The present application relates to the field of underwater propeller, and more particular, to a multifunctional underwater propeller, which includes a propeller body. The propeller body is detachably connected with a handle, and a surface of the propeller body is connected with an adapter structure for detachably connecting external equipment. The adapter structure includes a connecting piece and a slide rail, and the connecting piece is in plug-in connection with the slide rail, and configured for detachably connecting the external equipment.

The present application relates to the field of underwater propeller, and more particular, to a multifunctional underwater propeller, which includes a propeller body. The propeller body is detachably connected with a handle, and a surface of the propeller body is connected with an adapter structure for detachably connecting external equipment. The adapter structure includes a connecting piece and a slide rail, and the connecting piece is in plug-in connection with the slide rail, and configured for detachably connecting the external equipment.

A handheld, detachable implement for propelling a paddleboard which affixed to a distal end of an oar, the implement comprising a propeller, motor and power supply. The oar and propulsion implement may be formed as a single integrated piece or held together using a friction fit. A plurality of sensor and indicator integrate into the implement.

A handheld, detachable implement for propelling a paddleboard which affixed to a distal end of an oar, the implement comprising a propeller, motor and power supply. The oar and propulsion implement may be formed as a single integrated piece or held together using a friction fit. A plurality of sensor and indicator integrate into the implement.

A testing device for testing a drive train or components within a marine propulsion system is provided and includes a first disk with a plurality of first disk depressions that faces a second disk with a plurality of second disk depressions. The first disk and the second disk are secured relative to each other so that they define a space, and a seal at outer edges of the disks is in fluid communication with the space. One of the first disk and the second disk is secured to a driven shaft. Upon rotation of the driven shaft, a load is produced due to shearing of fluid between the disks, yet no thrust is produced.

A testing device for testing a drive train or components within a marine propulsion system is provided and includes a first disk with a plurality of first disk depressions that faces a second disk with a plurality of second disk depressions. The first disk and the second disk are secured relative to each other so that they define a space, and a seal at outer edges of the disks is in fluid communication with the space. One of the first disk and the second disk is secured to a driven shaft. Upon rotation of the driven shaft, a load is produced due to shearing of fluid between the disks, yet no thrust is produced.

A boat and a propeller assembly for a boat. The propeller assembly includes a propeller and a thrust bearing, and the thrust bearing is made of a harder material than the propeller. The boat may also include a hull, a drive shaft, and a motor. The motor may be positioned within the hull and configured to rotate the drive shaft. The drive shaft may extend through a hull bottom of the hull and the propeller assembly may be positioned forward of a transom of the hull and beneath the hull bottom. The propeller may include a central hub having a hole capable of having the drive shaft inserted therethrough. The thrust bearing may be located in the hole of the central hub and secured to the propeller such that the thrust bearing and the propeller form a unified assembly.

The invention relates to a propeller arrangement (1) having a propeller part (2) and a shaft part (3), in particular for an underwater vacuum cleaner, wherein the propeller part (2) and the shaft part (3) are coaxially connected to one another via a latching connection (4), which latching connection (4) has at least two latching fingers (5) which can move elastically in a latching direction (R) radially with respect to an axis of rotation (1a) of the propeller arrangement (1), and a latching opening (6) for accommodating the latching fingers (5).

The latching fingers (5) are formed integrally with the shaft part (3). The latching fingers (5) and the latching opening (6) form—in and/or against a direction of rotation (P) of the propeller arrangement (1)—a positive connection. This enables an easily detachable rotary connection between the propeller part (2) and the shaft part (3) in a simple manner.

The invention relates to a propeller arrangement (1) having a propeller part (2) and a shaft part (3), in particular for an underwater vacuum cleaner, wherein the propeller part (2) and the shaft part (3) are coaxially connected to one another via a latching connection (4), which latching connection (4) has at least two latching fingers (5) which can move elastically in a latching direction (R) radially with respect to an axis of rotation (1a) of the propeller arrangement (1), and a latching opening (6) for accommodating the latching fingers (5).

The latching fingers (5) are formed integrally with the shaft part (3). The latching fingers (5) and the latching opening (6) form—in and/or against a direction of rotation (P) of the propeller arrangement (1)—a positive connection. This enables an easily detachable rotary connection between the propeller part (2) and the shaft part (3) in a simple manner.

A propeller apparatus of a ship propulsion machine includes a tubular member inserted into an insertion hole so as to be movable in a circumferential direction with respect to a hub. First concave portions arranged in a circumferential direction are formed in an outer peripheral surface of the tubular member. Second concave portions arranged in the circumferential direction so as to respectively face the first concave portions are formed in an inner peripheral surface of the insertion hole. Each of the elastic bodies has a spherical or columnar shape, a first portion of each of the elastic bodies is disposed in each of the first concave portions, a second portion of each of the elastic bodies is disposed in each of the second concave portions, and the elastic bodies are rotatably held between the first concave portions and the second concave portions facing each other.