Source: http://www.google.com/patents/US5290260?dq=6,563,928
Timestamp: 2015-06-03 20:05:43
Document Index: 119091863

Matched Legal Cases: ['art 109', 'art 111', 'arts 109', 'arts 109', 'art 177', 'art 178', 'arts 177', 'arts 177']

Patent US5290260 - Rotational pressure drive for a medical syringe - Google PatentsSearch Images Maps Play YouTube News Gmail Drive More »Sign inAdvanced Patent SearchPatentsA rotational pressure drive for filling a medical syringe with a fluid and obtaining, maintaining, and releasing a desired fluid pressure within the syringe. The commercially available medical syringe includes a barrel with a plunger extending therein. Extending laterally and radially about the proximal...http://www.google.com/patents/US5290260?utm_source=gb-gplus-sharePatent US5290260 - Rotational pressure drive for a medical syringeAdvanced Patent SearchPublication numberUS5290260 APublication typeGrantApplication numberUS 07/960,022Publication dateMar 1, 1994Filing dateOct 13, 1992Priority dateMay 31, 1991Fee statusPaidAlso published asUS5160327Publication number07960022, 960022, US 5290260 A, US 5290260A, US-A-5290260, US5290260 A, US5290260AInventorsJoseph R. StinesOriginal AssigneeVance Products IncorporatedExport CitationBiBTeX, EndNote, RefManPatent Citations (8), Referenced by (22), Classifications (6), Legal Events (5) External Links: USPTO, USPTO Assignment, EspacenetRotational pressure drive for a medical syringe
US 5290260 AAbstract
A rotational pressure drive for filling a medical syringe with a fluid and obtaining, maintaining, and releasing a desired fluid pressure within the syringe. The commercially available medical syringe includes a barrel with a plunger extending therein. Extending laterally and radially about the proximal end of the syringe barrel are several flanges. The rotational pressure drive comprises a hollow cylindrical chamber with a partially closed, proximal end with an opening therethrough. The drive further includes an axial extension member extending through the opening in the partially closed end for engaging and urging the proximal end of the syringe plunger toward the partially closed, proximal end. The drive, in another aspect, includes a syringe plunger having a distal and a proximal portion. The distal portion is inserted into the syringe barrel with the proximal portion extending through the opening of the partially closed, proximal portion of the drive. Positioned circumferentially and longitudinally along the chamber are pluralities of internal threads with individual starts for engaging the radially extending flanges of the syringe barrel. The plunger or axial extension member of the drive is pulled toward the partially closed, proximal end of the drive to fill the syringe with fluid. The flanges of the syringe barrel are rotationally engaged with the starts of the internal thread pluralities for advancement into the passageway of the drive. As the hollow chamber of the pressure drive is rotated with respect to the syringe barrel, the plunger is pushed into the syringe barrel to obtain and maintain a desired fluid pressure therein.
1. A rotational pressure drive f or a syringe having a barrel, a plunger positioned through a proximal end of said barrel, and first and second flanges extending radially and laterally from said proximal end of said barrel, comprising:an elongated member having a partially closed end including an opening therein, an open end for reception of said plunger, and a passageway extending longitudinally between said open and partially closed ends for passage of said plunger therethrough; axial extension means moveable through said opening of said partially closed end for pulling said plunger through said passageway toward said partially closed end; and first and second pluralities of internal threads extending radially into and longitudinally along said passageway forming means for engaging said first and second flanges, respectively. 2. The drive of claim 1 wherein the internal threads of said first and second pluralities are positioned alternatingly between each other.
11. The drive of claim 1 further comprising a plurality of reinforcements extending longitudinally about an outer surface of said drive.
12. A method of controlling the pressure in a syringe with said drive of claim 1, said syringe having a barrel, a plunger positioned through a proximal end of said barrel, and first and second flanges extending radially and laterally from said proximal end of said barrel, said method comprising the steps of:engaging said plunger with said axial extension means; engaging said first and second flanges with said first and second pluralities of internal threads, respectively; pulling said plunger toward said partially closed and with said axial extension means; and rotating said elongated member with respect to said syringe to engage said plunger with said partially closed end of said elongated member. 13. The method of claim 12 wherein said pulling includes filling said barrel with a fluid.
