阅读说明：本技术 一种肿瘤内科灌注化疗配药装置 (Medical oncology fills chemotherapy dispensing device ) 是由 顾术东 张曙 王燕 于 2019-10-23 设计创作，主要内容包括：本发明公开了一种肿瘤内科灌注化疗配药装置,包括箱体,箱体内壁相对的两侧之间固定连接有支撑板,支撑板顶部一侧固定连接有混合箱,支撑板的顶部一侧固定连接有支撑座,支撑座的顶部通过伸缩杆固定连接有底板,底板的顶部两侧均竖直固定连接有竖板,竖板相对的两侧均固定连接有卡块,箱体内壁底部依次固定连接有第一泵体、第二泵体,本发明涉及肿瘤内科用具技术领域。该种肿瘤内科灌注化疗配药装置,解决了搅拌棒进行搅拌配制,在配制过程中药物与空气接触会产生一定的反应,使得配药效果不好,同时现有的容器配药通过搅拌棒进行搅拌,使得在搅拌过程中有大量的抗癌药沉淀在容器的底部,影响化疗药物配制效果,同时搅拌不均匀的问题。(The invention discloses a perfusion chemotherapy dispensing device for medical oncology, which comprises a box body, wherein a supporting plate is fixedly connected between two opposite sides of the inner wall of the box body, a mixing box is fixedly connected to one side of the top of the supporting plate, a supporting seat is fixedly connected to one side of the top of the supporting plate, the top of the supporting seat is fixedly connected with a bottom plate through a telescopic rod, vertical plates are vertically and fixedly connected to two sides of the top of the bottom plate, clamping blocks are fixedly connected to two opposite sides of each vertical plate, and a first pump body and a second pump body are sequentially and fixedly connected to the bottom of the inner. This kind of medical oncology fills chemotherapy dispensing device has solved the stirring rod and has stirred the preparation, and medicine and air contact can produce certain reaction in the preparation process for the effect of dispensing is not good, and current container dispenses simultaneously and stirs through the stirring rod, makes and has a large amount of anticancer drugs to deposit in the bottom of container at the stirring in-process, influences chemotherapy medicine and prepares the effect, stirs inhomogeneous problem simultaneously.)

1. At a medical oncology perfusion chemotherapy dispensing device, including box (1), its characterized in that: the improved mixing box is characterized in that a supporting plate (2) is fixedly connected between two opposite sides of the inner wall of the box body (1), a mixing box (3) is fixedly connected to one side of the top of the supporting plate (2), the bottom of the supporting plate (2) is fixedly connected with a motor fixing frame (4) corresponding to the mixing box (3), a stirring motor (5) is fixedly connected to the center of the motor fixing frame (4), the output shaft end of the stirring motor (5) sequentially penetrates through the supporting plate (2) and the mixing box (3) and extends into the mixing box (3), one end of the output shaft end of the stirring motor (5) extends into a stirring sheet (6) fixedly connected with the inside of the mixing box (3), a supporting seat (7) is fixedly connected to one side of the top of the supporting plate (2) close to the mixing box (3), and a bottom plate (9) is fixedly connected to the top of, the improved structure of the liquid pump comprises a bottom plate (9), a vertical plate (10) is fixedly connected to the two sides of the top of the bottom plate (9) in a vertical mode, a clamping block (11) is fixedly connected to the two opposite sides of the vertical plate (10), a vibration motor (12) is fixedly connected to one side of the vertical plate (10), an eccentric wheel (13) is fixedly connected to the output shaft of the vibration motor (12), a first pump body (14) is fixedly connected to one side of the bottom of the inner wall of a box body (1), a first liquid inlet pipe (15) is communicated with the inlet end of the first pump body (14), a connecting seat (16) is fixedly connected to the top of the bottom plate (9), one end of the first liquid inlet pipe (15) is communicated with the connecting seat (16), a first puncture needle (17) is connected to the top of the connecting seat (16) in a threaded mode, a first liquid pipe (18) is communicated with the outlet end of the, the one end of second liquid pipe (20) and the top intercommunication of mixing box (3) one side, the bottom fixedly connected with second pump body (21) of box (1) inner wall, the entrance point intercommunication of the second pump body (21) has second feed liquor pipe (22), the one end and the mixing box (3) inner wall bottom intercommunication of second feed liquor pipe (22), backup pad (2) top one side fixedly connected with elevating gear (23), the exit end intercommunication of the second pump body (21) has third liquid pipe (24), the one end and the elevating gear (23) intercommunication of third liquid pipe (24), the bottom of elevating gear (23) runs through the top of backup pad (2) and extends to the bottom of backup pad (2), one end fixedly connected with second felting needle (25) that elevating gear (23) extend to backup pad (2) bottom.

