33results about "Propeller parts" patented technology

A dual drive system for providing motive power to a watercraft has a frame configured for connecting to the watercraft and a drive assembly connected to the frame. The drive assembly has a manual drive mechanism configured for receiving mechanical input from a user, a motor drive mechanism configured for receiving mechanical input from a motor, a driveshaft having a first end in selective engagement with one of the manual drive mechanism and the motor drive mechanism and a second end in engagement with a propeller, and a drive selector for selectively engaging the manual drive mechanism or the motor drive mechanism with the driveshaft based on a position of the drive selector between first and second positions. In the first position, the drive selector engages the manual drive mechanism with a driveshaft. In the second position, the drive selector engages the motor drive mechanism with the driveshaft.

An outboard motor includes a lower unit and an upper unit that is attachable to the stern of a boat, with the upper unit and lower unit configured to tilt together about a transverse tilt axis. The upper unit includes an engine, a transmission assembly and a drive shaft and the lower unit includes a lower unit housing and a propeller shaft that is connected to the drive shaft. The lower unit housing is configured to pivot relative to the upper unit, about a steering axis that extends coaxially with the drive shaft. The steering axis intersects the propeller axis at an obtuse angle.

The invention relates to a folding propeller for an above-water platform. The folding propeller comprises a beam, a fixing base, a fixing block, a motor rod and a propeller motor. The beam is positioned in the rear of the above-water platform, a fixing mechanism is arranged on the beam and can be connected with the fixing block, the fixing base is positioned on the inner side face of the beam and is connected with the fixing block through an overturning arm, the motor rod is connected to the fixing block through a movable rotating shaft and comprises an upper arm and a lower arm, a steering motor is arranged in the upper arm, the double-blade propeller motor is mounted at the tail end of the motor rod, and the lower arm is rotated by the steering motor, so that the direction of the propeller motor can be adjusted. When in a storage state, the folding propeller is folded to be stored in a chamber of the above-water platform; when in a working state, the folding propeller can be powered on to be in operation after the fixing block is overturned on the beam to be connected with the fixing mechanism, then the motor rod is overturned to be downward vertically and the propeller motor is adjusted to face the rear by the steering motor. The folding propeller for the above-water platform is easy in folding storage, convenient to operate, high in safety and particularly applicable to power-driven propelling of portable above-water platforms.

A watercraft configured for use in a body of water is provided including a deck and at least one propulsion mechanism mounted at a first end of the deck. The at least one propulsion mechanism is configured to move the watercraft within the body of water. A man lift movable between a lowered position and a raised position is mounted to the deck. The man lift is configured to raise a person a vertical distance above the deck. Mounting brackets are arranged adjacent a first and second side of the deck. The mounting brackets are translatable between a retracted position and a deployed position. In the deployed position, the mounting brackets extend perpendicularly from the first side and the second side, respectively. An inflatable pontoon is removably coupled to each of the mounting brackets.

The invention relates to the field of aquatic rescuing, in particular to an aquatic rescuing device. The aquatic rescuing device comprises a main body, a propulsion device, a direction control device, a sensor, an attitude regulating device, an infrared camera, a wireless communication device, N wireless relay devices, a life saving device, a control system and a remote controller, wherein the attitude regulating device is used for accurately adjusting the attitude of the main body and assisting other devices to complete the accurate steering, the accurate lifting and the accurate hanging of the main body; the wireless relay devices are used for performing wireless relay when the distance is far or the communication environment is poor; the life saving device is used for fixing a rescuing target; the attitude regulating device comprises four attitude regulating electric motors and four attitude regulating propellers; the four attitude regulating electric motors are separately and uniformly mounted on two sides of the main body; and the wireless relay device can be released by the main body. The aquatic rescuing device disclosed by the invention can regulate the movement direction and the attitude accurately and perform hovering, many rescuing manners including cuddling, towing armpits, holding by hands and the like are provided, and the problems that the aquatic rescuing device is low in rescuing efficiency, narrow in application scope and poor in stability are solved.

A multi-stage watertight chamber is provided in this invention. The multi-stage watertight chamber comprises a first rotary seal, a second rotary seal, a first housing, a second housing, and an integrated shaft. The first and second rotary seals withstand external pressure to make sure watertight status is achieved when the integrated shaft rotates. The first housing forms a first watertight chamber. The integrated shaft protrudes through the first housing via the first rotary seal. The second housing is placed outside and adjacent to the first housing and forms a second watertight chamber. The first watertight chamber contains devices that must be isolated from liquid outside the first and second housings. The second watertight chamber is used to store water seeped through the second rotary seal and avoid causing damage directly to components and apparatus inside the first watertight chamber.

A marine propulsion assembly includes a propeller having a threaded hub whose threads are used for engaging with a drive shaft. The drive shaft includes both a first set of threads and second set of threads such that the first set of threads are used to engage with a keeper nut and a second set of threads are used to engage within the propeller hub. The first set of threads are configured to be opposite the direction of propeller rotation for preventing rotation of the keeper nut while the second set of threads are configured opposite the direction of rotation of the propeller to prevent the propeller from loosening on the drive shaft. The drive shaft further includes a tapered section for providing a stop to the propeller when engaging with the second set of threads.

A method is provided for manufacturing a rotor body of a Magnus-type rotor. The method includes providing a plurality of arcuate panels, wherein each of the panels has an arc-length less than a predetermined circumference of the rotor body. The method further includes positioning at least three such arcuate panels in mutual edge-wise abutment to form circumferentially a hollow cylindrical loop, wherein longitudinal edges of adjacent panels are mutually attached to each other. The method further optionally includes co-axially stacking one above another at least two loops of substantially similar diameter. The method further includes connecting edges of adjacent loops to define the rotor body of a predetermined height.

The present invention relates to a special travelling device for a water surface pollution floater cleaning robot. The special travelling device comprises a frame, a spiral propelling device, a steering device, a power supplementary device, a filter screen, inflators and fixing buckles. The spiral propelling device is positioned at the bottom of the middle of the frame, the spiral propelling device is simple and convenient to control, propelling force is large, and the propelling effect is good. The steering device is positioned at the rear side end of the frame, the steering effect of the steering device is achieved due to the fact that three steering pawls rotate in the same direction, and steering is fast and flexible. The power supplementary device is positioned right above the steering device, and when the weight of water surface pollution floaters born by the special travelling device is too large or movement power is insufficient, the effect of secondary supplementation of the movement forward power can be achieved by the power supplementary device. The filter screen is installed inside an upper layer of a semi-cylindrical housing structure of the frame, the inflators are symmetrically positioned at left and right sides of the frame respectively, and the inflators and the frame are connected through the fixing buckles.