14. A rotational pressure drive for a syringe having a barrel and first and second flanges extending radially and laterally from a proximal end of said barrel, comprising:a plunger having a distal portion, a proximal portion, and a radial projection extending laterally therefrom between said distal and proximal portions; an elongated member having a partially closed end including an opening therein for extension of said distal portion of said plunger therethrough and forming means for engaging said radial projection of said plunger, an open end for reception of said plunger, and a passageway extending longitudinally between said open and partially closed ends for passage of said plunger therethrough; and a plurality of internal threads having first and second starts forming means for engaging respectively said first and second flanges. 15. The drive of claim 14 wherein each thread of said plurality has a predetermined height, a crest having a predetermined thickness, and a root having a predetermined width.
16. The drive of claim 14 wherein each thread of said plurality further includes a flank surface having a predetermined flank angle.
17. A method of controlling the pressure in a syringe with said drive of claim 14, said syringe having a barrel and first and second flanges extending radially and laterally from a proximal end of said barrel, said method comprising the steps of:inserting said distal portion of said plunger into said barrel of said syringe; engaging said first and second flanges with said first and second pluralities of internal threads, respectively; pulling said proximal portion of said plunger through said opening of said partially closed end of said elongated member; and rotating said elongated member with respect to said syringe to engage said radial projection of said plunger with said partially closed end of said elongated member. 18. The method of claim 17 wherein the step of pulling includes filling said barrel with a fluid.
19. The method of claim 17 wherein the step of rotating said elongated member includes threading said flanges into said passageway of said drive.
20. A rotational pressure drive and syringe, comprising:a barrel having a proximal end and first and second flanges extending radially and laterally from said proximal end of said barrel, a plunger having a distal portion positioned in said barrel, a proximal portion, and a radial projection extending laterally therefrom between said distal and proximal portions, said proximal portion having an end cap at a proximal end thereof; an elongated member having a partially closed end including an opening for extension of said proximal portion therethrough and forming means f or engaging said radial projection of said plunger between said distal and proximal portions, an open end for reception of said plunger, and a passageway extending longitudinally between said open and partially closed ends for passage of said plunger therethrough; and first and second pluralities of alternatingly positioned internal threads extending radially into and longitudinally along said passageway engaging said first and second flanges, respectively, and including respective first and second starts positioned opposite each other about said open end, each thread of said first plurality including a first flank surface having a first predetermined flank angle, a first crest having a first predetermined thickness, and a first predetermined height, each thread of said second plurality including a second flank surface having a second predetermined flank angle, a second crest having a second predetermined thickness, and a second predetermined height, adjacent threads of said first and second pluralities including a root therebetween having a predetermined width; a plurality of reinforcements extending longitudinally about an outer surface of said drive; and first and second expansion pins extending through said elongated member near said open end and into said passageway. Description
This application is a continuation-in-part of pending application Ser. No. 07/708,673, filed May 31, 1991 now U.S. Pat. No. 5,160,327.
This invention relates generally to medical devices for obtaining, maintaining, and releasing fluid pressures in a syringe and, in particular, to a device for threadably engaging the external flanges of a syringe for obtaining high fluid pressures in the syringe chamber.
High fluid pressures are required for the inflation of balloons used in medical procedures such as angioplasty and radial dilation of the urethra. The balloons are typically inflated for an extended period of time using a syringe filled with fluid. However, maintaining high fluid pressures for an extended period of time is difficult by simply applying manual force to a commercially available syringe.
One approach to this problem is to use a custom-made or modified syringe. All of these syringes commonly include an outer, internally threaded member and an inner, externally threaded member f or rotational advancement of the plunger in a syringe barrel.
Another disadvantage of these prior art devices is that the plunger of the syringe must be disengaged from the device to fill the syringe barrel. Alternatively, these threaded devices must be rotated to withdraw the plunger from the distal end of the barrel to fill the syringe with fluid. This is particularly annoying and time consuming when the technician or physician has initially engaged the pressure device with the syringe and forgot to initiate filling of the syringe barrel with fluid.
