Fail-fixed electrohydraulic servosystem

Details Fail-fixed electrohydraulic servosystem Fail-fixed electrohydraulic servosystem

1980-01-28

1983-03-08

Hershkovitz, Abraham

Motors: expansible chamber type

With correlated control of motive fluid and locking means

By electrical control means

91 44, 91387, 91417R, 137 85, F15B 1526

Patent

active

043757804

ABSTRACT:
A fail-fixed electrohydraulic servosystem in which a variation from a predetermined range of electrical input to the servosystem results in the output of the system being fixed in position. Fixing-in-position is accomplished by either hydraulically or mechanically locking a linkage to the output arm of the servosystem. Provision is also made for controlled drift and manual adjustment of the output after it is fixed in position.

REFERENCES:
patent: 1085964 (1914-02-01), Briggs
patent: 2832200 (1958-04-01), Grout
patent: 2889895 (1959-06-01), Snow
patent: 3034483 (1962-05-01), Rasmussen
patent: 3122972 (1964-03-01), Rasmussen
patent: 3270621 (1966-09-01), De Ridder
patent: 3361034 (1968-01-01), Rothrock
patent: 3492921 (1970-02-01), Ray
patent: 3505929 (1970-04-01), Coppola
patent: 3680723 (1972-08-01), Seaberg
patent: 3753350 (1973-08-01), Nott
patent: 3898912 (1975-08-01), Wills
patent: 3922955 (1975-12-01), Kast
patent: 4276809 (1978-01-01), Kast

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