公开(公告)号：US20230391435A1

公开(公告)日：2023-12-07

申请号：US18259955

申请日：2022-01-19

Applicant: SAAB AB

Inventor： Anders RYDELL ,  Torbjörn GREEN

IPC: B63G8/22 ,  B63G8/00 ,  B63G8/04 ,  F42B19/12

CPC classification number: B63G8/22 ,  B63G8/001 ,  B63G8/04 ,  F42B19/125 ,  B63G2008/002

Abstract: The present disclosure relates to a nose arrangement (100) for an underwater vehicle (10). The nose arrangement comprises a first separation section (110) comprising a first inflatable structure (113) and a second inflatable structure (114) arranged within the first inflatable structure (113). The first separation section (110) is arranged store the first inflatable structure (113) and the second inflatable structure (114) in a first state, and to inflate the first inflatable structure (113) and the second inflatable structure (114) in a second state. The first inflatable structure (113) is arranged to protrude along the longitudinal axis of the nose arrangement and underwater vehicle in the second state. The disclosure also relates to a method for deploying a nose arrangement (100) of an underwater vehicle.

公开(公告)号：US20230257089A1

公开(公告)日：2023-08-17

申请号：US18044191

申请日：2021-09-13

Applicant: SAAB AB

Inventor： Anders RYDELL

IPC: B63H1/22 ,  B63H23/34 ,  B63H21/21 ,  B63G8/08

CPC classification number: B63H1/22 ,  B63G8/08 ,  B63H21/21 ,  B63H23/34 ,  B63G2008/004 ,  B63H2021/216

Abstract: The present invention regards a watercraft vehicle (1) having a propeller shaft (9) coupled to a motor (3) and a propeller (7) forming a propeller disc (11) having a hub (17). A first blade (8) of the propeller (7) is hingedly coupled to a first oblique lag-pitch hinge (22′) of the hub (17) and a second blade (10) of the propeller (7) is hingedly coupled to a second oblique lag-pitch hinge (22″) of the hub (17). The first oblique lag-pitch hinge (22′) being oriented in a direction oblique to the axis of rotation (RX) and parallel with the second oblique lag-pitch hinge (22″). A control circuitry (5) provides a first thrust (T′) in a first arc segment (13′) of the propeller disc (11) and provides a second thrust (T″) in a second arc segment (13″) of the propeller disc (11) by controlling a rate of change of shaft (9) rotational velocity, wherein a first propeller blade pitch change is achieved about the first oblique lag-pitch hinge (22′) and a second propeller blade pitch change is achieved about the second oblique lag-pitch hinge (22″). The present invention also regards a method of manoeuvring the watercraft vehicle (1).