Hose anti-collapse ribs, systems and methods

1. A hose anti-collapse rib comprising:

a first cantilevered portion curved in a first direction and defining a first end;

a second cantilevered portion curved with a different curvature than said first cantilevered portion and in a direction facing said first direction and defining a second end disposed at an opposite extent of said rib from said first end;

means for locking said first end to said second end such that said first and second cantilevered portions together form a generally circular shape, and

an interference ridge defined in an exterior surface of said cantilevered portions,

wherein said interference ridge is adapted to deform a generally flexible hose in which said rib is disposed to provide an interference interlock between said rib and said hose when said rib is expanded within said hose.

2. The rib of claim 1 wherein in a relaxed state in which said means for locking is not engaged, said rib defines a non-circular spiral.

3. The rib of claim 1 , wherein said means for locking comprises complementary tabs defined by said ends.

4. The rib of claim 3 , wherein each of said tabs is an end portion of said respective cantilevered portion and each of said tabs has a thickness approximately one-half the thickness of said respective cantilevered portion.

5. The rib of claim 4 , wherein said tab defined by said first cantilevered portion is generally aligned with an outer portion of said first cantilevered portion and said tab defined by said second cantilevered portion is generally aligned with an inner portion of said second cantilevered portion.

6. The rib of claim 3 , wherein one of said tabs comprise a leading edge and another of said tabs comprises a complementary leading edge receptive notch.

7. The rib of claim 3 , wherein said locking means further comprises adhesive securing said tabs to one another.

8. The rib of claim 3 , further comprising:

a locking ridge defined in an outside surface of one of said tabs; and

a complementary groove defined in an inside surface of said other of said tabs, adapted to receive said ridge.

9. The rib of claim 8 , wherein said groove extends beyond the other tab along an inside surface of the respective cantilevered portion.

10. The rib of claim 1 , wherein said means for locking comprises a ratcheting mechanism.

11. The rib of claim 1 , wherein external edges of said cantilevered portions are tapered.

12. The rib of claim 1 , wherein internal edges of said cantilevered portions are tapered.

13. A method comprising:

disposing a hose anti-collapse rib within a generally flexible hose subject to vacuum;

expanding opposite curved cantilevered portions of said rib to form said rib into a generally circular shape in contact with an inner surface of said hose;

locking said hose anti-collapse rib in said generally circular shape;

preventing movement of said rib within said hose by engaging an interior surface of said hose with a interference ridge defined in an outer surface of said rib; and

preventing movement of said rib within said hose by adhering an exterior surface of said rib to an interior surface of said hose.

14. The method of claim 13 wherein, said locking comprises mating a first tab defined by an end of a first of said cantilevered portions with a second tab defined by an end of a second of said cantilevered portions.

15. The method of claim 14 , wherein said locking further comprises indexing a ridge defined in an outer surface of one of said tabs in a groove defined in an inner surface of the other of said tabs.

16. The method of claim 15 , wherein said expanding further comprises sliding said ridge in a groove defined in an inside surface of the other of said cantilevered portions, guiding said ridge into said groove defined in said inner surface of said other tab.