Patents by Inventor Anthony J. Madison
Anthony J. Madison has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).
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Patent number: 11058849Abstract: A multilumen catheter assembly includes a unitary portion and at least two distal end tubes extending distally from the unitary portion. The unitary portion includes an exterior having a generally circular shape in cross section and is attached to the at least two distal end tubes. In one embodiment, the catheter assembly may be made by extruding a unitary tube having internal longitudinally extending lumens, then splitting the unitary tube at a distal end portion of the unitary tube to form the at least two distal end tubes. The at least two distal end tubes are then ground and polished. In another embodiment, the catheter assembly may be made by extruding the at least two distal end tubes and permanently bonding proximal ends thereof to form the unitary portion.Type: GrantFiled: January 26, 2007Date of Patent: July 13, 2021Assignee: Medical Components, Inc.Inventors: Donald A. Schon, Anthony J. Madison, Timothy M. Schweikert
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Patent number: 8241245Abstract: A co-axial catheter assembly including a first lumen having a first distal end and a first proximal end, and a second lumen having a second distal end and a second proximal end. The second lumen extends co-axially with the first lumen, wherein the second lumen is at least partially disposed within the first lumen and the second distal end extends distally of the first distal end. A catheter hub provides for fluid connections of the inner and outer lumens with respective extension tubes, and includes spacers that maintain the proximal end of the inner lumen concentrically within the proximal end of the outer lumen and the distal end of the inner lumen concentrically within the distal end of the outer lumen, respectively. Methods of manufacturing and of inserting the catheter are also disclosed.Type: GrantFiled: October 8, 2004Date of Patent: August 14, 2012Assignee: Medical Components, Inc.Inventors: David F. Markel, Earl W. Voorhees, Jr., Anthony J. Madison, Timothy Schweikert, Mahase Nardeo, Mark Fisher
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Patent number: 8226633Abstract: A co-axial catheter assembly (100), including a first lumen (110) having a first distal end (114) and a first proximal end (112), and a second lumen (120) having a second distal end (124) and a second proximal end (122). The second lumen (120) extends co-axially with the first lumen (110), wherein the second lumen is at least partially disposed within the first lumen and the second distal end extends distally of the first distal end. A method of manufacturing the catheter is also disclosed.Type: GrantFiled: November 4, 2009Date of Patent: July 24, 2012Assignee: Medical Components, Inc.Inventors: David F. Markel, Timothy Schweikert, Mark S. Fisher, Earl Voorhees, Jr., Mahase Nardeo, Anthony J. Madison
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Patent number: 7981093Abstract: A method of making a multilumen catheter assembly to include a unitary portion and at least two distal end tubes extending distally from the unitary portion. The unitary portion includes an exterior having a generally circular or oval shape in cross section and includes at least two distal end tubes of generally semi-circular (or other) cross sectional shape extending longitudinally therethrough. The catheter assembly may be made by extruding a unitary tube having internal longitudinally extending lumens (of semi-circular or other shape), then splitting the tube on its distal end portion to form distal end tubes. The tubes are then ground and polished, the finished tubes retaining in combination the cross sectional shape of the unitary extrusion, or the finished tubes can each be finished to another cross sectional shape, or the finished tubes could include a combination of cross sectional shapes over their longitudinal lengths.Type: GrantFiled: September 24, 2003Date of Patent: July 19, 2011Assignee: Medical Components, Inc.Inventors: Donald A. Schon, Anthony J. Madison, Timothy M. Schweikert
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Publication number: 20100043196Abstract: A co-axial catheter assembly (100), including a first lumen (110) having a first distal end (114) and a first proximal end (112), and a second lumen (120) having a second distal end (124) and a second proximal end (122). The second lumen (120) extends co-axially with the first lumen (110), wherein the second lumen is at least partially disposed within the first lumen and the second distal end extends distally of the first distal end. A method of manufacturing the catheter is also disclosed.Type: ApplicationFiled: November 4, 2009Publication date: February 25, 2010Applicant: Medical Components, Inc.Inventors: David F. Markel, Earl W. Voorhees, JR., Anthony J. Madison, Timothy Schweikert, Mahase Nardeo, Mark Fisher
