Universal link bar operator and actuator for rotating blade air,

Details Universal link bar operator and actuator for rotating blade air, Universal link bar operator and actuator for rotating blade air,

1980-05-30

1982-07-13

Nilson, Robert G.

Fluid handling

Systems

Dividing into parallel flow paths with recombining

251 58, 251280, F24F 1314, F16K 122

Patent

active

043389678

ABSTRACT:
A universal operator is disclosed for rotating blade air, smoke and fire dampers, said dampers comprising a frame and a plurality of interconnected blades within said frame, said interconnection being in the form of a link bar which adapts all of said blades to open and close as a unit. The operator comprises a pair of pivotally connected members to form a knee-action joint which in turn is pivotally connected both to the damper frame and to said link bar. The operator also comprises stall type actuation means for selectively acting through the operator to control the degree of blade opening and bias means to return said blades to their normal operating position whenever said actuation means is disengaged.

REFERENCES:
patent: 1487861 (1924-03-01), Keenan
patent: 2827259 (1958-03-01), Kindt
patent: 3062232 (1962-11-01), McGay
patent: 3182951 (1965-05-01), Spencer
patent: 3510101 (1970-05-01), Burtis
patent: 3955792 (1976-05-01), Cho
patent: 3996952 (1976-12-01), Root

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