Patents by Inventor Karla Weaver
Karla Weaver 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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Publication number: 20120271247Abstract: A valve apparatus for medical applications, comprises a flexible member extending across a lumen through which a flow of materials is to be controlled. The flexible member includes a plurality of movable elements formed on opposite sides of a slit extending through the flexible member. The moveable members are biased so that when a pressure less than a predetermined threshold value is applied to the flexible member, the moveable elements are maintained in a closed position in which no flow is permitted past the flexible member and, when a pressure at least as great as the threshold value is applied to the flexible member, the moveable elements are moved to an open position separated from one another along the slit permitting flow through the lumen.Type: ApplicationFiled: April 29, 2011Publication date: October 25, 2012Applicant: Navilyst Medical, Inc.Inventors: Karla Weaver, Jim Culhane
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Publication number: 20120226243Abstract: A pressure activated valve comprises a valve housing defining a lumen for receiving bodily fluids therein and a flexible membrane disposed in the valve housing. The flexible membrane includes a slit extending therethrough so that the flexible membrane may be moved between an open and a closed configuration based on fluid pressure within the lumen. A nonthrombogenic coating may be formed on fluid contacting surfaces of the flexible membrane.Type: ApplicationFiled: April 30, 2012Publication date: September 6, 2012Applicant: Navilyst Medical, Inc.Inventors: Karla Weaver, Paul DiCarlo
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Patent number: 8187234Abstract: A pressure activated valve comprises a valve housing defining a lumen for receiving bodily fluids therein and a flexible membrane disposed in the valve housing. The flexible membrane includes a slit extending therethrough so that the flexible membrane may be moved between an open and a closed configuration based on fluid pressure within the lumen. A nonthrombogenic coating may be formed on fluid contacting surfaces of the flexible membrane.Type: GrantFiled: January 29, 2004Date of Patent: May 29, 2012Assignee: Navilyst Medical, Inc.Inventors: Karla Weaver, Paul DiCarlo
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Publication number: 20110313368Abstract: A pressure actuated valve for controlling the flow of fluid through a medical device, the valve comprises a housing including a lumen extending therethrough and a flow control membrane extending across the lumen to control the flow of fluid through the lumen. The membrane includes a plurality of slits extending therethrough so that, when the membrane is acted upon by a pressure of at least a threshold magnitude, the slits open to permit flow through the lumen and, when not acted upon by a pressure of at least the predetermined magnitude, the slits are maintained closed by a biasing force applied thereto by the membrane to prevent flow through the lumen. Each of the slits extends between end portions thereof along a curve wherein a distance between a first end portion of a first one of the slits and a first end portion of a second one of the slits is a minimum distance between the first and second slits.Type: ApplicationFiled: August 31, 2011Publication date: December 22, 2011Applicant: Navilyst Medical, Inc.Inventors: Karla Weaver, Paul DiCarlo
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Patent number: 8034035Abstract: A pressure actuated valve for controlling the flow of fluid through a medical device, the valve comprises a housing including a lumen extending therethrough and a flow control membrane extending across the lumen to control the flow of fluid through the lumen. The membrane includes a plurality of slits extending therethrough so that, when the membrane is acted upon by a pressure of at least a threshold magnitude, the slits open to permit flow through the lumen and, when not acted upon by a pressure of at least the predetermined magnitude, the slits are maintained closed by a biasing force applied thereto by the membrane to prevent flow through the lumen. Each of the slits extends between end portions thereof along a curve wherein a distance between a first end portion of a first one of the slits and a first end portion of a second one of the slits is a minimum distance between the first and second slits.Type: GrantFiled: January 29, 2004Date of Patent: October 11, 2011Assignee: Navilyst Medical, Inc.Inventors: Karla Weaver, Paul DiCarlo
