Patent ID: 6053157
Filing Date: 2000-04-25
Classification: F41B

Abstract:
A fluid propulsion device for discharging a working fluid at a predetermined variable discharge rate, said fluid propulsion device comprising:a fluid chamber, said fluid chamber being expandable upon receiving said working fluid and contractible upon discharging said working fluid, said fluid chamber including a plurality of chamber sections, wherein each of said plurality of chamber sections have a different predetermined coefficient of elasticity for contracting at different predetermined rates to discharge said working fluid from said fluid chamber at said predetermined variable discharge rate determined by said chamber section;at least one base portion joined to said fluid chamber and having at least one aperture, therein, in communication with said fluid chamber, for allowing said working fluid to be received and discharged, said base portion having a first end and a second end, said first end including said at least one aperture for receiving said working fluid, said base portion being cylindrically extended between said first and second ends;a sealed sliding member slidably disposed in said base portion proximate said second end of said base portion, said sealed sliding member sliding within said base portion to expand said fluid chamber upon receiving said working fluid, and to contract said fluid chamber upon discharging said working fluid;at least one sliding ring slidably disposed within said base portion between said first end and said sealed sliding member and forming said plurality of chamber sections;at least a first resilient member coupling said at least one sliding ring to said base portion proximate said first end of said base portion; andat least a second resilient member coupling said at least one sliding ring to said sealed sliding member, wherein said first resilient member and said second resilient member have said different predetermined coefficient of elasticity to cause said plurality of chamber sections to contract at said different predetermined rates upon discharging said working fluid.