US PATENT SUBCLASS 15 / 250.26
.~.~ Screw type drive for reciprocating cleaning element

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

246  DF  ATTACHMENTS {8}
250.001  DF  .~ Optical-member-attachable cleaner (e.g., windshield wiper) {28}
250.26.~.~ Screw type drive for reciprocating cleaning element

DEFINITION

Classification: 15/250.26

(under subclass 250.001) Devices wherein the surface contacting member is mounted for translatory movement back and forth and in which the means effecting the movement comprises a rotating cylindrical helix.

(1) Note. This apparatus usually comprises a rotating screw member moving a nut member on which the surface contacting member is mounted.