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Patent number: 7951121Abstract: A valve apparatus for medical applications, comprises a flexible member extending across a lumen through which a flow of materials is to be controlled. The flexible member includes a plurality of movable elements formed on opposite sides of a slit extending through the flexible member. The moveable members are biased so that when a pressure less than a predetermined threshold value is applied to the flexible member, the moveable elements are maintained in a closed position in which no flow is permitted past the flexible member and, when a pressure at least as great as the threshold value is applied to the flexible member, the moveable elements are moved to an open position separated from one another along the slit permitting flow through the lumen.Type: GrantFiled: July 30, 2003Date of Patent: May 31, 2011Assignee: Navilyst Medical, Inc.Inventors: Karla Weaver, Jim Culhane
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Publication number: 20090177187Abstract: A pressure actuated valve comprises a first membrane having a slit extending through the membrane at a nonzero draft angle relative to a perpendicular to a surface of the membrane, material of the membrane biasing the slit closed so that the slit remains closed when a fluid pressure applied to the membrane is below a threshold level and, when the fluid pressure is at least the threshold level, edges of the slit separate from one another to permit fluid flow through the membrane.Type: ApplicationFiled: September 10, 2008Publication date: July 9, 2009Inventors: Karla Weaver Quigley, Steven Grantz, Richard Pok, Anthony Hien, Kimberly Un
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Publication number: 20090043261Abstract: A valve for controlling material flow through a catheter, comprises a first flexible member including a first moveable element, wherein, when the first moveable element is in the open position, material may flow past the first flexible member through a first lumen of the catheter and, when the first moveable element is in the closed position, flow through the first lumen is prevented and a first biasing member coupled to the first flexible member for biasing the first moveable member toward the closed position.Type: ApplicationFiled: October 14, 2008Publication date: February 12, 2009Inventors: Karla Weaver, Jim Culhane
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Patent number: 7435236Abstract: A valve for controlling material flow through a catheter, comprises a first flexible member including a first moveable element, wherein, when the first moveable element is in the open position, material may flow past the first flexible member through a first lumen of the catheter and, when the first moveable element is in the closed position, flow through the first lumen is prevented and a first biasing member coupled to the first flexible member for biasing the first moveable member toward the closed position.Type: GrantFiled: June 27, 2003Date of Patent: October 14, 2008Assignee: Navilyst Medical, Inc.Inventors: Karla Weaver, Jim Culhane
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Publication number: 20050171489Abstract: A pressure activated valve comprises a valve housing defining a lumen for receiving bodily fluids therein and a flexible membrane disposed in the valve housing. The flexible membrane includes a slit extending therethrough so that the flexible membrane may be moved between an open and a closed configuration based on fluid pressure within the lumen. A nonthrombogenic coating may be formed on fluid contacting surfaces of the flexible membrane.Type: ApplicationFiled: January 29, 2004Publication date: August 4, 2005Inventors: Karla Weaver, Paul DiCarlo
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Publication number: 20050171490Abstract: A pressure activated valve for medical applications comprises a housing having a lumen extending therethrough from a proximal end to a distal end thereof and a flow control membrane extending across the lumen to control flow therethrough, the flow control membrane including a mounting portion at which the flow control membrane is coupled to the housing and a lumen occluding portion having a slit extending therethrough so that, when the lumen occluding portion is subjected to a pressure of at least a predetermined threshold level, the lumen occluding portion moves from a closed configuration in which flow through the lumen is prevented to an open configuration in which flow is permitted and wherein a thickness of the mounting portion is greater than a thickness of the lumen occluding portion.Type: ApplicationFiled: January 29, 2004Publication date: August 4, 2005Inventors: Karla Weaver, Paul DiCarlo
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Publication number: 20050171510Abstract: A pressure actuated valve, comprises a flow chamber having an inlet and an outlet and a resilient membrane extending across the flow chamber to selectively impede passage of a fluid between the inlet and the outlet. The membrane includes at least one slit formed therein so that, when a fluid pressure to which the membrane is subjected is at least a predetermined threshold level, edges of the at least one slit separate to permit fluid flow therethrough. The at least one slit has a first curvature in a surface plane of the membrane and a second curvature along a thickness of the membrane to impart a rotational velocity component to a flow of fluid therethrough relative to a centerline of the flow chamber.Type: ApplicationFiled: January 29, 2004Publication date: August 4, 2005Inventors: Paul DiCarlo, Karla Weaver
