Expansion and contraction drive apparatus

Details Expansion and contraction drive apparatus Expansion and contraction drive apparatus

1979-05-08

1981-07-07

Valenza, Joseph E.

Liquid purification or separation

Structural installation

Flume stream type

198517, E02B 508

Patent

active

042773350

ABSTRACT:
The present invention relates to an expansion and contraction system of a plurality of arms, and for example to an expansion and contraction system applicable to a rake arm of a dirt remover for discharging dust from the effluent of an aqueduct. The expansion and contraction system of the arm comprises a plurality of relatively slidably assembled pipes having different diameters respectively and a plurality of moving means each provided with a chain, such as an endless tension member and the like, extended between a pair of sprockets, such as guide wheels and the like, each moving means being provided in each pipe of the expansible and contractible arm, the spindle of the sprocket of each adjacent moving means being secured to a part of the endless chain of each opposite moving means, the pipe located at one end of the expansible and contractible arm being coupled with a conveyor frame of the moving means provided in said pipe, thereby enabling to rotationally drive the terminal sprocket of the moving means provided in the pipe at the other end of the expansible and contractible arm.

REFERENCES:
patent: 2335573 (1943-11-01), Scott
patent: 3534867 (1970-10-01), Johnston et al.
patent: 3591006 (1971-07-01), Daferner et al.
patent: 3638806 (1972-02-01), Hippach
patent: 4169338 (1979-10-01), Elk

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