Donald E Walker

US Patent:

7077567, Jul 18, 2006

Filed:

Apr 11, 2005

Appl. No.:

11/103053

Inventors:

Roberto Molteni - Arlington Heights IL, US
Donald Walker - Mundelein IL, US

Assignee:

Gendex Corporation - Washington DC

International Classification:

H05G 1/02

US Classification:

378193

Abstract:

A container to secure an x-ray source is provided. The container includes a base and a cover each having an inside surface. The base and cover are assembled together forming a fluid tight chamber defined by the inside surfaces of the base and cover to secure x-ray source components to positions along the inside surface of the base. A plurality of these positions are machinable to provide a precision arrangement of at least a portion of the x-ray source components and at least one fluid tight seal between x-ray source components and the base. During fabrication of the base, each position of the inside surface required to provide a precise arrangement of at least a portion of the x-ray source components and at least one fluid tight seal between the x-ray source components and the base being accessible from exterior of the base by a substantially straight tool.

US Patent:

7469032, Dec 23, 2008

Filed:

Apr 11, 2005

Appl. No.:

11/103034

Inventors:

Donald Walker - Mundelein IL, US
David Pettinato - Schaumburg IL, US

Assignee:

Gendex Corporation - Washington DC

International Classification:

A61B 6/14
H05G 1/02

US Classification:

378 38, 378195, 378198

Abstract:

Numerous structural/patient positioning features are provided for use with a dental x-ray machine. At least the following features are included: an inverted motor arrangement to actuate an outer support column with respect to an inner support column; wiper elements disposed between the inner and outer support columns to provide enhanced electrical grounding therebetween; adjustable roller subassemblies disposed between the inner and outer columns; a flexible electrical cable disposed inside the inner column; a self-aligning base for use with the inner column, the base having symmetric halves; an adaptable handgrip handrail extending from the outer column at compound oblique angles; a drive system for film transport; and a side projection system for patient head positioning, including multiple horizontal light beams.

US Patent:

7780201, Aug 24, 2010

Filed:

Oct 13, 2006

Appl. No.:

11/581210

Inventors:

Mark A. Luzbetak - Kildeer IL, US
Donald C. Walker - Mundelein IL, US

Assignee:

Medela Holding AG - Baar

International Classification:

F16L 39/00

US Classification:

285321

Abstract:

A connector for connecting a tube within a receptacle. A latching component fits within the receptacle, and receives a plug member to which the tube is connected. One end of receptacle is adapted, for instance, to be attached to a tube on a motor drive unit of a breast pump assembly, or formed integrally therewith. The opposite end of receptacle receives components of the connector therein. The plug member is inserted into the latching component and has means thereon that engage corresponding means on the latching component such that the plug member is releasably secured within the latching component in a rotatable manner.

US Patent:

8251583, Aug 28, 2012

Filed:

Dec 15, 2009

Appl. No.:

12/638611

Inventors:

Lyubomir L. Cekov - Rolling Meadows IL, US
Arkady Kantor - Buffalo Grove IL, US
Donald Walker - Mundelein IL, US
Alan P. Krema - Naperville IL, US

Assignee:

Midmark Corporation - Versailles OH

International Classification:

A61B 6/14
H05G 1/64
H05G 1/02
H05G 1/08

US Classification:

378191, 378 38, 378 988

Abstract:

A removable radiation sensor for connecting to a panoramic dental radiation imaging system. The sensor includes a radiation sensor unit mounted in a housing. Connector bearings are positioned within the housing so as to engage with a pair of connector pins provided as part of the upright support of the imaging system. A lock pin within the housing is selectively slidable between Locked and Unlocked, and biased toward Locked. The lock includes a locking pin with a groove, and when the groove is aligned with the respective connector pin, the lock is unlocked, and that connector pin is slidable axially within the bearings. When the groove is not aligned with the connector pin, the lock is locked, the locking pin engaging with a groove formed for that purpose in the connector pin. The sensor has a field-replaceable electrical connector, to reduce maintenance cost.

