Mast system and method

Patent metadata

Field	Value
Publication number	US-2016236753-A1
Application number	US-201415026118-A
Country	US
Kind code	A1
Filing date	Sep 29, 2014
Priority date	Oct 2, 2013
Publication date	Aug 18, 2016
Grant date	—

Abstract

Mast systems are provided for use with an underwater vehicle. In one example the mast system includes a support base, a mast arm and a mast payload bay. The support base defines a base axis. The mast arm defines a longitudinal axis, and has a free longitudinal mast end and a mast mounting portion longitudinally spaced from the mast end. The mast payload bay is provided at the mast end, and is configured for supporting a payload. The mast arm is mounted to the support base via the mast mounting portion, and the mast arm is selectively deployable with respect to the support base at least between a retracted configuration, in which the mast end is at a first spacing with respect to the mast mounting portion, and an extended configuration, in which the mast end is at a second spacing with respect to the mast mounting portion, the second spacing being greater than the first spacing. The mast system is configured for operating in a marine environment.

First claim

1 . A mast system for use with an underwater vehicle, comprising:
a support base defining a base axis; a mast arm defining a longitudinal axis, and comprising a free longitudinal mast end and a mast mounting portion longitudinally spaced from said mast end; a mast payload bay provided at said mast end, configured for supporting a payload therein; the mast arm being mounted to the support base via said mast mounting portion, and the mast arm being selectively deployable with respect to the support base at least between a retracted configuration, in which said mast end is at a first spacing with respect to said mast mounting portion, and an extended configuration, in which said mast end is at a second spacing with respect to said mast mounting portion, wherein said second spacing is greater than said first spacing, wherein the mast system is configured for operating in a marine environment.

2 . The mast system according to claim 1 , comprising a pressure vessel, wherein said payload bay is selectively reversibly retractable into said pressure vessel to enable isolating a payload bay pressure from an ambient pressure outside of said pressure vessel.

3 . The mast system according to claim 1 or claim 2 , wherein said mast arm comprises a plurality of longitudinally movable nested telescopic sections between said mast end and said mast mounting portion.

4 . The mast system according to any one of claims 1 to 3 , comprising a first drive unit for selectively driving said mast end longitudinally away from said mast mounting to provide said extended configuration, and for selectively driving said mast end longitudinally towards said mast mounting to provide said retracted configuration.

5 . The mast system according to any one of claims 1 to 4 , wherein said mast arm is pivotably mounted to said support base about a pivot axis via said mast mounting portion, said pivot axis being orthogonal to said longitudinal axis.

6 . The mast system according to claim 5 , wherein said mast arm is reversibly pivotably movable with respect to said support base about said pivot axis between a stowed position and a deployed position.

7 . The mast system according to claim 6 , comprising a second drive unit for selectively pivoting said mast arm about said pivot axis from said stowed position to said deployed position, and for selectively pivoting said mast arm about said pivot axis from said deployed position to said stowed position.

8 . The mast system according to any one of claims 6 to claim 7 , wherein in said stowed position, said mast arm is in said retracted configuration, and wherein in said deployed position said mast arm is selectively deployable to said extended configuration.

9 . The mast system according to any one of claims 6 to 8 , wherein in said stowed position, said longitudinal axis is parallel to said base axis, and wherein in said deployed position said longitudinal axis is orthogonal to said base axis.

10 . The mast system according to any one of claims 5 to 9 , wherein said pivot axis is orthogonal to said base axis.

11 . The mast system according to any one of claims 1 to 10 , wherein said payload bay is pivotable about said longitudinal axis, at least in said extended configuration.

12 . The mast system according to any one of claims 2 to 10 , wherein said pressure vessel comprises a closable payload housing, and wherein said payload bay is selectively reversibly retractable into said payload housing between a housed configuration and an exposed configuration.

13 . The mast system according to claim 12 , wherein in said housed configuration, fluid communication is prevented between said payload bay and an outside of said mast system.

14 . The mast system according to any one of claims 12 and 13 , wherein said pressure vessel comprises a bulkhead arrangement, wherein in said housed configuration said payload housing is configured for sealing with respect to said bulkhead arrangement to prevent fluid communication between said payload bay and an outside of said mast system, and wherein in said exposed configuration said payload housing is configured for being unsealed with respect to said bulkhead arrangement and to provide fluid communication between said payload bay and an outside of said mast system.

15 . The mast system according to claim 14 , wherein said bulkhead arrangement is fixed to the payload bay.

16 . The mast system according to any one of claims 12 to 15 , wherein said bulkhead arrangement comprises an outer facing bulkhead at an outer longitudinal end of said payload bay, said bulkhead configured for preventing fluid communication between said payload bay and an outside of said mast system in a longitudinal outward direction through said bulkhead, said bulkhead further comprising a bulkhead sealing perimeter configured for sealing with respect to said payload housing in said housed configuration.

17 . The mast system according to claim 16 further comprising an auxiliary payload bay projects outwardly from said bulkhead, said auxiliary payload bay being in communication with said payload bay.

18 . The mast system according to claim 16 or claim 17 , wherein said payload housing comprises a chamber configured for accommodating therein said payload bay in said housed configuration, said chamber having a chamber opening configured to allow said payload bay to be selectively and reversibly retracted with respect to said payload housing, said opening comprising a housing sealing perimeter for reversibly sealing with respect to said bulkhead sealing perimeter in said housed configuration.

19 . The mast system according to claim 18 , wherein said bulkhead is disc-shaped and wherein said payload housing comprises a lateral peripheral wall having a payload housing axis parallel to said longitudinal axis, and defining said chamber opening and a closed end at respective opposite longitudinal ends of said lateral peripheral wall.

20 . The mast system according to claim 19 , wherein said lateral peripheral wall is a tubular wall.

21 . The mast system according to any one of claims 16 to 20 , comprising an inflatable seal arrangement for selectively sealing and for selectively unsealing said bulkhead with respect to said payload housing.

22 . The mast system according to any one of claims 2 to 21 , wherein said pressure vessel is configured for enabling the payload bay to have a said payload bay pressure isolated from an outside of said mast system, in said housed configuration.

23 . The mast system according to any one of claims 12 to 22 , wherein said pressure vessel maintains said payload bay pressure constant in said housed configuration.

24 . The mast system according to any one of claims 22 to 23 , wherein said pressure vessel operates to maintain said payload bay pressure at below a threshold value, in said housed configuration.

25 . The mast system according to claim 24 , wherein said threshold value is a gauge pressure of 1 bar or less.

26 . The mast system according to claim 24 or claim 25 , wherein said threshold value is a gauge pressure of 1 bar or less, while an outside ambient pressure is under a gauge pressure of more than 5 bar.

27 . The mast system according to any one of claims 12 to 26 , wherein said payload bay is in said housed configuration concurrent with said mast arm being in said retracted con

Assignees

• Elta Systems Ltd

Inventors

• Farber Amit
• Erell Ehud

Classifications

• B63G8/38

  Arrangement of visual or electronic watch equipment, e.g. of periscopes, of radar {(periscopes, optical aiming or sighting devices per se G02B23/00)} · CPC title

• B63B15/00 Primary

  Superstructures {, deckhouses, wheelhouses or the like}; Arrangements or adaptations of masts {or spars, e.g. bowsprits}(loading or unloading equipment B63B27/00; masts and staying in general E04H; sails, running rigging B63H; {mounting ladders or the like on masts B63B29/205}) · CPC title

• B63B2015/0041

  Telescoping masts · CPC title