JPH02503761A - Orthopedic cement mixer - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Detailed description of the invention] Orthopedic cement mixer Technical field The present invention uses liquid and dry reactors to form articles for use in orthopedic surgery. This relates to Hf1l mixed with chemical substances.

1 and yam A known type of high vacuum orthopedic cement mixer is disclosed in U.S. Pat. No. 5,072. This cement mixer uses monomers (monomer) during mixing. In order to eliminate the vapor and odor of mercury from the surgical seedlings, It is designed to operate at very low vacuum pressure levels in the range of 120 to 120 cm. There is. Prior to this, mixing was done by hand in a wide-mouthed container using a spatula. This was done by

In many orthopedic surgeries, for example, installation of artificial joint implants, bone and joint surgery, etc. Cement treatment or molding, or other molding in orthopedic treatment, etc. It is well known that the use of grouting and grouting chemicals is required. . These types of cement commonly used for medical purposes are self-curing resins. This includes various types of liquid monomers or comonomers. ) and powdered polymer or copolymer (C0DOIV11er) to form a viscous mixture for use as a grouting agent. It is made in such a way that Once hardened, the cement made contains poly(metal) as the main component. tacrylic acid) (IIIOIV) esters)). Both the powder and therefore the cement are radiopaciferous. radiopacifier, antibiotics, plasticizers, chipping agents cross-linking agent), mixed reinforcing fibers or beads , can contain substances such as.

A mixture containing a powder component and a liquid component is a rapidly hardening forest material and is therefore not suitable for cement. The preparation is done directly in the hand IW immediately before use. This mixture rapidly The viscous mixture is used in orthopedic medicine before it naturally polymerizes and hardens the cement. must be made available for use.

Powder components that can be air-fluffed powders By surrounding the powder particles with air (up to 50% by volume), It is generally desirable to be able to easily wet the powder with a liquid. this needed sky If the air cannot be removed from the mixture after it has aired, it will eventually Small to medium-sized pores are left inside the pores. Main departure Before the Ming Dynasty, such removal of air, that is, deaeration of cement, was considered impossible. There it was.

There are many causes of air bubbles within cement mixtures. For example, air present in powder components is captured by mixing with the liquid or while the admixture is being mixed. It becomes a lump of grains, and when these grains coalesce, air bubbles are formed in the grains. Ru. Knead or move the mixture through the spatula using a known spatula shape. air inside the mixture by entraining external air, as is found in cases where This will create bubbles. Furthermore, according to the known spatula shape, small bubbles and medium Intermediate sized bubbles are allowed to coalesce and grow into larger bubbles. or , bubbles formed by monomer vapors can also be allowed to exist inside the mixture. Ru.

The cement is mixed homogeneously and thoroughly in a relatively short time, which allows it to be mixed as quickly as possible. It must be homogenized and preferably trap gas as air or monomer vapor. must be avoided. Mixing the cement components is the internal process of the mixture. gas will be taken in. This trapped gas aerates the hardened cement. To be free of pores and exhibit the desired high static and dynamic mechanical strength. Therefore, it must be removed.

Gases trapped in the mixture should be removed from the mixture during mixing as much as possible, even if only a small amount Few, if any, of the trapped air bubbles remain inside the viscous mixture. In this way, it is preferable to eliminate pores generated inside the hardened cement. the If such air bubbles remained inside the mixture, the mechanical properties of the cement after hardening would be affected. properties do not have the desired properties; their bubbles, the space occupied by trapped air, Or the stomata, the li! Cracks occur in the cement after hardening at the locations where It ends up. Also, vapors of certain monomers which are noxious and/or toxic in nature. for several minutes to occur and to ensure the formation of a homogeneous mixture. Since mixing often takes place, it is necessary to filter the removed gases. It is desired.