The foregoing problems are solved and a technical advance is achieved in an illustrative rotational pressure drive for engaging a standard, commercially available medical syringe and obtaining, maintaining, and releasing a desired fluid pressure therein. The drive comprises an elongated member such as a hollow cylindrical chamber having a passageway extending longitudinally between a closed end for engaging the proximal end of the syringe plunger and an open end for receiving the plunger and extending it through the passageway to the closed end. The drive further includes first and second pluralities of internal threads extending radially into and longitudinally along the passageway for engaging the flanges extending radially and laterally from the proximal end of the syringe barrel. Use of the pressure drive involves fully extending the plunger proximally from the syringe barrel and inserting the extended plunger into the open end of the drive, through the passageway, and to the closed end. The syringe barrel flanges engage the individual starts of the first and second pluralities of internal threads. The drive is then advantageously rotated with respect to the syringe barrel to thread the flanges into the passageway of the drive and to push the plunger into the syringe barrel. As the plunger is pushed into the syringe barrel, the fluid pressure within the barrel is increased. Any desired pressure may be maintained in the barrel depending on how far the flanges of the syringe are threaded into the passageway of the drive. A pressure limiting assembly is attached to the distal end of the syringe barrel, which releases fluid from the syringe when a threshold pressure is obtained.
The foregoing problems of filling a syringe barrel with a fluid are solved and a technical advance is achieved in an illustrative rotational pressure drive for engaging a standard, commercially available medical syringe and obtaining, maintaining, and releasing a desired fluid pressure therein. The pressure drive comprises an elongated member having a partially closed end including an opening therein and an axial extension member movable through the opening of the partially closed end for pulling the plunger through the passageway of the elongated member toward the partially closed end. Pulling the plunger through the passageway toward the partially closed end advantageously facilitates filling the syringe barrel with a fluid without having to operate any other portion of the pressure device. The drive also comprises pluralities of internal threads for engaging the radially and laterally extending flanges of the syringe.
The method of controlling the pressure in the syringe with the aforementioned drive includes engaging the plunger of the syringe with the axial extension member, engaging the flanges of the syringe with the internal threads, and pulling the plunger toward the partially closed end of the elongated member with the axial extension member. The method also includes rotating the elongated member of the drive with respect to the syringe to engage the plunger with the partially closed end of the elongated member. The step of pulling the plunger with the axial extension member further includes advantageously filling the barrel with a fluid without having to rotate or disengage the internal threads of the drive with the syringe flanges.
In another aspect of the rotational pressure drive of the present invention, the drive comprises a plunger having a distal portion, a proximal portion, and a radial projection extending laterally therefrom between the distal and proximal portions. The elongated member of the drive has a partially closed end including an opening therein for extension of the proximal portion of the plunger therethrough. The partially closed end and opening form means for engaging the radial projection of the plunger and controlling the pressure of a fluid in the syringe barrel. The radial projection also permits the syringe barrel to be readily filled with a fluid without again having to disengage the plunger from the pressure drive or rotating the internal threads of the drive with respect to the syringe barrel flanges. The method of controlling the pressure in a syringe with this aspect of the invention includes the steps of inserting the distal portion of the plunger into the barrel of the syringe, engaging the flanges of the barrel with the internal threads of the elongated member, and pulling the proximal portion of the plunger through the opening of the partially closed end of the elongated. The method of controlling the pressure also includes rotating the drive with respect to the syringe to engage the radial projection of the plunger with the partially closed end of the elongated member. The step of pulling the proximal portion of the plunger through the partially closed end includes advantageously filling the barrel with a fluid without having to disengage the syringe barrel with the threads of the drive.
FIG. 6 depicts a partial, cross-sectional view of the pressure relief assembly of FIG. 1 attached to the distal end of a medical syringe;
FIG. 7 depicts an enlarged partial cross-sectional view of the piston and cylinder of the pressure relief assembly of FIG. 6;
FIG. 8 depicts a partially sectioned side view of another aspect of the rotational pressure drive of the present invention;
FIG. 9 depicts the disassembled proximal end of the plunger of the pressure drive of FIG. 8;
FIG. 10 depicts the assembled proximal end of the plunger of FIG. 8;
FIG. 11 depicts a partially sectioned side view of still another aspect of the rotational pressure drive of the present invention;
FIG. 12 depicts a pictorial view of the distal end of the axial extension member of the pressure drive of FIG. 11; and
FIG. 13 depicts the rotational pressure drive of FIG. 11 with the axial extension member thereof engaging the proximal, partially closed end of the drive.
