Dirrick J Ferrell

US Patent:

6364028, Apr 2, 2002

Filed:

Nov 22, 2000

Appl. No.:

09/718762

Inventors:

Dirrick J. Ferrell - Kentwood MI
Ross C. Stoepker - Kentwood MI
Timothy E. Steenwyk - Grand Rapids MI
Eric Jon Walstra - Grand Rapids MI

Assignee:

Laser Alignment, Inc. - Grand Rapids MI

International Classification:

A01B 4106

US Classification:

172 1, 172 45, 172781, 172 2, 701 50

Abstract:

A control system for establishing grade and elevation control for a tool of a construction apparatus for maintaining the vertical position of the tool relative to a reference includes a first ultrasonic transducer configured to be carried by the construction apparatus, with the first transducer transmitting and receiving acoustic waves, at least one reflector, a second ultrasonic transducer configured to be carried by the construction apparatus, with the second transducer receiving acoustic waves, and a controller coupled to the first and second ultrasonic transducers which drive the transducers to produce an acoustic wave and monitors the time reflections of the acoustic wave are respectively received by the first and second transducers. The controller determines the local speed of sound based on a first in time reflection received by the second ultrasonic transducer and determines the distance from the construction tool to a reference based on the local speed of sound and a second in time reflection received by both the first and second ultrasonic transducers. The controller produces at least one electrical signal as a function of the distance of the ultrasonic transducers from the reference.

US Patent:

61522384, Nov 28, 2000

Filed:

Sep 23, 1998

Appl. No.:

9/159255

Inventors:

Dirrick J. Ferrell - Kentwood MI
Ross C. Stoepker - Kentwood MI
Timothy E. Steenwyk - Grand Rapids MI
Eric Jon Walstra - Grand Rapids MI

Assignee:

Laser Alignment, Inc. - Grand Rapids MI

International Classification:

A01D 7528

US Classification:

172 2

Abstract:

A control system for establishing grade and elevation control for a tool of a construction apparatus for maintaining the vertical position of the tool relative to a reference includes a first ultrasonic transducer configured to be carried by the construction apparatus, with the first transducer transmitting and receiving acoustic waves, at least one reflector, a second ultrasonic transducer configured to be carried by the construction apparatus, with the second transducer receiving acoustic waves, and a controller coupled to the first and second ultrasonic transducers which drive the transducers to produce an acoustic wave and monitors the time reflections of the acoustic wave are respectively received by the first and second transducers. The controller determines the local speed of sound based on a first in time reflection received by the second ultrasonic transducer and determines the distance from the construction tool to a reference based on the local speed of sound and a second in time reflection received by both the first and second ultrasonic transducers. The controller produces at least one electrical signal as a function of the distance of the ultrasonic transducers from the reference.

US Patent:

20210147044, May 20, 2021

Filed:

Oct 29, 2020

Appl. No.:

17/084005

Inventors:

- Hudsonville MI, US
Michael V. Camarota - Hudsonville MI, US
Dirrick Ferrell - Hudsonville MI, US

Assignee:

ITC Incorporated - Hudsonville MI

International Classification:

B63B 45/04
H05B 45/20
H05B 47/115

Abstract:

A light control system configured to lock-out the predetermined color spectrums corresponding to red, green, white and blue (or other jurisdictionally restricted colors). In some embodiments, when a specific trigger is detected, then the predetermined color spectrum is prohibited from being displayed (i.e. locked-out). If a trigger is detected, the user is only permitted to display colors outside of the predetermined locked-out color spectrum so as to prevent confusion by third party vessels.

US Patent:

20190313496, Oct 10, 2019

Filed:

Apr 8, 2019

Appl. No.:

16/377602

Inventors:

- Hudsonville MI, US
Dirrick Ferrell - Hudsonville MI, US

Assignee:

ITC Incorporated - Hudsonville MI

International Classification:

H05B 33/08

Abstract:

An LED light temperature control system includes a dimmer switch comprising a single power input, an output signal, and an control device configured to vary the duty cycle of the output signal. The LED light temperature control system further includes a light controller configured to receive the output signal from the dimmer switch. The light controller has a first light output signal configured to power a first group of LEDs and a second light output signal configured to power a second group of LEDs. The light controller is configured to vary the duty cycle of the first light output signal proportionate to the duty cycle of the dimmer switch output signal. The light controller is further configured to vary the duty cycle of the second light output signal inversely to the duty cycle of the dimmer switch output signal.