ROBERT KELLER, P.A.-C
Physician Assistant at Park St, Urbana, IL

2008018, Jul 31, 2008

Feb 29, 2008

12/040574

Eric M. Gregori - Lindenhurst IL, US
James J. Fitzgibbon - Batavia IL, US
Carlos Jurado - Aurora IL, US
Robert R. Keller - Chicago IL, US
Matthew C. Stephan - Glen Ellyn IL, US
Colin Willmott - Buffalo Grove IL, US

THE CHAMBERLAIN GROUP, INC. - Elmhurst IL

H02P 3/00

318434, 318471

A movable barrier operator having a motor controller () and motor () that control selective movement of a movable barrier () also has an obstacle detector () that utilizes an automatically determined excess force threshold value to permit reliable detection of an obstacle under a wide variety of operational circumstances, including changing physical circumstances, aging components, temperature variations, and motor runtime. In a preferred embodiment, a characteristic force value for the system is frequently updated as a function of actual measured force requirements (and further compensated, pursuant to various embodiments, with respect to other conditions such as temperature and motor runtime). This characteristic force value is then utilized to determine the excess force threshold value.

2005023, Oct 27, 2005

Apr 27, 2004

10/832807

James Fitzgibbon - Batavia IL, US
Robert Keller - Chicago IL, US
Colin Willmott - Buffalo Grove IL, US
William Gioia - Winfield IL, US
Richard Hill - McHenry IL, US
David Schuda - Wheaton IL, US
Davide Alborghetti - Lombardo, IT

H02P003/00, H02P001/00

318280000, 318466000

Multiple zones () are established with respect to the travel of a movable barrier over a course of permitted movement (typically between a fully open and a fully closed position). By detecting and knowing the juxtaposition of the movable barrier with a given one of these zones, a particular direction of movement for that movable barrier can be automatically selected notwithstanding possible ignorance regarding the exact position of the movable barrier due to, for example, one or more triggering conditions (such as momentary disconnection of the movable barrier with respect to its motive mechanism). Such zones are particularly efficacious when employed in conjunction with passpoint-based position determination movable barrier operator systems.

2005004, Feb 24, 2005

Aug 21, 2003

10/645325

James Fitzgibbon - Batavia IL, US
Robert Keller - Chicago IL, US
Bernard Wojiak - Naperville IL, US

H04B001/034

455100000

A wireless transmit-only apparatus () can be comprised of a controller () that selectively controls which of a plurality of resonant devices (and ) are utilized to influence the transmission carrier frequency of a transmitter (). In a preferred embodiment at least one of the resonant devices comprises a mechanically resonant device () such as a surface acoustic wave device, a crystal resonator, or a ceramic resonator. In a preferred embodiment, a user interface () includes a plurality of independently assertable inputs. The controller responds to assertion of one of this inputs by selecting a particular set of characterizing transmission parameters (as are stored, for example, in a memory () and using those characterizing transmission parameters to transmit a message using a transmission carrier frequency as corresponds to use of a co-selected resonant device.

7432676, Oct 7, 2008

Nov 30, 2006

11/565344

Robert Keller - Chicago IL, US
Colin Willmott - Buffalo Grove IL, US

The Chamberlain Group, Inc. - Elmhurst IL

H02P 1/00

318266, 318268, 318286, 318466, 318468

A barrier movement operator includes an A. C. motor having a rotatable rotor connected to a barrier for movement thereof. A sensing apparatus generates motor signals representing an operational variable of the motor. The movement of the barrier is controlled by a controller, which responds to the motor signals by selectively stopping rotation of the rotor or reversing the rotation of the rotor. A power control arrangement provides energizing power to the motor by receiving AC power input substantially in the form of a sine wave and conducts portions of successive cycles of the sine wave of the received AC power to the motor to enhance the sensed operational variable to torque characteristic of the motor.

2005004, Feb 24, 2005

Aug 21, 2003

10/645318

James Fitzgibbon - Batavia IL, US
Robert Keller - Chicago IL, US
Bernard Wojiak - Naperville IL, US

H04B007/24, H04B001/02, H04B001/034

455095000, 455091000

A wireless transmit-only apparatus () has a controller () that responds to a user interface by correlating specific user input with a corresponding characterizing transmission parameter(s) as is stored in a memory () and by selecting a corresponding resonant device (and ). The latter devices serve to drive the PLL control input of a phase locked loop () to thereby influence the transmission carrier frequency of a wireless transmitter (). In a preferred embodiment, at least one of the resonant devices comprises a mechanically resonant device such as a surface acoustic wave device, a crystal resonator, or a ceramic resonator.

7042183, May 9, 2006

Jul 18, 2003

10/622214

James J. Fitzgibbon - Batavia IL, US
Robert Keller - Chicago IL, US
Edward Laird - Lombard IL, US

The Chamberlain Group, Inc. - Elmhurst IL

H02P 1/00

318445, 318466, 318468, 318280, 318432, 49 26, 49 28

Methods and apparatus for controlling the speed of an A. C. induction motor are disclosed and shown in operation for controlling the movement of a barrier. Included are voltage configuration circuits which selectively gate portions of the half-cycles of AC mains voltage to the induction motor. When the motor is started increasing amounts of mains AC voltage is applied to the motor and decreasing portions of the mains AC are applied to the motor during a stopping routine. The motor can also be energized with less than full mains AC to permit differences in barrier movement speed dependent on operating parameters.