Description of the invention The present invention basically relies on the formation of the admixture from the spaces between the powder particles before mixing and during mixing. 550 am of mercury to allow for degassing or removal of trapped air. The mixture components are placed in an apparatus to thoroughly mix them under partial vacuum conditions. This invention is A mixing chamber designed to prevent gas bubbles from being drawn into the mixture during mixing. use. Furthermore, following the initial mixing, the mixture is moved back and forth clockwise and counterclockwise. This allows the spatula to interact with the mixture components, causing flow and mixture agent into the mixing vessel. This creates a state of movement that helps remove any remaining gas bubbles. It becomes. As the mixing blade moves through the ingredients, it It creates a very large exposed area inside the agent, and gas bubbles migrate toward this exposed area. be moved and destroyed. The present invention provides greater benefits than hitherto desired. Therefore, it is necessary to consider equipment that can withstand high vacuum pressure.

The invention is described in the patents of Puderbaugh et al. Improved, substantially reinforced outer housing to withstand high vacuum pressures a reaction mixing vessel having an improved seal cover structure and a significantly improved It consists of a mixture of The H position described in Buderbau et al. The inside of the reaction mixing vessel can be Receives sufficient airflow to create an excessive vacuum inside the device. In particular, it is necessary to avoid The present invention is exactly the opposite. It explores the concept of being able to generate large vacuum pressure and To provide a reaction mixing container capable of preventing outside air from leaking into the inside. It is.

Additionally, mixing blades, beaters, or The vanes are unable to mix the materials properly and, moreover, the partial negative pressure inside the mixing chamber The components being mixed in the mixing chamber should be exposed to the conditions as much as possible. It was not possible to handle or process the amount. Furthermore, conventional mixing devices have a mixing chamber. to create a circulating flow path that moves the mixture components upward or downward at the center of the Additionally, there is no circulating flow radially to or along the side walls of the mixing device. It does not create a path of movement.

All of these flows assist in degassing the viscous mixture.

If you put a liquid in the mixing chamber and add powder to the liquid, the hot water side will start, but the result will be The powder remains suspended on the surface of the liquid. Close the container and apply partial vacuum. Although not all of the air that was trapped within those airborne powders by amount will be removed.

Spatula construction to remove trapped gas bubbles that are trapped within the mixed components rupture such pores or bubbles by the body or by the vacuum conditions in the mixing chamber. must be cultivated. To accomplish this, air bubbles are placed on exposed surfaces in the mixture. It must be moved very close to or exposed. simultaneous However, the formation of large pores or bubbles is undesirable. small gas bubbles The mixture may stick together and grow into larger bubbles, or It does not assist in removing air bubbles from the admixture and may cause the hardened cement to This results in further deterioration of the body's mechanical properties. Therefore, during mixing the table of admixture The area is constantly enlarged and deformed so that the trapped and contained air bubbles are It has been found that it is necessary to ensure that the admixture is moved towards the exposed surface. It was. As the bubbles are thus moved towards the exposed surface of the mixture, The trapped gas bubbles are destroyed by the action of the mixing device, or the ratio within the container is Destroyed by exposure to relatively high vacuum conditions. This vacuum pressure level is The i It must also be understood that i+@ is preferred.

If the applied vacuum pressure is too weak, the porosity-causing gas is effectively removed from the viscous mixture. cannot be removed. Conversely, if this vacuum pressure is too strong, the liquid monomer will boil and As a result, the problem of pore formation occurs incidentally.

The mixing spatula has a unique shape. Also, this mixing spatula can be used both clockwise and counterclockwise. Depending on the direction of its rotation, which may be the direction, a special flow is created within the mixture.

The spatula not only provides excellent mixing, but also creates a circular flow that Maximum and constantly changing surface area of the components is exposed to the vacuum inside the reaction mixing vessel so that air bubbles trapped during mixing are exposed and release gas. It guarantees that Furthermore, this spatula structure allows air bubbles to coalesce during mixing. In other words, the gas contained in small bubbles is not fused into large It is treated in the same way as air bubbles.

The mixing device described here can e.g. Various types of monomers or comonomers and polymers or is basically used as an internal complement wire for internal shaping, such as those made by mixing with copolymers. Designed for mixing various types of bone cement, such as self-curing resins used in It is measured. This mixing device can also be used to mix different amounts of bone cement immediately. Although it is not common, a single batch of this bone cement mixture of 509-1209 is available. batch is designed to mix a and double batches .