Syringe 101 is a standard, well-known, and commercially available 10 cc syringe from Becton Dickinson & Company, Rutherford, New Jersey. This syringe has an outer barrel diameter of approximately , 0.630" with an overall length of 3.75". Flanges 112 and 113 extend an equal distance laterally and radially from the proximal end of the barrel and have a maximum cross-sectional dimension of 1.107" and a minimum cross-sectional dimension of 0.74". The overall length of plunger 102 is approximately 4" with the crisscrossed elongated members being approximately 0.500" in width. The disk-like flange 118 has a diameter of approximately 0.730".
FIG. 2 depicts an end view of drive 100 looking into open distal end 106 of elongated member 104 through longitudinal passageway 107 toward closed proximal end 105. Also depicted are first plurality of internal threads 108 with first start 109 and second plurality of internal threads 110 with second start 111. As previously indicated, starts 109 and 111 are diametrically opposite each other in the passageway about distal open end 106 of the drive. Extending f rom closed proximal end 105 into hollow longitudinal passageway 107 is pivot projection 115 for engaging and pushing against the proximal end of the plunger and, in particular, the disk-like plunger flange. As the drive is rotated with respect to the barrel, the plunger flange pivots about projection 115 without deforming or twisting the plunger. Also shown is elongated member wall 131 with a plurality of longitudinally positioned reinforcement ribs 132 positioned about external surface 133 of the member. The thickness of wall 131 is approximately 0.050". Longitudinal passageway 107 has a major diameter 142 of approximately 1.134" and a minor diameter 143 of approximately 0.774".
Rotational pressure drive 100 is molded from a commercially available medical grade nylon material. The overall length of the drive is approximately 3.375" with an outside surface diameter of 1.238". The six reinforcement ribs 132 are each comprised of a 0.187" diameter semicircular longitudinal rib which are spaced equally around and longitudinally along the outer surface 133 of the elongated member, which extends longitudinally for approximately 3.0". The outside diameter of closed proximal end 105 is approximately 1.017", which is annularly recessed from the outer surface of the drive and extends longitudinally for approximately 0.285".
FIG. 3 depicts a partial, longitudinal, cross-sectional profile view of internal threads 134 and 135 of first plurality 108 and internal threads 136 and 137 of second plurality 110. Internal threads 134 and 135 of plurality 108 include respective crests 138 and 139 with a thickness of approximately 0.034" to 0.035". Crests 140 and 141 of respective internal threads 136 and 137 of second plurality 110 are also approximately 0.034" to 0.035" in thickness. Height 160 of internal threads 134-137 is equal to half the difference between major and minor diameters 142 and 143, which is approximately 0.180". Pitch 161 between internal threads 134 and 136 is approximately 0.125", whereas pitch 162 between internal threads 134 and 135 of first plurality 108 is approximately 0.250". Roots 144-146 are approximately 0.081" in width. However, the width of roots 144 and 145 may independently vary depending on the thickness of syringe barrel flanges 112 and 113. The width of internal threads 134-137 at diameter 142 of the passageway is approximately 0.044". Leading flank surfaces 147-150 of respective threads 134-137 each have a well-known flank angle 163 of approximately 2 degrees as opposed to an Acme flank angle of approximately 14.5 degrees. This angle can preferably range from 1.8 to 2.2 degrees for a 10 cc Becton and Dickinson syringe. Pressure flank surfaces 151-154 of respective internal threads 134-137 each have a predetermined flank angle 164 of approximately 2 degrees, again in contrast to a 14.5 degree Acme flank surface angle. Again, depending on the type of flanges utilized, the leading and pressure flank surfaces may have different flank angles as well as having different leading and pressure flank angles on each of the two internal thread pluralities. Alternatively, internal thread pluralities 108 and 110 may also be considered as a single plurality of threads with multiple starts 109 and 111. The aforedescribed thread profile clearly constitutes a departure and modification from that of an Acme thread profile with dual starts and equal width crests and roots. The reader is referred to Machinery's Handbook, Twenty-first and Twenty-third Editions, Industrial Press Incorporated, New York, New York, for a more detailed description of the terms utilized herein to describe the internal threads and their constituent parts. Many of the definitions contained therein to describe thread parts are hereby incorporated by reference.
