US 11,859,579 B1
System for multiple burns from a rocket motor
Nicholas Dallmann, Los Alamos, NM (US); Ian Shelburne, Los Alamos, NM (US); Kavitha Chintam, Los Alamos, NM (US); Malakai Coblentz, Los Alamos, NM (US); David Hemsing, Los Alamos, NM (US); Joseph Lichthardt, Los Alamos, NM (US); Bryce Tappan, Los Alamos, NM (US); and Mahlon S. Wilson, Los Alamos, NM (US)
Assigned to TRIAD NATIONAL SECURITY, LLC, Los Alamos, NM (US)
Filed by Triad National Security, LLC, Los Alamos, NM (US)
Filed on Jul. 29, 2020, as Appl. No. 16/941,642.
Claims priority of provisional application 62/879,783, filed on Jul. 29, 2019.
Claims priority of provisional application 62/879,818, filed on Jul. 29, 2019.
Int. Cl. F02K 9/86 (2006.01); F02K 9/76 (2006.01); F02K 9/34 (2006.01); F02K 9/28 (2006.01); F02K 9/84 (2006.01)
CPC F02K 9/86 (2013.01) [F02K 9/28 (2013.01); F02K 9/34 (2013.01); F02K 9/763 (2013.01); F02K 9/84 (2013.01); F05D 2240/1281 (2013.01)] 18 Claims
OG exemplary drawing
 
1. A decompressive extinguishing plug nozzle, comprising:
an outer cowl, wherein shelves formed in the outer cowl define a track along which a wheel bearing is configured to traverse;
a plug;
a plug housing that houses the plug;
a plug seal, wherein the plug housing is connected to the plug via the plug seal, and wherein the plug seal is configured to seal against an inside of a rocket body downstream from a combustion chamber; and
a mechanically variable throat at least partially defined by the outer cowl and the plug, wherein traversal of the wheel bearing along the track is configured to cause movement of the outer cowl relative to the plug thereby transitioning the decompressive extinguishing plug nozzle from a sealed configuration to an active configuration, wherein the mechanically variable throat defines a choked sonic flowpath in the active configuration.