Other objects, features, and related components of the method and structure of the present invention. The economy in actuation and pulling and in the combination and manufacture of parts is shown in the accompanying drawings. Further information may be obtained by considering the following description and claims with reference to Let's be clear. All the attached drawings form part of this document, and the same reference numerals refer to the same numbers. The same part is shown.

Brief description of the drawing The first factor is an exploded perspective view of the device constituting the present invention. Elevation: Figure 3 is a top plan view of the reaction mixing vessel shown in Figure 2: 4a is a cross-sectional view of the device shown in FIG. 1; FIG. 4b is a cross-sectional view of the device shown in FIG. 4b; Figure 5 shows the reaction mixing vessel in cross section with the handle removed; An elevational view of the spatula of the invention showing a portion of the vessel: FIG. 6 shows the top of the cover shown in FIG. Partial plan view: Figure 7 shows the side view of the cover with the spatula and hand crank in place. Cross section: Figure 8 shows the bushing used to seal around the spatula on top of the cover. Side elevational view: Figure 9 is a cross-sectional view taken along line 9-9 of Figure 8; Figure 10 is a cross-sectional view taken from Figure 9. Enlarged cross-sectional view of part of the rim of the bushing shown in: Figure 11 shows the installation of the spatula in a side elevational view of the support; Figure 12 shows the line 12 in Figure 11. -12 cross-sectional view: Figure 13 is a cross-sectional view of the mounting column shown in Figure 11; : FIG. 14 is a top plan view of the mounting column shown in FIG. 11; Figure 15 is a front elevational view of the spatula shown in Figure 1; Figure 16 is a front elevation view of the spatula shown in Figure 15; Figure 17 shows a partial bottom plan view of the mixing vessel shown in Figure 2. surface drawing; and Figure 18 is a top plan view of the bottom plate of the mixing vessel shown in Figure 4a.

DETAILED DESCRIPTION OF PREFERRED EMBODIMENTS 11 balls 2m Referring to FIG. 1, the apparatus of the present invention includes a cover assembly 20 and a reaction mixing vessel assembly. It is configured to include a body 22.

Cover assembly 20 includes a handle or hand crank 24 . this hand The crank 24 is assembled to a bushing 26, and this bushing 26 A seal washer 30 is provided between the member 28 and the member 28. ing. A rubber or foam gasket 32 is attached to the cover as shown in Figure 4a. attached to the inner circumference. The left side wall cover has been broken out for clarity. , gasket 32 is shown. This cover is shown in full form on the right side of the drawing. ing.

Cover assembly 20 also includes a subassembly designated as spindle post 34. the The upper portion extends through member 28 and bushing 26 and is secured to handle 24. It has become so. The lower end of the post 34 supports a two-blade mixing spatula 36. Installation is considered a part. Separately, a material stirring tool 38 is attached to the integral flange of the column 34. 40, which flange is shown in FIG. 4a during assembly. The cover 28 is engaged with the bottom of the cover 28 so as to be engaged with the bottom of the cover 28.

Reaction mixing vessel assembly 22 includes an outer housing 50, which The ring 5o has an angled upper rim 52, an internal concave mixing bowl or mixing chamber 54, and an upper an outer upper end having a tapered outer side 1!56 near the rim 52; said shoulder 58 terminating in a shoulder 58 extending substantially horizontally to the sidewall 56; an upper end and a tapered outer lower side extending downward from shoulder 58; W60. A vacuum connection nozzle 62 is provided near the base of the housing 50. It is. A cap 64 provides for closing the nozzle 62 to maintain sterility. It is being With the exception of cap 64, these components of the mixing vessel are of a conventional partial mode. Preferably, it is formed integrally by molding. Place this mixing container in a silicone hose. a method of bleeding air subsequent to mixing other than by introducing a gas (not shown); For this reason, another air extraction means 65 is installed near the nozzle 62! You can prepare for 160 Wear. The bleed means are covered with a removable tape 66.

