US 6,132,448 A · Endoscopic irrigated bur

Abstract

A cutting blade assembly for use with a handpiece having a motor for rotatably driving the cutting blade assembly. The handpiece has a bore therein for receiving the cutting blade assembly. The cutting blade assembly includes an elongate tubular outer member having a distal end with an opening thereat, a proximal end, a hub unremovably secured to the proximal end so as to be a permanent part of the outer member. The hub is configured to be directly received and engaged in the handpiece bore. An elongate inner member is received in the outer member and has a distal cutting end disposed adjacent the opening in the distal end of the outer member. A proximal end of the inner member is adapted to be received in the handpiece bore and rotatably driven by the motor to rotate the inner member in the outer member. The cutting blade assembly includes the elongate tubular outer member having a radially inwardly facing surface along the length thereof with at least one elongate axially extending groove therein, the groove terminating at both the proximal and distal ends of the outer member. The cutting blade assembly also includes the outer member additionally having an irrigation liquid connection structure and a window through a wall of the outer member for providing liquid communication between the liquid connection structure and the elongate axially extending groove so that liquid will traverse the axial extent of the groove and to the opening. Bearings relatively rotatably support the inner and outer members and the irrigation liquid bypasses the bearings through the groove.

Claims18

Dependent claims

A disposable, limited use surgical tool for use with a powered handpiece with motor means for rotatably driving said surgical tool, the handpiece having a housing and bore means therein for receiving said surgical tool, said surgical tool comprising:

an elongate tubular outer member having a distal end with an opening thereat, a proximal end, a proximal end hub secured to the proximal end so as to be a permanent part of said outer member, said hub being configured to be directly received and engaged in said handpiece bore means and to said housing;
an elongate inner member received in said outer member and having a distal end disposed adjacent said opening in said distal end of said outer member, and a proximal end adapted to be received in the handpiece bore means and rotatably driven by the motor means to rotate said inner member in said outer member;
an improvement wherein said elongate tubular outer member has a radially inwardly facing surface having along a length thereof at least one elongate axially extending groove therein, said at least one elongate axially extending groove terminating at said proximal and distal ends of said elongate tubular outer member;
and
wherein said hub on said elongate tubular outer member includes means defining an irrigation liquid connection means, and wherein a window is provided through a wall of said elongate tubular outer member for providing liquid communication between said liquid connection means and said at least one elongate axially extending groove so that liquid will traverse the axial extent of said elongate axially extending groove and to said opening.

2 more elements

Dependencies are inferred from the claim text.

Endoscopic irrigated bur

Life of this patent

Endoscopic irrigated bur

Life of this patent

Abstract

Claims18