DE3301721A1 - BOAT WITH AN INFLATABLE BOAT BODY - Google Patents

Description

Boat with an inflatable hull

The invention relates to a boat according to the preamble of claim 1.

Inflatable lifeboats are generally stored folded up and used with when needed Pressurized gas expanded from a gas cylinder. To avoid the lifeboat in any case is not inflated sufficiently ■ even after a leak from the cylinder, is usually taken to ensure that the cylinder contains more gas than for Inflating the lifeboat is required, taking the excess gas from the boat over a pressure relief valve is drained. It is also common to provide a canopy, which, when the boat is inflated, provides a protective roof for the people in it forms. In order to improve the thermal insulation properties of the canopy, it is in this one Known context to form the canopy with two layers.

The object of the invention is to increase the effectiveness of a double-layer roof with extraordinarily can be enlarged considerably at low cost and without significant effort. 5

According to the invention, this object is achieved in the characterizing part of the claim 1 specified features solved.

The canopy preferably has an inlet valve and a device which enables that the roofing additionally by the mouth pressure or by a pump, which is operated by people in the boat, can be inflated or topped up. Such a device can have an inlet valve and a pipe socket, by means of which the gas can also be let out from the roofing if necessary. The canopy can also have a pressure relief valve to prevent over-inflation of the canopy to prevent.

If the lifeboat is to be packed, it is essential that the canopy is complete is evacuated. To ensure this

Most of the time, the filler valve can be used and is a gas flow channel from distant Parts of the canopy provided for the valve. This can be done through a cord or pipe Od. Like. Are arranged, which is arranged within the canopy, so that a Gas through-flow channel is formed when the roofing unit is level or flat.

Exemplary embodiments of the invention are described below with reference to the drawing. Show in it

Fig. 1 is a perspective view of an embodiment of a front

preferably inflatable liferaft according to the invention,

Fig. 2 is a sectional view along the line II-II in Fig. 1,

FIG. 3 shows an enlarged sectional view along the line III-III of FIG
25th

FIG. 4 is a sectional view of part of a further embodiment of FIG Invention.

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A preferred boat 10 according to the invention is a liferaft with a raft body. by a pair of hollow, united rings 11, 12 around the periphery of a base 13. A semicircular inflatable arch member 14 supports a canopy 15. The rings 11, 12 and the arch part 14 are connected to one another in a gas-conducting manner and can be via a cylinder 16 are fed with gas and inflated.

IQ Excess gas can escape from the rings 11 via a pressure relief valve 17 and flows through a pipe 18 to the space 19 between the two layers 20, 21 of the roof 15, which is inflated as a result and thus has higher thermal insulation properties. The canopy can additionally be inflated or "filled" via a valve 22, which can also be used to lead gas out of the canopy 15.

In order to prevent excessive inflation of the canopy, a pressure relief valve 23 can be provided be. The canopy 15 has an entrance opening 24 which passes through a door 25 is lockable, which is shown in a folded and retained position is.

When the boat 10 is folded and for storage reasons is packaged, such as in the case of a liferaft on a ship, the canopy must be fully evacuated to keep the volume to a minimum. To this end, the valve 22

3 3017 2 Ί

used to allow gas to escape, particularly gas to escape from remote parts of the canopy, including cords 26 or the like. Inside the canopy 15 can be arranged to form gas ducts when the canopy 15 is folded flat becomes (Fig. 3).

Instead of a tube, a direct connection between the ring 11 and the interior of the Canopy 15 (Fig. 4) may be provided. Furthermore, the hull does not have to be circular in plan but can, if necessary, be polygonal, for example hexagonal.

Claims (7)

Patent claims: 1.Boat with an inflatable hull, a double-layer canopy made of an air-impermeable material and with a storage device for pressurized gas to inflate the hull,
marked by
a pressure relief valve (17) for releasing excess gas from the hull during inflation, an outlet of the pressure relief valve (17) which is fluidly connected to the interior space (19) of the canopy (15) in such a way that excess gas is discharged from the valve (17) is used to inflate the roof to increase its thermal insulation properties. 2. Boat according to claim 1,
characterized, that the canopy (15) has an inlet valve and a device which a allows additional inflation or filling by mouth pressure or by means of a pump, 3. boat according to claim 2,
characterized, that the device has an inlet valve and a pipe which allows a discharge of Allowing gas from the roof. 4. Boat according to claim 1, 2 or 3, characterized in that that the canopy (15) has a pressure relief valve (23) to prevent excessive inflation to prevent the roofing. 5. boat according to claim 2,
characterized, that the filling valve (22) is used for evacuation for essentially complete evacuation and means are provided to remote one or more gas flow channels Divide the canopy to form the valve. 6. boat according to claim 5,
characterized, That the means is a cord or the like. Which is arranged within the canopy in this way is that it forms a gas flow channel when the canopy is flat. 7. Boat according to one of the preceding claims, characterized in that that the boat is a life raft.