Reaction mixing vessel assembly 22 also includes a base assembly 70. This base assembly 70 includes a flat bottom member 72 on which a square housing 7 is mounted. 4 is installed. This housing 74 includes another cover 80, which A bar 80 is provided to surround the filter. The filter is porous i.e. It includes foam pads 76 and 78 having oven cells, which are attached to the housing. located on opposite sides of the ring. Each pad is 1 part per 25.4 parts m (Iin) It has a porosity (III) of 0.00. Hydrophobic property to prevent blowback A filter 79 is disposed between the pad 76 and the inside of the housing 50. . This anti-blowback filter preferably has a pore size of about 0.8 μm. Also, when the vacuum pressure is released after mixing and prior to removing the cover, Fine charcoal powder is blown back from the charcoal absorbent 102 toward the mixture. Preferably, it is made of acrylic material to prevent it from becoming wet.

Additionally, a rubber or foam gasket 82 is provided to ensure that the flat bottom portion A seal is formed between @72 and housing 50.

The strut 34 and flange 40 are preferably formed as an integral unit; , the housing 5o has a concave mixing bowl 54, sides W156 and 60. and nozzle It is noted that it is also preferably formed as an integral unit with the IIN section 62. must be understood. The flat member 72 and the halves attached to it Udings 74 may be formed separately as an integral unit or may be attached to a wall containing them. Structure 74 may be formed separately using conventional methods, such as adhesive or conventional heat sealing methods. , can be fixed to the flat member 72 by.

Referring to FIG. 2, the bottom portion of nozzle 62 is enlarged as shown at 84. This portion protrudes outward from the side wall 60. Also, the inside has the same shape It is said that The shape of this portion 84 is quadrangular, or roughly trapezoidal. It will be done. In either case, it is designed to have a similar inner recess, and a housing is installed inside the recess. The front of the ring 74 and top 80 are adapted to be received.

If desired, an additional sealing gasket 88 as shown in FIG. around the housing 74 in which the receptacle is received, as well as the recess of the housing 74; A tongue portion 86 that protrudes forward and is provided on the top member 8o as shown in FIG. Made to seal. This forwardly protruding tongue 86 is the top of the enlarged portion 84. It is fitted into the horizontal part. This is shown in the assembled state in Figure 4a. has been done.

Housing 74 includes a pair of upright spaced apart sides "190 and 92. These side walls have a pair of spaced apart end walls 95 attached to each end thereof. 94 is formed between them. The groove for inserting this receiver is shown in Figure 4a. As shown in FIG. , filters 6 and 78, anti-blowpack filter 79, and charcoal or It is composed of an absorbent body made of other gas absorbent material. The end wall 95 is also A cutout or opening 96 is provided to create a clear passage through the filter. . As shown in FIG. 4, one end of housing 74 is notched against gasket 88. The other end is located close to the inside of the housing 50 and has a wall portion 6o inside the housing 50. are spaced inwardly from each other. As shown in Figure 3, the slope The exposed surface 52 is provided with a plurality of air bleed means or openings 100. These are how forming between the mixing bowl 50, the inner surface of the mixing bowl 54, and the base assembly 7o described above. It leads to the exhaust chamber. During use, the air contained inside and the reaction generated by the reaction between the cement components of the mixture inside the mixing vessel 54. Gas is withdrawn through the bleed means 100 to the outer surface of the container 54 and the housing 50. into the inner gate housing and toward the rear of the housing 74 to filter and finally through nozzle 62 to the vacuum Vill. (not shown). comprising one such filter means and absorption means. If this is not desired, the charcoal or absorbent material 102 inside the filter unit may be omitted together. However, in most embodiments, absorbent filtering is desired. It is possible.

Projecting inwardly to provide internal reinforcement for the housing 50 and in particular for the wall 60 A sleeve 104 is provided.

