Jared Paul Coffeen

US Patent:

6547432, Apr 15, 2003

Filed:

Oct 17, 2001

Appl. No.:

09/981552

Inventors:

Jared P. Coffeen - Portage MI
Richard F. Huyser - Kalamazoo MI
Christopher M. Tague - Portage MI
Weston Pernsteiner - Houghton MI
Dennis A. Stratton - Plainwell MI

Assignee:

Stryker Instruments - Kalamazoo MI

International Classification:

B01F 1502

US Classification:

366130, 366139, 366189, 366195, 366225, 366332, 366222, 366386

Abstract:

A bone cement mixing and delivery assembly is disclosed for mixing a powdered copolymer and a liquid monomer to form a bone cement and delivering the bone cement. The assembly includes a cartridge having a distal end and a proximal end and defining a mixing chamber between the distal end and the proximal end. A transfer mechanism having a cap and a stem supporting a piston and a plunger is connected to the distal end. The transfer mechanism includes a first advancement mechanism for advancing the piston and plunger in unison and a second advancement mechanism for moving the plunger independent of the piston. The assembly further includes a removable handle having a shaft for attachment of a mixing blade and a quick-release connector and a release button for locking and unlocking the mixing blade from the removable handle.

US Patent:

6736537, May 18, 2004

Filed:

Aug 27, 2002

Appl. No.:

10/229349

Inventors:

Jared P. Coffeen - Portage MI
Richard F. Huyser - Kalamazoo MI
Christopher M. Tague - Portage MI
Weston Pernsteiner - Houghton MI
Dennis A. Stratton - Plainwell MI

Assignee:

Stryker Instruments - Kalamazoo MI

International Classification:

B01F 1502

US Classification:

366130, 366139, 366189, 366195, 366225, 366332, 366222, 366386

Abstract:

A bone cement mixing and delivery assembly is disclosed for mixing a powdered copolymer and a liquid monomer to form a bone cement and delivering the bone cement. The assembly includes a cartridge having a distal end and a proximal end and defining a mixing chamber between the distal end and the proximal end. A transfer mechanism having a cap and a stem supporting a piston and a plunger is connected to the distal end. The transfer mechanism includes a first advancement mechanism for advancing the piston and plunger in unison and a second advancement mechanism for moving the plunger independent of the piston. The assembly further includes a removable handle having a shaft for attachment of a mixing blade and a quick-release connector and a release button for locking and unlocking the mixing blade from the removable handle.

US Patent:

6994465, Feb 7, 2006

Filed:

Mar 13, 2003

Appl. No.:

10/388015

Inventors:

Christopher Matthew Tague - Portage MI, US
Richard F. Huyser - Kalamazoo MI, US
Jared Paul Coffeen - Paw Paw MI, US
Christopher Scott Brockman - Kalamazoo MI, US

Assignee:

Stryker Instruments - Kalamazoo MI

International Classification:

B01F 7/20
B01F 13/06

US Classification:

366139, 366245, 366298, 366299, 366300

Abstract:

A mixing assembly for mixing bone cement includes a housing, a lid, a handle, and two mixing paddles, a first and a second mixing paddle. The lid is removably attachable to the housing. The handle has a portion that extends through the lid and that is rotatable in a first rotational direction. The first mixing paddle is operatively coupled to the portion of the handle. As a result, the first mixing paddle rotates with the portion of the handle in the first rotational direction. The second mixing paddle is operatively coupled to the first mixing paddle for rotating opposite the portion. As such, when the portion of the handle and the first mixing paddle rotate in the first rotational direction, the second mixing paddle rotates in a second rotational direction that is opposite the first rotational direction.

US Patent:

7134782, Nov 14, 2006

Filed:

Mar 16, 2004

Appl. No.:

10/801748

Inventors:

Jared P. Coffeen - Portage MI, US
Richard F. Huyser - Kalamazoo MI, US
Christopher M. Tague - Portage MI, US
Weston Pernsteiner - Houghton MI, US
Dennis A. Stratton - Plainwell MI, US

Assignee:

Stryker Instruments - Kalamazoo MI

International Classification:

B01F 7/00

US Classification:

366242

Abstract:

A bone cement mixing and delivery assembly is disclosed for mixing a powdered copolymer and a liquid monomer to form a bone cement and delivering the bone cement. The assembly includes a cartridge having a distal end and a proximal end and defining a mixing chamber between the distal end and the proximal end. A transfer mechanism having a cap and a stem supporting a piston and a plunger is connected to the distal end. The transfer mechanism includes a first advancement mechanism for advancing the piston and plunger in unison and a second advancement mechanism for moving the plunger independent of the piston. The assembly further includes a removable handle having a shaft for attachment of a mixing blade and a quick-release connector and a release button for locking and unlocking the mixing blade from the removable handle.