2. The perfusion chemotherapy dispensing device for oncology according to claim 1, wherein: the other end intercommunication of tee bend tube head (19) has fourth liquid pipe (26), the one end of fourth liquid pipe (26) runs through box (1) inner wall and extends to box (1) outside, the surface intercommunication of fourth liquid pipe (26) has first solenoid valve (27), the surface intercommunication of second liquid pipe (20) has second solenoid valve (28), box (1) inner wall bottom one side fixedly connected with controller (29).

3. The perfusion chemotherapy dispensing device for oncology according to claim 1, wherein: the surface fixed connection who just is located telescopic link (8) between the top of supporting seat (7) and the bottom of bottom plate (9) has first spring (30), fixedly connected with second spring (31) between one side of riser (10) and box (1) inner wall.

4. The perfusion chemotherapy dispensing device for oncology according to claim 1, wherein: the lifting device (23) comprises a fixed box (231), an electric telescopic rod (232) is fixedly connected to the top of the inner wall of the fixed box (231), a fixed rod (233) is fixedly connected to the working end of the electric telescopic rod (232), the bottom end of the fixed rod (233) penetrates through the inner wall of the fixed box (231) and extends to the outside of the fixed box (231), a needle base (234) is fixedly connected to one end of the fixed rod (233) extending to the outside of the fixed box (231), a middle plate (235) is fixedly connected to the middle of the surface of the fixed rod (233), a guide block (236) is slidably connected to one side of the surface of the fixed rod (233) and located at the bottom of the fixed box (231), two sides of the guide block (236) are fixedly connected with the inner wall of the fixed box (231), a third spring (237) is sleeved between the middle plate (235) and the guide block (236) on the surface of the fixed, one side of the fixed rod (233) is communicated with a hose (238), and the hose (238) is communicated with the needle base (234).

5. The perfusion chemotherapy dispensing device for oncology according to claim 1, wherein: fixedly connected with baffle (32) between the bottom of backup pad (2) and box (1) inner wall bottom, the surface of box (1) just is located baffle (32) corresponding position and has seted up the rectangular hole.

6. The perfusion chemotherapy dispensing device for oncology according to claim 1, wherein: the fixture block (11) comprises a stabilizing box (111), a sliding block (112) is connected to the inner wall of the stabilizing box (111) in a sliding mode, a fourth spring (113) is fixedly connected between one side of the sliding block (112) and the bottom of the inner wall of the stabilizing box (111), and an arc-shaped groove is formed in one side of the sliding block (112).

7. The perfusion chemotherapy dispensing device for oncology according to claim 2, wherein: one end of the fourth liquid pipe (26) extending to the outside of the box body (1) is communicated with a third puncture needle (33).

8. The perfusion chemotherapy dispensing device for oncology according to claim 1, wherein: and a control keyboard (34) is fixedly connected to the surface of the box body (1) and is positioned at the corresponding position of the controller (29).

9. The perfusion chemotherapy dispensing device for oncology according to claim 1, wherein: the top of the box body (1) is provided with a through hole matched with the vertical plate (10).

10. The perfusion chemotherapy dispensing device for oncology according to claim 1, wherein: the first pump body (14) is a bidirectional hydraulic pump.

Technical Field

The invention relates to the technical field of medical oncology appliances, in particular to a perfusion and chemotherapy dispensing device for medical oncology.

