John Douglas Willems, JR
Engineers at Paseo Pavon, Tucson, AZ
License number
Colorado 38565
Issued Date
Jun 30, 2004
Renew Date
Nov 1, 2015
Expiration Date
Oct 31, 2017
Type
Professional Engineer
Address
Address
1400 E Paseo Pavon E Paseo Pavon, Tucson, AZ 85718
Professional information
Mechanical Engineer
Position:
Senior Mechanical Engineer at Raytheon
Location:
Tucson, Arizona Area
Industry:
Defense & Space
Work:
Raytheon
- Tucson, Arizona Area since Jul 2009
-
Senior Mechanical Engineer
Dynetics, Inc.
Apr 2008 - Jul 2009
-
Sr Mechanical Design/Stress Engineer
SUN Microsystems
Aug 2003 - Apr 2008
-
Mechanical Engineer
Quantum
Jun 2000 - Aug 2003
-
Mechanical Engineer
Imation
Jun 1997 - Jun 2000
-
Mechanical Engineer
Education:
Montana State University-Bozeman 1993 - 1997
BSME, Mechanical Engineering
BSME, Mechanical Engineering
Resettable Missile Control Fin Lock Assembly
US Patent:
2014002, Jan 23, 2014
Filed:
Jul 20, 2012
Appl. No.:
13/554032
Inventors:
John F. Bugge - Tucson AZ, US
John D. Willems - Tucson AZ, US
John D. Willems - Tucson AZ, US
Assignee:
RAYTHEON COMPANY - Waltham MA
International Classification:
F42B 10/00
US Classification:
244 324
Abstract:
A fin lock assembly for locking and unlocking missile fins includes a piston movable along a piston axis between a locked position for preventing a fin from rotating and an unlocked position for allowing the fin to rotate. The fin lock assembly includes a camshaft rotatable between a locked position and a relatively-rotated unlocked position about a cam axis that is transverse the piston axis. The camshaft has an eccentric portion connected to the piston such that rotation of the camshaft between the locked position and the unlocked position moves the piston between its corresponding locked and unlocked positions. The fin lock assembly includes a torsion spring connected to the camshaft to bias the camshaft toward its unlocked position. A latch mechanism holds a plurality of camshafts in their locked positions and simultaneously releases the camshafts to release their fins.
Fin Buzz System And Method For Assisting In Unlocking A Missile Fin Lock Mechanism
US Patent:
2014004, Feb 13, 2014
Filed:
Aug 9, 2012
Appl. No.:
13/570280
Inventors:
Thomas A. Black - Tucson AZ, US
David J. Reyes - Tucson AZ, US
Robert W. Von Mayr - Sahuarita AZ, US
Erik A. Fjerstad - Tucson AZ, US
John D. Willems - Tucson AZ, US
David J. Reyes - Tucson AZ, US
Robert W. Von Mayr - Sahuarita AZ, US
Erik A. Fjerstad - Tucson AZ, US
John D. Willems - Tucson AZ, US
Assignee:
RAYTHEON COMPANY - Waltham MA
International Classification:
F42B 10/64
US Classification:
244 324
Abstract:
By removing the aerodynamic fin forces from the fin lock mechanism, achieved by actuating the fin control system to apply a controlled force that counters the aerodynamic forces acting on the control fins, the system can reduce the transmission of aerodynamic forces onto the fin lock mechanism, which makes the fin lock mechanism easier to unlock with less force. Accordingly, a method for unlocking a fin lock mechanism that releasably holds one or more missile control fins in a locked position, where the control fins are prevented from rotating, includes the steps of (i) applying an alternating positive and negative rotational force to a control fin; (ii) monitoring the position of the control fin during the applying step; and (iii) while the position of the control fin does not exceed a predetermined value, repeating the applying step for a predetermined number of times or for a predetermined period.