Gregory A Martin

US Patent:

6554834, Apr 29, 2003

Filed:

Oct 7, 1999

Appl. No.:

09/414272

Inventors:

Yves Crozet - Ramsey NJ
Gregory Martin - New York NY

Assignee:

Stryker Spine

International Classification:

A61B 1756

US Classification:

606 65, 606 61, 606 72, 606 73

Abstract:

A pedicle screw assembly includes a fastener having an expandable head. The expandable head has an outer surface including a convex portion, a recess having an inner surface and defining an inner dimension, and at least one slot extending between the inner and outer surfaces thereof. The assembly also has an insert positionable at least partially in the recess having an outer surface defining an outer dimension that is greater than the inner dimension of the recess. The assembly includes a coupling element including a rod receiving opening, a bore for the fastener, and a seat for receiving the head of the fastener and allowing the fastener and coupling element to pivot relative to one another before being locked in place. After an orthopedic rod is positioned within the coupling element, a locking element associated with the coupling element locks the orthopedic rod in the rod-receiving opening. The locking element applies a force onto the rod to in turn force the insert into the recess of the expandable head for expanding the outer surface of the head against the seat of the coupling element and locking the coupling element and fastener from further pivotal movement relative to one another.

US Patent:

7182729, Feb 27, 2007

Filed:

Sep 17, 2004

Appl. No.:

10/943520

Inventors:

Mahmoud F. Abdelgany - Rockaway NJ, US
Gregory Martin - New York NY, US

Assignee:

Stryker Spine

International Classification:

A61B 1/32

US Classification:

600219, 600203

Abstract:

A retractor having interchangeable or replaceable blades facilitates the expansion of a surgical site below an incision in the skin, and establishes a work-through surgical space. The retractor includes a frame connected to two collar arms, a pair of blades connected to the collar arms, a sheath for encompassing the blades and providing a circumscribed working space, and a device for rotating the collar arms, thereby displacing the blades and any tissue surrounding them.

US Patent:

7988625, Aug 2, 2011

Filed:

Jan 12, 2007

Appl. No.:

11/652810

Inventors:

Mahmoud F. Abdelgany - Rockaway NJ, US
Gregory Martin - New York NY, US

Assignee:

Stryker Spine

International Classification:

A61B 1/32

US Classification:

600220

Abstract:

A retractor having interchangeable or replaceable blades facilitates the expansion of a surgical site below an incision in the skin, and establishes a work-through surgical space. The retractor includes a frame connected to two collar arms, a pair of blades connected to the collar arms, a sheath for encompassing the blades and providing a circumscribed working space, and a device for rotating the collar arms, thereby displacing the blades and any tissue surrounding them.

US Patent:

D3151140, Mar 5, 1991

Filed:

Sep 9, 1988

Appl. No.:

7/242070

Inventors:

Gregory C. Martin - Rockville MD

Assignee:

Pulse Electronics, Inc. - Rockville MD

US Classification:

D10114

US Patent:

46915630, Sep 8, 1987

Filed:

Nov 25, 1986

Appl. No.:

6/934922

Inventors:

Gregory C. Martin - Gaithersburg MD

Assignee:

Pulse Electronics, Inc. - Rockville MD

International Classification:

G01L 500
G01L 528

US Classification:

73129

Abstract:

An improved railroad coupler mount is provided for securely mounting railroad signalling and monitoring equipment (10) on the coupler of the last railroad car of a train. The railroad coupler mount includes a banana shape member (30) which extends through a pair of relief holes (22) in the knuckle (12) of the railroad car coupler. The railroad coupler mount has a tightening means (28) for partially withdrawing the banana shaped member and tightly pressing a support leg (20) against the side wall of the coupler to provide a secure mount which is free of rotation problems. The railroad coupler mount is secured with a locking device (26) which serves the dual function of resisting the total withdrawal of the banana shaped member when the railroad coupler mount is tightened as well as preventing the unauthorized removal of the signalling and monitoring equipment. The railroad coupler mount is attached in a position which avoids damage to the signalling and monitoring equipment due to accidental coupling.

US Patent:

48471704, Jul 11, 1989

Filed:

Sep 9, 1988

Appl. No.:

7/242122

Inventors:

Gregory C. Martin - Rockville MD

Assignee:

Pulse Electronics, Inc. - Rockville MD

International Classification:

H01M 210

US Classification:

429 1

Abstract:

End of train marker light equipment (10) has been designed with a battery compartment (13) which can receive either a lead/acid battery (100), a Ni/Cd battery pack (250) or a pair of lantern batteries (350 and 352). In a first configuration, the lead/acid battery (100) mates with an electrical connector (30) positioned on the back wall (20) of the battery compartment (13). In a second configuration, an adapter (200) is fitted into the battery compartment (13) to receive a Ni/Cd battery pack (250). The adapter (200) includes an electrical connector (218) which is copmlimentary to the electrical connector (30). In a third configuration, a pair of lantern batteries (350 and 352) are fitted in the battery compartment (13) to contact a contact pattern (300) positioned on the back wall (20). One of the batteries (350) is fitted into the battery compartment (13) on its side while the other battery (352) is fitted into the battery compartment (13) at an angle with its edges cooperating with grooves (26 and 28) in the sidewalls (16 and 18).

US Patent:

45922179, Jun 3, 1986

Filed:

May 7, 1985

Appl. No.:

6/731351

Inventors:

Emilio A. Fernandez - Rockville MD
Angel P. Bezos - Rockville MD
Gregory C. Martin - Rockville MD

Assignee:

Pulse Electronics, Inc. - Rockville MD

International Classification:

G01L 528

US Classification:

73129

Abstract:

An improved attaching device is provided for securely mounting railroad signalling and monitoring equipment (10, 12) on the coupler (36) of a railroad car. A package including a supporting frame (22) to which the equipment is fastened by a draw pull (16) rests on the top surface of the coupler. The supporting frame includes a mounting bracket (32) having an integral rod (50) which extends through the flag hole in the coupler knuckle. The end of the rod projects beyond the bottom of the coupler so that it can be secured. In the second embodiment (FIGS. 8 and 9), the rod (111) has bifurcated extensions (116, 118) which serve to strengthen the supporting frame (80). This embodiment also includes shock absorbing elements (108, 110 and 122). In a third embodiment, a post (162) slidably carries a shaft or rod (188) that is retractable into a locking position with the coupler. A crank (176) is used to retract the shaft into a locking position.