# US 10,246,167 B2 · Boat having a movable stern hatch with a submersible stern platform

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- Number: US 10,246,167 B2
- Document ID: US10246167B2
- Status: Granted
- Kind: B2
- Application number: 15/736,810
- Filed: 2015-06-23
- Published: 2018-12-20
- Granted: 2019-04-02
- Earliest claimed: 2015-06-23
- Applicants: Ferretti S.P.A.
- Inventors: Andrea Frabetti
- Web page: https://patentgrep.com/patent/US10246167B2

## CPC

- B63B 27/143: {Ramps}
- B63B 27/14: of ramps, gangways or outboard ladders {; Pilot lifts}
- B63B 27/36: {Arrangement of ship-based loading or unloading equipment} for floating cargo {(deployment or recovery of underwater vehicles using lifts of hoists B63B27/16)}
- B63B 2027/141: {telescopically extendable}
- B63B 2029/022: {Bathing platforms}
- B63B: SHIPS OR OTHER WATERBORNE VESSELS; EQUIPMENT FOR SHIPPING (arrangements of vessel ventilation, heating, cooling, or air-conditioning B63J2/00; floating substructures as supports of dredgers or soil-shifting machines E02F9/06)

## Abstract

A boat includes a hull provided with a rear stern hatch located in correspondence with an internal stern compartment of the hull and suitable for opening and closing in correspondence with an aperture of the compartment. The hatch having a body with opposed sides located in correspondence with side walls of the compartment and upper edge and lower edge. The hull having a stern platform that is movable and submersible. The hatch is not provided with any direct connections to the hull, but it is connected to the stern platform to reach, upon opening, a position submersed in the water where the boat is located in the moment when the platform submerges into the water.

## Claims

### Claim 1

A boat comprising a hull provided with a rear stern hatch located in correspondence with an internal stern compartment of said hull and suitable for opening and closing in correspondence with an aperture of said compartment,
said hatch having a body with opposed sides located in correspondence with side walls of said compartment and upper edge and lower edge,
said hull also having a movable and submergible stern platform,
wherein the hatch has no direct connections to the hull, but the hatch is connected to the stern platform in such a way as to reach, upon opening, a position submerged in the water where the boat is located in the moment when said platform submerges into said water,
actuating means being provided to move the hatch integral with the movable stern platform and suitable for allowing the opening and the closing of the compartment of the hull by moving said hatch.

### Claim 2 (depends on 1)

The boat according to claim 1, wherein said actuating means comprise at least one telescopic member integral with the hatch and with the movable platform.

### Claim 3 (depends on 2)

The boat according to claim 2, wherein said telescopic actuating member is alternatively a hydraulic, pneumatic, hydropneumatic or electric telescopic actuating member.

### Claim 4 (depends on 2)

The boat according to claim 2, wherein said telescopic actuating member is alternatively a hydraulic, pneumatic, or hydropneumatic telescopic actuating member, and is controlled by a control unit installed outside the hatch.

### Claim 5 (depends on 1)

The boat according to claim 1, wherein the actuating means constrain the hatch to the movable stern platform and enable the hatch, upon opening and said movable platform being submerged, to reach a position submerged in the water where the boat is located.

### Claim 6 (depends on 1)

The boat according to claim 1, wherein the stern platform comprises three adjacent portions, one portion interposed between the remaining two being movable, defining the movable stern platform, and carrying the actuating means of the hatch, the remaining portions of the stern platform being fixed to the hull.

### Claim 7 (depends on 1)

The boat according to claim 1, wherein the movable stern platform cooperates with actuator members suitable for allowing its movement with respect to the hull, said actuator members comprising a portion fixed to the hull and a portion movable with respect to that portion fixed to the hull, the movable platform being constrained to the portion fixed to the hull.

### Claim 8 (depends on 1)

The boat according to claim 1, wherein the stern compartment is floodable.