Joseph G Colombo

US Patent:

6348784, Feb 19, 2002

Filed:

Feb 13, 2001

Appl. No.:

09/782243

Inventors:

Igor Y. Gofman - Croton-on-Hudson NY
Joseph G. Colombo - Lodi NJ

Assignee:

Coltene/Whaledent Inc. - Manwah NJ

International Classification:

G05F 140

US Classification:

323289

Abstract:

In a switching voltage power supply, a series regulator circuit interconnects an input voltage section with an output voltage section of the switching power supply. The regulator circuit has an n-channel MOSFET transistor serving as a regulator element. A gating circuit applies a gating voltage to the gate terminal relative to the drain terminal for establishing states of current conduction and current cut-off in the transistor. A biasing circuit interconnects the gating circuit with the drain terminal for establishing an offset potential of the gate terminal relative to the drain terminal during the state of current conduction, the offset potential counteracting a gate-to-source threshold voltage for reduction of a voltage drop between the drain terminal and the source terminal with a corresponding reduction in power dissipation of the regulator element.

US Patent:

6442339, Aug 27, 2002

Filed:

May 4, 2001

Appl. No.:

09/848969

Inventors:

Igor Y. Gofman - Croton-on-Hudson NY
Joseph G. Colombo - Lodi NJ

Assignee:

Coltene/Whaledent, Inc. - Mahwah NJ

International Classification:

H05B 3702

US Classification:

392407, 315309

Abstract:

A method and apparatus for curing dental material with radiation from a halogen lamp provides for a shifting of a spectrum of the radiation to a shorter wavelength for increased rate of curing by adjusting current flow within a heating element of the lamp. The current is applied over an interval of time for accomplishing the curing. Feedback and feedforward circuitry, operative with a control signal of a regulated power source to reduce voltage applied by the power source to the heating element during an initial portion of the interval of time, prior to obtaining an operating temperature of the heating element, to maintain an upper bound on the magnitude of the current applied to the heating element, thereby to the vivid unnecessary and operations of the heating element for increased operating lifetime of the lamp.

US Patent:

6900673, May 31, 2005

Filed:

Jun 4, 2002

Appl. No.:

10/161773

Inventors:

Joseph G. Colombo - Lodi NJ, US
Igor Y. Gofman - Croton-on-Hudson NY, US

Assignee:

Coltene/Whaledent, Inc. - Cuyahoga Falls OH

International Classification:

H03B019/00

US Classification:

327114, 377 31

Abstract:

A micro-controller adjustably provides a scanning frequency for operating a driver for an ultrasonic device. The frequency is adjusted within a defined range until an acknowledgement signal is provided to the micro-controller to lock a currently selected frequency as the operating frequency. An indicator indicates when a frequency has been selected outside of the defined range. The device is preferably implemented as a complex programmable logic device (CPLD).

US Patent:

7029277, Apr 18, 2006

Filed:

Oct 17, 2002

Appl. No.:

10/273394

Inventors:

Igor Y. Gofman - Croton-on-Hudson NY, US
Joseph G. Colombo - Hackensack NJ, US

Assignee:

Coltene / Whaledent Inc. - Cuyahoga Falls OH

International Classification:

A61C 1/00

US Classification:

433 29

Abstract:

A light for a curing instrument includes a plurality of light sources, each producing an incident light beam. The incident light beams are combined to produce a single output beam, which exhibits a broader spectral width than any of the incident light beams. In one embodiment of the invention, the output beam exhibits an intensity over a spectral range defined by a first characteristic wavelength of a first of the plurality of light sources and a second characteristic wavelength of a second of the plurality of lights sources such that the intensity varies by no more than 25 percent over the range. In another embodiment of the invention including a one or more blue LED light sources among the plurality of light sources, at least one white LED is included in the plurality of light sources in order to generate an output light beam having a component portion that is characterized as green. In a third embodiment of the invention, a plurality of fiber optic bundles receive the incident light beams, and are arranged at a transmitting end so that individual fibers from the plurality of bundles are randomly combined to form a single output surface for transmitting the output beam.

US Patent:

7167829, Jan 23, 2007

Filed:

Oct 17, 2002

Appl. No.:

10/273395

Inventors:

Igor Y Gofman - Croton-on-Hudson NY, US
Joseph G. Colombo - Hackensack NJ, US

Assignee:

Coltene / Whaledent Inc. - Cuyahoga Falls OH

International Classification:

G10L 13/02

US Classification:

704274

Abstract:

A curing lamp apparatus is used for providing electronic voice information to report a number of operating conditions associated with the curing lamp. The apparatus includes a light sensor for sensing output power, voltage and current sensors for sensing input power, a microcontroller for providing a digital number in response to receiving signals from one or more sensors, a programmed voice circuit for retrieving a voice message signal from a memory, address associated with the digital number, and a transducer for receiving and audibly reproducing the voice message signal.

US Patent:

D597191, Jul 28, 2009

Filed:

Jul 3, 2008

Appl. No.:

29/320784

Inventors:

Joseph G. Colombo - Hackensack NJ, US
Anthony J. Leardi - Monroe NY, US
John E. Lando - Wayne NJ, US

Assignee:

Takasago International Corporation - Tokyo

International Classification:

2899

US Classification:

D23366

US Patent:

D608879, Jan 26, 2010

Filed:

Apr 3, 2009

Appl. No.:

29/334914

Inventors:

Joseph G. Colombo - Hackensack NJ, US
Anthony J. Leardi - Monroe NY, US
John E. Lando - Wayne NJ, US

Assignee:

Takasago International Corporation - Tokyo

International Classification:

2899

US Classification:

D23366

US Patent:

20030222535, Dec 4, 2003

Filed:

Jun 4, 2002

Appl. No.:

10/161790

Inventors:

Igory Gofman - Croton-on-Hudson NY, US
Joseph Colombo - Mahwah NJ, US

International Classification:

H02N002/06

US Classification:

310/316010

Abstract:

An ultrasonic driver determines an optimal operating frequency for an ultrasonic transducer, and drives the transducer at its optimal frequency. A microcontroller controlling a MOSFET driver selectively alters the operating frequency of the transducer until a maximum operating current is detected by a transducer performance detector. The transducer performance detector provides an acknowledgment signal to the microcontroller upon detecting the maximum operating current, causing the microcontroller to lock the operating frequency at the current, optimal value.