Chris J Kingsbury

US Patent:

57163987, Feb 10, 1998

Filed:

Jan 23, 1995

Appl. No.:

8/376624

Inventors:

Robert Sparks - Austin TX
Chris Kingsbury - Laguna Hills CA
David W. Wieting - Costa Mesa CA

Assignee:

Baxter International, Inc. - Deerfield IL

International Classification:

A61F 224

US Classification:

623 2

Abstract:

A valve rotator comprising a body having a generally annular peripheral surface at one end of the body and a central cavity opening at such end. The annular peripheral surface substantially surrounds the central cavity and has an interlocking surface region configured to interlock with a rotor of a rotatable valve. The body had a generally annular shoulder adjacent such one end which generally faces such end of the body. The annular peripheral surface extends toward that end of the body from the annular shoulder.

US Patent:

59648007, Oct 12, 1999

Filed:

Aug 15, 1997

Appl. No.:

8/912021

Inventors:

Robert Sparks - Austin TX
Chris Kingsbury - Laguna Hills CA
David Wieting - Costa Mesa CA

Assignee:

Baxter International, Inc. - Deerfield IL

International Classification:

A61F 224

US Classification:

623 2

Abstract:

Methods for rotating a heart valve body rotatably mounted within a sewing ring. The valve body includes a plurality of drive surfaces on an inner periphery, and a rotator has a plurality of drive surfaces on an exterior periphery. The drive and driven surfaces are in registration only in discrete relative orientations of the two parts about a common axis of rotation. The drive surfaces may be greater in number than the driven surfaces, to reduce the rotational angle that the rotator must be turned before registering with the valve body. The drive and driven surfaces may be formed as flats on each respective part. In one embodiment, the rotator includes a cylindrical distal end with three pairs of diametrically opposed external flats, and the valve body includes a single pair of diametrically opposed internal flats. The rotator is designed so that a surgeon need only rotate it a maximum of 90. degree. in either direction.