FIG. 6 depicts pressure relief assembly 120 attached to distal end 121 of syringe 101 via syringe connector 122 and assembly connector 124. Extending through end cap 126 is inflation tube 125, which communicates with the interior of an angioplasty balloon or other medical dilation device (not shown) . As the pressure of fluid 157 in chamber 156 of the syringe increases, a force is exerted against distal end 158 of pressure relief piston 127. When the fluid pressure exceeds the counteracting force exerted by actuation spring 128, the piston is pushed toward end cap 129 releasing fluid 157 around piston 127 and through cylinder 123 and aperture 159 of end cap 129 until the fluid pressure and spring force are once again equal.
FIG. 8 depicts a partially sectioned side view of rotational pressure drive 165, which represents another aspect of the present invention. Pressure drive 165 is positionable about and rotationally engageable with commercially available, 10 cc syringe 166 for pushing drive plunger 167 into syringe barrel 168 to control the pressure of fluid 169 contained within the barrel. The drive comprises elongated member 170, such as a hollow cylindrical chamber that was described previously, having a partially closed, proximal end 171 with opening 172 therethrough. The elongated member also includes open distal end 173 and hollow passage 174 extending between the proximal and distal ends for receiving and extending drive plunger 167 therethrough. The drive also includes a first plurality of internal threads 175 with start 177 and a second plurality of internal threads 176 with start 178 for engaging diametrically opposed syringe barrel flanges 179 and 180. These flanges extend radially and laterally from proximal end 181 of syringe barrel 168. The first and second plurality of internal threads with their respective starts form means for engaging respectively the laterally extending flanges of the syringe barrel. The rotational pressure drive also includes plunger 167 having a distal portion 182 and a proximal portion 183. The plunger also includes a radial projection 184 extending laterally therefrom between the distal and proximal portions for engaging partially closed, proximal end 171 for forcing distal end 186 of the plunger into chamber 187 of the syringe barrel. As the distal end of the plunger is urged into the syringe barrel chamber with the rotation of the drive about flanges 179 and 180 of the syringe barrel, fluid 169 in syringe barrel chamber 187 is compressed, thereby increasing the pressure of the fluid in the chamber. Partially closed end 171 of the elongated member and opening 172 therein form means for engaging radial projection 184 of the plunger.
Each thread of the plurality of internal threads 175 and 176 has a predetermined height, a crest having a predetermined thickness, and a root having a predetermined width as previously discussed with respect to the embodiment of FIG. 3. Each thread of the plurality of internal threads further includes a flank surface having a predetermined flank angle as also discussed with the embodiment depicted in FIG. 3. Furthermore, the alternatingly positioned internal threads of pluralities 175 and 176 include respective starts 177 and 178 positioned opposite each other about open end 173 of the elongated member of the drive. The pluralities of internal threads comprise a first and a second continuous helix of which the internal threads are positioned alternatingly between each other. Passageway 174 of elongated member 170 includes a major diameter and a minor diameter similar to the major and minor diameters 142 and 143 as depicted in and described with respect to FIG. 2. Again, the properties of the internal threads are similar to and variable as described with respect to internal threads 108 and 110 depicted in FIGS. 1-5. The drive further includes well-known expansion retaining pins 185 positioned as shown in FIG. 8 for maintaining syringe flanges 179 and 180 in passageway 174 of elongated member 170.
Rotational pressure drive 165 also includes a rotational control collar 188 threadably engaging distal end 189 of syringe barrel 168. The rotational control collar maintains purchase of the syringe barrel as the pressure drive is rotated in a clockwise manner for urging plunger 167 into syringe barrel chamber 187.
Plunger 168 of the pressure drive includes proximal end cap 190 positioned at proximal end 191 of the plunger. During assembly of the pressure drive, proximal plunger portion 183, without end cap 190, is positioned through opening 172 in partially closed, proximal end 171 of the elongated member. Once positioned through opening 172, proximal end cap 190 is snap fitted in a well-known manner onto longitudinally slotted proximal end 191 of the plunger.
FIG. 9 depicts a side view of disassembled proximal end 191 of plunger 167 of FIG. 8 with partially sectioned end cap 190. Proximal portion 183 of plunger 167 includes longitudinal slot 192 extending centrally into the plunger from proximal end 191. This provides for the radial compression of plunger members 193 and 194 inwardly to pass through ridged opening 195 of end cap 190. Extending into opening 195 is annular ridge 196 which engages annular recess 197 circumferentially positioned around proximal portion 183 near proximal end 191 and longitudinal slot 192. Proximal end cap 190 is snap fitted over the proximal end of the plunger in a well-known manner as depicted in FIG. 10.
