Motors: expansible chamber type – Working member position feedback to motive fluid control – Plural input signal means for single motor valve
Patent
1995-06-07
1997-03-18
Ryznic, John E.
Motors: expansible chamber type
Working member position feedback to motive fluid control
Plural input signal means for single motor valve
91376R, B60T 1357, B23P 1300
Patent
active
056112572
ABSTRACT:
A pneumatic brake booster with a booster housing part includes a vacuum chamber and a working chamber separated therefrom by a movable wall, and a valve body part including a control valve assembly and an electromagnet assembly. The control valve assembly can be actuated both by an actuation rod as well as by the electromagnet assembly, in order to make connections between the vacuum chamber and the working chamber, or between the working chamber and the ambient atmosphere. To improve the heat dissipation and to simplify the assembly the valve body part comprises several separate portions at least the first portion of the valve body part being at least partially designed as a magnetic return of the electromagnet assembly and is coupled with the second portion of the valve body part.
REFERENCES:
patent: 5172964 (1992-12-01), Levrai et al.
patent: 5437217 (1995-08-01), Castel et al.
patent: 5483866 (1996-01-01), Schluter
Lucas Industries Public Limited Company
Ryznic John E.
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