Motors: expansible chamber type – Fluid supply through diverse paths to single expansible chamber – Activation of one path disables second path
Patent
1985-10-16
1987-11-17
Garrett, Robert E.
Motors: expansible chamber type
Fluid supply through diverse paths to single expansible chamber
Activation of one path disables second path
91434, 91460, 60555, 137 85, F15B 1304
Patent
active
047065451
ABSTRACT:
In a brake valve of the type in which a given ratio is maintained between a master pressure developed by a brake pedal and an actual brake pressure, an arrangement is provided for continuous, rather than stepwise, adjustment of this ratio. The brake valve includes a control piston which is subjected to the master pressure and which, by the displacement thereof, opens and closes connecting channels between an accumulator containing a primary pressure fluid and a brake, as well as between the brake and a fluid collecting tank. The control piston and a measurement piston apply counter forces to the arms of a balance beam whose lever ratio determines the degree of feedback of the instantaneous brake pressure to the control piston. A stop is provided in the path of the axis of the control piston, which limits the stroke of the piston, to prevent the overloading of the balance beam during abnormally high braking pressures such as occur, for instance, during panic braking.
REFERENCES:
patent: 2720954 (1955-10-01), Pratt
patent: 2898929 (1959-08-01), Williams
patent: 3094843 (1963-06-01), Martin
patent: 3698414 (1972-10-01), Nagata et al.
Gossl Dietmar
Muncke Ludwig
Wittich Kurt
Garrett Robert E.
Mannesmann Rexroth GmbH
Williamson Mark A.
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