Hydraulic ratio changing booster

Details Hydraulic ratio changing booster Hydraulic ratio changing booster

1979-02-22

1981-02-03

Maslousky, Paul E.

Motors: expansible chamber type

Constantly applied motive fluid with controlled venting

Fluid vented through working member

91391R, 91431, 91460, E15B 1310, F15B 1702

Patent

active

042481350

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 change, providing a smooth transition from a high ratio toward a 1:1 ratio as the booster shifts to manual operation from hydraulic power operation. These are three booster modifications shown.

REFERENCES:
patent: 3699680 (1972-10-01), Shellhause
patent: 3831491 (1974-08-01), Thomas
patent: 3967538 (1976-07-01), Thomas
patent: 3988967 (1976-11-01), Orzel
patent: 4007665 (1977-02-01), Orzel
patent: 4135435 (1979-01-01), Adachi

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