Joseph M Perra

US Patent:

7803174, Sep 28, 2010

Filed:

Nov 4, 2005

Appl. No.:

11/266991

Inventors:

Francis Denis - Minneapolis MN, US
Timothy Garvey - Edina MN, US
Joseph Perra - Shoreview MN, US
Manuel Pinto - Minnetonka MN, US
James Schwender - Edina MN, US
Ensor Transfeldt - Edina MN, US
Michael S. Veldman - Memphis TN, US
William A. Rezach - Atoka TN, US

Assignee:

Warsaw Orthopedic, Inc. - Warsaw IN

International Classification:

A61B 17/70

US Classification:

606250, 606278

Abstract:

An orthopedic implant is disclosed having at least one passage for an elongated member that is compressible. In certain embodiments, multiple compressible elongated member passages may be provided, or an elongated member passage may be U-shaped and closable by a closure member. Split ring members may be provided in compressible passages and around elongated members. A bone anchor may be connected to the implant so that locking the anchor to the implant compresses one or more of the elongated member passages.

US Patent:

8075604, Dec 13, 2011

Filed:

Feb 16, 2006

Appl. No.:

11/355877

Inventors:

Francis Denis - Minneapolis MN, US
Timothy A. Garvey - Edina MN, US
Joseph H. Perra - Shoreview MN, US
Manuel Pinto - Minnetonka MN, US
James D. Schwender - Edina MN, US
Ensor Transfeldt - Edina MN, US
Michael S. Veldman - Memphis TN, US
William A. Rezach - Atoka TN, US

Assignee:

Warsaw Orthopedic, Inc. - Warsaw IN

International Classification:

A61B 17/04
A61B 17/86
A61F 2/08

US Classification:

606315

Abstract:

A bone screw comprising a threaded shank including a distal end portion and a proximal end portion, and defining a first threaded section extending from the distal end portion toward the proximal end portion and adapted for anchoring in cancellous bone, and a second threaded section extending contiguously from the first threaded section toward the proximal end portion and adapted for engagement in cortical bone, with the second threaded section having a finer thread pattern relative to the first threaded section. In one embodiment, the first threaded section includes a first helical threading defining a single lead thread pattern for anchoring in cancellous bone, and the second threaded section includes a second helical threading interleaved with the first threading to define a duel lead thread pattern for engagement in cortical bone. In a further embodiment, the bone screw includes a head portion extending from the threaded shank and configured for coupling to a spinal implant.

US Patent:

20120116464, May 10, 2012

Filed:

Dec 12, 2011

Appl. No.:

13/323546

Inventors:

Franics Denis - Minneapolis MN, US
Timothy A. Garvey - Edna MN, US
Joseph H. Perra - Shoreview MN, US
Manuel Pinto - Minnetonka MN, US
James D. Schwender - Edna MN, US
Ensor Transfeldt - Edna MN, US
Michael S. Veldman - Memphis TN, US
William A. Rezach - Atoka TN, US

Assignee:

WARSAW ORTHOPEDIC, INC - Warsaw IN

International Classification:

A61B 17/86

US Classification:

606308, 606315

Abstract:

A bone screw comprises a threaded shank including a distal end portion and a proximal end portion, and defining a first threaded section extending from the distal end portion toward the proximal end portion and adapted for anchoring in cancellous bone. A second threaded section extends contiguously from the first threaded section toward the proximal end portion The second threaded section has a finer thread pattern relative to the first threaded section. In one embodiment, the first threaded section includes a first helical threading defining a single lead thread pattern for anchoring in cancellous bone, and the second threaded section includes a second helical threading interleaved with the first threading to define a duel lead thread pattern for engagement in cortical bone. In a further embodiment, the bone screw includes a head portion extending from the threaded shank and configured for coupling to a spinal implant.

