Motor vehicles – Including one or more ski-like or runner members – With at least one surface-engaging propulsion element
Patent
1990-06-15
1991-09-10
Bertsch, Richard A.
Motor vehicles
Including one or more ski-like or runner members
With at least one surface-engaging propulsion element
180149, 91375A, B62D 5083
Patent
active
050465740
ABSTRACT:
An automotive power steering gear includes a stub shaft, a pinion head, a torsion bar between the stub shaft and pinion head, and a detent reaction arrangement for varying the threshold manual effort required to initiate power assist and/or for varying the relationship between manual effort and power assist. The detent reaction arrangement includes an annular flange and tubular sleeve on the pinion head, a plurality of radial sockets in the tubular sleeve, a plurality of detent elements in the sockets, a stem on the stub shaft extending into the tubular sleeve, detent grooves on the stem engaged by the detent elements, and an annular collar on the sleeve with a frustoconical wedge engaging the detent elements. A pressure chamber between the annular flange and the collar is connected to a power steering pump so that boost pressure, or a fraction thereof modulated as a function of vehicle speed, reacting against the collar increases the resistance to relative angular displacement between the stub shaft and the pinion head.
REFERENCES:
patent: 3787136 (1974-01-01), Steiner
patent: 4034825 (1977-07-01), Adams
patent: 4381698 (1983-05-01), Hasegawa et al.
patent: 4381799 (1983-05-01), Sato et al.
patent: 4465101 (1984-08-01), Hasegawa
patent: 4759420 (1988-07-01), Schipper, Jr. et al.
patent: 4774847 (1988-10-01), Breitweg
patent: 4793433 (1988-12-01), Emori et al.
patent: 4819545 (1989-04-01), Dymond
GB 2199-000-A Abstract Only.
Goodrich, Jr. Stanley R.
Melvin Michael C.
Bertsch Richard A.
General Motors Corporation
Johnson Victor E.
Schwartz Saul
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