Device And Method For Mixing And Storing Polymethyl Methacrylate Bone Cement With Pressure Pump And Ampoule Breaker

[0174] Figure 1 to 6 The device according to the present invention for mixing polymethyl methacrylate bone cement and for storing the parent components (specifically, monomer liquid and cement powder) of the bone cement is shown in different views The first exemplary embodiment. The device is suitable for implementing the method according to the invention.

[0175] The device comprises a hollow cylinder 1 in which a pump plunger 2 which is cylindrical in some areas is arranged to be axially movable. An opening device 3 in the form of a short lever 3 is installed at the outer side wall of the hollow cylinder 1 so as to be pivotable about an axis perpendicular to the direction of the axis of movement of the pump plunger 2. A recess in the form of a window is located in the cylindrical housing of the hollow cylinder 1 in the area of ​​the joystick 3, via which the joystick 3 is in the initial position ( Figure 1 to 3 ) Extends into the interior of the hollow cylinder 1. therefore, Figure 1 to 3 The initial position of the device is shown, which is defined by the way the joystick 3 is placed and the position of the pump plunger 2.

[0176] Next to the joystick 3, a receptacle 4 for the glass ampoule 5 is provided, into which the glass ampoule 5 has been inserted. The glass ampoule 5 is filled with a monomer liquid (not shown). At its base (at Figure 1 to 3 At the bottom of the middle), the glass ampoule 5 rests on the edge or protrusion. In the area of ​​the window or recess in the hollow cylinder 1, the receptacle 4 is only delimited by a deformable side wall 6 made of rubber or another flexible synthetic material. The lever 3 abuts against the deformable side wall 6 via the edge 7 or the wedge 7. Glass ampoule 5 in the initial position ( Figure 1 to 3 ) Is not opened. The initial position is therefore suitable for storing monomer liquid or parent components.

[0177] A cartridge 8 including a cylindrical interior is arranged on the other side of the hollow cylinder 1 with the pump plunger 2. The cement powder (not illustrated) is located in the barrel 8 as the second parent component of the PMMA bone cement. At the bottom side (at Figure 1 to 6 At the bottom of the middle), the barrel 8 is connected to the base of the hollow cylinder 1 by means of a connecting line 9. The connecting line 9 forms a loop 10 between the cartridge 8 and the hollow cylinder 1, said loop being arranged above the base of the glass ampoule 5. This prevents the monomer liquid from flowing directly into the inside of the barrel 8 when the glass ampoule 5 is opened. The connecting line 9 leads to the barrel 8 via a fitting 12. The fitting 12 is provided with an external thread 14 to which the internal thread 16 at the front side of the barrel 8 is screwed. The cartridge 8 is therefore connected to the fitting 12 in a releasable manner. Once the PMMA bone cement has been mixed in the inside of the barrel 8, a delivery pipe (not shown) can be screwed into the internal thread 16, via which the mixed PMMA bone cement can be driven to drive the discharge barrel 8 And apply it.

[0178] The powder impermeable and liquid permeable filter 18 is located in the fitting 12 in the connecting line 9 at the connection point to the cartridge 8. This filter 18 prevents the cement powder from falling into the connecting line 9 from the inside of the barrel 8 and reacting there with the monomer liquid, thus preventing PMMA from blocking the connecting line 9 when it solidifies. The mouth of the connecting line 9 leading to the inside of the barrel 8 is formed as a nozzle. The nozzle is preferably formed according to US 8 662 736B4.

[0179] In the interior of the barrel 8, a mixing device 20 including a number of mixing blades 20 is provided. With the aid of the mixing rod 22, the mixing blades can move axially in the interior of the barrel 8 and can rotate in the interior of the barrel 8 . For this purpose, the mixing rod 22 is guided into the interior of the cartridge 8 via an airtight duct. The mixing rod 22 ends in a handle 24 outside the cartridge 8, by means of which the mixing rod 22 and therefore the mixing blade 20 can be moved manually. The mixing blade 20 may be used to mix the cement powder and the monomer liquid after the monomer liquid has been introduced into the interior of the barrel 8 via the connecting line 9.

