Motors: expansible chamber type – Working member position feedback to motive fluid control – Valve locking means
Patent
1981-11-30
1984-02-28
Garrett, Robert E.
Motors: expansible chamber type
Working member position feedback to motive fluid control
Valve locking means
91380, 91382, F15B 910, F15B 1316
Patent
active
044336136
ABSTRACT:
A power steering system for motor vehicles, wherein a steering nut, connected to a steering worm in such a manner that the steering worm is driven thereby, is rotatably and axially non-displacably mounted in a working piston and is also provided with a control arm passing through both a radial recess in a working piston and a radial opening in a cylinder housing that receives the working piston. An end of the control arm which is radially outermost with respect to an axis of the piston actuates a spool valve for adjusting the working pressure. Two corresponding followers are provided for defining the end stroke positions of the working piston. The followers are mutually engagable to lower or shut off a working pressure in the system. One of the followers is disposed opposite the working piston relative to the piston axis and the other is located opposite the cylinder housing relative to the cylinder axis with a zero motion. The followers having a zero motion with respect to the piston axis on the control arm and followers which have a zero motion with respect to the cylinder axis on a limiting housing part are so disposed that a mutual engagement of the corresponding followers results in actuation of the spool valve.
REFERENCES:
patent: 3017862 (1962-01-01), Freist
patent: 4170925 (1979-10-01), Katz et al.
patent: 4189023 (1980-02-01), Karcher et al.
Abt Reinhold
Blum Walter
Bordovsky Jaromir
Bradley Abram M.
Daimler-Benz Aktiengesellschaft
Garrett Robert E.
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