These ribs extend from a location substantially proximal to the bottom edge 106 to the base of the wall 56. will be accomplished. These internal ribs extend approximately 19 am along the inner circumferential direction of the housing 50. (3/4 inch) and are preferably integrally formed with the housing. At the same time, a gap formed between the wall portion 6o and the mixing container 54 above the flat surface 72 To prevent these walls from dipping inward when vacuum pressure is applied to the exhaust chamber. It is preferable to

Referring to FIGS. 1 and 6, cover 28 includes an upright cylindrical portion 110. . This cylindrical portion 110 forms the outer periphery of the cover, from which the tapered portion 1 12 is hanging down. The inner plane portion 114 is the joint between the cylindrical portions 110 and 112. extending across the interior of the circle rsiio near the A radially extending rib 116 is provided on the plan view 114 thereof. . Each of these ribs terminates in an upright cylindrical wall 118 located inside. A cylindrical recess or hole 120 is formed inside the wall. child A cylindrical sleeve 122 depends from the hole.

The inner diameter of this sleeve 122 is smaller than the inner diameter of the recess 120, and the support 34 is installed inside. The size of the receiver is such that it can be rotated.

8-10, the bushing 26 includes an upright collar portion 124. A slanted flange surface 126 extends from a portion of this collar. cylindrical A sleeve 128 extends from the bottom of the flange face 126 and is shown in FIG. This sleeve 128 is spaced apart from a parallel depending cylindrical portion 130 as shown in FIG. There is. A cylindrical hole 132 is formed in the center of the bushing 26 and an annular groove 13 4 is provided at the bottom of the cylindrical portion 130 in coaxial alignment with the bore 132. 1st Referring to FIG. 0, depending sealing ribs 136 are spaced outwardly from sleeve 128. It is also noted that the flange 126 . Ribs 36 are ultimately provided on the cover, particularly on the top edge of the cylindrical portion 118. It can be glued or welded to the shoulder.

Such a seal structure is shown in both FIG. 4a and FIG. 7.

Referring now to FIGS. 11-14, spatula post 34 includes a main cylindrical shank; Its upper end is provided with four molded ribs 140. These ribs The receiver is received within a depending cylindrical sleeve 142 forming one end of the handle 24. It will be done. The handle 24 may be a heat sealed or glued directional drive. I can do it.

When the cover assembly 20 is fully assembled as shown in FIG. 24 is fixed to the top end of the column 34 that projects upward from the cylindrical sleeve 122. It will be done.

The bushing 26 is held in the middle and together with the gasket 3o surrounds the shaft 34. to form a seal. Preferably, the collar 40 abuts the underside of the sleeve 122. I would like to add something. In this way, the cover assembly 2o is placed over the housing 5o. Once in place, the depending tapered outer sleeve 122 has a similar It extends over the tapered sidewall 56, with the inner surface of the sleeve 122 being the side! It is brought into contact with the outer surface of 156. The gasket 32 is attached around the exterior of the upper edge 52. A further seal is formed except on the radially outer side of the opening 1oO, and - direct vacuum pressure is supplied. If this is the case, while allowing gas circulation through the opening 100, the necessary This ensures that vacuum pressure can be created. The outer peripheral edge of the edge 52 is the gasket 3 It should be added that it can be flattened at the part that is in contact with 2.

The preferred level of vacuum pressure is about 550 am of mercury, and the preferred range is The price of the pillar is about 500 to 600 shoes. Gasket 3o is assembled to the handle The spatula structure is rotatably held together with other members and support structure. Seal the area around the pillar. Therefore, vacuum pressure is applied through the nozzle 62. This makes it possible to effectively exhaust the inside of the reaction mixing vessel 54.

The struts 34 are approximately 105.8 mm (4,165 in) long and 6.35 in. , 250 inches).

Collar 40 has a diameter of approximately 19.05 as+ (0.75 in) and slots 14 4 is approximately 25.4 (1 inch) long and the range 148 extends from the top of the slot down. Positioned at approximately 5.08m5+ (0,200in) toward the It has a horizontal length of 0.023 inches.

Now, referring to FIGS. 15 and 16, the spatula 36 has two spatula vanes 160. and 162. These spatula vanes have a span of 16 4 are connected to each other. This spanning portion 164 is the hanging O-button 16. 6 and the lobe is located within a recess 168 provided in the base of the reaction mixing vessel 154. It is designed to be mated to the In this way, the stirring structure is stabilized inside the container. made with the state. A spring clip extends upwardly through the span 164. ing. This spring clip has two spaced apart spring portions t416B and 1 70, between which there is a part of the core molded into the strut 34. It has an internal shape 172 whose shape matches that of 146 . Furthermore, the spring member 168 and 170 each have a sloped inner leading edge 174; The leading edge terminates at a horizontal clipping surface 176. The spatula is placed on the post 34. Once installed, spring clips 168 and 170 are moved into slot 144 and the spatula As the is moved upward, the inclined surface 174 slides around the curved lower edge. The spring clips 168 and 170 are deformed outwardly.