[0180] The rear end of the barrel 8 (in Figure 1 to 6 (At the top in the middle) can be closed by means of a two-piece delivery plunger 26, 28. The delivery plungers 26 and 28 are composed of a sterilization plunger 26 and a sealing plunger 28. Sterilization plunger 26 in Figure 1 to 3 Has been inserted into the inside of the barrel 8, and the sealing plunger 28 is Figure 1 to 3 The medium is still separated from the sterilization plunger 26. When the sealing plunger 28 has not been inserted into the sterilization plunger 26, the barrel 8 containing the cement powder inside and inside can be sterilized by means of a sterilization gas such as ethylene oxide. For this purpose, the sterilization plunger 26 has a gas-permeable and powder-impermeable filter 58 which allows gas to enter but prevents cement powder from exiting the interior of the cartridge 8. Next, the sealing plunger 28 can be inserted into the sterilization plunger 26, and the two together form the delivery plungers 26, 28, which can later be used to pass through the front opening or screw into the A delivery tube (not shown) in the front opening drives out the PMMA bone cement ready to be mixed in the inside of the cartridge 8, wherein the delivery plungers 26, 28 are driven forward in the direction of the opening.

[0181] The sterilization plunger 26 has two circumferential seals 30 by means of which the sterilization plunger 26 seals the inner wall of the barrel 8. In addition, the scraper lip 32 is located on the front side of the sterilization plunger 26, and the scraper lip can be used to scrape the mixed PMMA bone cement from the inner wall of the barrel 8 and move it toward the inside of the barrel 8. Front drive. The sealing plunger 28 also has a circumferential seal 34 by means of which the sealing plunger seals the sterilization plunger 26. An additional seal is provided at the sterilization plunger 26 to further seal the connection between the plunger 28 and the sterilization plunger 26. The vacuum port 36 is located in the sealing plunger 28, which is connected to the guide hole via the sealing plunger 28. As a result, the inside of the cartridge 8 can be evacuated even when the sealing plunger 28 is inserted into the sterilization plunger 26. The PMMA bone cement or cement paste in the interior of the cartridge 8 can therefore be mixed under vacuum or reduced pressure in order to reduce the number of possible air inclusions.

[0182] At the bottom side, the device is bounded by a support 38 with a flat bracket on which the device can be placed on a flat surface. In addition, the internal part of the device is enclosed by a housing 40 made of plastic. The hollow cylinder 1 and the housing 40 are formed as an integral piece. Only the cartridge 8 can be separated from the support 38 and the housing 40. The housing 40 and the support 38 can also be collectively regarded as the support 38, 40, because the continuous part formed together forms the lower part of the device, which holds the device when it has been placed in place.

[0183] The filter 42 and/or the screen 42 is arranged in the receptacle 4 below the glass ampoule 5, and the filter and/or the screen intercepts the fragments and fragments of the glass ampoule 5 when the glass ampoule 5 is folded. The inclined surface is located below the filter 42 and/or the screen 42, and the monomer liquid flows along the inclined surface from the opened glass ampoule 5 to the hollow cylinder 1 through the mouth 44, that is, by means of the hollow cylinder 1 and the container. The fluid connection 44 between the seats 4 flows into the hollow cylinder 1. The upper side of the receptacle 4 is closed by a cover 46. A tube 47 made of a flexible synthetic material (such as foam or rubber) is located in the cover 46, and the tube is used to press the glass ampoule 5 onto the edge at the base of the receptacle 4, thereby positioning it in the receptacle 4 .

[0184] The fixed pin 48 is located in the pump plunger 2 as a latch device 48. The fixing pin 48 is provided with a handle, by means of which the fixing pin 48 can be manually withdrawn from the pump plunger 2. The fixing pin 48 is placed so as to pass the pump plunger 2 and prevents the pump plunger 2 from being able to be pressed into the hollow cylinder 1 deeper than the beginning of the hollow cylinder 1. When the pump plunger 2 has been pressed into the hollow cylinder 1 until the fixed pin 48 or the latch device 48 blocks its movement, the joystick 3 pivots around its axis due to the movement of the pump plunger 2 and passes through the pump column The plug 2 is pressed against the deformable side wall 6. For this purpose, the joystick 3 is wide enough or has a web 56 perpendicular to the pivot axis long enough so that the deformation of the deformable side wall 6 is sufficient to fold the glass ampoule 5 in the receptacle 4. The deformable side wall 6 is deformed, and the glass ampoule 5 in the interior of the receptacle 4 is folded. However, the fixing pin 48 still prevents the pump plunger 2 from being pressed further into the hollow cylinder 1. Figure 4 and 5 This scenario is described in

