US PATENT SUBCLASS 137 / 242
.~.~ Mechanical cleaning

Current as of: June, 1999
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137 /   HD   FLUID HANDLING

237  DF  WITH CLEANER, LUBRICATION ADDED TO FLUID OR LIQUID SEALING AT VALVE INTERFACE {2}
238  DF  .~ Cleaning or steam sterilizing {4}
242.~.~ Mechanical cleaning {2}
243  DF  .~.~.~> Valve grinding motion of valve on seat {6}
244  DF  .~.~.~> Cleaning member reciprocates in passage {2}

DEFINITION

Classification: 137/242

(under subclass 238) Systems in which the undesired material is removed from the device or system or parts thereof by the physical interaction of two or more parts of the device or system, not including relations or operations which are part of or necessary for flow handling.

(1) Note. One or more of the interacting parts may be parts present solely for cleaning purposes, or all may have utility

as flow handling means provided the two modes of operation are present.

(2) Note. This and the first indented subclass include disclosures relating to valve grinding only where the assembled system is described as having a specific nonvalving member or motion which produces valve grinding action or where the system or part when disassembled has a specific member that facilitates valve grinding.

SEE OR SEARCH THIS CLASS, SUBCLASS:

315+, for systems having features related especially to disassembly and repair.

330+, for systems having nonvalving motion of the valve or valve seat for purposes other than cleaning or disassembling, though the motion may prevent fouling or dislodge material tending to settle on the valve parts. SEE OR SEARCH CLASS

15, Brushing, Scrubbing, and General Cleaning,

104.31+, for sewer cleaners.