Background

The artery perfusion chemotherapy is a minimally invasive, safe and less painful tumor treatment method, and is characterized by introducing special precise instruments such as catheters, guide wires and the like into a human body under the guidance of medical imaging equipment to locally treat tumors in the human body. The treatment uses digital technology, enlarges the visual field of doctors, prolongs the hands of doctors by means of the catheters and guide wires, and can treat a plurality of tumor diseases which cannot be treated in the past, need surgical treatment or have poor curative effect of internal treatment without cutting human tissues because the incision (puncture point) is only the size of rice grains. The arterial perfusion chemotherapy has the characteristics of no operation, small wound, quick recovery and good effect. The arterial perfusion chemotherapy can match several most effective anticancer drugs together, find the tumor-supplying artery by the catheter technique, and directly inject the anticancer drug and the embolic agent into the tumor tissue. This therapy has two major advantages: on one hand, the high-concentration medicine directly acts on local parts to play the maximum anti-tumor effect, has small toxic and side effects on the whole body and enables most patients to be treated; on the other hand, the blood supply vessel of the tumor is blocked, so that the tumor loses blood supply and dies. The tumor comprehensive treatment expert Guojiheng considers that the technology is particularly suitable for the malignant tumors of liver, lung, stomach, kidney, pelvic cavity, bone and soft tissue which lose the operation chance or are not suitable for operation.

Need mix several kinds of anticancer drugs together before the current chemotherapy that pours into, stir through the stirring rod and prepare, medicine and air contact can produce certain reaction in the preparation process for the effect of dispensing is not good, and current container is dispensed simultaneously and is stirred through the stirring rod, makes and has a large amount of anticancer drugs to deposit in the bottom of container at the stirring in-process, influences the chemotherapy medicine and prepares the effect, stirs inhomogeneous simultaneously.

Disclosure of Invention

Technical problem to be solved

Aiming at the defects of the prior art, the invention provides a perfusion chemotherapy dispensing device for the medical oncology, which solves the problems that a stirring rod is used for stirring and dispensing, certain reaction can be generated when medicines are contacted with air in the dispensing process, the dispensing effect is poor, meanwhile, the existing container is used for dispensing medicines and is stirred through the stirring rod, a large amount of anti-cancer medicines are deposited at the bottom of the container in the stirring process, the dispensing effect of the chemotherapy medicines is influenced, and the stirring is not uniform.

(II) technical scheme

In order to achieve the purpose, the invention is realized by the following technical scheme: a perfusion chemotherapy dispensing device for the medical oncology comprises a box body, wherein a supporting plate is fixedly connected between two opposite sides of the inner wall of the box body, a mixing box is fixedly connected to one side of the top of the supporting plate, a motor fixing frame is fixedly connected to the bottom of the supporting plate and positioned at the corresponding position of the mixing box, a stirring motor is fixedly connected to the center of the motor fixing frame, the output shaft end of the stirring motor sequentially penetrates through the supporting plate and the mixing box and extends into the mixing box, a stirring sheet is fixedly connected to one end, extending to the inside of the mixing box, of the output shaft end of the stirring motor, a supporting seat is fixedly connected to one side, close to the mixing box, of the top of the supporting seat, a bottom plate is fixedly connected to the top of the supporting seat through a telescopic rod, vertical, a vibration motor is fixedly connected to one side of the vertical plate, an eccentric wheel is fixedly connected to an output shaft of the vibration motor, a first pump body is fixedly connected to one side of the bottom of the inner wall of the box body, a first liquid inlet pipe is communicated with an inlet end of the first pump body, a connecting seat is fixedly connected to the top of the bottom plate, one end of the first liquid inlet pipe is communicated with the connecting seat, a first puncture needle is in threaded connection with the top of the connecting seat, an outlet end of the first pump body is communicated with a first liquid pipe, one end of the first liquid pipe is communicated with a second liquid pipe through a three-way pipe head, one end of the second liquid pipe is communicated with the top of one side of the mixing box, a second pump body is fixedly connected to the bottom of the inner wall of the box body, a second liquid inlet pipe is communicated with the inlet end of the second pump body, one end of, the outlet end of the second pump body is communicated with a third liquid pipe, one end of the third liquid pipe is communicated with the lifting device, the bottom of the lifting device penetrates through the top of the supporting plate and extends to the bottom of the supporting plate, and one end, extending to the bottom of the supporting plate, of the lifting device is fixedly connected with a second puncture needle.