FIG. 10 depicts a partially sectioned side view of assembled proximal end 191 of proximal plunger portion 183 of FIG. 8 with proximal end cap 190 positioned thereon.
The method of manually filling and controlling the pressure of a fluid such as 186 in a syringe barrel with drive 165 includes the following. Distal portion 182 of plunger 167 is inserted into syringe barrel 168. Elongated member 170 is urged toward the syringe barrel so that internal thread pluralities 175 an 176 with respective starts 177 and 178 of elongated member 170 engage laterally and radially extending flanges 179 and 180 of the syringe barrel. Proximal portion 183 of the plunger is pulled through opening 172 of partially closed end 171 of the elongated member to draw fluid 169 into chamber 187 of the barrel. Elongated member 170 of the drive is rotated with respect to syringe 167 to engage radial projection 184 of the plunger with the partially closed end of the elongated member. As elongated member 170 of the pressure drive is rotated with respect to the syringe barrel, distal end 186 of the plunger is urged into syringe barrel chamber 187 to compress fluid 169 and increase the pressure thereof. The rotation of the drive with respect to the syringe includes threading the flanges into the internal thread pluralities that extend into the passageway of the elongated member. Pulling the plunger through the opening of the partially closed end of the elongated member also fills the barrel chamber with fluid 169 as previously suggested.
FIG. 11 depicts rotational pressure drive 198, which represents still another aspect of the present invention for engaging and pushing syringe plunger 199 into a syringe barrel to control the pressure of a fluid contained therein. Rotational pressure drive 198 comprises elongated member 200 having a partially closed, proximal end 201 with opening 202 formed therethrough. Elongated member 200, such as a hollow chamber, includes open distal end 203 for reception of proximal end 204 of the plunger. The elongated member includes passageway 205 extending longitudinally between the open and partially closed ends for passage of the plunger therethrough. Internal thread pluralities 206 and 207 as previously described, extend radially into and longitudinally along the passageway, which forms means for engaging the radially extending flanges of a syringe barrel. Rotational pressure drive 198 also includes an axial extension member 208, which is movable through opening 202 of the partially closed, proximal end for engaging proximal end 204 of the plunger and pulling the plunger toward the partially closed, proximal end of the elongated member. The properties of the internal thread pluralities are as previously described. The axial extension member includes a proximal end cap 209 positioned at proximal end 210 of the extension member. Proximal end 210 of the extension member 208 is inserted through opening 202 of partially closed, proximal end 201 of the elongated member, and end cap 209 is snap fitted thereon in a well-known manner and as previously described with respect to FIGS. 8-10. Enlarged distal end 211 of the extension member includes a distal end chamber 212 with a U-shaped, distal opening 213 communicating with the chamber to form a well-known T-slot extending therein from the distal end thereof. Proximal end cap 204 of the plunger is inserted into the T-slot for pulling the plunger through the passageway through the partially closed, proximal end of the elongated member. Chamber 212 also includes projection 214 extending into the chamber, as depicted in FIG. 11, for engaging distal end cap 204 of plunger 199.
FIG. 12 depicts a pictorial view of enlarged distal end 211 of axial extension member 208 of the rotational pressure drive. T-slot chamber 212 is shown with U-shaped, distal end opening 213 leading thereto. Projection 214 is shown extending into the chamber, again, for engaging proximal end cap 204 of the plunger, so as to allow the plunger end cap to rotate without distortion as elongated member 200 is threaded onto the flanges of the syringe barrel.
FIG. 13 depicts a partially sectioned side view of rotational pressure drive 198 of FIG. 11 with axial extension member 208 extending through opening 202 of partially closed, proximal end 201 of the chamber. Enlarged distal end 211 of the axial extension member has distal end cap 204 of syringe plunger 199 cradled in T-slot chamber 212. The enlarged distal end of the axial extension member along with the distal end cap of the syringe plunger is depicted engaging the partially closed, proximal end 201 of elongated member 200. In this position, distal end 215 of the syringe plunger is shown fully withdrawn, having pulled fluid 216 into chamber 217 of syringe barrel 218. Internal thread pluralities 206 and 207 engage laterally and radially extending flanges 219 and 220 of the syringe barrel.