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Patent number: 7018374Abstract: A multilumen catheter assembly is provided, which includes a unitary portion and at least two distal end tubes extending distally from the unitary portion. The unitary portion includes an exterior having a generally round or oval shape in cross section and includes at least two distal end tubes of generally circular (or other) cross sectional shape extending longitudinally therethrough. The catheter assembly may be made by extruding a unitary tube having internal longitudinally extending lumens (of circular or other shape), then splitting the tube on its distal end portion to form distal end tubes. The tubes are then ground and polished, the finished tubes retaining in combination the generally oval cross sectional shape of the unitary extrusion, or the finished tubes can each be finished to a circular, or other, cross sectional shape; or the finished tubes could include a combination of cross sectional shapes over its longitudinal length.Type: GrantFiled: September 11, 2003Date of Patent: March 28, 2006Assignee: Medical Components, Inc.Inventors: Donald A. Schon, Anthony J. Madison, Timothy M. Schweikert
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Patent number: 6719749Abstract: A multilumen catheter assembly and methods for making and inserting the same are provided. The catheter assembly includes a unitary catheter and at least two distal end tubes which extend distally from the unitary catheter. The at least two lumens in the unitary catheter are in fluid communication with passageways through the distal end tubes. The catheter assembly may be made by extruding a unitary catheter tube having internal longitudinally extending lumens, then splitting the tube on its distal end portion to form distal end tubes. The tubes are then ground and polished to form a smooth surface on the exterior of the tubes. The catheter assembly may also be made by forming an outer layer on at least two longitudinally extending catheters while leaving two distally extending portions of the tubes outside the outer layer to form the distal end tubes.Type: GrantFiled: June 1, 2000Date of Patent: April 13, 2004Assignee: Medical Components, Inc.Inventors: Timothy Schweikert, Anthony J. Madison, Donald A. Schon
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Publication number: 20040059314Abstract: A multilumen catheter assembly is provided, which includes a unitary portion and at least two distal end tubes extending distally from the unitary portion. The unitary portion includes an exterior having a generally round or oval shape in cross section and includes at least two distal end tubes of generally circular (or other) cross sectional shape extending longitudinally therethrough. The catheter assembly may be made by extruding a unitary tube having internal longitudinally extending lumens (of circular or other shape), then splitting the tube on its distal end portion to form distal end tubes. The tubes are then ground and polished, the finished tubes retaining in combination the generally oval cross sectional shape of the unitary extrusion, or the finished tubes can each be finished to a circular, or other, cross sectional shape, or the finished tubes could include a combination of cross sectional shapes over its longitudinal length.Type: ApplicationFiled: September 24, 2003Publication date: March 25, 2004Inventors: Donald A. Schon, Anthony J. Madison, Timothy M. Schweikert
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Publication number: 20040054321Abstract: A multilumen catheter assembly is provided, which includes a unitary portion and at least two distal end tubes extending distally from the unitary portion. The unitary portion includes an exterior having a generally round or oval shape in cross section and includes at least two distal end tubes of generally circular (or other) cross sectional shape extending longitudinally therethrough. The catheter assembly may be made by extruding a unitary tube having internal longitudinally extending lumens (of circular or other shape), then splitting the tube on its distal end portion to form distal end tubes. The tubes are then ground and polished, the finished tubes retaining in combination the generally oval cross sectional shape of the unitary extrusion, or the finished tubes can each be finished to a circular, or other, cross sectional shape; or the finished tubes could include a combination of cross sectional shapes over its longitudinal length.Type: ApplicationFiled: September 10, 2003Publication date: March 18, 2004Inventors: Donald A. Schon, Anthony J. Madison, Timothy M. Schweikert