As the spring clip is moved upwardly along sidewall 147, surface 176 aligns with ledge 14. 8 and snaps into place. This way it's easy and effective A fixed structure is provided between the spatula 36 and the strut 34.

As more noted in FIG. 16, each spatula 160 and 162 and between them An angle is provided between the extended spring portions 0168 and 170. similar A suitable angle is maintained between each spatula and the support post 34 even after the assembly of those members is completed. available. This angle, along with the flat large smooth surface of each spatula, is Appropriate upward lifting and downward pushing that is preferably used To obtain a mixed stroke of f! It is essential. For example, the spatula first moves in one direction. and then rotated in the opposite direction. This not only provides good mixing but also Move the mixed ingredients to expose any air contained therein and also remove any desired air within the ingredients during mixing. to form a new exposed surface. This angle is indicated by the symbol rAJ in Figure 16. This angle is preferably 32°, and the preferred angle is The range is about 30" to about 34 degrees.

As the spatulas are rotated counterclockwise, the upper surface of each spatula engages and draws the mixture. Lift it upwards and try to move it upwards towards the curved edge at the top. Love to each The top of the ladle should not protrude above the mixture components, regardless of the internal volume of the mixing container. It was discovered that there must be.

Thereafter, as the mixture flows past the top and/or periphery, the mixing The material cracked above the Iil edge of the spatula blade, exposing the air bubbles it contained. The exposed surface is made very large. .

As the spatula is rotated clockwise, the underside surface of each blade engages the mixture and releases it. Push it down toward the bottom of the mixing container, and then push it along the outside of the container. Move outward and upward between these surfaces and the outer flank of the blade. child This creates a very large exposed surface for the mixture.

Mixing blade 36 is preferably thin and made of styrene steel. its thickness is approximately 0.762 shoes (0.030 inches). From Hella Blade's 0bu166 The height to the top of the spatula is approximately 54.53 sm (2,147 in), and the width is approximately 64 in. ．． Is it supposed to be 0m (2,52in)? In the inertialized blade, reference numeral 172 The opening indicated by is approximately 11.28aII (0,444 inches) below edge 176. The spring clips 17C1 and 172 have a height of approximately 16.18as+(0,63 7 inches). The spacing between each spatula and adjacent clip is approximately 1.02 am (0,040 in), and edge 176 is approximately 0.41 am (0,016 in. ) has a length of The distance between the inner edges of the spatulas is 8.38 am (0,330 in). It is said that the spatula is preferably made of stainless steel, The important thing is that the housing is not bulky and is made of a relatively thin but sufficiently rigid material. and can be bent or formed at an appropriate angle as shown. That's what it means. Therefore, this spatula has suitable blade dimensions and strength Very hard plus to have a relatively small cross-sectional thickness desired with tic, thermal effect@4 fat, or other suitable artificial materials. It can be done. This blade structure is similar to the traditional method of stirring the mixture upwards. In contrast to the structures, in their direction of rotation and also in rotational relationship with the outside of the mixing chamber. so as to continue in various directions beyond each of spatulas 160 and 162. It is important that it is stirred. The outer edge of the blade 36 is curved. Preferably, it is also curved gradually from the bottom to the top, so that the spacing It is preferable that its outer edge separates from the wall of the mixing chamber near the top of the . In addition, a stirring tool 38 extending downward along the side wall is used to prevent the support 34 from rotating. It is preferable to continuously scrape off the top of all of the mixing chambers when the mixture is mixed. mentioned above As mentioned above, this spatula structure allows for large exposure to the mixture near the periphery of each spatula. It forms the exposed surface area. While this spatula is being rotated, this action The contained air bubbles are successively exposed to the opened or exposed surface, and this It is made so that the gas is released into it when it is destroyed.

