Patents by Inventor Finn Gramnas
Finn Gramnas 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: 8784501Abstract: A limb prosthesis which via coupling means is adapted to be connected to an implant in the form of an osseointegrated shaft projecting from an amputated stump. The coupling means comprises a flexible joint and the prosthesis further comprises at least one force transmitting device secured to and extending from a prosthetic member connected to the coupling means up to a position on the amputated stump or body portion to which the stump connects. The force transmitting device is adapted to be secured to the stump or other body portion in such a way that it relieves the implant from at least part of the bending and/or rotational forces exerted to the prosthetic member.Type: GrantFiled: December 21, 2007Date of Patent: July 22, 2014Assignee: Ossur HFInventor: Finn Gramnas
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Patent number: 8721736Abstract: A damping device (1) for a prosthesis, comprising a first member (2) for connection to a first component, a second member (3) for connection to another component, and a means (4) for coupling together the first member and the second member and for relative displacement of the first member and the second member. A damping element (5) is arranged to counteract a relative displacement between the first member (2) and the second member (3) when loading the damping device (1). The coupling means 4 comprises at least two linkage arms (6, 7), both being pivotally arranged in relation to the first member (2) and the second member (3).Type: GrantFiled: January 13, 2006Date of Patent: May 13, 2014Assignee: Ossur HFInventor: Finn Gramnäs
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Patent number: 7544214Abstract: An artificial multi-axis knee joint comprising an upper leg portion and a lower leg portion pivotally connected to each other by a front link for pivoting the front link and the upper leg portion relative to each other around a first geometrical pivot axis, and for pivoting the front link and the lower leg portion relative to each other around a second geometrical pivot axis. A rear link is pivotally connected to the upper leg portion for pivoting the rear link and the upper leg portion relative to each other around a third geometrical pivot axis, and pivotally connected at the other end thereof to the lower leg portion for pivoting the rear link and the lower leg portion relative to each other around a fourth geometrical pivot axis. The knee joint further comprises a further means which is integrated in the front link and the rear link.Type: GrantFiled: October 14, 2004Date of Patent: June 9, 2009Assignee: Ossur HFInventor: Finn Gramnäs
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Publication number: 20080161938Abstract: A limb prosthesis which via coupling means is adapted to be connected to an implant in the form of an osseointegrated shaft projecting from an amputated stump. The coupling means comprises a flexible joint and the prosthesis further comprises at least one force transmitting device secured to and extending from a prosthetic member connected to the coupling means up to a position on the amputated stump or body portion to which the stump connects. The force transmitting device is adapted to be secured to the stump or other body portion in such a way that it relieves the implant from at least part of the bending and/or rotational forces exerted to the prosthetic member.Type: ApplicationFiled: December 21, 2007Publication date: July 3, 2008Inventor: Finn Gramnas
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Publication number: 20080140222Abstract: A damping device (1) for a prosthesis, comprising a first member (2) for connection to a first component, a second member (3) for connection to another component, and a means (4) for coupling together the first member and the second member and for relative displacement of the first member and the second member. A damping element (5) is arranged to counteract a relative displacement between the first member (2) and the second member (3) when loading the damping device (1). The coupling means 4 comprises at least two linkage arms (6, 7), both being pivotally arranged in relation to the first member (2) and the second member (3).Type: ApplicationFiled: January 13, 2006Publication date: June 12, 2008Inventor: Finn Gramnas
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Publication number: 20070208430Abstract: An artificial multi-axis knee joint comprising an upper leg portion (1) and a lower leg portion (2), the upper leg portion and the lower leg portion being pivotally connected to each other by means of a front link (3), which front link (3) at one end thereof is pivotally connected to the upper leg portion (1) for pivoting the front link and the upper leg portion relative to each other around a first geometrical pivot axis (5) and at the other end thereof is pivotally connected to the lower leg portion (2) for pivoting the front link and the lower leg portion relative to each other around a second geometrical pivot axis (6), and by means of at least one rear link (4), which rear link (4) at one end thereof is pivotally connected to the upper leg portion (1) for pivoting said at least one rear link and the upper leg portion relative to each other around a third geometrical pivot axis (7) and at the other end thereof is pivotally connected to the lower leg portion (2) for pivoting said at least one rear link andType: ApplicationFiled: October 14, 2004Publication date: September 6, 2007Inventor: Finn Gramnäs
