Motor vehicles – Including one or more ski-like or runner members – With at least one surface-engaging propulsion element
Patent
1992-09-18
1994-03-15
Focarino, Margaret A.
Motor vehicles
Including one or more ski-like or runner members
With at least one surface-engaging propulsion element
180143, 91371, B62D 5083, F15B 908
Patent
active
052939545
ABSTRACT:
A power steering control valve including relatively rotatable inner and outer valve members. A power steering resistance control system resists relative rotation between the inner and outer valve members with a force which varies as a function of variations in vehicle speed. The power steering resistance control system includes a force transmitting member which is disposed adjacent to one end of an outer valve member. A spring force is applied against the force transmitting member urging it in a first direction along the axis of rotation of the valve member. Fluid pressure is applied against the force transmitting member to urge it in the first direction. A speed responsive control unit is operable to vary the fluid pressure applied against the force transmitting member as a function of variations in vehicle speed. The power steering resistance control system also includes a means for preventing an increase in the resistance to relative movement between the valve members as the vehicle speed increases when there is no relative movement between the valve members.
REFERENCES:
patent: 4811806 (1989-03-01), Lang
patent: 4819545 (1989-04-01), Dymond
patent: 5046574 (1991-09-01), Goodrich et al.
patent: 5058696 (1991-10-01), Prebay et al.
patent: 5070956 (1991-12-01), Pawlak et al.
patent: 5070957 (1991-12-01), Harkrader et al.
patent: 5070958 (1991-12-01), Goodrich et al.
patent: 5092418 (1992-03-01), Suzuki et al.
patent: 5135068 (1992-08-01), Emori et al.
Focarino Margaret A.
Mattix C.
TRW Inc.
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