Control device for hydrostatic power assisted steering

B - Operations – Transporting – 62 – D

Patent

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138/57

B62D 5/083 (2006.01) B62D 5/093 (2006.01) B62D 5/097 (2006.01)

Patent

CA 1264269

Abstract A control device for hydrostatic power assisted steering, particu- larly for vehicles, comprises a measuring motor (10) and a valve arrangement (14) with an outer rotary slide (16) and an inner rotary slide (17). A cardan shaft connects the gear (12) of the measuring motor gear train to rotate with the outer slide (16). The axial length of the gear train (11, 12) is at least approxi- mately equal to the length of the cardan shaft (42). The one head (43) of the cardan shaft (42) is connected by way of a first coupling (44) to a part of the outer slide (16) adjacent to the gear train (11, 12). For the purpose of increasing the depth (t) of at least part of the control grooves (28, 32, 34, 35), the cross-sectional projection of the inner slide (17) overlaps the cross-section of this head (43) in the region of its largest diameter (D). This permits the control device to pass larger flow quantities without an excessive rise in the pressure drop.

501943

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