Patent ID: 9702320
Date: 2017-07-11
CPC Classifications: F02K

Claim:
1. A pulse unit of a multi-pulse rocket motor, said pulse unit comprising: a motor case having a forward joint arranged at a forward end of said pulse unit and a rearward joint arranged at a rearward end of said pulse unit; a propellant being filled from said forward joint to said rearward joint along an inner circumferential surface of said motor case so as to have an inner circumferential surface of a hollow cylindrical shape; an igniter disposed to ignite said propellant; a barrier membrane having a first barrier membrane and a second barrier membrane to cover a whole of an initial burning surface of said propellant and said igniter wherein said barrier membrane is in contact with the inner circumferential surface of said propellant; and a first barrier membrane holder and a second barrier membrane holder respectively coupled to said forward joint and said rearward joint through O-rings to hold said first barrier membrane and said second barrier membrane such that said first barrier membrane and said second barrier membrane seal said propellant from a combustion gas of another propellant other than said propellant and such that said barrier membrane is mechanically fixed to said motor case by said first barrier membrane holder and said second barrier membrane holder, wherein said forward joint is disposed so as to be connectable with a rearward joint of a next-stage pulse unit or a joint of a head unit, wherein said rearward joint is disposed so as to be connectable with a forward joint of a previous-stage pulse unit or a joint of a nozzle unit, wherein said first barrier membrane holder is integrated into said first barrier membrane and has a groove to accept a first of said O-rings, and wherein said second barrier membrane holder is integrated into said second barrier membrane and has a groove to accept a second of said O-rings.