US Patent:

6443953, Sep 3, 2002

Filed:

Mar 6, 2000

Appl. No.:

09/518961

Inventors:

Joseph Perra - Shoreview MN
Rolando Puno - Prospect KY
Philip A. Mellinger - Las Flores CA

Assignee:

Cross Medical Products, Inc. - Irvine CA

International Classification:

A61B 1770

US Classification:

606 61, 606 73

Abstract:

A spinal implant system is provided having a stabilization rod, a plurality of bone anchors which could be either hooks or screws and which have an internal recess that defines a rod-receiving channel. Sidewalls of the anchor project beyond the recess, and are threaded on the outside. These external threads cooperate with the internal threads of a locking member, or cap nut, which has a top surface with a cavity that includes an internal hexagon. The internal threads are on the inside of the cylindrical sidewalls of the cap nut. Further, on the bottom side of the top surface, the cap nut has a guide member in the form of a cylindrical boss, which has a smaller diameter than that of the recess within the anchor. The boss helps to prevent cross threading and to prevent collapse of the anchor sidewalls under high forces. An annular ridge on the bottom of the boss further helps to retain the rod relative to the anchor.

US Patent:

20210236178, Aug 5, 2021

Filed:

Jan 30, 2020

Appl. No.:

16/776546

Inventors:

- Warsaw IN, US
Joseph H. Perra - Wayzata MN, US

International Classification:

A61B 17/70

Abstract:

A spinal-correction system having (i) a receiver including a base and opposing arms extending proximally from the base forming a rod-receiving cavity, (ii) a pair of extender tabs, each extender tab having threaded inner walls for receiving threads of a setscrew, (iii) a pair of tab extenders each being connectable releasably to one of the extender tabs, (iv) a cap instrument connectable releasably to the tab extenders, and (v) a pair of breakoff sections, each connecting one of the extender tabs to one of the receiver arms, and each being readily breakable for separating the extender tab from the receiver arm. The distal base defines a bonescrew cavity to receive a bonescrew head so that the head can move relative to the base. Each receiver arm has threaded inner walls for receiving setscrew threads. The rod-receiving cavity has geometry corresponds to geometry of the setscrew and a spinal-correction rod.

US Patent:

20210220034, Jul 22, 2021

Filed:

Jan 17, 2020

Appl. No.:

16/746024

Inventors:

- Warsaw IN, US
Joseph H. Perra - Wayzata MN, US

International Classification:

A61B 17/88

Abstract:

An orthopaedic driving instrument including a first end portion, a second end portion opposite the first end portion, and a central portion, intermediate the first and second end portions, comprising a central section having an outer diameter representing a maximum outer diameter of the driving instrument. The first end comprises a first driving interface sized and shaped to, in operation of the instrument, engage a screw interface of a screw for applying torque to the screw. The second end comprises a second driving interface sized and shaped as the size and shape of the first driving interface.

US Patent:

20160113693, Apr 28, 2016

Filed:

Dec 31, 2015

Appl. No.:

14/985903

Inventors:

- Warsaw IN, US
Timothy A. Garvey - Edna MN, US
Joseph H. Perra - Shoreview MN, US
Manuel Pinto - Minnetonka MN, US
James D. Schwender - Edna MN, US
Ensor Transfeldt - Edna MN, US
Michael Veldman - Memphis TN, US

International Classification:

A61B 17/86
A61B 17/70

Abstract:

A bone screw comprises a threaded shank including a distal end portion and a proximal end portion, and defining a first threaded section extending from the distal end portion toward the proximal end portion and adapted for anchoring in cancellous bone. A second threaded section extends contiguously from the first threaded section toward the proximal end portion. The second threaded section has a finer thread pattern relative to the first threaded section. In one embodiment, the first threaded section includes a first helical threading defining a single lead thread pattern for anchoring in cancellous bone, and the second threaded section includes a second helical threading interleaved with the first threading to define a duel lead thread pattern for engagement in cortical bone. In a further embodiment, the bone screw includes a head portion extending from the threaded shank and configured for coupling to a spinal implant.