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Patent number: 7052519Abstract: The present invention relates to an arrangement for a leg prosthesis (10) provided with a foot (12), which is connected to the leg prosthesis via an articulated axle (11), whereby first means (13, 14, 16–18, 30–33, 38) are arranged to provide a limited rotation of the foot relative the leg prosthesis from an initial position, in which position the leg prosthesis and the foot have a fixed angle relative each other, and second means (16–26) are arranged to provide a step-less adjustment of the fixed angle between the leg prosthesis and the foot in the initial position. According to the invention the first means (13, 14, 16–18, 30–33, 38) comprise a resilient element (14), which first end thereof is connected to the foot (12) via an elongated element (13) and which second end is connected to the leg prosthesis so that the leg prosthesis can be rotated relative the foot against the effect of the spring force of the resilient element.Type: GrantFiled: June 9, 2000Date of Patent: May 30, 2006Assignee: Gramtec Innovation ABInventor: Finn Gramnäs
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Publication number: 20050137717Abstract: A prosthetic foot comprises a foot member, a rocker member connected in cantilever fashion to the foot member, and an ankle module movably connected to the rocker member about an axis, wherein an anterior section of the rocker member is configured to roll-up onto the foot member an amount corresponding to the load applied on the foot, and wherein the foot member is configured to facilitate the initial roll-up of the rocker member.Type: ApplicationFiled: December 18, 2003Publication date: June 23, 2005Inventors: Finn Gramnas, Heidrun Ragnarsdottir, Sigurdur Asgeirsson
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Patent number: 6855170Abstract: A device in a leg prosthesis which via a pivot axle is connected to the leg prosthesis, wherein first means are arranged to permit a limited rotation of the foot with respect to the leg prosthesis from an initial position, in which the leg prosthesis and the foot have a certain angle with respect to each other and second means are arranged to permit a stepless adjustment of the angle between the prosthesis and the foot in the initial position.Type: GrantFiled: August 22, 2001Date of Patent: February 15, 2005Assignee: Gramtec Innovation ABInventor: Finn Gramnäs
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Patent number: 6808540Abstract: A device of the kind that comprises a polycentric link mechanism with at least four elements, namely one front and one back base element (10, 11) and one upper and one lower connecting element (12, 13). The upper connecting element (12) forms a unit fixedly attached to a thighbone part (21) of prosthesis and the lower connecting element (13) forms a unit fixedly attached to the shank part (22) of prothesis. The back base element (11) is pivotably connected at its upper end to the upper connecting element (12) and pivotably connected at its lower end to the lower connecting element (13) via a jointed attachment element (23), the movement of which is limited by a resilient stop device (29), whereby also the forward movement of the back base element (11) is limited when the knee joint is in a substantially straight position.Type: GrantFiled: May 20, 2002Date of Patent: October 26, 2004Assignee: Gramtec Innovation ABInventor: Finn Gramnäs
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Publication number: 20040044417Abstract: A device in a leg prosthesis which via a pivot axle is connected to the leg prosthesis, wherein first means are arranged to permit a limited rotation of the foot with respect to the leg prosthesis from an initial position, in which the leg prosthesis and the foot have a certain angle with respect to each other and second means are arranged to permit a stepless adjustment of the angle beetween the prosthesis and the foot in the initial position.Type: ApplicationFiled: May 13, 2003Publication date: March 4, 2004Inventor: Finn Gramnas
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Patent number: 6626951Abstract: The present invention provides a locking device intended as a fastening element for prostheses, of the kind in which the prosthesis is attached to a cylindrical member. The locking device includes a housing with a through opening for receiving the cylindrical member and a locking mechanism arranged therein for locking to the cylindrical member in one axial direction thereof. In the housing along the through opening of the housing opposite the locking mechanism there is further arranged a spring-loaded gripping washer with a through opening which is somewhat larger than the diameter of the cylindrical member and which by an axle having a lever arm is brought to an inclined position and grips the cylindrical member and pulls the cylindrical member further into the housing.Type: GrantFiled: December 4, 2001Date of Patent: September 30, 2003Inventor: Finn Gramnäs
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Patent number: 6596029Abstract: The present invention relates to a foot prosthesis comprising a front foot portion (1), a rear foot portion (2) and an intermediate foot portion (3) formed by a number of rods (8) of resilient material, which rods extend in the longitudinal direction of the foot prosthesis. According to the invention the rods (8) are rotatably connected with at least one of the front and rear foot portions (1,2).Type: GrantFiled: January 4, 2002Date of Patent: July 22, 2003Assignee: Gramtec Innovation ABInventor: Finn Gramnäs
