SURGICAL SAGITTAL SAW BLADE INCLUDING A GUIDE BAR, A BLADE HEAD AND DRIVE RODS FOR PIVOTING THE BLADE HEAD

• US 20090138017A1
• Filed: 12/15/2008
• Published: 05/28/2009
• Est. Priority Date: 07/09/2004
• Status: Active Grant

• Current Assignee: Alessandro F. Canonaco, Carlos E. Collazo, David J. Neal, Eric Rugo, Gregory E. Plaskon, Steven Carusillo
• Original Assignee: Alessandro F. Canonaco, Carlos E. Collazo, David J. Neal, Eric Rugo, Gregory E. Plaskon, Steven Carusillo
• Inventors: Collazo, Carlos E., Carusillo, Steven, Canonaco, Alessandro F., Neal, David J., Rugo, Eric, Plaskon, Gregory E.
• Granted Patent: US 8,043,292 B2
• Time in Patent Office: Days
• US Class Current: 606/82
• CPC Class Codes: A61B 17/14 Surgical saws A61B17/1637 takes precedence; tooth saws A61C3/12 ; Accessories therefor
• CPC Class Codes: A61B 17/142 with reciprocating saw blades, e.g. with cutting edges at the distal end of the saw blades
• CPC Class Codes: A61B 17/144 with cutting edges at the side of the saw blades
• CPC Class Codes: A61B 17/149 Chain, wire or band saws
• CPC Class Codes: A61B 17/157 Cutting tibia
• CPC Class Codes: B27B 19/006 with oscillating saw blades; Hand saws with oscillating saw blades

Abstract

A surgical sagittal saw blade that including a guide bar shaped to be releasably secured in a static position to a complementary surgical sagittal saw. A blade is mounted to the guide bar to pivot around a pivot point. The blade has teeth located outside of the guide bar. Drive rods extend from the blade. The drive rods connect to a complementary driver integral with the saw. When the saw driver is actuated, the drive rods undergo reverse reciprocation. The reciprocation of the driver rods cause the blade to oscillate around a pivot point.

Claims

1-55. -55. (canceled)

56. A blade assembly for attachment to a surgical sagittal saw, the saw having a head to which a driver is moveably mounted, said blade assembly having:

a guide bar having proximal and distal ends, the proximal end being shaped to be received by the saw head and having at least one feature that cooperates with a fastening unit so that the fastening unit releasably holds said guide bar in a static state to the saw head, the distal end of said guide bar having a thickness;

a blade including;

a base at least partially disposed inside said guide bar that is pivotally mounted to said guide bar adjacent the distal end of said guide bar; and

a head integral with said base that is located outside of said guide bar, said head having a thickness at least equal to the thickness of the distal end of said guide bar and having teeth; and

two drive rods that are connected to and that extend proximally away from said blade, said drive rods being connected to said blade on opposed sides of a pivot point, each said drive rod having a proximal end and a coupling feature that releasably couples said drive rods to the saw driver so that the actuation of the driver results in the simultaneous opposed reciprocation of said drive rods so that said drive rods oscillate said blade about the pivot point.

57. The surgical sagittal saw assembly of claim 56, wherein said drive rods are at least partially seated in said guide bar so as to be able to reciprocate within said guide bar and said guide bar is formed with at least one opening in which the proximal ends of said drive rods are located.

58. The surgical sagittal saw assembly of claim 56, wherein:

said drive rods are at least partially seated in said guide bar so as to be able to reciprocate within said guide bar; and

said guide bar is formed with an opening, the opening located between locations within said guide bar in which said drive rods are seated, the opening being the feature that cooperates with said handpiece fastening unit.

59. The surgical sagittal saw assembly of claim 56, wherein said blade and said drive rods are separate components and said drive rods are pivotally mounted to said blade.

60. The surgical sagittal saw assembly of claim 56, wherein:

a pivot pin is disposed in said guide bar; and

said blade base is seated against said pivot pin and said pivot pin defines the pivot point around which said blade oscillates.

61. The surgical sagittal saw assembly of claim 56, wherein:

said guide bar is formed with a static pin; and

a flexible tail extends from said blade base and said tail is mounted to said guide bar static pin.

62. The surgical sagittal saw assembly of claim 56, wherein:

internal to said guide bar is an inner bar that has a front face with a curved profile that is located inward of the distal end of said guide bar; and

said blade base is formed to have an arcuate face and is positioned so that the arcuate face of said blade base abuts the curved face of said guide bar inner bar so that said blade oscillates around said guide bar inner bar.

63. The surgical sagittal saw assembly of claim 56, wherein each said drive rod is provided with a separate one of said coupling features that couples said drive rod to the saw driver.

