Patents by Inventor LeRoy E. Groshong
LeRoy E. Groshong 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: 5178625Abstract: A catheter atherotome and method for its use for performing partial atherectomy in an artery and thereby enlarging the lumen effectively available for blood flow through the artery. An expansible cutter head at the distal end of a catheter includes several elongate flexible members mounted in a parallel array and spaced angularly apart from one another about the associated ends of two concentric members of the catheter in such a way that longitudinal and rotary relative movement of the members of the catheter selectively either bows the flexible members arcuately outwardly into a cutting position or draws them into alignment parallel with the catheter. A sharpened edge of a blade carried on at least one flexible member extends circumferentially and is directed toward the catheter's proximal end when the flexible members are bowed.Type: GrantFiled: December 19, 1991Date of Patent: January 12, 1993Assignee: EVI CorporationInventor: LeRoy E. Groshong
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Patent number: 5160342Abstract: A filter useful in tubular organs of the human body, intended primarily for endovascular use during surgical procedures for removal of plaque and other treatment of stenoses in arteries, in order to entrap particles of plaque or other materials freed from the interior wall of an artery while permitting continued flow of blood through the artery during the procedure of treating the stenosis. Several filter elements are fastened in apart-spaced relationship with one another along a flexible elongate member and are large enough to require the entire flow of blood through the artery to pass through the filter elements. An open-mouthed tubular stocking of porous filter material encloses the filter elements and supports the periphery of each filter element. Successive filter elements, progressing in the direction of blood flow, pass only progressively smaller particles.Type: GrantFiled: December 30, 1991Date of Patent: November 3, 1992Assignee: Evi Corp.Inventors: Vincent A. Reger, Thomas L. Kelly, LeRoy E. Groshong
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Patent number: 5108419Abstract: A filter useful in tubular organs of the human body, intended primarily for endovascular use during surgical procedures for removal of plaque and other treatment of stenoses in arteries, in order to entrap particles of plaque or other materials freed from the interior wall of an artery while permitting continued flow of blood through the artery during the procedure of treating the stenosis. Several filter elements are fastened in apart-spaced relationship with one another along a flexible elongate member and are large enough to require the entire flow of blood through the artery to pass through the filter elements. An open-mouthed tubular stocking of porous filter material encloses the filter elements and supports the periphery of each filter element. Successive filter elements, progressing in the direction of blood flow, pass only progressively smaller particles.Type: GrantFiled: August 16, 1990Date of Patent: April 28, 1992Assignee: EVI CorporationInventors: Vincent A. Reger, Thomas L. Kelly, LeRoy E. Groshong
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Patent number: 5074871Abstract: A catheter atherotome and method for its use for performing partial atherectomy in an artery and thereby enlarging the lumen effectively available for blood flow through the artery. An expansible cutter head at the distal end of a catheter includes several elongate flexible members mounted in a parallel array and spaced angularly apart from one another about the associated ends of two concentric members of the catheter in such a way that longitudinal and rotary relative movement of the members of the catheter selectively either bows the flexible members arcuately outwardly into a cutting position or draws them into alignment parallel with the catheter. A sharpened edge of a blade carried on at least one flexible member extends circumferentially and is directed toward the catheter's proximal end when the flexible members are bowed.Type: GrantFiled: December 7, 1989Date of Patent: December 24, 1991Assignee: EVI CorporationInventor: LeRoy E. Groshong
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Patent number: 4898579Abstract: An infusion pump for administering fluid from a fluid source to a patient comprises a base member having an electric motor for driving a fluid pump housed within a cassette detachably mountable on the base and connectable to the motor. The cassette houses a reciprocative piston and cylinder assembly which both pumps fluid to the patient while simultaneously drawing fluid from the fluid source so as to maintain a continuous flow rate of fluid to the patient. The cassette also houses deformably closable pairs of tubes connecting each of the pump's two fluid chambers to the cassette inlet and outlet respectively to provide the necessary valving to produce continuous flow in cooperation with the reciprocative piston and cylinder assembly.Type: GrantFiled: June 3, 1988Date of Patent: February 6, 1990Assignee: Pump Controller CorporationInventors: Leroy E. Groshong, Judson C. Groshong, R. James Brawn, deceased
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Patent number: 4838860Abstract: An infusion pump for administering fluid from a fluid source to a patient comprises a base member having an electric motor for driving a fluid pump housed within a cassette detachably mountable on the base and connectable to the motor. The cassette houses a reciprocative piston and cylinder assembly which both pumps fluid to the patient while simultaneously drawing fluid from the fluid source so as to maintain a continuous flow rate of fluid to the patient. The cassette also houses deformably closable pairs of tubes connecting each of the pump's two fluid chambers to the cassette inlet and outlet respectively to provide the necessary valving to produce continuous flow in cooperation with the reciprocative piston and cylinder assembly.Type: GrantFiled: June 26, 1987Date of Patent: June 13, 1989Assignee: Pump Controller CorporationInventors: Leroy E. Groshong, Judson C. Groshong, R. James Brawn, deceased
