John R Hendershot

US Patent:

7552681, Jun 30, 2009

Filed:

Jul 31, 2007

Appl. No.:

11/894628

Inventors:

Gerald Laib - Olney MD, US
David Olson - Chesapeake Beach MD, US
Daniel Jean - Odenton MD, US
John Hendershot - Dunkirk MD, US
Lawrence Fan - Vienna VA, US
Michael Beggans - Waldorf MD, US
Ezra Chen - Potomac MD, US

Assignee:

The United States of America as represented by the Secretary of the Navy - Washington DC

International Classification:

F42C 15/34

US Classification:

102254, 102233, 102249, 102251

Abstract:

A MEMS fuze having a moveable slider with a microdetonator at an end for positioning adjacent an initiator. A setback activated lock and a spin activated lock prevent movement of the slider until respective axial and centrifugal acceleration levels have been achieved. Once these acceleration levels are achieved, the slider is moved by a V-beam shaped actuator arrangement to position the microdetonator relative to a secondary lead to start an explosive train in a munitions round.

US Patent:

7808158, Oct 5, 2010

Filed:

Sep 27, 2007

Appl. No.:

11/973993

Inventors:

Michael Deeds - Port Tobacco MD, US
Veronica Valeriano - Alexandria VA, US
Gerald Laib - Olney MD, US
John Hendershot - Dunkirk MD, US
David Olson - Chesapeake Beach MD, US

Assignee:

The United States of America as represented by the Secretary of the Navy - Washington DC

International Classification:

H02N 2/18

US Classification:

310339, 310113, 310 75 C, 310102 R

Abstract:

An electrical generator includes a fluid-flow driven impeller including at least one impact arm; and at least one cantilevered beam disposed such that the impact arm strikes the cantilevered beam as the impeller rotates. The cantilevered beam at least partially includes a piezoelectric film.

US Patent:

7913623, Mar 29, 2011

Filed:

Apr 27, 2009

Appl. No.:

12/454037

Inventors:

Lawrence Fan - Vienna VA, US
Michael Beggans - Waldorf MD, US
Ezra Chen - Potomac MD, US
Gerald Laib - Olney MD, US
David Olson - Chesapeake Beach MD, US
Daniel Jean - Odenton MD, US
John Hendershot - Dunkirk MD, US

Assignee:

The United States of America as represented by the Secretary of the Navy - Washington DC

International Classification:

F42C 15/34

US Classification:

102254, 102233, 102246, 102251, 361247, 361248, 361249, 361250, 361251, 361252

Abstract:

A MEMS fuze having a moveable slider with a microdetonator at an end for positioning adjacent an initiator. A setback activated lock and a spin activated lock prevent movement of the slider until respective axial and centrifugal acceleration levels have been achieved. Once these acceleration levels are achieved, the slider is moved by a V-beam shaped actuator arrangement to position the microdetonator relative to a secondary lead to start an explosive train in a munitions round.

US Patent:

8522682, Sep 3, 2013

Filed:

Sep 23, 2010

Appl. No.:

12/924797

Inventors:

Kevin Genson - College Park MD, US
Daniel Jean - Odenton MD, US
John Hendershot - Dunkirk MD, US
Gerald Laib - Olney MD, US
David Olson - Chesapeake beach MD, US
Ezra Chen - Potomac MD, US
Veronica Badescu - Alexandria VA, US
Anthony Mansfield - Alexandria VA, US
Troy Caruso - Alexandria VA, US

Assignee:

The United States of America as Represented by the Secretary of the Navy - Washington DC

International Classification:

F42C 15/184
F42C 15/40
F42C 15/24
F42C 15/22

US Classification:

102221, 102476, 102488, 102306, 1022759

Abstract:

The present disclosure relates to systems and methods for explosive systems such as grenades with novel micro-electromechanical systems (MEMS) fuze and novel placement of the MEMS fuze providing increased performance, reliability, and safety. The MEMS fuze is disposed towards a rear portion of the explosive system providing superior performance and design flexibility. Further, the explosive system includes electronics configured to implement a launch timer and to sense impact or when the system stops spinning. The present invention includes an operational method improving safety and reliability by preventing detonation until after the launch timer expires, upon impact, or when the explosive system stops spinning.

US Patent:

6324957, Dec 4, 2001

Filed:

Jun 7, 2000

Appl. No.:

9/588560

Inventors:

John E. Hendershot - Dunkirk MD
John P. Murphy - Severna Park MD
John R. Luense - Accokeek MD

Assignee:

The United States of America as represented by the Secretary of the Navy - Washington DC

International Classification:

B64D 104

US Classification:

89 113

Abstract:

A rocket-launched line charge apparatus for obstacle breaching includes at least two explosive charges connected by detonating cord. The detonating cord passes through a flexible tubing, and is bunched in a sinuous arrangement within the plastic tubing so as to store excess detonating cord. The detonating cord is attached to the two ends of the flexible tubing by cable ties. The explosive charges, the tubing and the detonating cord are enclosed in a fabric sock formed by overbraiding, the fabric sock being the strength member connecting the two explosive charges during deployment. The plastic tubing arrangement is applicable to storage of other cords in other systems involving tethered deployment of objects.