Motors: expansible chamber type – Working member position feedback to motive fluid control – Follower type
Patent
1979-07-26
1982-03-09
Chambers, A. Michael
Motors: expansible chamber type
Working member position feedback to motive fluid control
Follower type
251324, 60547R, 403143, F15B 900, F16K 100
Patent
active
043183352
ABSTRACT:
Pressure control valves for mechanically controlled power brake units include a control casing with an approximately cylindrical guide member. The control casing houses a valve piston to which a piston rod extending through the guide member and projecting therefrom is secured. Prior to the mounting of the power brake unit, the piston rod may be subjected to lateral knocks which has to be absorbed by the control casing. Under increased knock impact, the result is frequently a damaged control casing. In accordance with the present invention this is overcome by arranging the piston rod shank which is adjacent to the end of the piston rod carried in the valve piston, at least partially within a bore of the valve piston and to dimension the radial distance between the bore and the piston rod shank such that the valve piston serves as a stop to limit the crosswise or radial movement of the piston rod.
REFERENCES:
patent: 985013 (1911-02-01), Desmond
patent: 3385616 (1968-05-01), Gottschald
patent: 4195484 (1980-04-01), Mathues et al.
Geiss Wolfgang
Wiegand Hans-Jurgen
Chambers A. Michael
Hill Alfred C.
IT&T Industries, Inc.
O'Halloran John T.
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