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Browse by: INVENTOR PATENT HOLDER PATENT NUMBER DATE
 
 
Inventor:
Swanson; William J.
Address:
St. Paul, MN
No. of patents:
39
Patents:












Patent Number Title Of Patent Date Issued
D416649 Face shield with protective lens November 16, 1999
8236227 Method for building three-dimensional models in extrusion-based digital manufacturing systems us August 7, 2012
A consumable material for use in an extrusion-based digital manufacturing system, the consumable material comprising a topographical surface pattern that is configured to engage with a drive mechanism of the extrusion-based digital manufacturing system.
8221669 Method for building three-dimensional models in extrusion-based digital manufacturing systems us July 17, 2012
A consumable material for use in an extrusion-based digital manufacturing system, the consumable material comprising a length and a cross-sectional profile of at least a portion of the length that is axially asymmetric. The cross-sectional profile is configured to provide a response time
8187164 Methods and apparatus for treating body tissue sphincters and the like May 29, 2012
A plurality of structures that resiliently attract one another are provided for implanting in a patient around a body tissue structure of the patient. For example, the body tissue structure may be the esophagus, and the plurality of structures may be implanted in an annulus around the
8109947 Medical grafting methods and apparatus February 7, 2012
Methods and apparatus for delivering and installing a new length of tubing between two sections of a patient's existing body organ tubing and at least partly outside of that existing structure. For example, the new length of tubing may be for the purpose of providing the patient with a
8033811 Pantograph assembly for digital manufacturing system October 11, 2011
A digital manufacturing system for producing first and second objects comprises a platen, a gantry, a pantograph extrusion head system and first and second sets of extruders. The platen defines a workspace upon which the objects are produced. The gantry defines a headspace displaced
7897074 Liquefier assembly for use in extrusion-based digital manufacturing systems March 1, 2011
A liquefier assembly comprising a liquefier tube, where the liquefier tube comprises a sidewall having an inlet opening configured to receive a filament strand, an outlet opening, and a port disposed through the sidewall at a location between the inlet opening and the outlet opening,
7896209 Filament drive mechanism for use in extrusion-based digital manufacturing systems March 1, 2011
A filament drive mechanism comprising a rotatable component comprising a central hole defined at least in part by an internally-threaded surface, and is configured to receive a filament strand through the central hole to engage the internally-threaded surface with the filament strand. Th
7891964 Viscosity pump for extrusion-based deposition systems February 22, 2011
A pump system comprising a delivery assembly configured to feed a solid material under operational power of a first drive motor, and a screw pump comprising a housing that at least partially defines a barrel of the screw pump, an extrusion tip secured to the housing at a first end of the
7695427 Methods and apparatus for treating body tissue sphincters and the like April 13, 2010
A plurality of structures that resiliently attract one another are provided for implanting in a patient around a body tissue structure of the patient. For example, the body tissue structure may be the esophagus, and the plurality of structures may be implanted in an annulus around the
7569072 Artificial heart valve attachment apparatus and methods August 4, 2009
Heart valve attachment apparatus and methods that significantly reduce attachment times are provided. The apparatus and methods utilize a connector band to form an interface between a uni-directional valve and a tissue annulus. The connector band is secured to the tissue annulus by r
7422602 Medical grafting methods and apparatus September 9, 2008
Methods and apparatus for making an anastomotic connection between first and second tubular fluid conduits are provided. For example, a connector may be configured for attachment to the first and second tubular fluid conduits and have an interior thereof substantially accessible to the
7374712 Method for building three-dimensional models from thermoplastic modeling materials May 20, 2008
The present invention is a method and apparatus for building three-dimensional models by deposition modeling techniques from moisture-sensitive thermoplastics. A feedstock of thermoplastic modeling material is dried to a low moisture content and supplied to a dispensing head of a mod
7361181 Apparatus and methods for creating anastomoses April 22, 2008
Apparatus and methods for creating anastomoses are provided. An incision tool for creating an incision having a controlled length in a side wall of a patient's body tissue conduit is provided. A delivery device for inserting a hollow annular connector into an incision in a side wall of a
7297304 High-temperature modeling method November 20, 2007
A method for three-dimensional modeling builds up three-dimensional objects in a heated build chamber by dispensing modeling material from a dispensing head onto a base in a predetermined pattern. Physical and thermal separation are maintained between the heated build chamber and mot
7172715 Filament spool auto-change in a modeling machine February 6, 2007
A filament cassette and a filament loading assembly supply modeling filament to a liquifier in a three-dimensional deposition modeling machine. Two or more cassettes containing spooled filament are inserted into the machine. A strand of filament from a first one of the cassettes is f
7169337 Method for loading filament in an extrusion apparatus January 30, 2007
Filament is loaded into an extrusion apparatus, such as a three-dimensional deposition modeling machine, by inserting a cassette containing filament into the apparatus. A filament strand from the cassette is then advanced into the machine, such as by operating a thumb wheel or a foll
7147663 Artificial heart valve attachment apparatus and methods December 12, 2006
Heart valve attachment apparatus and methods that significantly reduce attachment times are provided. The apparatus and methods utilize a connector band to form an interface between a uni-directional valve and a tissue annulus. The connector band is secured to the tissue annulus by r
7127309 Modeling apparatus with tray substrate October 24, 2006
A modeling apparatus includes a platform and a substrate, which are adapted to be releasably locked together to provide a surface for building up models in an additive-process three-dimensional modeling machine. The substrate comprises a substantially rigid, non-dusting tray providin
6960219 Medical grafting methods and apparatus November 1, 2005