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Patent number: 6695832Abstract: A multilumen catheter assembly is provided, which includes a unitary portion and at least two distal end tubes extending distally from the unitary portion. The unitary portion includes an exterior having a generally round or oval shape in cross section and includes at least two distal end tubes of generally circular (or other) cross sectional shape extending longitudinally therethrough. The catheter assembly may be made by extruding a unitary tube having internal longitudinally extending lumens (of circular or other shape), then splitting the tube on its distal end portion to form distal end tubes. The tubes are then ground and polished, the finished tubes retaining in combination the generally oval cross sectional shape of the unitary extrusion, or the finished tubes can each be finished to a circular, or other, cross sectional shape, or the finished tubes could include a combination of cross sectional shapes over its longitudinal length.Type: GrantFiled: November 21, 2002Date of Patent: February 24, 2004Assignees: TwinCath, LLC, Medical Components, Inc.Inventors: Donald A. Schon, Anthony J. Madison, Timothy Schweikert
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Publication number: 20030153898Abstract: A multilumen catheter assembly is provided, which includes a unitary portion and at least two distal end tubes extending distally from the unitary portion. The unitary portion includes an exterior having a generally round or oval shape in cross section and includes at least two distal end tubes of generally circular (or other) cross sectional shape extending longitudinally therethrough. The catheter assembly may be made by extruding a unitary tube having internal longitudinally extending lumens (of circular or other shape), then splitting the tube on its distal end portion to form distal end tubes. The tubes are then ground and polished, the finished tubes retaining in combination the generally oval cross sectional shape of the unitary extrusion, or the finished tubes can each be finished to a circular, or other, cross sectional shape, or the finished tubes could include a combination of cross sectional shapes over its longitudinal length.Type: ApplicationFiled: November 21, 2002Publication date: August 14, 2003Inventors: Donald A. Schon, Anthony J. Madison, Timothy M. Schweikert
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Patent number: 6190349Abstract: A multiple lumen catheter assembly and methods for inserting the same are provided. The assembly includes a splittable membrane joining a first catheter and a second catheter for allowing the catheters to be at least partially longitudinally split from each other. Each catheter has at least one lumen extending longitudinally through the catheter. One method for inserting the assembly includes making an incision near the area to be catheterized, at least partially splitting the distal end regions of the catheters from each other by splitting apart the splittable membrane, and inserting the distal end regions of the catheters in a juxtaposed relation through the incision and into the area to be catheterized. In another method, the catheters are first tunnelled subcutaneously by pulling the distal end regions of the catheters in the assembly through a tunnel and outwardly from the tunnel near the area to be catheterized, leaving proximal end regions at least partially within the tunnel.Type: GrantFiled: August 2, 1999Date of Patent: February 20, 2001Assignees: Hemocleanse, Inc., Medical Components, Inc.Inventors: Stephen R. Ash, Anthony J. Madison, Timothy M. Schweikert
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Patent number: 5947953Abstract: A multiple lumen catheter assembly and methods for inserting the same are provided. The assembly includes a splittable membrane joining a first catheter and a second catheter for allowing the catheters to be at least partially longitudinally split from each other. Each catheter has at least one lumen extending longitudinally through the catheter. One method for inserting the assembly includes making an incision near the area to be catheterized, at least partially splitting the distal end regions of the catheters from each other by splitting apart the splittable membrane, and inserting the distal end regions of the catheters in a juxtaposed relation through the incision and into the area to be catheterized. In another method, the catheters are first tunnelled subcutaneously by pulling the distal end regions of the catheters in the assembly through a tunnel and outwardly from the tunnel near the area to be catheterized, leaving proximal end regions at least partially within the tunnel.Type: GrantFiled: August 6, 1997Date of Patent: September 7, 1999Assignees: HemoCleanse, Inc., Medical Components, Inc.Inventors: Stephen R. Ash, Anthony J. Madison, Timothy M. Schweikert
