| 摘要 |
There is disclosed a device mounted for traveling movement on the edge of a rain gutter to clean it. The frame of this device may be stamped from a single sheet of metal or molded as a single piece from a plastic and has a vertical portion, to which is rigidly secured, the fixed tubular part of a rotary valve. Support rollers are carried on horizontal axes in turn carried by a vertical portion of the frame and these support rollers support the device for travel on the outer edge of a rain gutter. The frame continues to a U-shaped portion providing a horizontal frame portion. Guide rollers are mounted on vertical axes carried by the horizontal frame portion. These guide rollers are individually adjustable and support the device against lateral tipping. The fixed tubular valve part may have one nozzle or may have two nozzles connected therewith directing fluid in opposite directions in a rain gutter. In one version a rotary valve part is mounted in the fixed valve part and is connected with a conduit in turn connected with a source of fluid under pressure. The rotary valve part is movable to connect the source of fluid alternately with one or the other nozzle. The conduit to the source of fluid is rigid and also functions as a mechanism to be hand engaged to cause the device to travel and also as a lever for operating the rotary valve parts.
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