Launch tube system having inflatable bladder shock isolation

• US 7,128,013 B1
• Filed: 09/26/2005
• Issued: 10/31/2006
• Est. Priority Date: 09/26/2005
• Status: Expired due to Fees

• Current Assignee: The United States of America As Represented By The Secretary of Agriculture
• Original Assignee: the united states of america as represented by the secretary of the navy
• Inventors: Plunkett, Stephen J., Dooley, Richard E.
• Primary Examiner(s): Carone, Michael J.
• Assistant Examiner(s): Klein, Gabriel J.
• Application Number:
  US11/240,783
• Time in Patent Office: 400 Days
• Field of Search: 114238-239, 89/18, 89/18.01, 89/18.04, 89/18.06, 89/18.09, 89/18.1, 89/18.12, 89/18.16
• US Class Current: 114/238
• CPC Class Codes: F41F 3/052 Means for securing the rocket in the launching apparatus
• CPC Class Codes: F41F 3/07 Underwater launching-apparatus
• CPC Class Codes: F41F 3/073 Silos for rockets, e.g. mounting or sealing rockets therein F41F3/077 takes precedence
• CPC Class Codes: F41F 3/10 from below the surface of the water

Abstract

A launch tube system has two concentric sleeves. An inner sleeve having holes formed therethrough defines a launch tube, and an outer sleeve surrounds the inner sleeve and is spaced apart therefrom. One or more flexible bladders are disposed between the inner outer sleeves. When filled with fluid, the flexible bladder(s) expands and extends into and through the holes and into confines of the inner sleeve to thereby form shock isolation for a projectile housed in the inner sleeve.

Claims

1. A launch tube system having shock isolation for a projectile housed therein, comprising:

an inner sleeve defining a launch tube, said inner sleeve having a plurality of holes formed therethrough;

an outer sleeve surrounding said inner sleeve and spaced apart therefrom;

flexible bladder means disposed between said inner sleeve and said outer sleeve; and

means for introducing a fluid under pressure into said flexible bladder means wherein, when filled with the fluid, said flexible bladder means expands and extends into and through said holes and into confines of said inner sleeve.

2. A launch tube system as in claim 1 wherein said inner sleeve and said outer sleeve are rigid.

3. A launch tube system as in claim 1 wherein said holes are evenly distributed about said inner sleeve.

4. A launch tube system as in claim 1 wherein said means for introducing a fluid under pressure comprises:

a bladder inflator to provide a fluid under pressure; and

a valve positioned between said bladder inflator and said flexible bladder for selectively providing fluid to said flexible bladder.

5. A launch tube system as in claim 1 wherein said inner sleeve defines rounded edges that form the periphery of each of said holes.

6. A launch tube system as in claim 1 wherein said flexible bladder means comprises at least one flexible bladder made from a material selected from the group consisting of elastomeric materials and composite fabric materials.

7. A launch tube system as in claim 1 wherein said flexible bladder means comprises a single annular bladder made from a material selected from the group consisting of elastomeric materials and composite fabric materials.

8. A launch tube system as in claim 1 wherein the fluid is seawater, and wherein said means for introducing the fluid comprises a valve in communication with the seawater and an interior volume of said flexible bladder means wherein, when said valve is opened, the seawater is introduced into said flexible bladder means.

9. A launch tube system having shock isolation for a projectile housed therein, comprising:

an inner sleeve defining a launch tube, said inner sleeve having a plurality of slots formed therethrough and evenly distributed about said inner sleeve; and

an outer sleeve surrounding said inner sleeve and spaced apart therefrom;

an annular flexible bladder disposed between said inner sleeve and said outer sleeve; and

means for introducing a fluid under pressure into said flexible bladder wherein, when filled with the fluid, said flexible bladder expands and extends into and through said slots and into confines of said inner sleeve.

10. A launch tube system as in claim 9 wherein said inner sleeve and said outer sleeve are rigid.

11. A launch tube system as in claim 9 wherein said slots extend axially along the length of said inner sleeve.

12. A launch tube system as in claim 9 wherein each of said slots is identically sized.

13. A launch tube system as in claim 9 wherein said inner sleeve defines rounded edges that form the periphery of each of said slots.

14. A launch tube system as in claim 9 wherein said flexible bladder is made from a material selected from the group consisting of elastomeric materials and composite fabric materials.

15. A launch tube system as in claim 9 wherein the fluid is seawater, and wherein said means for introducing the fluid comprises a valve in communication with the seawater and an interior volume of said flexible bladder wherein, when said valve is opened, the seawater is introduced into said flexible bladder.

16. A launch tube system having shock isolation for a projectile housed therein, comprising:

a rigid inner sleeve defining a launch tube, said inner sleeve having a plurality of slots formed therethrough and evenly distributed about said inner sleeve;

a rigid outer sleeve concentrically disposed about said inner sleeve and spaced apart therefrom;

an annular flexible bladder disposed between said inner sleeve and said outer sleeve; and

a valve adapted to be in communication with seawater at a pressure greater than that of an interior volume of said flexible bladder, said valve further being in communication with said interior volume of said flexible bladder wherein, when said valve is opened, the seawater is introduced into said flexible bladder to thereby cause said flexible bladder to expand wherein said flexible bladder extends into and through said slots and into confines of said inner sleeve.

17. A launch tube system as in claim 16 wherein said slots extend axially along the length of said inner sleeve.

18. A launch tube system as in claim 16 wherein each of said slots is identically sized.

19. A launch tube system as in claim 16 wherein said inner sleeve defines rounded edges that form the periphery of each of said slots.

20. A launch tube system as in claim 16 wherein said flexible bladder is made from a material selected from the group consisting of elastomeric materials and composite fabric materials.