Dale T Berry

US Patent:

6743252, Jun 1, 2004

Filed:

Dec 16, 1999

Appl. No.:

09/464895

Inventors:

Brian L. Bates - Bloomington IN
Dale T. Berry - West Lafayette IN
Neal E. Fearnot - West Lafayette IN
Coy M. Herald - West Lafayette IN
Palle M. Hansen - Bjaeverskov, DK
Jesper Thyregod - Roskilde, DK

Assignee:

Cook Incorporated - Bloomington IN
William Cook Europe ApS - Bjaeverskov
MED Institute Incorporated - West Lafayette IN

International Classification:

A61F 206

US Classification:

623 115

Abstract:

A stent ( ) formed from cannula and having flexible segments ( ) and high hoop strength segments ( ) alternating therealong. Axial tie bars ( ) interconnect the segments; minimal length reduction would occur upon expansion. In the high hoop strength segment ( ), struts ( ) are initially parallel in the unexpanded strut condition, while in the flexible segment ( ), struts ( ) extend from a respective bight ( ) to converge at distal ends when unexpanded. In one embodiment, certain adjacent struts ( ) of the hoop segment are spaced apart by a large gap ( ) while others are spaced apart by a small gap ( ). In another embodiment all the struts ( ) of the hoop segment are spaced apart uniformly from each other (or from an axial tie bar) by a small gap ( ), resulting in minimizing the occurrence of fatigue of high-stress sites upon expansion/contraction cycles from continuous pulsatile events.

US Patent:

62315986, May 15, 2001

Filed:

Sep 24, 1998

Appl. No.:

9/160122

Inventors:

Dale T. Berry - West Lafayette IN
Coy M. Herald - West Lafayette IN
Brian L. Bates - Bloomington IN
Scott E. Boatman - Bloomington IN
Michael C. Hoffa - Bloomington IN
Neal E. Fearnot - West Lafayette IN
William D. Voorhees - West Lafayette IN

Assignee:

MED Institute, Inc. - West Lafayette IN
Cook Incorporated - Bloomington IN

International Classification:

A61F 206

US Classification:

623 115

Abstract:

A radially expandable stent (10) made from a cannula or sheet of biocompatible material that includes at least one longitudinal segment (14) comprised of a series of laterally interconnected closed cells (13). Each closed cell of a longitudinal segment is defined laterally by a pair of longitudinal struts (15, 16) that are interconnected at each end by a circumferentially adjustable member (19, 20). When the stent is expanded using a balloon (47), the opposing circumferentially adjustable members deform to allow circumferential expansion of the longitudinal segment, while the length of the segment, as defined by the longitudinal struts, is maintained. Self-expanding versions of the stent utilize a nickel-titanium alloy. Adjacent longitudinal segments are joined by flexible interconnection segments (21) that permit the stent to bend laterally. The flexible interconnection segment is comprised of curvilinear struts (22, 23) that form a series of serpentine bends (81) that distribute lateral bending forces.

US Patent:

59680881, Oct 19, 1999

Filed:

Mar 7, 1997

Appl. No.:

8/813650

Inventors:

Palle M. Hansen - Roskilde, DK
Timothy G. Vendrely - Lafayette IN
Dale Berry - West Lafayette IN
Coy M. Herald - Lafayette IN

Assignee:

William Cook, Europe A/S

International Classification:

A61F 206

US Classification:

623 1

Abstract:

An expandable endovascular stent comprises a flexible, tubular body (1) with a longitudinal axis, the wall of which is formed by interconnected, closed lattice cells (2) arranged with at least two cells adjacent to each other in the circumferential direction. Filament-shaped lattice material capable of transmitting compressive forces in the axial direction of the filament extends continuously from one lattice cell directly into the lattice cell following in the longitudinal direction. The stent can be expanded from a radially compressed state into a radially expanded state having a larger diameter. In the expanded state of the stent, the pressure transmitting lattice material in several of the lattice cells (2) forms a heart-like or arrowhead-like shape with at least two interconnected diverging, angle. beta. cell sides (5) positioned opposite to and interconnected with at least two mutually converging, angle. alpha. longer cell sides (3).