64. The surgical sagittal saw assembly of claim 56, wherein:

said guide bar includes two opposed bars that are held together and said drive rods are at least partially located between said opposed bars;

a pivot pin separate from said opposed bars is located between said opposed bars and secured to at least one of said opposed bars; and

said blade base is seated against said pivot pin and said pivot pin defines the pivot point around which said blade oscillates.

65. A blade assembly for attachment to a surgical sagittal saw, the saw having a head to which a driver is moveably mounted, said blade assembly having:

a guide bar having proximal and distal ends, the proximal end being shaped to be received by the saw head, the distal end of said guide bar having a thickness;

a blade including;

a base at least partially disposed inside said guide bar that is pivotally mounted to said guide bar adjacent the distal end of said guide bar; and

a head integral with said base that is located outside of said guide bar, said head having a thickness at least equal to the thickness of the distal end of said guide bar and said head having teeth; and

two drive rods that are connected to and that extend proximally away from said blade, said drive rods being connected to said blade on opposed sides of a pivot point, each said drive rod having a proximal end and a coupling feature that releasably couples said drive rods to the saw driver so that the actuation of the driver results in the simultaneous opposed reciprocation of said drive rods so that said drive rods oscillate said blade about the pivot point, said drive rods being at least partially located in said guide bar and being able to reciprocate in said guide bar,

wherein, said guide bar is formed with;

at least one first opening adjacent the proximal end of said guide bar, said at least one first opening being located between said drive rods and shaped to receive a fastening element that holds said guide bar in a static state to the saw head; and

at least one second opening adjacent the proximal end of said guide bar, said at least one second opening being separate from the at least one first opening, wherein said drive rod coupling feature is located in the guide bar at least one second opening.

66. The blade assembly of claim 65, wherein:

each said drive rod includes the said coupling feature; and

said guide bar is formed with two said second openings, each said drive rod coupling feature being located in a separate one of said guide bar second openings.

67. The blade assembly of claim 65, wherein:

said guide bar is formed with opposed side edges that extend between the proximal and distal ends of said guide bar and two second openings, each second opening being a cutout that extends inwardly from one of said guide bar side edges; and

each said drive rod has a coupling feature, each said coupling feature being located in a separate one of the guide bar second openings.

68. The surgical sagittal saw assembly of claim 65, wherein said blade and said drive rods are separate components and said drive rods are pivotally mounted to said blade.

69. The surgical sagittal saw assembly of claim 65, wherein:

a pivot pin is disposed in said guide bar; and

said blade base is seated against said pivot pin and said pivot pin defines the pivot point around which said blade oscillates.

70. A blade assembly for attachment to a surgical sagittal saw, the saw having a head to which a driver is moveably mounted, said blade assembly having:

a guide bar having proximal and distal ends, the proximal end being shaped to be received by the saw head and having at least one feature that cooperates with a fastening unit so that the fastening unit releasably holds said guide bar in a static state to the saw head, the distal end of said guide bar having a thickness;

a blade including;

a base at least partially disposed inside said guide bar that is pivotally mounted to said guide bar adjacent the distal end of said guide bar; and

a head integral with said base that is formed with teeth located outside of said guide bar, said teeth having a thickness at least equal to the thickness of the distal end of said guide bar; and

two drive rods that are connected to and that extend proximally away from said blade, said drive rods being connected to said blade on opposed sides of a pivot point, each said drive rod having a proximal end and a coupling feature that releasably couples said drive rods to the saw driver so that the actuation of the driver results in the simultaneous opposed reciprocation of said drive rods so that said drive rods oscillate said blade about the pivot point, said coupling feature being shaped to releasably engage the saw driver without supplemental fasteners.

71. The blade assembly of claim 70, wherein each said driver rod is provided with a separate said coupling feature for releaseably coupling said drive rod to said saw driver.

72. The blade assembly of claim 70, wherein:

said drive rods are at least partially disposed in said guide bar; and

said guide bar is formed with at least one opening located between said drive rods, the at least one opening being the feature for cooperating with the fastening unit that holds said guide bar static to the saw head.

73. The blade assembly of claim 70, wherein said blade and said drive rods are separate components and said drive rods are pivotally mounted to said blade.

74. The blade assembly of claim 70, wherein:

said guide bar is formed with two openings located toward the proximal end of said guide bar; and

each said drive rod is at least partially seated in said guide bar so as to be able to reciprocate within said guide bar and each said driver rod is provided with one said coupling feature for releaseably coupling said drive rod to said saw driver, each said coupling feature being disposed in a separate one of said guide bar openings.

75. The blade assembly of claim 70, wherein:

said coupling feature includes an opening in which a pin integral with the saw driver is seated.