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Publication number: 20050171488Abstract: A pressure actuated valve for controlling the flow of fluid through a medical device, the valve comprises a housing including a lumen extending therethrough and a flow control membrane extending across the lumen to control the flow of fluid through the lumen. The membrane includes a plurality of slits extending therethrough so that, when the membrane is acted upon by a pressure of at least a threshold magnitude, the slits open to permit flow through the lumen and, when not acted upon by a pressure of at least the predetermined magnitude, the slits are maintained closed by a biasing force applied thereto by the membrane to prevent flow through the lumen. Each of the slits extends between end portions thereof along a curve wherein a distance between a first end portion of a first one of the slits and a first end portion of a second one of the slits is a minimum distance between the first and second slits.Type: ApplicationFiled: January 29, 2004Publication date: August 4, 2005Inventors: Karla Weaver, Paul DiCarlo
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Publication number: 20050027261Abstract: A valve apparatus for medical applications, comprises a flexible member extending across a lumen through which a flow of materials is to be controlled. The flexible member includes a plurality of movable elements formed on opposite sides of a slit extending through the flexible member. The moveable members are biased so that when a pressure less than a predetermined threshold value is applied to the flexible member, the moveable elements are maintained in a closed position in which no flow is permitted past the flexible member and, when a pressure at least as great as the threshold value is applied to the flexible member, the moveable elements are moved to an open position separated from one another along the slit permitting flow through the lumen.Type: ApplicationFiled: July 30, 2003Publication date: February 3, 2005Inventors: Karla Weaver, Jim Culhane
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Publication number: 20040267185Abstract: A valve for controlling material flow through a catheter, comprises a first flexible member including a first moveable element, wherein, when the first moveable element is in the open position, material may flow past the first flexible member through a first lumen of the catheter and, when the first moveable element is in the closed position, flow through the first lumen is prevented and a first biasing member coupled to the first flexible member for biasing the first moveable member toward the closed position.Type: ApplicationFiled: June 27, 2003Publication date: December 30, 2004Inventors: Karla Weaver, Jim Culhane
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Publication number: 20040186510Abstract: Intravascular filter devices adapted for temporary or permanent insertion in a blood vessel are disclosed. An intravascular filter device may comprise a first set of filter legs configured to attach to a vessel wall, and a second set of shorter filter legs configured to attach at a different location to the vessel wall. Both sets of filter legs may include a proximal filtering portion and a distal centering portion, and can be configured to radially expand in an outward direction and with equal force when placed in the vessel. Moreover, the filter device may employ one or more features to ensure uniform clot capturability across the vessel.Type: ApplicationFiled: March 18, 2003Publication date: September 23, 2004Applicant: SCIMED LIFE SYSTEMS, INC.Inventor: Karla Weaver
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Publication number: 20040158273Abstract: Intravascular filtering devices for placement within a blood vessel are disclosed. An intravascular filter in accordance with the present invention may include a plurality of elongated filter legs biased to radially expand from a collapsed position to a conical-shaped position when deployed in a blood vessel. Each of the filter legs may include a hook region configured to engage the vessel wall. The filter legs may vary in length and/or cross-sectional diameter. In certain embodiments, the dimensions and/or orientation of the hook regions can be configured to allow the filter device to be collapsed into a relatively small introducer catheter or sheath.Type: ApplicationFiled: February 7, 2003Publication date: August 12, 2004Applicant: SCIMED LIFE SYSTEMS, INC.Inventors: Karla Weaver, Sally Thornton