower surface of heating shell and with heating shell fixed connection, the through-hole has been seted up to the upper surface of heating shell and through-hole fixedly connected with pipe two, keep away from the one end of heating shell and air purifier's air inlet fixed connection on the pipe two.

Preferably, the left side fixedly connected with link of heating shell, the left end of link and the right side fixed connection of box.

Preferably, the surface of the cylindrical shell is fixedly connected with two limiting rings, and opposite surfaces of the two limiting rings are rotatably connected with the inner wall of the box body and the lower surface of the box body.

Preferably, the number of the toothed plates is two, and the two toothed plates are symmetrically arranged by using the horizontal center line of the box body.

Preferably, the inner wall of the air inlet shell is fixedly connected with a filter screen.

Compared with the prior art, the invention has the following beneficial effects:

the air inlet device is arranged, so that the integrated operation of air suction, air and disinfectant mixing and final air transmission can be realized, the noise is lower, the air and the disinfectant can be fully mixed, and the working efficiency is improved;

after the motor is connected with a power supply and the switch is turned on, the output shaft on the motor drives the rotating shaft to rotate, and synchronous rotation of the discs is realized through transmission of the rotating shaft, so that rotation of the arc toothed plate is realized;

after the arc toothed plate rotates, teeth on the arc toothed plate are meshed with teeth on the first gear, and the gears drive the cylindrical shell to rotate in the box body for a while under the rotating guide of the arc toothed plate, and the two gears on the cylindrical shell are meshed with the arc toothed plate for a while alternately, so that the cylindrical shell rotates on the box body in a reciprocating mode;

the second gear on the cylindrical shell synchronously rotates in a reciprocating mode along with the second gear, the toothed plate meshed with the second gear moves in a reciprocating mode left and right along with the second gear, and the moving track of the toothed plate is limited through the sleeve, so that the stability of the left and right reciprocating movement of the toothed plate is guaranteed;

the piston plate can move in a left-right reciprocating mode in the connecting pipe through the transmission of the toothed plate, the air inlet shell is divided into A, B two spaces through a one-way exhaust valve II, the large space is called A, and the small space is called B; when the piston plate moves leftwards in the connecting pipe, the air pressure in the A is increased, high-pressure air enters the B through the one-way exhaust valve II, then the high-pressure air in the B enters the cylindrical shell through the hose and is finally guided downwards through the cylindrical shell, so that the air enters disinfectant and is mixed with the disinfectant;

when the piston plate moves rightwards in the connecting pipe, the volume in the A is increased, the air pressure is reduced, external air enters the A through the first one-way exhaust valve, then the air in the A is compressed into the B along with the leftward movement of the piston plate, so that the suction and transfer of outside air are completed, and the air sterilization operation is finally realized;

through the arrangement of the disinfection device, the air and the disinfectant can be fully mixed, and the disinfected air is transmitted, passes through the air purifier and the dehumidification box and can be finally discharged;

by the cooperation of the structures, the problems that in the actual use process, a large amount of noise is generated when the traditional axial flow fan runs, and the generated pressure difference is difficult to guide gas and disinfectant to be fully mixed, so that bacteria and microorganisms in the air are fully killed, inconvenience is brought to use, and the working efficiency is reduced are solved.

Drawings

FIG. 1 is a schematic structural view of the present invention;

FIG. 2 is a front cross-sectional view of the case of the present invention;

fig. 3 is a left side view of the disc of the present invention.

In the figure: the air purifier comprises a 1-air purifier, a 2-dehumidification box, a 3-air inlet device, a 4-box body, a 5-motor, a 6-rotating shaft, a 7-round disc, an 8-arc toothed plate, a 9-cylindrical shell, a 10-gear I, a 11-gear II, a 12-toothed plate, a 13-sleeve, a 14-air inlet shell, a 15-connecting pipe, a 16-piston plate, a 17-one-way exhaust valve I, a 18-one-way exhaust valve II, a 19-hose, a 20-disinfection device, a 21-liquid storage barrel, a 22-air guide pipe, a 23-auxiliary device, a 24-pipe I, a 25-heating shell, a 26-pipe II, a 27-connecting frame, a 28-limiting ring and a 29-filter screen.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

Referring to fig. 1 to 3, the present invention provides a technical solution: a special nursing and sterilizing device for an operating room comprises an air purifier 1 and a dehumidifying box 2, wherein multi-level sterilization and disinfection treatment of gas is realized by matching with the air purifier 1, a bagged drying agent on a perforated plate in the dehumidifying box 2 can realize the moisture absorption operation of the gas, the lower surfaces of the air purifier 1 and the dehumidifying box 2 are fixedly connected with an air inlet device 3, the air inlet device 3 is arranged, the integrated operation of air suction, air and disinfectant mixing and final air transmission can be realized, the noise is lower, the air and disinfectant can be fully mixed, and the working efficiency is improved;

