David K Christensen

US Patent:

20120152577, Jun 21, 2012

Filed:

Dec 17, 2011

Appl. No.:

13/329249

Inventors:

Christopher Mattson - Provo UT, US
Jake Allred - Provo UT, US
Jeremy Alsup - Provo UT, US
Travis Anderson - Provo UT, US
David Christensen - Provo UT, US
Jacob Morrise - , US
Jon Ward - Lake Jackson TX, US

International Classification:

B25D 11/06
B25D 17/08
B25D 15/00
B25D 17/02

US Classification:

173 1, 173 90, 81 28, 81436

Abstract:

A hand tool impacting device may include, a drive shaft with an aperture, an impaler disk, and a floating pin positioned within the aperture of the drive shaft. A set of circular ramps on the outer edge of the impaler disk may interact with a stationary pin insert to translate the drive shaft and create an impacting motion. A pair of springs placed against either side of the floating pin may allow a specialized tool bit to engage or disengage the impaler disk, thereby allowing selective use of translational impacting motion, or rotational torque. An impact bit for engaging the impaler disk may include, a tool head configured to engage a work piece and a tool shaft configured to be inserted into a hollow drive shaft to engage a floating pin. According to one embodiment, the impact bit includes a number of sleeves to guide the tool head during operation.

US Patent:

20160288877, Oct 6, 2016

Filed:

Apr 1, 2016

Appl. No.:

15/089178

Inventors:

- OGDEN UT, US
David CHRISTENSEN - Colorado Springs CO, US

International Classification:

B62M 9/122

Abstract:

An electronic derailleur control system for a bicycle has controller operatively connected to a derailleur of the bicycle and to at least one sensor of the bicycle, and a memory on which instructions are stored that are executable by the controller to control shifts of the derailleur. The system is receives feedback data from the sensor on a performance parameter of the bicycle, and analyzes the feedback data to evaluate performance conditions. The controller calculates adjustments to the derailleur shifts based on the performance conditions, with automatic iteration to repeatedly accept feedback and optimize the shift distance based on the feedback. The system can be activated by rider command or by satisfaction of pre-set performance conditions stored in the memory. A derailleur and a method for controlling shifts on this basis also are disclosed.

US Patent:

20150375376, Dec 31, 2015

Filed:

Jul 7, 2015

Appl. No.:

14/793368

Inventors:

- Provo UT, US
Jake ALLRED - Provo UT, US
Jeremy ALSUP - Provo UT, US
Travis ANDERSON - Provo UT, US
David CHRISTENSEN - Provo UT, US
Jacob MORRISE - Provo UT, US
Jon WARD - Lake Jackson TX, US

International Classification:

B25B 21/02
B25D 16/00
B25D 17/08
B25D 17/02
B25D 11/10

Abstract:

A hand tool impacting device may include, a drive shaft with an aperture, an impaler disk, and a floating pin positioned within the aperture of the drive shaft. A set of circular ramps on the outer edge of the impaler disk may interact with a stationary pin insert to translate the drive shaft and create an impacting motion. A pair of springs placed against either side of the floating pin may allow a specialized tool bit to engage or disengage the impaler disk, thereby allowing selective use of translational impacting motion, or rotational torque. An impact bit for engaging the impaler disk may include, a tool head configured to engage a work piece and a tool shaft configured to be inserted into a hollow drive shaft to engage a floating pin. According to one embodiment, the impact bit includes a number of sleeves to guide the tool head during operation.