[0185] The hollow cylinder 1 is shaped in such a way that the funnel is at its bottom surface 50 or its base 50, and the mouth leading to the connecting pipeline 9 is located at the lowest point of the funnel. As a result, the base 50 of the hollow cylinder 1 throws the monomer liquid contained therein into the connecting line 9. On its underside 52, the pump plunger 2 is shaped to match the base 50 of the hollow cylinder 1. As a result, the bottom surface 52 of the pump plunger 2 can be used to press almost all the monomer liquid located in the hollow cylinder 1 into the connecting line 9. In addition, the highest point in the hollow cylinder 1 is Figure 4 and 5 In the scenario shown in the figure, the mouth 44 is formed so that air can escape the hollow cylinder 1 through the mouth 44. The monomer liquid from the broken glass ampoule 5 therefore flows into the hollow cylinder 1 via the filter 42 and/or the screen 42 and the mouth 44. However, the monomer liquid will not pass through the apex formed by the loop 10 (if the monomer liquid is not pressed beyond the point by means of the pump plunger 2). This is to prevent the monomer liquid and PMMA bone cement powder from reacting prematurely in the inside of the barrel 8.

[0186] The fixing pin 48 can now be withdrawn from the pump plunger 2. Then, the pump plunger 2 can be pressed deeper in the hollow cylinder 1 to press the monomer liquid into the inside of the barrel 8 via the connecting line 9. The time required to withdraw the fixing pin 48 is sufficient to allow the monomer liquid to flow from the receptacle 4 into the hollow cylinder 1. The pump plunger 2 seals the inner wall of the hollow cylinder 1 by means of two circumferential seals 54 to prevent the monomer liquid from reaching the outside between the pump plunger 2 and the hollow cylinder 1. By fully inserting the pump plunger 2 into the hollow cylinder 1, the monomer liquid is pressed from the hollow cylinder 1 into the inside of the barrel 8, where the monomer liquid can be connected to the bone by means of the mixing device 20 The mixture is mixed. Image 6 Show this situation in. The fixing pin 48 has been withdrawn from the pump plunger 2 and only a hole 59 remains here, in which the fixing pin 48 was previously. While mixing, a vacuum or reduced pressure can be generated in the interior of the barrel 8 by means of the vacuum port 36.

[0187] The PMMA bone cement mixed in the inside of the cartridge 8 can be used by the following operations: unscrew the cartridge 8 from the rest of the device, screw the delivery pipe into the internal thread 16, and insert the cartridge 8 into the dispensing gun ( In a delivery device in the form of a dispenser gun), by means of the delivery device, the delivery plungers 26 and 28 are driven forward in the direction of the front opening, thereby pressing the bone cement ready for mixing from the inside of the cartridge 8. In accordance with Figure 1 to 6 In the first embodiment, the pump plunger 2 is manually actuated, that is, it is pressed into the hollow cylinder 1 by hand.

[0188] Figure 7 to 12 Demonstrate a second alternative example of the device for mixing polymethyl methacrylate bone cement and storing the parent components (specifically, monomer liquid and cement powder) of the bone cement according to the present invention Description of the embodiment, in which the pump plunger 62 is not manually actuated, but is pressed into the hollow cylinder 61 by means of the internal energy storage member 75. This device is also suitable for implementing the method according to the invention.

[0189] The second alternative device includes a hollow cylinder 61 in which a pump plunger 62, which is cylindrical in some areas, is arranged to be axially movable. Can be seen in Picture 9 , 10 The two sections of the pump plunger 62 in the cross-sectional view of and 11 are firmly connected to each other. The pump plunger 62 is therefore made into an integral piece, such as Picture 12 Seen in. An opening device 63 in the form of a lever 63 is installed at the outer side wall of the hollow cylinder 61 so as to be pivotable about an axis perpendicular to the axis direction of the movement of the pump plunger 62. A recess in the form of a window is located in the cylindrical housing of the hollow cylinder 61 in the area of ​​the joystick 63, via which the joystick 63 is in the initial position (see Picture 9 ) Extends into the interior of the hollow cylinder 61. Figure 7 to 9 And 12 show the initial position of the second alternative device, which is defined by the way the joystick 63 is placed and the position of the pump plunger 62.

[0190] Next to the joystick 63, a receptacle 64 for the glass ampoule 65 is provided, into which the glass ampoule 65 has been inserted. The glass ampoule 65 is filled with a monomer liquid (not shown). At its base (at Figure 7 to 9 At the bottom of the middle), the glass ampoule 65 rests on the edge or protrusion. In the area of ​​the window or recess in the hollow cylinder 61, the receptacle 64 is only delimited by a deformable side wall 66 made of rubber or another flexible synthetic material. The lever 63 abuts the deformable side wall 66 via the edge 67 or the wedge 67. The glass ampoule 65 is in the initial position ( Figure 7 to 9 And 12) is not opened. The initial position is therefore suitable for storing monomer liquid or parent components.

