Liferaft

• US 6,325,688 B1
• Filed: 10/26/2000
• Issued: 12/04/2001
• Est. Priority Date: 06/05/1997
• Status: Expired due to Fees

• Current Assignee: Survitec Group Limited
• Original Assignee: Wardle Storeys (Group) Ltd.
• Inventors: Martin, Michael
• Primary Examiner(s): Sotelo, Jesus D.
• Application Number:
  US09/696,023
• Time in Patent Office: 404 Days
• Field of Search: 441/35, 441/37, 441/38, 441/40, 441/44, 114/345
• US Class Current: 441/38
• CPC Class Codes: B63C 2009/042 inflatable
• CPC Class Codes: B63C 2009/046 reversible, i.e. deployable in upright or upside down positions
• CPC Class Codes: B63C 9/06 Floatable closed containers with accommodation for one or more persons inside B63C9/01 takes precedence

Abstract

A liferaft has a floor (52) surrounded by one or more inflatable tubes (50, 51). Two canopies (54a, 54b) are provided, one (54a) covering one side of the floor (52) and the other (54b) covering the other side of the floor (52). When the liferaft is deployed on water, support means, which may be an inflatable column (63), erect the canopy (54a) that is above the water. The other canopy (54b) is unerected and lies in the water. The system of weights (67) and elastic ropes (66) forms the canopy in the water into stabilizing means in the form of water pockets. Similar means are provided on the deployed canopy (54a) but, when the canopy (54a) is erected, they lie flush with the canopy surface and so do not interfere with the operation of the liferaft.

Claims

1. A reversible liferaft comprising a floor having a periphery, a first side and a second side, at least one inflatable tube surrounding and connected to the periphery of the floor, an erectable first canopy extending over the first side of the floor and an erectable second canopy extending over the second side of the floor, one of said first and second canopies being on an upper side of the liferaft when the liferaft is deployed and floating on water, support means for holding erect that one of said first and second canopies which is on the upper side of the liferaft when the liferaft is deployed and floating on water, the other of the first and second canopies then being unerected, and shaping means operative when the liferaft is deployed and floating on water for providing stabilizing means for the liferaft from part of said other canopy.

2. A reversible liferaft comprising a floor having a periphery, a first side and a second side, at least one inflatable tube surrounding and connected to the periphery of the floor, an erectable first canopy extending over the first side of the floor and an erectable second canopy extending over the second side of the floor, one of said first and second canopies being on an upper side of the liferaft when the liferaft is deployed and floating on water, support means for holding erect that one of said first and second canopies which is on the upper side of the liferaft when the liferaft is deployed and floating on water, the other of the first and second canopies then being unerected, and shaping means operative when the liferaft is deployed and floating on water for providing stabilizing means for the liferaft from part of said other canopy, wherein the shaping means form said other canopy into a stabilizing device projecting downwardly from the aside of the liferaft that is the lower side when the liferaft is deployed and floating on water.

3. A liferaft according to claim 2 wherein the stabilizing device comprises a water pocket.

4. A liferaft according to claim 3 wherein the water pocket is of triangular cross-section.

5. A liferaft according to claim 3 wherein the shaping means form the water pocket from a V-shaped fold of the canopy, the fold being provided with holes for the passage therethrough of water.

6. A liferaft according to claim 5 wherein the shaping means comprise an elastic rope, each of the first and second canopies carrying at least one elastic rope, each elastic rope being tensioned when the associated canopy is erect and forming the V-shaped fold when the associated canopy is unerected.

7. A liferaft according to claim 6 wherein plurality of elastic ropes are provided on each of the first and second canopies, the ropes associated with each canopy being arranged at spaced locations around the associated canopy, the ropes extending side-by-side.

8. liferaft according to claim 6 wherein a sheet is provided extending between upper ends of the V-shaped fold to close said upper end and so prevent water passing from the water pocket to the interior of the associated canopy.

9. A liferaft according to claim 5 wherein the shaping means comprise a weight, each of the first and second canopies carrying at least one weight, each weight forming the V-shaped fold when the associated canopy is unerected and the liferaft is deployed and floating on water.

10. A liferaft according to claim 9 wherein a plurality of weights are provided on each of the first and second canopies.

11. A liferaft according to claim 9 wherein the shaping means comprise an elastic rope, each of the first and second canopies carrying at least one elastic rope, each elastic rope being tensioned when the associated canopy is erect and forming the V-shaped fold when the associated canopy is unerected, wherein each weight is associated with a respective rope.

12. A liferaft according to claim 3, wherein the water pocket is annular extending around the whole lower side of the liferaft.

13. A liferaft according to claim 3, wherein the water pocket is sub-divided into sections.

14. reversible liferaft comprising a floor having a periphery, a first side and a second side, at least one inflatable tube surrounding and connected to the periphery of the floor, an erectable first canopy extending over the first side of the floor and an erectable second canopy extending over the second side of the floor, one of said first and second canopies being on an upper side of the liferaft when the liferaft is deployed and floating on water, support means for holding erect that one of said first and second canopies which is on the upper side of the liferaft when the liferaft is deployed and floating on water, the other of the first and second canopies then being unerected, and shaping means connected to said canopy and operative when the liferaft is deployed and floating on water to act on said canopy to shape part of said other canopy into stabilizing means.

15. The reversible liferaft of claim 14, wherein the shaping means form said other canopy into a stabilizing device projecting downwardly from the aside of the liferaft that is the lower side when the liferaft is deployed and floating on water.

16. The reversible liferaft of claim 15 wherein the stabilizing device comprises a water pocket.

17. The reversible liferaft of claim 16, wherein the shaping means form the water pocket from a V-shaped fold of the canopy, the fold being provided with holes for the passage of water therethrough.

18. The liferaft according to claim 17, wherein the shaping means compose a weight, each of the first and second canopies carrying at least one weight, each weight forming the V-shaped fold when the associated canopy is unerected and the liferaft is deployed and floating on water.