Cam Gears Limited

Frederick John Adams

A hydraulic power assisted steering system includes a source of pressure fluid fed to a power assist motor. Control of the steering assistance pressure is provided by a valve having two valve elements which are relatively rotatable away from a centered position, subject to restraint imposed by an elastic torque rod. The pressure fluid source has its output branched, one branch supplying the steering assistance motor through and subject to the control of the rotatable valve, and the second branch supplying detent means adapted to increasingly resist relative rotation of the two valve elements in response to increases in pressure of the fluid source. The fluid source pressure increases with increasing relative rotation of the valve elements away from their centered position. Increasing fluid source pressure ultimately effects interlocking of the valve elements when the source pressure reaches a predetermined value. At that point, the torque bar, in effect, ceases being sensitive to increasing torque applied by the driver.

Rotary valve for power steering with hydraulic reaction

A speed control device includes a pair of rotatable plates having power transmission rollers positioned in a toroidal track formed between the plates by an annular groove in the opposed face of each plate. Each plate is received within a rotatable housing to which the associated plate is keyed so the plate and associated housing must rotate with each other but leaving the plate axially movable relative to its housing. One housing is driven by an engine so its plate is a driving plate which drives the other, driven plate by means of the rollers. This drives the driven plate housing which is a driving housing used to drive an auxilliary device. The rollers are pivotably mounted on an axially immovable support. Biasing means responsive to rotation speed displaces the plates which pivots the rollers thereby changing the radial location of contact between the rollers and the plates. This changes the ratio of angular velocity at which the driven plate is driven relative to the driving plate.

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Campton, undefined

Frederick John Adams