US PATENT SUBCLASS 15 / 104.063
.~.~.~.~ Scraper with signalling device

Current as of: June, 1999
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15 /   HD   BRUSHING, SCRUBBING, AND GENERAL CLEANING

104.001  DF  IMPLEMENTS {28}
104.03  DF  .~ Pipe, tube, or conduit cleaner {2}
104.05  DF  .~.~ Inside {8}
104.061  DF  .~.~.~ Fluid current operated {2}
104.063.~.~.~.~ Scraper with signalling device

DEFINITION

Classification: 15/104.063

Scraper with signalling device:

(under subclass 1046.061) Subject matter wherein the cleaning device is a scraper and includes an apparatus to indicate some condition relating to the scraper or the fluid in the pipeline.

(1) Note. The position of the scraper or the pressure of the fluid in the pipe are conditions sensed by the signalling device.

SEE OR SEARCH CLASS

250, Radiant Energy,

303, for a radiation tracer method for locating an obstruction in a fluid carrying pipeline by use of a radioactive tracer.

340, Communications: Electrical,

686.1+, for an electrical condition responsive position indicating system combined with a fluid propelled pipe scraper.