Motor vehicles – Including one or more ski-like or runner members – With at least one surface-engaging propulsion element
Patent
1987-06-02
1989-06-13
Marmor, Charles A.
Motor vehicles
Including one or more ski-like or runner members
With at least one surface-engaging propulsion element
180143, B62D 509
Patent
active
048383767
ABSTRACT:
A power steering device for parking for automotive vehicles has a left-turn switch (11) and a right-turn switch (12) which are associated with the steering column (13) which, in case of the steering wheel's (14) not being operated, adopt a first position and which, in case of a left or a right turn of the steering wheel (14), adopt a second position and act on associated left and right turning angle valves (17, 18) via an AND-gate (15, 16) associated with each. Upon actuation of the left-turn switch or of the right-turn switch (11, 12) a hydraulic pressure source is connected correspondingly to a hydraulic energy-generating device (34) assisting the steering system and acting on the steering linkage (37). The steering-column (13)-and-steering-wheel (14) arrangement consists of two parts (13, 14) twistable relative to each other in a limited manner upon a turn of the steering wheel (14). A linking element (20) adjustable between two positions permits the two parts (13, 14) to be coupled nonrotatably in the mid-position by means of a positive connection. The speed-AND-gate (21) actuates a coupling relay (22), which acts on the linking element (20) in such a manner as to ensure that, in case of the release switches (19, 23) being actuated, the parts (13, 14) will be uncoupled. The left-turn and right-turn switches (11, 12) are only actuatable when the parts (13, 14) are uncoupled and when there is a relative torsion by an amount lying within the narrowly limited range.
REFERENCES:
patent: 1863567 (1932-06-01), Fisher
patent: 2356492 (1944-08-01), Smith
patent: 2925741 (1960-02-01), Winkelmann
patent: 2930247 (1960-03-01), Zinn
patent: 3983953 (1976-10-01), Bayle
patent: 4598787 (1986-07-01), Drutchas
patent: 4616727 (1986-10-01), Kircher et al.
Drott Peter
Klein Hans-Christof
Alfred Teves GmbH
Marmor Charles A.
Raden James B.
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