[0191] A cartridge 68 including a cylindrical interior is arranged on the other side of the hollow cylinder 61 with the pump plunger 62 immediately. The cement powder (not illustrated) is located in the barrel 68 as the second parent component of the PMMA bone cement. At the bottom side (at Figure 7 to 12 At the bottom of the middle), the barrel 68 is connected to the base of the hollow cylinder 61 by means of a connecting line 69. The connecting line 69 forms a loop 70 between the cartridge 68 and the hollow cylinder 61 which is arranged above the base of the glass ampoule 65. This prevents the monomer liquid from being able to flow directly into the inside of the cartridge 68 when the glass ampoule 65 is opened. The pump plunger 62 is in the initial position ( Figure 7 to 9 And 12) cannot be pressed into the hollow cylinder 61 because the pump plunger 62 is connected to the hollow cylinder 61 by means of a lock 71 as a latch member 71. The pump plunger 62 cannot be pressed into the hollow cylinder 61 until the lock 71 is removed.

[0192] The connecting line 69 leads to the cartridge 68 via a fitting 72. The upper side of the hollow cylinder 61 is closed by a screwed cap 73 which supports a compression spring 75 for actuating the tension of the pump plunger 62. For this purpose, the tensioned compression spring 75 is supported by the cap 73 and the pump plunger 62, and at least Figure 7 to 9 And the initial position shown in 12 and Picture 10 The intermediate position shown in is under compressive stress, so that the pump plunger 62 can move in the hollow cylinder 61 by means of the pressure spring 75 until it stops. Preferably, the compression spring 75 continues to be tensioned at this time. Picture 12 The precise arrangement of the first lock 71 is shown as a schematic cross-sectional view of a partial section of the second device according to the present invention, wherein the cross section runs parallel to the first lock 71 or the latch member 71. The compression spring 75 is preferably composed of spring steel.

[0193] The fitting 72 is provided with an external thread 74 to which the internal thread 76 at the front side of the barrel 68 is screwed. The cartridge 68 is therefore connected to the fitting 72 in a releasable manner. Once the PMMA bone cement has been mixed in the interior of the barrel 68, a delivery tube (not shown) can be screwed into the internal thread 76 through which the mixed-ready PMMA bone cement can be driven out of the barrel 68 And apply it.

[0194] The powder-impermeable and liquid-permeable filter 78 is located in the fitting 72 in the connection line 69 at the connection point to the cartridge 68. This filter 78 prevents the cement powder from falling into the connecting line 69 from the inside of the barrel 68 and reacting there with the monomer liquid, thereby preventing PMMA from blocking the connecting line 69 when it solidifies. The mouth of the connecting line 69 leading to the inside of the cartridge 68 is formed as a nozzle. The nozzle is preferably formed according to US 8 662 736B4.

[0195] In the interior of the barrel 68, a mixing device 80 including a number of mixing blades 80 is provided, with the aid of the mixing rod 82, the mixing blades can move axially in the interior of the barrel 68 and can rotate in the interior of the barrel 68 . For this purpose, the mixing rod 82 is guided into the interior of the cartridge 68 via an airtight duct. The mixing rod 82 ends in a handle 84 on the outside of the barrel 68, by means of which the mixing rod 82 and therefore the mixing blade 80 can be moved manually. The mixing blade 80 may be used to mix the cement powder and the monomer liquid after the monomer liquid has been introduced into the inside of the barrel 68 via the connection line 69.

[0196] The rear end of the barrel 68 (at Figure 7 to 12 (At the top in the middle) can be closed by means of a two-piece delivery plunger 86, 88. The delivery plungers 86 and 88 are composed of a sterilization plunger 86 and a sealing plunger 88. Sterilization plunger 86 in Figure 7 to 9 Has been inserted into the inside of the barrel 68, and the sealing plunger 88 is Figure 7 to 9 The medium is still separated from the sterilization plunger 86. When the sealing plunger 88 has not been inserted into the sterilization plunger 86, the barrel 68 containing the cement powder inside and inside can be sterilized by means of a sterilization gas such as ethylene oxide. For this purpose, the sterilization plunger 86 has a gas-permeable and powder-impermeable filter 118 that allows gas to enter but prevents cement powder from exiting the interior of the barrel 68. Next, the sealing plunger 88 can be inserted into the sterilization plunger 86, and the two together form the delivery plungers 86, 88, which can later be used to pass through the front opening or screw into the A delivery tube (not shown) in the front opening drives out the PMMA bone cement ready to be mixed in the interior of the cartridge 68, with the delivery plungers 86, 88 being driven forward in the direction of the opening.

