(under subclass 250.001) Cleaners having a motor driven surface contacting member and wherein (1) means is provided whereby the surface contacting member is stopped only in a predetermined position; or (2) interlocking means, other than an actuating mechanism, is provided to hold the surface contacting member in a predetermined position on the window.
(1) Note. Mere manual means for actuating the surface contacting member to move it to the side of the window are classified elsewhere in appropriate subclasses.
SEE OR SEARCH THIS CLASS, SUBCLASS:
250.15, for spring means for operating the surface contacting member on the return stroke and which will also hold the element in a predetermined parked position.
250.19, for means for moving the cleaning element from the surface at the end of the stroke.
SEE OR SEARCH CLASS
91, Motors: Expansible Chamber Type, 7, and 218+, note especially subclasses 282+ and 284+ for cyclically operable expansible chamber motors having means to cause the motor to be stopped in a predetermined position.
