Hydraulic ratio-changing booster with hydraulic lock

Details Hydraulic ratio-changing booster with hydraulic lock Hydraulic ratio-changing booster with hydraulic lock

1979-02-22

1980-12-09

Maslousky, Paul E.

Motors: expansible chamber type

With alternative manual actuation of load

Alternate pedal positions

91431, 91460, F15B 1310, F15B 1702

Patent

active

042377722

ABSTRACT:
A hydraulic power booster system in which a hydraulic power brake booster has hydraulic ratio changing mechanisms. The ratio is established by trapping hydraulic fluid in a chamber with an input piston having a larger effective area than an output piston forming movable chamber walls. A ratio piston or sleeve exposed to booster power pressure and the trapped pressure is moved upon power runout, causing the booster ratio to change as the ratio of these pressures changes, providing a smooth transition from a high ratio toward a 1:1 ratio as the booster shifts to manual operation from hydraulic power operation. A trapped hydraulic fluid link is established between the input piston and the booster output member for manual operation. These are two booster modifications shown.

REFERENCES:
patent: 3733968 (1973-05-01), Bach
patent: 3831491 (1974-08-01), Thomas
patent: 3896620 (1975-07-01), Flory
patent: 3915066 (1975-10-01), Thomas et al.
patent: 3921502 (1975-11-01), Lauer et al.

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