[0197] The sterilization plunger 86 has two circumferential seals 90 by means of which the sterilization plunger 86 seals the inner wall of the barrel 68. In addition, the scraper lip 92 is located on the front side of the sterilization plunger 86, and the scraper lip can be used to scrape the mixed PMMA bone cement from the inner wall of the barrel 68 and move it toward the inside of the barrel 68. Front drive. The sealing plunger 88 also has a circumferential seal 94 by means of which it seals the sterilizing plunger 86. An additional seal is provided at the sterilization plunger 86 to further seal the connection between the plunger 88 and the sterilization plunger 86. The vacuum port 96 is located in the sealing plunger 88 which is connected to the pilot hole via the sealing plunger 88. As a result, the inside of the cartridge 68 can be evacuated even when the sealing plunger 88 is inserted into the sterilization plunger 86. The PMMA bone cement or cement paste in the interior of the cartridge 68 can therefore be mixed under vacuum or reduced pressure in order to reduce the number of possible air inclusions.

[0198] At the bottom side, the device is bounded by a support 98 with a flat bracket on which the device can be placed on a flat surface. In addition, the internal part of the device is enclosed by a housing 100 made of plastic. The hollow cylinder 61 and the housing 100 are formed as an integral piece. Only the cartridge 68 can be separated from the support 98 and the housing 100. The housing 100 and the support 98 can also be collectively regarded as the support 98, 100, because the continuous part formed together forms the lower part of the device, which holds the device when it has been placed in place.

[0199] The filter 102 and/or the screen 102 is arranged in the receptacle 64 below the glass ampoule 65, and the filter and/or the screen intercepts the fragments and fragments of the glass ampoule 65 when the glass ampoule 65 is folded. The inclined surface is located below the filter 102 and/or the screen 102, and the monomer liquid flows along the inclined surface from the opened glass ampoule 65 to the hollow cylinder 61 through the mouth 104, that is, by means of the hollow cylinder 61 and the container. The fluid connection 104 between the seats 64 flows into the hollow cylinder 61. The upper side of the receptacle 64 is closed by a cover 106. A tube 107 made of a flexible synthetic material (such as foam or rubber) is located in the cover 106, and the tube is used to press the glass ampoule 65 onto the edge at the base of the receptacle 64, thereby positioning it in the receptacle 64 .

[0200] The second lock catch 108 is provided as a latch device 108 in a matching recess in the hollow cylinder 61 and the pump plunger 62. The second lock 108 prevents the pump plunger 62 from being able to be pressed into the hollow cylinder 61 deeper than the mouth 104. Therefore, after the first lock catch 71 has been removed, the pressure spring 75 presses the pump plunger 62 into the hollow cylinder 61 until the pump plunger 62 is held by the second lock catch 108 or held in an intermediate position. Picture 10 Show this position in.

[0201] Both lock catches 71, 108 are equipped with handles, by means of which the lock catches can be manually withdrawn from the recess. In addition, the numbers "1" and "2" are indicated as marks on the handles of the locks 71, 108 to indicate in which order the user should withdraw the two locks 71, 108. When the pump plunger 62 has been pressed into the hollow cylinder 61 by the pressure spring 75 until the second lock 108 or the latch device 108 blocks its movement, the joystick 63 pivots about its axis due to the movement of the pump plunger 62 It rotates and is pressed against the deformable side wall 66 by the pump plunger 62. For this purpose, the lever 63 is wide enough or has a web 116 perpendicular to the pivot axis long enough so that the deformation of the deformable side wall 66 is sufficient to fold the glass ampoule 65 in the receptacle 64. The deformable side wall 66 is deformed, and the glass ampoule 65 in the interior of the receptacle 64 is folded. However, the second lock 108 still prevents the pump plunger 62 from being pressed further into the hollow cylinder 61. Picture 10 This scenario is described in