US Patent:

7306361, Dec 11, 2007

Filed:

Feb 8, 2006

Appl. No.:

11/349621

Inventors:

Jared P Coffeen - Portage MI, US
Richard F Huyser - Kalamazoo MI, US
Christopher M Tague - Portage MI, US
Weston Pernsteiner - Houghton MI, US
Dennis A. Stratton - Plainwell MI, US

Assignee:

Stryker Corporation - Kalamazoo MI

International Classification:

B01F 15/02
B01F 13/06

US Classification:

366189, 366139, 366195, 366255, 366332

Abstract:

A bone cement mixing and delivery assembly is disclosed for mixing a powdered copolymer and a liquid monomer to form a bone cement and delivering the bone cement. The assembly includes a cartridge having a distal end and a proximal end and defining a mixing chamber between the distal end and the proximal end. A transfer mechanism having a cap and a stem supporting a piston and a plunger is connected to the distal end. The transfer mechanism includes a first advancement mechanism for advancing the piston and plunger in unison and a second advancement mechanism for moving the plunger independent of the piston. The assembly further includes a removable handle having a shaft for attachment of a mixing blade and a quick-release connector and a release button for locking and unlocking the mixing blade from the removable handle.

US Patent:

7320540, Jan 22, 2008

Filed:

Mar 27, 2006

Appl. No.:

11/277582

Inventors:

Jared P. Coffeen - Portage MI, US

Assignee:

Stryker Corporation - Kalamazoo MI

International Classification:

B01F 13/00
B01F 11/00
B01F 15/00
B01F 13/06

US Classification:

366130, 366195

Abstract:

A bone cement mixing and delivery assembly is disclosed for mixing a powdered copolymer and a liquid monomer to form a bone cement and deliver the bone cement. The assembly includes a cartridge having a distal end and a proximal end and defining a mixing chamber between the distal end and the proximal end. A transfer mechanism having a cap and a stem supporting a piston and a plunger is connected to the distal end. The transfer mechanism includes a first advancement mechanism for advancing the piston and plunger in unison and a second advancement mechanism for moving the plunger independent of the piston. The assembly further includes a removable handle and a mixing blade releasably coupled to the handle to mix the components of the bone cement. A quick-release connector and a release device are used to lock and unlock the mixing blade from the removable handle.

US Patent:

7393342, Jul 1, 2008

Filed:

Aug 13, 2007

Appl. No.:

11/837649

Inventors:

Bruce D. Henniges - Galesburg MI, US
Jared P. Coffeen - Paw Paw MI, US

Assignee:

Stryker Corporation - Kalamazoo MI

International Classification:

A61M 5/00
G01F 11/32
B01F 15/02

US Classification:

604187, 366189, 222327

Abstract:

A bone cement mixing and delivery system is provided. The system includes a mixing cartridge for receiving liquid and powder components of bone cement, a mixing device for mixing the components, and a delivery gun for discharging the bone cement from the mixing cartridge. The mixing cartridge comprises a cylinder having proximal and distal ends with a cylinder wall extending between the ends. A piston is locked at the distal end by a locking member that includes a pair of locking tabs protruding into slots in the cylinder wall. With the piston in the locked position, the mixing device, e. g. , a mixing shaft and blade, mixes the components. After mixing, the cartridge is placed in the delivery gun and release buttons on the locking member are engaged by a release mechanism on the delivery gun to release the piston from the locked position.

US Patent:

7645066, Jan 12, 2010

Filed:

Dec 12, 2005

Appl. No.:

11/301177

Inventors:

Christopher Matthew Tague - Portage MI, US
Richard F. Huyser - Kalamazoo MI, US
Jared Paul Coffeen - Paw Paw MI, US
Christopher Scott Brockman - Kalamazoo MI, US

Assignee:

Stryker Corporation - Kalamazoo MI

International Classification:

B01F 7/20
B01F 13/06

US Classification:

366245, 366139

Abstract:

A mixing assembly for mixing bone cement includes a housing, a lid, a handle, and two mixing paddles, a first and a second mixing paddle. The lid is removably attachable to the housing. The handle has a portion that extends through the lid and that is rotatable in a first rotational direction. The first mixing paddle is operatively coupled to the portion of the handle. As a result, the first mixing paddle rotates with the portion of the handle in the first rotational direction. The second mixing paddle is operatively coupled to the first mixing paddle for rotating opposite the portion. As such, when the portion of the handle and the first mixing paddle rotate in the first rotational direction, the second mixing paddle rotates in a second rotational direction that is opposite the first rotational direction.