the air inlet device 3 comprises a box body 4, the upper surface of the box body 4 is fixedly connected with the lower surfaces of the air purifier 1 and the dehumidifying box 2, the right side of the box body 4 is fixedly connected with a motor 5, the left end of an output shaft on the motor 5 is fixedly connected with a rotating shaft 6, the left end of the rotating shaft 6 is fixedly connected with a disc 7, the left side of the disc 7 is fixedly connected with an arc-shaped toothed plate 8, after the motor 5 is powered on and a switch is turned on, the output shaft on the disc drives the rotating shaft 6 to rotate, and the synchronous rotation of the disc 7 is realized through the transmission of the rotating shaft 6, so that;

the inner wall of the box body 4 is limited to rotate to form a cylindrical shell 9, the surface of the cylindrical shell 9 is fixedly connected with two first gears 10, the surfaces of the first gears 10 are meshed with teeth on the arc toothed plate 8, after the arc toothed plate 8 rotates, the teeth on the arc toothed plate 8 are meshed with the teeth on the first gears 10, and the first gears 10 drive the cylindrical shell 9 to rotate in the box body 4 under the guide of the rotation of the arc toothed plate 8, and the two first gears 10 on the cylindrical shell 9 are alternately meshed with the arc toothed plate 8, so that the cylindrical shell 9 rotates on the box body 4 in a reciprocating mode;

the surface of the cylindrical shell 9 is fixedly connected with a second gear 11, the rear side of the second gear 11 is meshed with two toothed plates 12, the number of the toothed plates 12 is two, the two toothed plates 12 are symmetrically arranged along the horizontal center line of the box body 4, and the two toothed plates 12 correspond to the two air inlet shells 14, the connecting pipe 15, the piston plate 16, the one-way exhaust valve I17, the one-way exhaust valve II 18 and the hose 19, so that the air inlet efficiency can be improved;

the inner wall of the box body 4 is fixedly connected with a sleeve 13, the surface of the toothed plate 12 is in sliding connection with the inner wall of the sleeve 13, the gear II 11 on the cylindrical shell 9 synchronously performs reciprocating rotation along with the sleeve, the toothed plate 12 meshed with the gear II 11 performs reciprocating movement left and right along with the sleeve, the sleeve 13 limits the movement track of the toothed plate 12, and the stability of the reciprocating movement left and right is ensured;

the inner wall of the box body 4 close to the left side is fixedly connected with an air inlet shell 14, the inner wall of the air inlet shell 14 is fixedly connected with a filter screen 29, and air absorbed into the air inlet shell 14 from the outside can be filtered through the arrangement of a hose 19, so that dust impurities in the air can be filtered;

the right side of the air inlet shell 14 is provided with a through hole and is fixedly connected with a connecting pipe 15 through the through hole, the inner wall of the connecting pipe 15 is connected with a piston plate 16 in a sliding manner, the right side of the piston plate 16 is fixedly connected with the left end of the toothed plate 12, the left side of the air inlet shell 14 is provided with a through hole and is fixedly connected with a one-way exhaust valve 17 through the through hole, the inner wall of the air inlet shell 14 is fixedly connected with a one-way exhaust valve II 18, the right side of the air inlet shell 14 is provided with a through hole and is fixedly connected with a hose 19 through the through hole, the right end of the hose 19 penetrates through the cylindrical shell 9 and is fixedly connected with the cylindrical shell 9, the piston plate 16 can perform left-right reciprocating movement in the connecting pipe 15 through the transmission of the; when the piston plate 16 moves leftwards in the connecting pipe 15, the air pressure in the A is increased, high-pressure air enters the B through the one-way exhaust valve II 18, then the high-pressure air in the B enters the cylindrical shell 9 through the hose 19, and finally the high-pressure air is guided downwards through the cylindrical shell 9, so that the air enters disinfectant and is mixed with the disinfectant; when the piston plate 16 moves to the right in the connecting pipe 15, the volume in the A is increased, the air pressure is reduced, external air enters the A through the one-way exhaust valve I17, then the air in the A is compressed into the B along with the left movement of the piston plate 16, so that the suction and the transfer of the outside air are completed, and the air sterilization operation is finally realized;

the type of the one-way exhaust valve I17 and the type of the one-way exhaust valve II 18 are V1 type exhaust valves;

the lower fixed surface of box 4 is connected with degassing unit 20, through degassing unit 20's setting, can realize the intensive mixing of air and antiseptic solution, and the air after the disinfection is through the transmission, through air purifier 1 and dehumidification case 2, finally can discharge outward.

