Abstract:
The power steering system (1) comprises a first steering mechanism (11) designed to control the steering of at least one of the wheels (8a) of the steered axle (7) and comprising: - a mechanical transmission of the movement from a steering wheel (12) of the vehicle to said wheel (8a); - a first actuator (26) controlled by a parameter related to the steering wheel movement and capable of providing a steering assistance effort to said wheel (8a). The power steering system further comprises a second steering mechanism (28) which includes a second actuator (29) capable of providing a steering assistance effort to at least one of the wheels of the same axle, the second actuator having: - a housing (30) which is secured to the axle; - a first and a second piston rods (35, 36) able to slide through the housing (30) and extending, on opposite sides, beyond the housing (30), with said piston rods being substantially parallel to said axle (7).
Abstract:
An apparatus (10) for use in turning steerable vehicle wheels (14, 16) includes a steering member (12) which is linearly movable relative to the vehicle to effect turning movement of the steerab!e vehicle wheels. A pinion (28) is disposed in meshing engagement with a rack portion (30) of the steering member (12). A steering column (22) is connected with the pinion (28) and with a vehicle steering wheel (20) such that rotation of the steering wheel results in linear movement of the steering member. An electrically powered steering unit (40) is connected to the steering member (12) for providing steering fee! to the operator. A hydraulic power steering motor (60) mechanically connected to the steering member provides steering assist to the steerable wheels (14, 16).
Abstract:
A retro-fittable power steering system for a vehicle; said system including an actuator acting on a component of the steering system of a 9aid vehicle downstream of the steering box of said steering system; said system characterised in that said power steering system is activated manually under driver control; said system further characterised in that original steering components of said vehicle remain un-modified.
Abstract:
A forklift truck steerable along at least two opposite directions of travel by a hydraulic circuit includes at least one hydraulic cylinder (22) coupled to at least one steerable ground-engaging wheel (18) and a driver's steering wheel (20) for controlling the supply of hydraulic fluid under pressure selectively to the full bore or piston rod side of the cylinder. The hydraulic circuit also includes a diverter valve (32) which is switched over when the truck is driven in one of the two directions to cause the truck to steer in the same direction as the steering wheel is turned in whichever of the opposite directions the truck is travelling.
Abstract:
A riding lawn mower is provided that has an engine, a device that requires control and a vacuum actuated control mechanism for controlling the device. The vacuum actuated control mechanism includes a vacuum actuator having first and second chambers separated by a movable membrane, first connecting means for operatively connecting the vacuum actuator to the device, vacuum means for providing a vacuum to the vacuum actuator, activating means for selectively activating the vacuum actuator and securing means for securing the vacuum actuator in place. The securing means also secures the device in place.
Abstract:
The invention relates to a power steering system for non-railborne motor vehicles, wherein the servomotor (41) assumes both the function of servo-assisted resetting of the steering to a straight-ahead position in addition to the function of a steering damper.