Preferably, the other end intercommunication of tee bend tube head has the fourth liquid pipe, the one end of fourth liquid pipe runs through the box inner wall and extends to the box outside, the surface intercommunication of fourth liquid pipe has first solenoid valve, the surface intercommunication of second liquid pipe has the second solenoid valve, inner wall of the box bottom one side fixedly connected with controller.

Preferably, a first spring is fixedly connected between the top of the supporting seat and the bottom of the bottom plate and positioned on the surface of the telescopic rod, and a second spring is fixedly connected between one side of the vertical plate and the inner wall of the box body.

Preferably, elevating gear is including fixed case, the top fixedly connected with electric telescopic handle of fixed incasement wall, electric telescopic handle's work end fixedly connected with dead lever, the bottom of dead lever runs through fixed incasement wall and extends to the outside of fixed case, the dead lever extends to the outside one end fixedly connected with syringe needle base of fixed incasement, the middle part fixedly connected with on fixed lever surface is put the board, the surface of dead lever and the one side sliding connection who is located fixed bottom of the case portion have the guide block, the both sides of guide block and the inner wall fixed connection of fixed case, the surface of dead lever has just been located and has been cup jointed the third spring between putting board and the guide block, one side intercommunication of dead lever has the hose, hose and syringe needle base intercommunication.

Preferably, a baffle is fixedly connected between the bottom of the supporting plate and the bottom of the inner wall of the box body, and rectangular holes are formed in the surface of the box body and in positions corresponding to the baffle.

Preferably, the fixture block includes a stabilizing box, the inner wall of the stabilizing box is connected with a slide block in a sliding manner, a fourth spring is fixedly connected between one side of the slide block and the bottom of the inner wall of the stabilizing box, and an arc-shaped groove is formed in one side of the slide block.

Preferably, one end of the fourth liquid pipe extending to the outside of the box body is communicated with a third puncture needle.

Preferably, a control keyboard is fixedly connected to the surface of the box body and at a position corresponding to the controller.

Preferably, the top of the box body is provided with a through hole matched with the vertical plate.

Preferably, the first pump body is a bidirectional hydraulic pump.

(III) advantageous effects

The invention provides a perfusion chemotherapy dispensing device for medical oncology. The method has the following beneficial effects:

(1) this kind of medical oncology fills chemotherapy dispensing device, top one side fixedly connected with mixing box through the backup pad, the bottom of backup pad just is located the corresponding position fixedly connected with motor mount of mixing box, the central fixedly connected with agitator motor of motor mount, agitator motor's output shaft end runs through backup pad, mixing box in proper order and extends to the inside of mixing box, agitator motor's output shaft end extends to the inside one end fixedly connected with stirring piece of mixing box, has realized that the automation stirs the mixture, guarantees the medicine misce bene, has avoided a large amount of anticancer drugs to deposit the problem in the container bottom simultaneously.

(2) The perfusion chemotherapy dispensing device for the medical oncology department is characterized in that a supporting seat is fixedly connected to one side, close to a mixing box, of the top of a supporting plate, the top of the supporting seat is fixedly connected with a bottom plate through a telescopic rod, vertical plates are fixedly connected to two sides of the top of the bottom plate, clamping blocks are fixedly connected to two opposite sides of each vertical plate, a vibration motor is fixedly connected to one side of each vertical plate, an eccentric wheel is fixedly connected to an output shaft of the vibration motor, a first pump body is fixedly connected to one side of the bottom of the inner wall of a box body, a first liquid inlet pipe is communicated with an inlet end of the first pump body, a connecting seat is fixedly connected to the top of the bottom plate, one end of the first liquid inlet pipe is communicated with the connecting seat, a first puncture needle is connected to the, the manual oscillation of the medicine bottle is avoided, and the working efficiency is improved.

(3) This kind of medical oncology fills chemotherapy dispensing device, the bottom fixedly connected with second pump body through box inner wall, the entrance point intercommunication of the second pump body has second feed liquor pipe, the one end and the mixing box inner wall bottom intercommunication of second feed liquor pipe, backup pad top one side fixedly connected with elevating gear, the exit end intercommunication of the second pump body has the third liquid pipe, the one end and the elevating gear intercommunication of third liquid pipe, elevating gear's bottom runs through the top of backup pad and extends to the bottom of backup pad, the one end fixedly connected with second felting needle of elevating gear extension to backup pad bottom carries the medicine in the mixing box to the receiving flask in through the second pump body for fill the chemotherapy, improved the efficiency of dispensing.