The disinfection device 20 comprises a liquid storage barrel 21, the top of the liquid storage barrel 21 is fixedly connected with the lower surface of the box body 4, disinfectant is filled in the liquid storage barrel 21, the surface of the cylindrical shell 9 penetrates through the box body 4 and is rotatably connected with the box body 4, two limiting rings 28 are fixedly connected with the surface of the cylindrical shell 9, opposite surfaces of the two limiting rings 28 are rotatably connected with the inner wall of the box body 4 and the lower surface of the box body 4, and the stability of limiting rotation of the cylindrical shell 9 on the box body 4 is further ensured by the arrangement of the two limiting rings 28 on the cylindrical shell 9, so that the cylindrical shell 9 is prevented from moving up and down when rotating;

when the sterilizing device is used, air absorbed by the outside enters the air guide tube 22 through the cylindrical shell 9 and is then sprayed out from the through hole in the upper surface of the air guide tube 22, the sprayed air can be mixed with disinfectant in the liquid storage barrel 21, and meanwhile, along with the reciprocating rotation of the cylindrical shell 9, the air guide tube 22 can also rotate in a reciprocating manner along with the cylindrical shell 9, so that the gas sprayed out of the micropores can be fully mixed with the disinfectant, and the sterilizing efficiency of bacterial microorganisms in the air is improved;

the auxiliary device 23 comprises a first pipe 24, the left end of the first pipe 24 is fixedly connected with the inner wall of the through hole on the right side of the liquid storage barrel 21, the surface of the motor 5 is fixedly covered with a heating shell 25, the top of the first pipe 24 penetrates through the lower surface of the heating shell 25 and is fixedly connected with the heating shell 25, the upper surface of the heating shell 25 is provided with a through hole and is fixedly connected with a second pipe 26 through the through hole, one end of the second pipe 26 far away from the heating shell 25 is fixedly connected with an air inlet of the air purifier 1, air in the disinfectant of the liquid storage barrel 21 finally rises, then the first pipe 24, the heating shell 25 and the second pipe 26 are transmitted to finally enable the air to enter the air purifier 1, in the heating shell 25, because the motor 5 can generate a large amount of heat during operation, the air in the heating shell 25 can absorb the heat, on the one hand, the operation stability of the motor 5 is reduced, the work efficiency is ensured, on, reduce the moisture carried by the air when being discharged;

the connecting frame 27 is fixedly connected to the left side of the heating shell 25, the left end of the connecting frame 27 is fixedly connected with the right side of the box body 4, and the heating shell 25 can be reinforced in installation and use through the connecting frame 27 arranged on the heating shell 25, so that the heating shell 25 is prevented from shaking in use, and the stability in use is ensured;

the working principle is as follows: when the special nursing and sterilizing device for the operating room is used, the air suction device 3 is arranged, the air suction, the mixing of the air and the sterilizing liquid and the final transmission of the air can be integrally operated, the noise is lower, the air and the sterilizing liquid can be fully mixed, and the working efficiency is improved; after the motor 5 is powered on and the switch is turned on, an output shaft on the motor drives the rotating shaft 6 to rotate, and the synchronous rotation of the disc 7 and the rotation of the arc toothed plate 8 are realized through the transmission of the rotating shaft 6; after the arc toothed plate 8 rotates, teeth on the arc toothed plate 8 are meshed with teeth on the first gear 10, and the first gear 10 drives the cylindrical shell 9 to rotate in the box body 4 under the guidance of the rotation of the arc toothed plate 8, and the two first gears 10 on the cylindrical shell 9 are alternately meshed with the arc toothed plate 8, so that the cylindrical shell 9 rotates on the box body 4 in a reciprocating manner; the second gear 11 on the cylindrical shell 9 synchronously rotates in a reciprocating manner, the toothed plate 12 meshed with the second gear 11 moves in a reciprocating manner from left to right, the moving track of the toothed plate 12 is limited through the sleeve 13, and the stability of the left and right reciprocating movement of the toothed plate 12 is ensured; through the transmission of the toothed plate 12, the piston plate 16 can move in a left-right reciprocating manner in the connecting pipe 15, and the air inlet shell 14 is divided into A, B two spaces by the one-way exhaust valve II 18, wherein the large space is called A, and the small space is called B; when the piston plate 16 moves leftwards in the connecting pipe 15, the air pressure in the A is increased, high-pressure air enters the B through the one-way exhaust valve II 18, then the high-pressure air in the B enters the cylindrical shell 9 through the hose 19, and finally the high-pressure air is guided downwards through the cylindrical shell 9, so that the air enters disinfectant and is mixed with the disinfectant; when the piston plate 16 moves to the right in the connecting pipe 15, the volume in the A is increased, the air pressure is reduced, external air enters the A through the one-way exhaust valve I17, then the air in the A is compressed into the B along with the left movement of the piston plate 16, so that the suction and the transfer of the outside air are completed, and the air sterilization operation is finally realized; through the arrangement of the disinfection device 20, the air and the disinfection solution can be fully mixed, and the disinfected air is transmitted to pass through the air purifier 1 and the dehumidification box 2 and finally can be discharged; through the cooperation use between the above-mentioned structure, solved in the in-service use process, because traditional axial fan can produce a large amount of noises when moving, and the pressure differential that produces is difficult to guide gaseous and antiseptic solution to carry out intensive mixing, carries out abundant killing operation to the bacterial microorganism in the air, brings inconvenience for the use, has reduced work efficiency's problem.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.