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Patent number: 6572658Abstract: A knee prosthesis comprising two pivotally interconnected members (10, 11) carrying a locking device (17) and a first end a second axle (20, 21). The first axle (20) forms a bearing axle for the locking device and the second axle (21) cooperates with the locking device for activation thereof. The second axle (21) is located at a distance behind the first axle (20) and is arranged to act upon the locking device in such a way that when the line of action (26) from a load on the knee prosthesis passes through the second axle (21) or between the first (20) and the second axle, said second axle will act upon the locking device to activate it, while when said line of action (26) passes through the first axle or in front of it the second axle (21) will be unloaded and the locking device (17) inactivated.Type: GrantFiled: September 20, 2000Date of Patent: June 3, 2003Assignee: Gramtec Innovations ABInventor: Finn Gramnas
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Patent number: 6402789Abstract: A locking device for securing a prosthesis to a cylindrical part attached to a wearer. The device allows insertion of the cylindrical part, such as a pin, to be inserted into the locking mechanism at an oblique angle.Type: GrantFiled: May 25, 2000Date of Patent: June 11, 2002Inventor: Finn Gramnäs
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Patent number: 6302918Abstract: A device in a leg prosthesis provided with a shock- and torque absorber intended to absorb shocks as well as rotational movements which occur when the foot hits the ground during walking, running, jumping etc. and comprising two parts (10, 11) which are telescopically displaceable and rotatable with sect to each other. Mhm device further comprises a first resilient member (12) arranged between the two telescopic pars (10, 11) and said resilient member is arranged to be compressed at a telescopic movement of said parts in a retracting direction, that a second resilient member (19) is attached to the outer telescopic part (10) and limitedly displaceable in the inner telescopic part (11) limiting the telescopic movement as well as the rotational movement thereof in the outer telescopic part (10).Type: GrantFiled: November 29, 1999Date of Patent: October 16, 2001Assignee: Gramtec Innovation ABInventor: Finn Gramnäs
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Patent number: 6235062Abstract: A fastening device for a prosthesis, the fastening device having a cylindrical channel and an inclined washer designed to accept insertion of a cylindrical inset, such as a tube, bar or peg, with minimal resistance and yet substantially prevent withdrawal of the cylindrical insert from the fastening device unless a release mechanism is operated to permit withdrawal. The device permits rotation of the cylindrical inset with respect to the fastening device while still securely fastening the cylindrical insert within the fastening device, so as to prevent unlocking of the device and separation of the cylindrical insert.Type: GrantFiled: April 12, 2000Date of Patent: May 22, 2001Inventor: Finn Gramnas
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Patent number: 6159248Abstract: A knee prosthesis has two pivotally interconnected members (10,11) carrying a locking device (17) and a first end a second axle (20,21). The first axle (20) forms a bearing axle for the locking device and the second axle (21) cooperates with the locking device for activation thereof. The second axle (21) is located at a distance behind the first axle (20) and is arranged to act upon the locking device in such a way that when the line of action (26) from a load on the knee prosthesis passes through the second axle (21) or between the first (20) and the second axle, said second axle will act upon the locking device to activate it, while when said line of action (26) passes through the first axle or in front of it the second axle (21) will be unloaded and the locking device (17) inactivated.Type: GrantFiled: February 16, 1999Date of Patent: December 12, 2000Assignee: Gramtec Innovation ABInventor: Finn Gramnas
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Patent number: 6123732Abstract: An adjustable adapter (13) for lower leg prostheses including an adapter housing (14) attachable to the lower leg prosthesis (2), a spheroidal adapter head (8) rotatable inside the housing (14) and a prosthesis collar attachment member (4) that can be shifted sideways relative to the adapter head (8), which member (4) can be fastened to a prosthesis collar (5) whereby the spheroidal part (12) of the adapter head (8) is on the exterior of the essentially tube shaped adapter head (8) having an internally tube shaped part in which there are parts (26, 27, 28) arranged to allow the prosthesis collar attachment member (4) to be shifted sideways.Type: GrantFiled: April 11, 1997Date of Patent: September 26, 2000Assignee: Gramtec Innovation ABInventor: Finn Gramnas
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Patent number: 6093210Abstract: A fastening device for a prosthesis, the fastening device having a cylindrical channel and inclined washer designed to accept insertion of a cylindrical insert, such as a tube, bar or peg, with minimal resistance and yet substantially prevent withdrawal of the cylindrical insert from the fastening device unless a release mechanism is operated to permit withdrawal. The device permits rotation of the cylindrical insert with respect to the fastening device while still securely fastening the cylindrical insert within the fastening device, so as to prevent unlocking of the device and separation of the cylindrical insert.Type: GrantFiled: February 23, 1999Date of Patent: July 25, 2000Inventor: Finn Gramnas