[0202] The hollow cylinder 61 is shaped in such a way that the funnel is at its bottom surface 110 or its base 110, and the mouth leading to the connecting pipeline 69 is located at the lowest point of the funnel. As a result, the base 110 of the hollow cylinder 61 throws the monomer liquid contained therein into the connection line 69. On its underside 112, the pump plunger 62 is shaped to match the base 110 of the hollow cylinder 61. As a result, the bottom surface 112 of the pump plunger 62 can be used to press almost all the monomer liquid located in the hollow cylinder 61 into the connecting line 69. In addition, the highest point in the hollow cylinder 61 is Picture 10 In the situation shown, the mouth 104 is formed so that air can escape the hollow cylinder 61 through the mouth 104. The monomer liquid from the broken glass ampoule 65 therefore flows into the hollow cylinder 61 via the filter 102 and/or the screen 102 and the mouth 104. However, the monomer liquid will not pass through the apex formed by the loop 70 (if the monomer liquid is not pressed beyond that point by means of the pump plunger 62). This is to prevent the monomer liquid and PMMA bone cement powder from reacting prematurely in the inside of the barrel 68.

[0203] The second lock 108 can now be withdrawn from the pump plunger 62. Then, the pump plunger 62 can be pressed deeper in the hollow cylinder 61 by the pressure spring 75 so as to press the monomer liquid into the inside of the cylinder 68 via the connecting line 69. The time required to withdraw the second lock 108 is sufficient to allow the monomer liquid to flow from the receptacle 64 into the hollow cylinder 61. The pump plunger 62 seals the inner wall of the hollow cylinder 61 by means of two circumferential seals 114 to prevent the monomer liquid from reaching the outside between the pump plunger 62 and the hollow cylinder 61. By fully inserting the pump plunger 62 into the hollow cylinder 61, the monomer liquid is pressed from the hollow cylinder 61 into the inside of the barrel 68, where the monomer liquid can be connected to the bone by means of the mixing device 80 The mixture is mixed. Picture 11 Show this situation in. The second lock 108 has been withdrawn. While mixing, a vacuum or reduced pressure can be generated in the interior of the cartridge 68 by means of the vacuum port 96.

[0204] The PMMA bone cement mixed in the inside of the cartridge 68 can be used by unscrewing the cartridge 68 from the remaining devices, screwing the delivery pipe into the internal thread 76, and inserting the cartridge 68 into a dispensing gun form With the aid of the delivery device, the delivery plungers 86 and 88 are driven forward in the direction of the front opening, thereby pressing the bone cement ready for mixing from the inside of the barrel 68. Compared with the first embodiment, according to Figure 7 to 12 In the second embodiment, therefore, the pump plunger 62 is actuated not manually but by means of a tensioned pressure spring 75, that is, it is pressed into the hollow cylinder 61 by means of a pressure spring 75.

[0205] The features of the present invention disclosed in the above description, claims, drawings, and exemplary embodiments may be related individually and in combination to implement various embodiments of the present invention.

[0206] List of reference numbers

[0207] 1, 61 hollow cylinder

[0208] 2, 62 pump plunger

[0209] 3.63 Open the device / joystick

[0210] 4, 64 seats

[0211] 5.65 glass ampoules

[0212] 6, 66 deformable sidewall

[0213] 7, 67 wedges/edges

[0214] 8, 68 barrel

[0215] 9, 69 Connecting the pipeline

[0216] 10, 70 ring pipe

[0217] 12.72 Accessories

[0218] 14, 74 external thread

[0219] 16, 76 internal thread

[0220] 18.78 Filters that are impermeable to powders and liquids

[0221] 20, 80 mixing blades

[0222] 22, 82 Mixing stick

[0223] 24, 84 handle

[0224] 26, 86 Sterilization plunger

[0225] 28, 88 Seal plunger

[0226] 30, 90 seal

[0227] 32, 92 Scraper lip

[0228] 34, 94 seals

[0229] 36, 96 vacuum ports

[0230] 38, 98 support

[0231] 40, 100 housing

[0232] 42, 102 screen/filter

[0233] 44, 104 to the mouth of the hollow cylinder/fluid connector

[0234] 46, 106 cover

[0235] 47, 107 tubes

[0236] 48 Fixed pin/latch device with handle

[0237] 50, 110 Hollow cylinder base

[0238] 52, 112 The bottom surface of the pump plunger

[0239] 54, 114 Seals

[0240] 56.116 Horizontal parts of the frame/control lever

[0241] 58,118 filters that are gas permeable and powder impermeable

[0242] 59 Pipe

[0243] 71 Lock/Latch member

[0244] 73 Nut

[0245] 75 pressure spring

[0246] 108 lock/latch device