Hydrostatic power steering device for fast steering

Motor vehicles – Steering gear – With fluid power assist

Reexamination Certificate

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Details

C060S384000

Reexamination Certificate

active

06863147

ABSTRACT:
Hydrostatic power steering device comprising a source of pressurized fluid, a cylindrical barrel-type distributor the elements of which are connected elastically together, and of which the inner element, the so called spindle, is connected to the steering wheel; the distributor being arranged to assume a central position, the so-called neutral position, in which it directly short-circuits, to discharge, the fluid originating from the source of pressurized fluid, and two positions, symmetrical about the central position, in which the distributor, via a dispenser of orbital type the rotor of which is rigidly connected to the steering wheel shaft and to the spindle, feeds the fluid to one and respectively to the other of the chambers of a hydraulic actuator connected to the steering wheel; the device also comprises an auxiliary conduit for feeding the pressurized fluid to the cylindrical distributor; a slide valve operable by the driver to feed said auxiliary feed conduit when desired; a barrel locking system operated by the pressure of the fluid present in said auxiliary feed conduit; and holes and grooves in the barrel and in the spindle to directly connect said auxiliary feed conduit to one or other chamber of the actuator without passing through the dispenser rotor.

REFERENCES:
patent: RE25126 (1962-02-01), Charlson
patent: 3801239 (1974-04-01), Larson
patent: 3819307 (1974-06-01), Uppal
patent: 3960234 (1976-06-01), Morgan
patent: 4033377 (1977-07-01), Johnson
patent: 4050474 (1977-09-01), Morgan
patent: 4109679 (1978-08-01), Johnson
patent: 5165496 (1992-11-01), Pedersen et al.
patent: 5785144 (1998-07-01), Cakmaz et al.
patent: 6065561 (2000-05-01), Howard
patent: 6513620 (2003-02-01), Igawa et al.
patent: 19935021 (2000-02-01), None
patent: 1366969 (2003-03-01), None
patent: 1355955 (1974-06-01), None
patent: 1524707 (1978-09-01), None
patent: 2341159 (2000-03-01), None

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