The method of manually filling and controlling the pressure in syringe barrel 218 with rotational pressure drive 198 includes the steps of engaging plunger 199 with axial extension member 208. In particular, enlarged distal end 211 of the extension member is extended from open end 203 of elongated member 200, and distal end cap 204 of syringe plunger 199 is inserted into T-slot chamber 212. The method further includes respectively engaging internal thread pluralities 206 and 207 with flanges 219 and 220 of the syringe barrel by the longitudinal and rotational movement of elongated member 200 of the drive. Axial extension member 208 is grasped and pulled by an attendant to pull plunger 199 into passageway 205 and toward partially closed, proximal end 201 to fill syringe barrel chamber 217 with fluid 216. Elongated member 200 of the drive is then rotated with respect to the syringe to engage the plunger with the partially closed end of the elongated member. Once engaged, the elongated member of the drive is further rotated with resect to the syringe barrel to urge distal end 215 of the syringe plunger into the syringe barrel chamber. As a result, fluid 216 in syringe barrel chamber 217 is compressed and the pressure thereof increased.
It is to be understood that the above-described rotational pressure drive is merely an illustrative embodiment of the principles of this invention and that other rotational pressure drives may be devised by those skilled in the art without departing from the spirit and scope of this invention. In particular, the height of the threads as well as the root and crest may be varied according to the length, width, and thickness of the radially extending syringe flanges. These may be varied to accommodate two or more flanges with a corresponding number of starts and pluralities of internal threads within the passageway of the hollow elongated member. It is also contemplated that the threads about the open end of the chamber may be spaced closer together to provide less force to initiate the initial progress of the syringe plunger in the syringe barrel. As the pressure in the syringe barrel is increased, the threads positioned further in the passageway of the drive may be spread apart to provide greater longitudinal movement through the hollow passageway. In the preferred embodiment, one rotation of the drive corresponds to a decrease in the volume of the fluid within the syringe barrel of 1 cc. The pitch of the threads may be lengthened or shortened to vary the amount of fluid compression within the syringe barrel. It is also contemplated that the actuation spring of the pressure relief assembly may also be varied to provide different threshold release pressures along with other pressure relief mechanisms being attached to the distal end of the syringe barrel. In the preferred embodiment, the rotational pressure drive has been designed for a commercially available and commonly used 10 cc syringe. The dimensions of the drive may be varied to accommodate any commercially available syringe without any modification to the syringe, therefore making the use of this drive very economical and efficient without having to modify the structure of the syringe in any aspect. It is also contemplated that other forms of multiple start threads, such as the buttress, square, and other threads or combinations thereof may also be modified for the rotational pressure drive. The plunger of the syringe can be engaged with any type of axial extension member to draw the plunger and f ill the syringe barrel with fluid. The drive can also be fabricated to include any type of plunger insertable into a commercially available syringe barrel that can also be pulled or drawn through the partially closed end of the drive to f ill the syringe barrel with fluid.
