US 11,852,103 B2
Ring-shaped booster rocket
Ryan Starkey, Tucson, AZ (US); and Dario N. Altamirano, Tucson, AZ (US)
Assigned to Raytheon Company, Waltham, MA (US)
Filed by Raytheon Company, Waltham, MA (US)
Filed on Feb. 22, 2021, as Appl. No. 17/181,158.
Prior Publication US 2022/0268238 A1, Aug. 25, 2022
Int. Cl. F02K 9/76 (2006.01); F02K 9/08 (2006.01); F02K 9/34 (2006.01); B64G 1/40 (2006.01); F02K 9/97 (2006.01); F02K 9/88 (2006.01)
CPC F02K 9/763 (2013.01) [B64G 1/402 (2013.01); F02K 9/08 (2013.01); F02K 9/34 (2013.01); F02K 9/88 (2013.01); F02K 9/97 (2013.01)] 16 Claims
OG exemplary drawing
 
1. A booster rocket comprising:
an annular casing defining an annular space therewithin, and having a central opening; and
a solid rocket fuel in the annular space;
wherein the annular casing defines an annular gap that acts as a nozzle for the booster rocket; and
wherein the booster rocket is a capable of being placed around and installed around a separate object; and
wherein the annular casing includes an inner part and an outer part, with the outer part including a cylindrical forward section, and an inwardly-sloped aft section that directs flow inwardly as the flow approaches the annular gap that is at an aft end of the outer part, wherein the inwardly-sloped aft section continually slopes inward to the aft end of the outer part, wherein the annular gap is narrowest at the aft end of the outer part, wherein the annular casing includes protruding tabs at an aft end of the annular casing configured to contact but not fixedly attach to the separate object to maintain the annular gap.