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Patent number: 4772266Abstract: Dilator/sheath assemblies for unstressed placement of catheter tubes into a body cavity of medical patients, which insure a stable axial relationship between concentrically superimposed sheath and dilator so that use is very facile for the medical attendent and insures a predetermined two-step gentle enlargement of a puncture site to accommodate unstressed placement of a catheter tube into a vein or artery through the puncture site and with minimal trauma to the patient.Type: GrantFiled: May 4, 1987Date of Patent: September 20, 1988Assignee: Catheter Technology Corp.Inventor: LeRoy E. Groshong
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Patent number: 4701166Abstract: Catheter of soft, flexible material is formed with closed end. Fluid opening formed by single slit through tubing wall of such length that valve will open only upon application of predetermined pressure differentials. Removable stiffener member is positioned in catheter, abutting closed end to push catheter into body vessel when inserting.Type: GrantFiled: October 2, 1986Date of Patent: October 20, 1987Assignee: Catheter Technology Corp.Inventors: LeRoy E. Groshong, Ronald J. Brawn
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Patent number: 4671796Abstract: Catheter of soft, flexible material is formed with closed end. Fluid opening formed by single slit through tubing wall of such length that valve will open only upon application of predetermined pressure differentials. Removable stiffener member is positioned in catheter, abutting closed end to push catheter into body vessel when inserting.Type: GrantFiled: October 25, 1985Date of Patent: June 9, 1987Assignee: Catheter Technology Corp.Inventors: LeRoy E. Groshong, Ronald J. Brawn
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Patent number: 4559046Abstract: Apparatus for intravenous therapy including hyperalimentation comprises a flexible closed-end catheter having a valve adjacent its proximal end. It is inserted through the skin of a patient and into a vein having a suitably large flow of blood therethrough. A removable internal stiffening member comprising a doubled, twisted flexible wire abuts the proximal closed catheter end. A distal female fluid flow fitting is fixed to the distal end of the stiffening member and is releasably attached to the distal catheter end. The distal end of the catheter has a male coupler allowing releasable connection of the fluid flow fitting of the internal stiffener to a source of intravenous solution which flows by gravity or pump means through the catheter and into the vein.Type: GrantFiled: July 28, 1983Date of Patent: December 17, 1985Assignee: Catheter Technology CorporationInventors: LeRoy E. Groshong, Ronald J. Brawn
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Patent number: 4549879Abstract: Catheter of soft, flexible material is formed with closed end. Fluid opening formed by single slit through tubing wall of such length that valve will open only upon application of predetermined pressure differentials. Removable stiffener member is positioned in catheter, abutting closed end to push catheter into body vessel when inserting.Type: GrantFiled: May 3, 1983Date of Patent: October 29, 1985Assignee: Catheter Technology CorporationInventors: LeRoy E. Groshong, Ronald J. Brawn
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Patent number: 4529399Abstract: The skin and a subjacent body vessel is pierced with a needle mounted on a fluid-fillable chamber at the opposite end of which is a plunger movable into the chamber. In one embodiment, disposed within the needle and chamber is a closed-ended flexible catheter. A flexible stylet is disposed in the catheter. The catheter is drawn through the needle and into the body vessel by pushing into the chamber the plunger which engages the distal portion of the stylet. The closed-ended pliable catheter is drawn into place in the body vessel by the pushing stylet while fluid is simultaneously infused into the body vessel to dilate it and thereby ease the advancement of the catheter with minimal damage to the vessel wall.The chamber and needle are removable from the catheter, leaving it in place in the body for the infusion of fluid.In another embodiment a stiffer, open-ended catheter is used and plunger pushes directly against the catheter to push it into the body vessel.Type: GrantFiled: May 3, 1983Date of Patent: July 16, 1985Assignee: Catheter Technology CorporationInventors: LeRoy E. Groshong, Ronald J. Brawn
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Patent number: 4431426Abstract: Methods and apparatus for short term and long term intravenous therapy including hyperalimentation are disclosed. The proximal end of a flexible catheter having a one way valve adjacent its proximal end is inserted through the skin of a patient and into a vein having a suitably large flow of blood therethrough. The distal end of the catheter has a threaded male coupler for connecting it to a flow reducing adaptor and thence to a source of intravenous solution. The solution flows by gravity through the catheter and into the vein. A passer which can be connected to the male coupler is provided for subcutaneously threading the catheter during long term catheter placement.Type: GrantFiled: October 3, 1980Date of Patent: February 14, 1984Inventors: Leroy E. Groshong, Ronald J. Brawn
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Patent number: 4327722Abstract: Methods and apparatus for short term and long term intravenous therapy including hyperalimentation are disclosed. The proximal end of a flexible catheter having a one way valve adjacent its proximal end is inserted through the skin of a patient and into a vein having a suitably large flow of blood therethrough. The distal end of the catheter has a threaded male coupler for connecting it to a flow reducing adaptor and then to a source of intravenous solution. The solution flows by gravity through the catheter and into the vein. A passer which can be connected to the male coupler is provided for subcutaneously threading the catheter during long term catheter placement.Type: GrantFiled: August 20, 1979Date of Patent: May 4, 1982Inventors: LeRoy E. Groshong, Ronald J. Brawn