Abstract: A steering system for boats includes a control member of the steering wheel type, lever type or the like connected to a driving shaft of a transmission composed of at least two transmission elements dynamically engaged one with the other, of which one is an input and the other one an output elements. The output element drives a member transferring the motion of the control member to an operating unit, such that a movement/rotation of the control member is transmitted to the transfer member through such transmission. Moreover, at least the input element is produced from a material obtained by a sintering process.

Abstract: Disclosed herein is a steering apparatus of a small ship such as a motorboat, which prevents abrasion and noise caused by a gap between a rotary cover and a rotary plate and maximizes steering handle rotation prevention effect.

Abstract: Disclosed herein is a steering apparatus of a small ship such as a motorboat, which prevents abrasion and noise caused by a gap between a rotary cover and a rotary plate and maximizes steering handle rotation prevention effect.

Abstract: A steering handle apparatus for a watercraft provided with a steering shaft comprises a housing attached to the body of the watercraft, a tube member supported on the housing so as to be able to tilt back and forth around a pivot portion and including a gear portion and a guide hole through which the steering shaft is passed, a locking member including a fitting portion movable between a locking position for engagement with the gear portion and an unlocking position for disengagement from the gear portion, and an operating member including a retaining portion for moving the locking member. The operating member is operable between an up position in which the locking member is moved to the unlocking position and a down position in which the locking member is moved to the locking position.

Abstract: A fluid power apparatus is connected to a pressurized fluid supply and a conventional helm pump controlled by the helm of a vessel to shift the rudder. The apparatus comprises an actuator cylinder connectable to the rudder, and a servo cylinder and a main valve connected to the helm pump to pass fluid therebetween and between the actuator cylinder. The actuator cylinder and servo cylinder have respective bodies and piston rods, and portions of the servo cylinder and actuator cylinder are connected together for concurrent simultaneous movement along respective longitudinal axes. Valve shifting structure is responsive to a change in fluid signal from the helm pump applied to the servo apparatus. Fluid diverting structure is responsive to a threshold supply pressure so as to actuate the valve to stop flow of supply fluid when supply pressure drops below the threshold pressure.

Abstract: The invention is to a power steering system for a marine vehicle having an operator actuable steering helm and a propulsion unit, including a steering arm, to effect steering movement thereof about a steering axis. The system is interposed between the steering helm and the propulsion unit and mounted remote from the propulsion unit, and further is hydraulically actuated in response to operative movement at the steering helm. A gear drive means, actuated in response to steering actuation at the helm, is operably connected to power steering assist means, comprising a hydraulic cylinder-piston assembly and hydraulic fluid source. Actuating means for regulating the flow of hydraulic fluid through the power steering assist means is operably connected to the gear drive means. An actuable output means, preferably a gear output means is operably connected to the power steering assist means for operative movement in response to the actuating means.

Abstract: A fluid power apparatus is connected to a pressurized fluid supply and a conventional helm pump controlled by the helm of a vessel to shift the rudder. The apparatus comprises an actuator cylinder connectable to the rudder, and a servo cylinder and a main valve connected to the helm pump to pass fluid therebetween and between the actuator cylinder. The actuator cylinder and servo cylinder have respective bodies and piston rods, and portions of the servo cylinder and actuator cylinder are connected together for concurrent simultaneous movement along respective longitudinal axes. Valve shifting structure is responsive to a change in fluid signal from the helm pump applied to the servo apparatus. Fluid diverting structure is responsive to a threshold supply pressure so as to actuate the valve to stop flow of supply fluid when supply pressure drops below the threshold pressure.

Abstract: A steering system for a boat, comprising a steering unit, at least one push-pull control cable and a pinion-rack unit. The pinion-rack unit has a rack casing having at least one inner cable guiding portion along at least one side wall thereof, a cable guide for outwardly guiding smoothly an inner cable of the push-pull control cable from the inner cable guiding portion, an end portion of the inner cable connected with the end portion of the rack, and a pinion meshed with the rack. The steering system can be easily mounted on a boat, does not require a wide space for mounting and for arranging a push-pull control cable, and can be applied to several types of boats, e.g. a boat which has two or more operator's seats.