Alan P Krema from 2611 Lake Shore Dr, Michigan City, IN 46360, age 69

X-Ray Tube Preheat Control
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US Patent:

7016468, Mar 21, 2006
Filed:

Mar 12, 2003
Appl. No.:

10/386820
Inventors:

Alan P. Krema - Naperville IL, US
Assignee:

Progeny, Inc. - Buffalo Grove IL
International Classification:

H05G 1/32
H05G 1/34
US Classification:

378112, 378101, 378107, 378111, 378114
Abstract:

A current feedback circuit in a dental imaging apparatus, which measures the x-ray tube current produced by the x-ray filament. During preheat, when the tube current is sensed to be appropriate for production of a constant rate of electrons, preheat is stopped, and diagnostic radiation emission begins. This circuit eliminates a fixed amount of preheat pulses which contribute unusable radiation during preheat of the filament in prior art systems.

Removable Radiation Sensor For Dental Imaging Systems
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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.

Patient Positioning System For Panoramic Dental Radiation Imaging System
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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.

Motion System For Panoramic Dental Radiation Imaging System
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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.

Integrated Digital Dental X-Ray System
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US Patent:

7006600, Feb 28, 2006
Filed:

Jan 15, 2004
Appl. No.:

10/758682
Inventors:

Alan P. Krema - Naperville IL, US
George Stantchev - Phoenix AZ, US
Lyubomir Cekov - Schamburg IL, US
Mark Greenwood - Deer Park IL, US
Assignee:

Progeny, Inc. - Buffalo Grove IL
International Classification:

H05G 1/64
US Classification:

378 987
Abstract:

An integrated digital x-ray diagnostic system and a method for conducting dental radiography which includes optimizing exposure settings based on certain physical parameters of a patient, communicating the operational status of the x-ray generator and the exposure settings directly to the a CCD sensor without radiation sensitive detector elements, and supplying various viewing stations with image data thereby improving dental office workflow. The activation of the sensor and the x-ray source are coordinated so as to avoid pre-integration of charge in the image sensor, and at the same time reduce risk of over-exposure to the patient.