Patent CitationsCited PatentFiling datePublication dateApplicantTitleUS2461211 *Jul 13, 1943Feb 8, 1949John S LearDispensing containerUS4634431 *May 16, 1983Jan 6, 1987Whitney Douglass GSyringe injectorUS4738826 *Jan 29, 1986Apr 19, 1988Harris Arthur MReagent metering and delivery deviceUS4743230 *Sep 5, 1985May 10, 1988Advanced Cardiovascular Systems, Inc.Inflating and deflating device for balloon dilatation cathetersUS4758223 *Dec 24, 1986Jul 19, 1988Schneider-Shiley (Usa) Inc.Inflation device for angioplasty catheterUS4919121 *Feb 6, 1989Apr 24, 1990Schneider (Usa) Inc., A Pfizer CompanyInflation device for angioplasty catheterUS4940459 *Oct 12, 1988Jul 10, 1990Mallinckrodt, Inc.Inflation device for balloon catheterUS5137514 *Nov 1, 1990Aug 11, 1992Accumed Systems, Inc.Inflation syringe assembly for percutaneous transluminal angioplasty* Cited by examinerReferenced byCiting PatentFiling datePublication dateApplicantTitleUS6106496 *Jun 15, 1998Aug 22, 2000Socite D'etudes Et D'applications TechBalloon inflating deviceUS6110151 *Aug 13, 1998Aug 29, 2000Namic Usa CorporationInflation deviceUS6793660Aug 20, 2001Sep 21, 2004Synthes (U.S.A.)Threaded syringe for delivery of a bone substitute materialUS6916308Jun 6, 2001Jul 12, 2005Cook IncorporatedHigh pressure injection syringeUS7186241Oct 3, 2002Mar 6, 2007Medical Instill Technologies, Inc.Syringe with needle penetrable and laser resealable stopperUS7207971Dec 23, 2002Apr 24, 2007Boston Scientific Scimed, Inc.Pressure relief devices for use with balloon cathetersUS7226231Jul 16, 2004Jun 5, 2007Medical Instill Technologies, Inc.Piston-type dispenser with one-way valve for storing and dispensing metered amounts of substancesUS7290573Aug 1, 2005Nov 6, 2007Medical Instill Technologies, Inc.Dispenser with sealed chamber, one-way valve and needle penetrable and laser resealable stopperUS7371241Feb 12, 2002May 13, 2008Modmed Therapeutics, Inc.Multi-use surgical cement dispenser apparatus and kit for sameUS7572263 *Nov 20, 2002Aug 11, 2009Arthrocare CorporationHigh pressure applicatorUS7604618Jun 23, 2005Oct 20, 2009Cook IncorporatedHigh pressure injection syringeUS7641668May 16, 2003Jan 5, 2010Scimed Life Systems, Inc.Fluid delivery system and related methods of useUS7779609Mar 5, 2007Aug 24, 2010Medical Instill Technologies, Inc.Method of filling a deviceUS7802692 *Jan 15, 2004Sep 28, 2010Three R Produce, Inc.Device for and method of fastening two component membersUS8123756 *Mar 6, 2006Feb 28, 2012Neurotherm, Inc.High pressure delivery systemUS8147511Nov 20, 2009Apr 3, 2012Boston Scientific Scimed, Inc.Fluid delivery system and related methods of useUS8192397Jun 21, 2006Jun 5, 2012Medrad, Inc.Medical fluid injection and inflation systemUS8412310Sep 18, 2009Apr 2, 2013United Medical Innovations, Inc.Locking syringe with integrated bias memberUS8506572May 12, 2008Aug 13, 2013Carefusion 2200, Inc.Multi-use surgical cement dispenser apparatus and kit for sameUS8628555Feb 23, 2012Jan 14, 2014Boston Scientific Scimed, Inc.Fluid delivery system and related methods of useUS20130043282 *Apr 19, 2011Feb 21, 2013Noviscens AbSyringe dispenser, stand and application plate for said syringe dispenser and method for its useWO2006079270A1 *Oct 24, 2005Aug 3, 2006Tang NingA microfluid continuous deliver device* Cited by examinerClassifications U.S. Classification604/224, 604/920, 222/390International ClassificationA61F2/958Cooperative ClassificationA61M25/1018European ClassificationA61M25/10ELegal EventsDateCodeEventDescriptionMay 17, 2011ASAssignmentOwner name: COOK MEDICAL TECHNOLOGIES LLC, INDIANAFree format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNORS:COOK INCORPORATED;WILSON-COOK MEDICAL INCORPORATED;VANCEPRODUCTS INCORPORATED;AND OTHERS;SIGNING DATES FROM 20110315 TO 20110322;REEL/FRAME:026287/0923Jun 30, 2005FPAYFee paymentYear of fee payment: 12Aug 29, 2001FPAYFee paymentYear of fee payment: 8Aug 26, 1997FPAYFee paymentYear of fee payment: 4Oct 13, 1992ASAssignmentOwner name: VANCE PRODUCTS INCORPORATED D/B/A COOK UROLOGICAFree format text: ASSIGNMENT OF ASSIGNORS INTEREST.;ASSIGNOR:STINES, JOSEPH R.;REEL/FRAME:006311/0048Effective date: 19921009RotateOriginal ImageGoogle Home - Sitemap - USPTO Bulk Downloads - Privacy Policy - Terms of Service - About Google Patents - Send FeedbackData provided by IFI CLAIMS Patent Services