US Patent:

8509381, Aug 13, 2013

Filed:

Dec 15, 2009

Appl. No.:

12/638600

Inventors:

Donald Walker - Mundelein IL, US
Arkady Kantor - Buffalo Grove IL, US
Lyubomir L Cekov - Rolling Meadows IL, US
Alan P. Krema - Naperville IL, US

Assignee:

Midmark Corporation - Versailles OH

International Classification:

A61B 6/14
A61B 6/08

US Classification:

378 39, 378196, 378206

Abstract:

A patient positioning system for a panoramic dental radiation imaging system, including an upright support, and a patient positioning arm with chin rest mounted thereto. Wands are each rotatably connected to the patient positioning arm and connected together so as to move at identical angles of rotation, but in the opposite direction. Lasers, including a mid-sagittal, a Frankfort Plane, two cuspid, and one toe laser, each providing a line of visible laser light directed at a respective area of a patient's face, or at the floor, assist a technician in properly positioning the patient. A mirror is mounted to the upright support by a mechanism that permits the mirror to be pivoted outward from the support, in either of two directions, so as to enable the technician to see the lasers on the patient's face from the technician's position on either side of the positioning arm.

US Patent:

8515007, Aug 20, 2013

Filed:

Dec 15, 2009

Appl. No.:

12/638624

Inventors:

Arkady Kantor - Buffalo Grove IL, US
Donald Walker - Mundelein IL, US
Lyubomir L. Cekov - Rolling Meadows IL, US
Alan P. Krema - Naperville IL, US

Assignee:

Midmark Corporation - Versailles OH

International Classification:

A61B 6/14

US Classification:

378 39

Abstract:

A motion system for use in a panoramic dental radiation imaging system, including apparatus for rotating an overhead arm with respect to a support column, apparatus for rotating a C-arm with respect to the overhead arm, and apparatus for moving the C-arm axially with respect to the overhead arm. The overhead arm is rotatably mounted to the support column at a rotation point. The apparatus for rotating the overhead arm is a linear actuator, one end of which is connected to the support column at a first point spaced apart from the rotation point, while the other end is connected to the overhead arm at a second point spaced apart from the rotation point and from the first point. The C-arm rotating apparatus includes a C-arm rotation motor driving a wheel, which is engaged with the C-arm in such a way that the rotation of the wheel causes rotation of the C-arm.

US Patent:

20060227939, Oct 12, 2006

Filed:

Apr 11, 2005

Appl. No.:

11/103026

Inventors:

Donald Walker - Mundelein IL, US
David Pettinato - Schaumburg IL, US

Assignee:

GENDEX CORPORATION - Washington DC

International Classification:

H05G 1/00
A61B 6/14

US Classification:

378208000, 378038000

Abstract:

A bite piece is provided for use with a dental x-ray system. A substantially straight first portion extends to a curved second portion. An end of the second portion opposite the first portion has a region of reduced cross section adjacent the end of the second portion. The region is received between a patient's opposed upper and lower anterior teeth to secure the patient's head position during operation of the dental x-ray system. The region and the second portion substantially lack transitional edges, improving each of the quality of a radiograph produced during operation of the dental x-ray system, a patient's level of comfort and stability of the patient's head position.

US Patent:

57880999, Aug 4, 1998

Filed:

Jun 5, 1996

Appl. No.:

8/660694

Inventors:

Dennis M. Treu - Gurnee IL
Dilip H. Shah - Grayslake IL
Donald C. Walker - Mundelein IL
Kenneth E. Pawlak - Vernon Hills IL

Assignee:

AKYSYS, Ltd. - Lincolnshire IL

International Classification:

B65D 3900

US Classification:

215230

Abstract:

A vessel for containing a batch quantity of chemicals for preparation of physiologic, therapeutic, or irrigation solutions, such as dialysate. The vessel has a cap and a bottle shell having features that make the vessel suitable for mounting to an apparatus for automatically opening the vessel. In a preferred embodiment, the cap has a frangible membrane sealing the vessel. A protective overcap is removable mounted to the cap to protect the cap from puncture prior to installation on the opening apparatus.