Methods and apparatus for making an anastomotic connection between first and second tubular fluid conduits are provided. For example, a connector may be configured for attachment to the first and second tubular fluid conduits and have an interior thereof substantially accessible to the
6923634 Filament loading system in an extrusion apparatus August 2, 2005
An apparatus which extrudes flowable material from a liquifier includes a system for loading filament supplied in a cassette. The cassette is loaded into a loading bay of the apparatus. A strand of filament from the cassette is engaged and advanced along a path to the liquifier using a
6920882 Medical grafting methods and apparatus July 26, 2005
Methods and apparatus for delivering and installing a new length of tubing between two sections of a patient's existing body organ tubing and at least partly outside of that existing structure. For example, the new length of tubing may be for the purpose of providing the patient with a
6866674 Medical grafting methods and apparatus March 15, 2005
Methods and apparatus for making an anastomotic connection between a first conduit and a second conduit. A connector structure having a first end portion and a second end portion is positioned about a balloon catheter, which when pressurized, expands to a significant extent at the distal
6776602 Filament cassette and loading system August 17, 2004
Disclosed are a filament cassette and a filament loading assembly for supplying filament in a three-dimensional deposition modeling machine. The filament cassette contains a rotatable spool of filament, and has an exit orifice through which a filament strand may exit the cassette. The
6722872 High temperature modeling apparatus April 20, 2004
Disclosed is a three-dimensional modeling apparatus (10) that builds up three-dimensional objects in a heated build chamber (24) by dispensing modeling material from a dispensing head (14) onto a base (16) in a pattern determined by control signals from a controller (140). The motion
6712836 Apparatus and methods for closing septal defects and occluding blood flow March 30, 2004
Plugs and methods for plugging septal defects and blood vessels are provided. Plugs are delivered via catheter to a septal defect or a location where it is desired to occlude blood flow in a blood vessel. The plugs are positioned and expanded at the treatment site. The expansion of t
6685866 Method and apparatus for three-dimensional modeling February 3, 2004
Disclosed are an apparatus and method for three-dimensional deposition modeling, which shield a supply of modeling filament fed through a deposition modeling machine from exposure to environmental moisture. Dry gas under pressure is supplied to a filament path leading from a material
6602263 Medical grafting methods and apparatus August 5, 2003
Methods and apparatus for making an anastomotic connection between a first conduit and a second conduit. A connector structure having a first end portion and a second end portion is positioned about a balloon catheter, which when pressurized, expands to a significant extent at the distal
6533812 Medical anastomosis apparatus March 18, 2003
A connector for use in providing an anastomotic connection between two tubular body fluid conduits in a patient. The connector is preferably a single, integral, plastically deformable structure that can be cut from a tube. The connector has axial spaced portions that include members that
6511491 Medical grafting methods and apparatus January 28, 2003
Methods and apparatus for making an anastomotic connection between first and second tubular fluid conduits are provided. For example, a connector may be configured for attachment to the first and second tubular fluid conduits and have an interior thereof substantially accessible to the
6508252 Medical grafting methods and apparatus January 21, 2003
Methods and apparatus for delivering and installing a new length of tubing between two sections of a patient's existing body organ tubing and at least partly outside of that existing structure. For example, the new length of tubing may be for the purpose of providing the patient with a
6440163 Medical anastomosis apparatus August 27, 2002
A connector for use in providing an anastomotic connection between two tubular body fluid conduits in a patient. The connector is preferably a single, integral, plastically deformable structure that can be cut from a tube. The connector has axial spaced portions that include members that
6309416 Medical anastomosis apparatus October 30, 2001
A connector for use in providing an anastomotic connection between two tubular body fluid conduits in a patient. The connector is preferably a single, integral, plastically deformable structure that can be cut from a tube. The connector has axial spaced portions that include members that
6279573 Breathing tube connection for respiratory protective headgear August 28, 2001
A connector for attachment of a breathing tube to a respirator. The connector includes a first conduit and a transition conduit that form a connector body. A cantilevered snap latch extends from the connector body. A connector assembly including a recessed receiving structure on a re
6113612 Medical anastomosis apparatus September 5, 2000
A connector for use in providing an anastomotic connection between two tubular body fluid conduits in a patient. The connector is preferably a single, integral, plastically deformable structure that can be cut from a tube. The connector has axial spaced portions that include members that
6102033 Attachment system for replacement helmet respirator lens August 15, 2000
A replaceable lens attachment system for respiratory devices and methods of use. The replaceable lens attachment system includes a face shield having rotatable attachment members and a replaceable lens. The rotatable attachment members include cams and flanges. The attachment system may
6004124 Thin-wall tube liquifier December 21, 1999
A rapid prototyping system has a liquifier carried by a extrusion head. The liquifier is formed of a single piece of thin-wall tubing preferably made of metal, encased in a heating block. The thin-wall tube has a inlet end for receiving a filament of molding material and an outlet end fo
5743876 Catheter having shaft of varying stiffness April 28, 1998
A medical device such as a catheter is described having a stiff, preferably metallic, proximal tube. The distal portion of the proximal tube may have a plurality of perforations or slots formed therein to increase its flexibility. This provides a smooth transition between the relatively
5605543 Catheter having shaft of varying stiffness February 25, 1997
A medical device such as a catheter is described having a stiff, preferably metallic, proximal tube. The distal portion of the proximal tube may have a plurality of perforations or slots formed therein to increase its flexibility. This provides a smooth transition between the relatively










 
 
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