Drawings

FIG. 1 is a front view of the overall structure of the present invention;

FIG. 2 is a schematic view of the internal structure of the present invention;

FIG. 3 is a top view of the overall structure of the present invention;

FIG. 4 is a schematic structural diagram of the lifting device of the present invention;

fig. 5 is a schematic structural diagram of the fixture block of the present invention.

In the figure: 1-box body, 2-supporting plate, 3-mixing box, 4-motor fixing frame, 5-stirring motor, 6-stirring sheet, 7-supporting seat, 8-telescopic rod, 9-bottom plate, 10-vertical plate, 11-clamping block, 111-stabilizing box, 112-sliding block, 113-fourth spring, 12-vibration motor, 13-eccentric wheel, 14-first pump body, 15-first liquid inlet pipe, 16-connecting seat, 17-first puncture needle, 18-first liquid pipe, 19-three-way pipe head, 20-second liquid pipe, 21-second pump body, 22-second liquid inlet pipe, 23-lifting device, 231-fixing box, 232-electric telescopic rod, 233-fixing rod, 234-needle head base, 235-middle placing plate, 236-guide block, 237-third spring, 238-hose, 24-third tube, 25-second needle, 26-fourth tube, 27-first solenoid valve, 28-second solenoid valve, 29-controller, 30-first spring, 31-second spring, 32-baffle, 33-third needle, 34-control keyboard.

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. 1-5, the present invention provides a technical solution: the utility model provides a medical oncology fills chemotherapy dispensing device, the power distribution box comprises a box body 1, fixedly connected with backup pad 2 between the relative both sides of 1 inner wall of box, top one side fixedly connected with mixing box 3 of backup pad 2, the bottom of backup pad 2 just is located 3 corresponding position fixedly connected with motor mount 4 of mixing box, motor mount 4's central fixedly connected with agitator motor 5, agitator motor 5's output shaft end runs through backup pad 2 in proper order, mixing box 3 and extend to the inside of mixing box 3, agitator motor 5's output shaft end extends to 3 inside one end fixedly connected with stirring vane 6 of mixing box, the automatic stirring that stirs has been realized and has been mixed, guarantee the medicine misce bene, the problem of a large amount of anticancer drugs sediment in the container bottom has been avoided. One side fixedly connected with supporting seat 7 that the top of backup pad 2 is close to mixing box 3, 8 fixedly connected with bottom plates 9 of telescopic link are passed through at the top of supporting seat 7, the equal vertical fixedly connected with riser 10 in top both sides of bottom plates 9, the equal fixedly connected with fixture block 11 in both sides that riser 10 is relative, one side fixedly connected with vibrating motor 12 of riser 10, vibrating motor 12's output shaft end fixedly connected with eccentric wheel 13, the first pump body 14 of box 1 inner wall bottom one side fixedly connected with, the entrance point intercommunication of the first pump body 14 has first feed liquor pipe 15, the top fixedly connected with connecting seat 16 of bottom plate 9, the one end and the connecting seat 16 intercommunication of first feed liquor pipe 15, the top threaded connection of connecting seat 16 has first felting needle 17, the exit end intercommunication of the first pump body 14 has first liquid pipe 18, the one end of first liquid pipe 18 has second liquid pipe 20 through tube head 19 intercommunication. One end of the second liquid pipe 20 is communicated with the top of one side of the mixing box 3, the bottom fixedly connected with second pump body 21 of the inner wall of the box body 1, the inlet end of the second pump body 21 is communicated with a second liquid inlet pipe 22, one end of the second liquid inlet pipe 22 is communicated with the bottom of the inner wall of the mixing box 3, a lifting device 23 is fixedly connected with one side of the top of the support plate 2, the outlet end of the second pump body 21 is communicated with a third liquid pipe 24, one end of the third liquid pipe 24 is communicated with the lifting device 23, the bottom of the lifting device 23 penetrates through the top of the support plate 2 and extends to the bottom of the support plate 2, and the lifting device 23 extends to one end fixedly connected with a.