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Patent number: 5944732Abstract: A subcutaneous tunnelling device, a dilator and a method of forming a subcutaneous tunnel are provided. The device includes a trocar having a front end with a point configured for piercing skin, and a dilator which has a front end removably attached to the rear end of the trocar. The dilator is for dilating a section of a subcutaneous tunnel and includes a dilating section having a maximum diameter sized for dilating an interior surface of a subcutaneous tunnel for seating a catheter stabilizing cuff in the subcutaneous tunnel. The method of forming a subcutaneous tunnel includes the steps of inserting a trocar through a first location on a cutaneous surface and moving the trocar through subcutaneous tissue to form a subcutaneous tunnel. The trocar is at least partially removed and a front end of a dilator is attached to the trocar. A section of the tunnel is dilated by moving the dilator partially through the tunnel until the front end of the dilator reaches a first subcutaneous location in the tunnel.Type: GrantFiled: August 27, 1997Date of Patent: August 31, 1999Assignee: Medical Components, Inc.Inventors: J. Daniel Raulerson, Anthony J. Madison, Timothy M. Schweikert
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Patent number: 5718692Abstract: A self-retaining catheter assembly is provided which includes a first and second catheter and a retaining sleeve. The first and second catheters each have an exterior surface and an interior surface defining a lumen which extends longitudinally through the catheter. The first catheter has a proximal portion which is for placement within a first subcutaneous area, and the second catheter has a proximal portion which is for placement within a second subcutaneous area. The first and second catheters also each have distal portions for placement within an area to be catheterized. The retaining sleeve is positioned around a portion of the exterior surfaces of the catheters which is located proximal to the distal portions of the catheters.Type: GrantFiled: June 6, 1995Date of Patent: February 17, 1998Assignees: Twineath, L.L.C., Medical Component, Inc.Inventors: Donald Schon, Anthony J. Madison
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Patent number: 5624413Abstract: A method is provided for inserting a multiple catheter assembly into an area of a body to be catheterized through a single incision. Two independent catheters which are independently movable with respect to each other, or unattached to each other, along their entire length are inserted into the single incision. In use, the first catheter withdraws fluid from the area and the second catheter delivers fluid to the area. As part of the insertion method, the longitudinal distance between proximal portions of the two catheters are adjusted to provide a predetermined longitudinal distance between distal portions of the two catheters within the area.Type: GrantFiled: February 23, 1996Date of Patent: April 29, 1997Assignee: Medical Components, Inc.Inventors: David F. Markel, Anthony J. Madison
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Patent number: 5053004Abstract: A double-lumen catheter is made of two generally coaxial tubes. The tubes are joined, at their distal ends, by a sleeve inserted between the tubes, the sleeve being bonded to both tubes. The inner and outer tubes are connected, respectively, at their proximal ends, to first and second hubs. The hubs are bonded together. The distal ends of the tubes may be formed into a tapered tip, preferably having a rounded edge. The proximal ends of the tubes can be connected to external fluid devices. The invention also includes a method of making the catheter. According to this method, inner and outer tubes are separately formed, and the proximal end of each tube is connected to a hub. Then, the inner tube is threaded into the outer tube, until the distal ends of the tubes are near each other. A sleeve is inserted between the tubes, at the distal end, and the sleeve is then bonded to both tubes. The hubs are also bonded together. Thus, the tubes are firmly joined to each other, but only at their distal and proximal ends.Type: GrantFiled: August 24, 1990Date of Patent: October 1, 1991Assignee: Medical Components, Inc.Inventors: David F. Markel, Anthony J. Madison, David E. Roberts, William R. Harkins
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Patent number: RE40913Abstract: A multilumen catheter assembly and methods for making and inserting the same are provided. The catheter assembly includes a unitary catheter and at least two distal end tubes which extend distally from the unitary catheter. The at least two lumens in the unitary catheter are in fluid communication with passageways through the distal end tubes. The catheter assembly may be made by extruding a unitary catheter tube having internal longitudinally extending lumens, then splitting the tube on its distal end portion to form distal end tubes. The tubes are then ground and polished to form a smooth surface on the exterior of the tubes. The catheter assembly may also be made by forming an outer layer on at least two longitudinally extending catheters while leaving two distally extending portions of the tubes outside the outer layer to form the distal end tubes.Type: GrantFiled: November 24, 2004Date of Patent: September 8, 2009Assignee: Medical Components, Inc.Inventors: Timothy M. Schweikert, Anthony J. Madison, Donald A. Schon