Furthermore, the rotational flow established by the rotation of the spatula is the opposite rotational flow in the form of a central vortex. The movement of the mixture is upward or downward depending on the direction of rotation of the spatula. It is moved along the container wall and in the direction toward or away from the support column 34. Ru.

The invention relates to embodiments which are presently considered the most practical and preferred. Although described, the invention should not be limited to the embodiments disclosed herein; On the contrary, various modifications included within the spirit and scope of the claims. It must be understood that the stomach.

Jyo Z (no change in content) Submission of translation of written amendment (non-female Article 184 (7)?→)

Claims (1)

[Claims] 1. an admixture component for mixing liquid and dry components and also during mixing; An apparatus for removing gas from a reaction mixing vessel and a removable cover for sealing the reaction mixing vessel; an assembly; The reaction mixture vessel includes an outer housing and a bottom closure filter assembly; The outer housing has an inwardly extending upper end and is integrally formed from the upper end. a mixing bowl is depending, the mixing bowl inwardly from the outer housing; An exhaust chamber is formed between the two at an interval, and the upper end portion is connected to the exhaust chamber. including means for forming a plurality of spaced apertures for providing communication. Instead, the outer housing includes an exhaust hole that allows the filter assembly to pass through the outer housing. and communicates from the outside into the exhaust chamber and through the opening. And, The cover assembly includes a cover for closing the mixing bowl and a cover that operates with the cover. and is adapted to be assembled and extend downwardly into the interior of the mixing bowl. a mixing device; a mixer between the cover and the upper end portion radially outward of the plurality of openings; sealing means for forming a seal between the two; The mixing device includes a pair of opposed angled mixing blades, each blade having a The board is located at an angle ranging from about 30° to about 34° from the vertical plane, and the mixing device The rotation of the position generates a mixing force acting on the components, and this mixing force is directed approximately vertically. At the same time, the ingredients are mixed while the mixing device is operated. forming a large exposed area; A mixing device comprising: 2. 2. The apparatus of claim 1, wherein the mixing device is rotated to mix the mixture. A mixing device characterized in that a rotational mixing force is generated in opposite directions to the components. 3. 2. The apparatus of claim 1, wherein the admixture components are located at the top of the mixing reaction vessel. radially inwardly across the mixing reactor and then through the central portion of the mixing reaction vessel. flows downwardly across the bottom and then upwardly along the walls of the mixing reaction vessel. A mixing device characterized in that a mixing force generates a flow path such that the flow flows in one direction. . 4. 2. The apparatus of claim 1, wherein the blade is at an angle of about 32° from the vertical. A mixed display characterized by being arranged in . 5. 2. The apparatus of claim 1, wherein the outer housing and the cover include: Reinforce the top of the cover and the outer housing, respectively, and insert it into the inside of the front two devices. further comprising reinforcing means for resisting inward deformation. A mixing device for 6. 2. The device according to claim 1, wherein an upwardly directed lifting force and a downwardly directed lifting force A positioning device characterized in that a downward force directed toward the position is included in a vertical direction. 7. Apparatus for mixing components under vacuum, comprising: a housing assembly; a force bar assembly for sealingly surrounding the housing assembly; The mixing assembly includes a mixing chamber and a vacuum source operatively connected to the mixing chamber. and the cover assembly includes a mixing assembly, the mixing assembly being a cargo cover assembly. a shaft rotatably mounted on and a pair of opposing angled mixing shafts The blade is configured to have a blade at an angle of about 30° to the vertical plane. is located at about 34° and is fixed to the shaft and rotates within the mixing chamber. The components in the mixing chamber are caused to move. In a mixing device comprising: Vertical movement in the center and circumferential movement near the outer part of the mixing chamber. A mixing device characterized by the movement of 8. 8. The apparatus according to claim 7, wherein the mixing blade is moved within the mixing chamber. A mixing device characterized in that rotating flow in opposite directions is generated by rotating. 9. 