High speed pneumatic servo actuator with hydraulic damper

Details High speed pneumatic servo actuator with hydraulic damper High speed pneumatic servo actuator with hydraulic damper

1994-03-04

1995-10-17

Ryznic, John E.

Motors: expansible chamber type

Working member position feedback to motive fluid control

Electrical input and feedback signal means

92 8, 92 12, F15B 1316, F15B 1522

Patent

active

054580471

ABSTRACT:
A hydraulic damper for a high speed actuator is provided to bring the actuator to rest with minimum oscillation around a target position. The hydraulic damper comprises a hydraulic circuit to communicate with the actuator over its entire positional range for the purpose of dampening a sudden stop of the actuator about a target position. The actuator is connected by a cable to a reel, the reel being connected to a shaft movement of the actuator produces rotation of the shaft. The shaft is also connected to a hydraulic motor which pumps hydraulic fluid through a hydraulic damper too, in effect, dampen the movement of the actuator.

REFERENCES:
patent: 2821172 (1958-01-01), Randall
patent: 2832200 (1958-04-01), Grout et al.
patent: 2891514 (1959-06-01), Moeller
patent: 3017865 (1962-01-01), Frantz et al.
patent: 3128673 (1964-04-01), Moore, Jr.
patent: 3176801 (1965-04-01), Huff
patent: 3698826 (1972-10-01), Henderson
patent: 3894477 (1975-07-01), Tomikawa
patent: 4528894 (1985-07-01), Crosby
patent: 4765225 (1988-08-01), Birchard

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