The other end intercommunication of tee bend tube head 19 has fourth liquid pipe 26, the one end of fourth liquid pipe 26 runs through 1 inner wall of box and extends to the box 1 outside, the surface intercommunication of fourth liquid pipe 26 has first solenoid valve 27, the surface intercommunication of second liquid pipe 20 has second solenoid valve 28, 1 inner wall bottom one side fixedly connected with controller 29 of box, controller 29 is used for controlling first solenoid valve 27, second solenoid valve 28, agitator motor 5, vibrating motor 12, first pump body 14, the second pump body 21 and electric telescopic handle 232, adopt the PLC controller, the present technology is mature, high reliability.

The fixed surface that just is located telescopic link 8 between the top of supporting seat 7 and the bottom of bottom plate 9 is connected with first spring 30, and fixedly connected with second spring 31 between one side of riser 10 and the box 1 inner wall avoids arousing box 1 vibrations.

Elevating gear 23 includes fixed case 231, the top fixedly connected with electric telescopic handle 232 of fixed case 231 inner wall, electric telescopic handle 232's working end fixedly connected with dead lever 233, the bottom of dead lever 233 runs through fixed case 231 inner wall and extends to the outside of fixed case 231, the one end fixedly connected with needle base 234 that dead lever 233 extends to fixed case 231 outside, the middle part fixedly connected with on dead lever 233 surface puts board 235, the surface of dead lever 233 and the one side sliding connection who is located fixed case 231 bottom have a guide block 236, the both sides of guide block 236 and the inner wall fixed connection of fixed case 231, the surface of dead lever 233 and be located and cup jointed third spring 237 between centering board 235 and the guide block 236, one side intercommunication of dead lever 233 has hose 238, hose 238 and needle base 234 communicate, realize piercing second felting needle 25 in the receiving flask, make things convenient for the medicine to pour into and use.

Fixedly connected with baffle 32 between the bottom of backup pad 2 and the box 1 inner wall bottom, the surface of box 1 just is located the corresponding position of baffle 32 and has seted up the rectangular hole, is convenient for get and puts the collecting bottle.

The fixture block 11 comprises a stabilizing box 111, a slider 112 is slidably connected to the inner wall of the stabilizing box 111, a fourth spring 113 is fixedly connected between one side of the slider 112 and the bottom of the inner wall of the stabilizing box 111, an arc-shaped groove is formed in one side of the slider 112, and the powder medicine bottle is clamped.

The end of the fourth liquid pipe 26 extending to the outside of the case 1 is communicated with a third pricker 33.

A control keyboard 34 is fixedly connected to the surface of the box 1 at a position corresponding to the controller 29, and controls the working state of the device.

The top of the box body 1 is provided with a through hole matched with the vertical plate 10.

The first pump body 14 is a bi-directional hydraulic pump.

In operation, the third puncturing needle 33 is communicated with a base liquid medicament bottle, the first puncturing needle 17 is communicated with a powder bottle, the first electromagnetic valve 27 is opened, the second electromagnetic valve 28 is closed, the first pump body 14 rotates forwards to pump the base liquid medicament into the powder bottle, the vertical plate 10 is driven by the vibration motor 12 to vibrate, so that the base liquid medicament and the powder medicament are fully mixed, then the first electromagnetic valve 27 is closed, the second electromagnetic valve 28 is opened, the first pump body 14 rotates backwards to pump the medicament in the powder bottle into the mixing box 3, other liquid medicament bottles are communicated with the first puncturing needle 17 and are pumped into the mixing box 3, at the moment, the stirring motor 5 drives the stirring sheet 6 to rotate to uniformly stir, then the collecting bottle is placed at a position corresponding to the second puncturing needle 25, the electric telescopic rod 232 is started to enable the needle base 234 to move downwards, the second pump body 24 operates to pump the medicament in the mixing box 3 into the collecting bottle, then used by perfusion.

It is noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation. The use of the phrase "comprising one of the elements does not exclude the presence of other like elements in the process, method, article, or apparatus that comprises the element.

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.