US PATENT SUBCLASS 15 / 358
.~.~.~ With work surface contact or penetration sensing

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

3  DF  MACHINES {11}
300.1  DF  .~ With air blast or suction {26}
354  DF  .~.~ With work-contacting carriage or mount, and relatively adjustable nozzle {5}
358.~.~.~ With work surface contact or penetration sensing

DEFINITION

Classification: 15/358

(under subclass 354) Apparatus having means functioning to sense the elevation of the plane of the covering or work

surface with respect to the support-contacting plane of the nozzle mount and to adjust the nozzle to a predetermined or optimum elevation based on the sensed elevation.

(1) Note. Where the sensing is continuous and the adjustment is continuously controlled thereby, the operation is regarded as being automatic and the patent is classified in subclass 319.

SEE OR SEARCH THIS CLASS, SUBCLASS:

319, see (1) Note.

362, for cleaners wherein the nozzle height is controlled as a function of the surface penetration of the nozzle mount but the nozzle is not adjusted relative to the mount.