Power plants – Reaction motor – With destruction sensing and preventing means
Patent
1994-07-29
1996-10-15
Thorpe, Timothy S.
Power plants
Reaction motor
With destruction sensing and preventing means
60255, 220 892, F02K 900
Patent
active
055642721
ABSTRACT:
The present invention is directed to a novel pressure vessel and process for manufacturing the pressure vessel. In one embodiment, the invention includes a case for a rocket motor which includes a cylindrical, metal shell which has been configured with a plurality of slots positioned in axially extending rows. A fiber reinforced plastic layer is attached to the metal shell. Each slot has a length (L) and is separated by adjacent slots in the same row by an axial distance (A) with adjacent rows of slots separated by a circumferential distance (C) and configured such that L+A.gtoreq.6C and L.gtoreq.4A. The method of the invention comprises using a CO.sub.2 laser to cut a keyhole in the shell and then cutting axially outwardly from the keyhole to form the slot, resulting in slots having a width equal to the cutting width of the laser. The beam is then defocused and used to heat a portion of the metal shell surrounding the ends of each slot to produce a tempered zone.
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Berndt Wayne E.
Davis Kevin W.
Lauritzen Scott W.
Thompson, Jr. O. N.
Warner Mark J.
Lyons Ronald L.
Thiokol Corporation
Thorpe Timothy S.
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