USD458372S1 - Combination disc cutter and spinal vertebral spreader - Google Patents

Combination disc cutter and spinal vertebral spreader Download PDF

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Publication number
USD458372S1
USD458372S1 US29/131,594 US13159400F USD458372S US D458372 S1 USD458372 S1 US D458372S1 US 13159400 F US13159400 F US 13159400F US D458372 S USD458372 S US D458372S
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US
United States
Prior art keywords
spreader
disc cutter
combination disc
spinal vertebral
spinal
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
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US29/131,594
Inventor
Robert A Dixon
Donald J Hackman
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
SPECIALIST PROPERTIES LLC
Altus Partners LLC
Original Assignee
Individual
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Publication date
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Priority to US29/131,594 priority Critical patent/USD458372S1/en
Application granted granted Critical
Publication of USD458372S1 publication Critical patent/USD458372S1/en
Assigned to SPECIALIST PROPERTIES, LLC reassignment SPECIALIST PROPERTIES, LLC ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: DIXON, ROBERT A
Assigned to CARDO MEDICAL, INC. reassignment CARDO MEDICAL, INC. ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: VERTEBRON, INC.
Assigned to VERTEBRON INC. reassignment VERTEBRON INC. ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: HACKMAN, DONALD J, DIXON, ROBERT A
Assigned to ALTUS PARTNERS, LLC reassignment ALTUS PARTNERS, LLC ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: CARDO MEDICAL, INC., A DELAWARE CORPORATION
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Description

The combination disc cutter and spinal vertebral spreader is used to remove a portion of a damaged human spinal disc with a novel “Z” shaped knife at the working end of the tool. The act of removing a portion of the disc, as the tool is inserted, allows the spreader to reach the center of the vertebral end plates. Once the spreader portion is centered between the two vertebrae, the combination disc cutter and spinal vertebral spreader can be rotated one quarter of a turn, allowing its uniquely configured cutout notches to avoid vertebral protrusions as the cam surfaces spread the vertebrae, returning them to their original spacing. Once the tool has been rotated, the flat portions adjacent to the cam surfaces lock the spreader into the spread position. A graft material may be inserted to maintain normal vertebral position after the tool is removed.
FIG. 1 is a left side view of the combination disc cutter and spinal vertebral spreader with the cutter knife at the left end of FIG. 1.
FIG. 2 is a right side view of the combination disc cutter and spinal vertebral spreader.
FIG. 3 is a top view showing the shaded cam surfaces thereof; the bottom view being the mirror image thereof;
FIG. 4 is an end view looking toward the knife end, showing the upper and lower cam profiles, the knife edge, and the oblique surfaces blending the transition from the flat surfaces to the “Z” shape of the knide edge thereof.
FIG. 5 is a cross section view along the line 5—5 of FIG. 1, showing upper and lower notch sides.
FIG. 6 is a view of the “Z” shaped knife-edge viewed from the same point as FIG. 4, but showing only the knife edge surface with no depth into the plane of 6—6 in FIG. 1; and,
FIG. 7 is an enlarged cross section view along the line 7—7 of FIG. 1, showing the upper and lower cam profiles and the oblique surfaces blending the flat surface into the cutter knife edge profiles.
The broken line showing of the handle is for illustrative purposes only and forms no part of the claimed design.

Claims (1)

  1. The ornamental design for a combination disc cutter and spinal vertebral spreader, as shown and described.
US29/131,594 2000-10-25 2000-10-25 Combination disc cutter and spinal vertebral spreader Expired - Lifetime USD458372S1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
US29/131,594 USD458372S1 (en) 2000-10-25 2000-10-25 Combination disc cutter and spinal vertebral spreader

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US29/131,594 USD458372S1 (en) 2000-10-25 2000-10-25 Combination disc cutter and spinal vertebral spreader

Publications (1)

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USD458372S1 true USD458372S1 (en) 2002-06-04

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US29/131,594 Expired - Lifetime USD458372S1 (en) 2000-10-25 2000-10-25 Combination disc cutter and spinal vertebral spreader

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20020026191A1 (en) * 2000-08-10 2002-02-28 Dixon Robert A. Cam action vertebral spreader

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5722977A (en) 1996-01-24 1998-03-03 Danek Medical, Inc. Method and means for anterior lumbar exact cut with quadrilateral osteotome and precision guide/spacer
US5803904A (en) 1997-10-28 1998-09-08 Mehdizadeh; Hamid Nerve root retractor and disc space separator
US6030390A (en) 1999-01-08 2000-02-29 Mehdizadeh; Hamid M. Disc space spreader

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5722977A (en) 1996-01-24 1998-03-03 Danek Medical, Inc. Method and means for anterior lumbar exact cut with quadrilateral osteotome and precision guide/spacer
US5803904A (en) 1997-10-28 1998-09-08 Mehdizadeh; Hamid Nerve root retractor and disc space separator
US6030390A (en) 1999-01-08 2000-02-29 Mehdizadeh; Hamid M. Disc space spreader

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20020026191A1 (en) * 2000-08-10 2002-02-28 Dixon Robert A. Cam action vertebral spreader
US6709438B2 (en) * 2000-08-10 2004-03-23 Robert A Dixon Cam action vertebral spreader

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