Hydraulic assistance device

Details Hydraulic assistance device Hydraulic assistance device

1985-01-14

1987-12-01

Hershkovitz, Abraham

Power plants

Pressure fluid source and motor

Pulsator

60566, 91460, 91524, B60T 1120

Patent

active

047095504

ABSTRACT:
The hydraulic assistance device incorporates a casing (10) enclosing first and second sliding components (18, 20) arranged in line, the first component (18) being capable of being displaced under the effect of the displacement of a pushrod (34) and the second component being capable of being displaced through the intermediary of a hydrostatic connection, and associated with each component (18, 20) is a valve mechanism (36, 46) in a respective hydraulic circuit between a source of fluid under pressure and a respective braking circuit (I, II), characterized in that the first and second components (18, 20) each constitute a piston sliding in a bore (14) in the casing (10) and each encloses a valve assembly (26, 40; 36, 46) each controlled by a plunger (30, 44), the plunger (30) of the first valve assembly (26, 36) being actuated by the pushrod (34), and the plunger (44) of the second valve assembly (40, 46) being actuated by the hydrostatic connection between the two pistons (18, 20).

REFERENCES:
patent: 2799140 (1957-07-01), Osborne
patent: 3659421 (1972-05-01), Wilson et al.
patent: 3827242 (1974-08-01), Belart
patent: 3918765 (1975-11-01), Hayashida
patent: 4441319 (1984-04-01), Brown
patent: 4534171 (1985-08-01), Leiber

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