Cleaning attachment for vacuum cleaner

Claim 1

A CLEANING ATTACHMENT FOR A SUCTION CLEANER COMPRISING A HOUSING DEFINING AN ELONGATED CHAMBER OPEN AT THE BOTTOM AND INCLUDING MEANS ADAPTED TO BE CONNECTED TO A SUCTION CLEANER TO PRODUCE A SUCTION IN AT LEAST A PORTION OF SAID CHAMBER, A PLURALITY OF PAIRS OF SPACED GUIDE MEMBERS IN SAID HOUSING, AN ELONGATED BRUSH INCLUDING AN ELONGATED RIGID BRUSH SUPPORTING MEMBER, SAID BRUSH SUPORTING MEMBER HAVING ITS LONGITUDINAL AXIS PARALLEL WITH THE LONGITUDINAL AXIS OF SAID ELONGATED CHAMBER AND DISPOSED IN THE SPACE DEFINED BETWEEN SAID PAIRS OF SPACED GUIDE MEMBERS, FIXED STO MEANS ENGAGEABLE WITH THE LOWER EDGE OF SAID BRUSH SUPPORTING MEMBER DETERMINING THE LOWERMOST POSITION OF SAID BRUSH, SPRING MEANS BIASING SAID BRUSH AGAINST SAID STOP MEANS, A BRUSH LOCK PLATE PIVOTALLY MOUNTED WITHIN SAID HOUSING ABOUT A GENERALLY VERTICALLY AXIS WHEN SAID OPEN BOTTOM OF SAID CHAMBER IS ADJACENT A SURFACE TO BE CLEANED, SAID BRUSH LOCK PLATE INCLUDING A CAM SURFACE ENGAGEABLE WITH THE LOWER EDGE OF SAID BRUSH SUPPORTING MEMBER TO PROVIDE ADJUSTABLE STOP MEANS DETERMINING SELECTIVELY ADJUSTABLE-LOWER POSITIONS OF SAID BRUSH.