8. The apparatus of claim 7, wherein the mixing blades are each A mixing device characterized in that the mixing device is arranged at an angle of about 32°. 10. 8. The device according to claim 7, wherein the mixing blade is made of a rigid material. and has a substantially uniform thickness of approximately 0.762 mm (0.030 in). A mixing device characterized by: 11. 11. The apparatus of claim 10, wherein the mixing blades each substantially A mixing device characterized in that it has a flat front and rear surface. 12. 11. The apparatus of claim 10, wherein the blade is made of stainless steel. A mixing device characterized in that it is made of plastic or plastic. 13. 8. The apparatus of claim 7, wherein the positioning assembly scrapes a mixing chamber. further comprising scraping means spaced from said mixing spatula to A mixing device featuring: 14. 14. The apparatus according to claim 13, wherein the scraping means comprises an L-shaped wire. - a housing fixed to the shaft and defining the mixing chamber; A mixing device characterized in that it extends outwardly towards. 15. 8. The apparatus according to claim 7, wherein an operation between the mixing chamber and the vacuum source is provided. Mixing device characterized in that the dynamic connection is equipped with a gas filter. 16. 8. The apparatus of claim 7, wherein the mixing chamber has a curved bottom wall. It is dish-shaped, with a lower curved side wall extending outwardly and upwardly from the curved bottom wall. and a substantially vertical upper side wall extends upwardly from the lower side wall. A mixing device characterized by: 17. 17. The apparatus of claim 16, wherein the mixing blade has a curved outer surface. A mixing device characterized in that it has a peripheral edge. 18. Mix orthopedic cement in a closable, evacuated container. A method in which liquid and dry cement containing gas in the interstices are mixed and the Close the container and vent the air. Alternately mix the ingredients in a clockwise and counterclockwise direction so that both ingredients are vertically upward and This causes the ingredients to be mixed in an alternating downward motion. A large surface area causes the formation of A mixed method characterized by the inclusion of stages. 19. Mix orthopedic cement consisting of a mixture of liquid and dry materials. A method of mixing in a container, (1) Place the liquid and dry ingredients into the mixing container, and (2) close and evacuate the mixing container. , removing at least some amount of interstitial air from the drying material; (3) Mix these ingredients alternately clockwise and counterclockwise, and this mixed A large forming an exposed surface, (4) air that is trapped from the mixed material by continuous evacuation during mixing ( (5) Continue steps (3) and (4) until the material is completely impregnated. Continue, A mixed method involving stages. 20. 20. The method of claim 19, wherein the mixing vessel is evacuated and the mixing volume is evacuated. The vacuum pressure inside the vessel is in the range of 500mm to 600mm of mercury. Mixing method. 21. 20. The method of claim 19, wherein the mixing step includes transferring the mixed material to a mixing spatula. A method of mixing comprising the step of moving along a substantially flat surface. 22. 22. The method of claim 21, wherein the spatula includes two flat planar parts. , a mixture characterized in that their plane parts are angled in opposite directions to each other Method. 23. 22. The method according to claim 21, wherein the mixing step includes a mixing container and a spatula. Mixing characterized in that it comprises the step of pressing at least an amount of mixed material between Method. 24. An apparatus for mixing orthopedic cement components, the apparatus comprising: a housing; formed by an inner wall and an outer wall attached to the housing; a mixing container, a portion of which is spaced inwardly from the housing; an opening for connecting the interior of the container to the portion between the housing and the outer wall of said container; a stage, a cover sealing the mixing vessel, and a cover rotatably attached to the cover. a mixing spatula attached to a shaft, the mixing spatula being attached to one end of the shaft; It is comprised of a handle and a spatula member attached to the other end of the shaft. and a central portion and a corresponding portion for attaching the spatula member to the shaft. a central portion and two solid brakes positioned on opposite sides with respect to said shaft; the blade member has an outer peripheral edge portion; is positioned directly against the bottom inner surface of the mixing vessel, and its vertical be curved in a direction that gradually moves away from the inner wall along the portion extending in the direction; , a vacuum source operatively connected to the mixing vessel; Mixing equipment. 25. 2. The apparatus of claim 1, wherein the dry ingredients are airborne powders and powders. A mixing device characterized by: