Delivery systems for pressure protecting and delivering a submerged payload and methods for using the same

• US 8,166,904 B2
• Filed: 07/29/2009
• Issued: 05/01/2012
• Est. Priority Date: 12/12/2007
• Status: Active Grant

• Current Assignee: iRobot Corporation
• Original Assignee: iRobot Corporation
• Inventors: Israel, Steven Craig, Germana, Dominic Caza, Greiner, Craig A., Vosburgh, Frederick
• Primary Examiner(s): Olson, Lars A
• Application Number:
  US12/511,676
• Publication Number:
  US 20100107959A1
• Time in Patent Office: 1,007 Days
• Field of Search: 89/18.09, 89/18.1, 114/312, 114/316, 114/319, 277/314, 277/608, 277/612, 277/626, 277/628, 277/644, 277/647, 367/1, 367/131, 367/188
• US Class Current: 114/319
• CPC Class Codes: B63B 2022/006 specially adapted for measuring or watch purposes
• CPC Class Codes: B63B 22/003 adapted for being launched from an aircraft or water vehicle;, e.g. with brakes deployed in the water
• CPC Class Codes: B63B 22/06 with means to cause the buoy to surface in response to a transmitted signal B63B22/023 takes precedence
• CPC Class Codes: B63B 22/12 the surfacing of the buoy being assisted by a gas released or generated on submergence of the buoy
• CPC Class Codes: B63B 22/24 container type, i.e. having provision for the storage of material
• CPC Class Codes: B63G 6/00 Laying of mines or depth charges; Vessels characterised thereby arrangements on submarines for mine laying B63G8/33
• CPC Class Codes: B63G 9/00 Other offensive or defensive arrangements on vessels against submarines, torpedoes, or mines
• CPC Class Codes: H04B 11/00 Transmission systems employing sonic, ultrasonic or infrasonic waves
• CPC Class Codes: H04B 13/02 Transmission systems in which the medium consists of the earth or a large mass of water thereon, e.g. earth telegraphy

Abstract

A payload delivery unit for protecting and delivering a payload submerged in a submersion medium comprises a container including a pressure resistant shell and a resilient seal device. The shell defines a containment chamber and includes first and second shell members having opposed first and second sealing faces, respectively. The seal device engages and is interposed between the first and second sealing faces. The container is configured and constructed such that: when the submersion medium applies an exterior pressure to the first and second shell members such that a shell pressure differential, defined as the exterior pressure less an interior pressure of the containment chamber, exceeds a prescribed pressure, the first and second shell members compressively load and deform the seal device to effect a seal between the first and second shell members that prevents ingress of the submersion medium into the containment chamber; and when the shell pressure differential is less than the prescribed pressure, the seal device elastically rebounds to separate the first and second shell members to permit ingress of the submersion medium into the containment chamber.

Claims

1. A payload delivery unit for protecting and delivering a payload submerged in a submersion medium, the payload delivery unit comprising a container including:

a pressure resistant shell defining a containment chamber and including first and second shell members having opposed first and second sealing faces, respectively; and

a resilient seal device engaging and interposed between the first and second sealing faces;

wherein the container is configured and constructed such that;

when the submersion medium applies an exterior pressure to the first and second shell members such that a shell pressure differential, defined as the exterior pressure less an interior pressure of the containment chamber, exceeds a prescribed pressure, the first and second shell members compressively load and deform the seal device to effect a seal between the first and second shell members that prevents ingress of the submersion medium into the containment chamber, wherein the compressively loaded and deformed seal device operates as a biasing device tending to mechanically force the first and second shell members apart from one another; and

when the shell pressure differential is less than the prescribed pressure, the seal device elastically rebounds to automatically mechanically force or assist in automatically mechanically forcing the first and second shell members apart from one another to permit ingress of the submersion medium into the containment chamber.

2. The payload delivery unit of claim 1 wherein the container is configured and constructed such that:

when the payload delivery unit is located at or below a prescribed depth in the submersion medium, the first and second shell members compressively load and deform the seal device to effect the seal between the first and second shell members to prevent ingress of the submersion medium into the containment chamber; and

when the payload delivery unit is located above the prescribed depth, the seal device elastically rebounds to passively, automatically separate the first and second shell members to permit ingress of the submersion medium into the containment chamber.

3. The payload delivery unit of claim 2 wherein the prescribed depth is in the range of from about 0 to 100 meters.

4. The payload delivery unit of claim 2 wherein, when the payload delivery unit is located above the prescribed depth, the seal device rebounds to fully passively, automatically separate the first and second shell members to permit ingress of the submersion medium into the containment chamber.

5. The payload delivery unit of claim 1 including a pressure generator operable to selectively increase the interior pressure to actively reduce the pressure differential.

6. The payload delivery unit of claim 1 wherein the interior pressure of the containment chamber is less than atmospheric.

7. The payload delivery unit of claim 1 wherein the seal device is formed of an elastomeric material.

8. The payload delivery unit of claim 1 wherein the seal device has a durometer in the range of from about 10 to 90 Shore A.

9. The payload delivery unit of claim 1 wherein the first and second shell members are hemispherical, and the seal device and the first and second sealing faces are substantially annular.

10. The payload delivery unit of claim 1 wherein the first shell member has a seal channel defined in the first sealing face and the seal device is disposed in the seal channel.

11. The payload delivery unit of claim 1 wherein the seal device has a textured surface engaging at least one of the first and second shell members.

12. The payload delivery unit of claim 1 including a payload disposed in the containment chamber.

13. The payload delivery unit of claim 1 wherein the container is configured such that the first and second shell members fully separate and detach from one another after the first and second shell members are forced apart.

14. A method for protecting and delivering a payload submerged in a submersion medium, the method comprising:

providing a payload delivery unit comprising a container including;

a pressure resistant shell defining a containment chamber and including first and second shell members having opposed first and second sealing faces, respectively; and

a resilient seal device engaging and interposed between the first and second sealing faces;

submerging the container with the payload mounted in the containment chamber;

maintaining the payload delivery unit in a sealed condition wherein the submersion medium applies an exterior pressure to the first and second shell members such that a shell pressure differential, defined as the exterior pressure less an interior pressure in the containment chamber, exceeds a prescribed pressure, whereby the shell members compressively load and deform the seal device to effect a seal between the first and second shell members that prevents ingress of the submersion medium into the containment chamber, wherein the compressively loaded and deformed seal device operates as a biasing device tending to mechanically force the first and second shell members apart from one another; and

thereafter

causing the shell pressure differential to become less than the prescribed pressure, whereupon the seal device elastically rebounds to automatically mechanically force or assist in automatically mechanically forcing the first and second shell members apart from one another to permit ingress of the submersion medium into the containment chamber.

15. The method of claim 14 wherein:

maintaining the payload delivery unit in a sealed condition includes maintaining the payload delivery unit at a first depth or depths at or below a prescribed depth in the submersion medium, responsive to which the first and second shell members compressively load and deform the seal device to effect the seal between the first and second shell members that prevents ingress of the submersion medium into the containment chamber; and

causing the pressure differential to become less than the prescribed pressure includes permitting the payload delivery unit to rise to a second depth above the prescribed depth, responsive to which the seal device elastically rebounds to passively, automatically separate the first and shell members to permit ingress of the submersion medium into the containment chamber.

16. The method of claim 15 wherein, when the payload delivery unit is located at the second depth, the seal device elastically rebounds to fully passively, automatically separate the first and second shell members to permit ingress of the submersion medium into the containment chamber.

17. The method of claim 14 wherein:

the payload delivery unit includes a pressure generator; and

causing the pressure differential to become less than the prescribed pressure includes selectively increasing the interior pressure to actively reduce the pressure differential using the pressure generator.

18. The method of claim 14 including, after and as a result causing the pressure differential to become less than the prescribed pressure and permit ingress of the submersion medium into the containment chamber, separating the first and second shell members and releasing the payload from the container.

19. The method of claim 14 including scuttling at least one of the first and second shell members after forcing the first and second shell members apart from one another.

20. The method of claim 14 including fully separating and detaching the first and second shell members from one another after the first and second shell members are forced apart.