Abstract: A burnishing machine having a burnishing motor in a motor compartment covered with a hood defining an air plenum having at least one air inlet positioned near the top of the hood spaced from the floor. The plenum includes a discharge outlet immediately adjacent the motor such that clean air is drawn through the air inlet, flows through the plenum to the discharge outlet for providing clean air to cool the burnishing motor.

Abstract: A burnishing machine having a burnishing motor in a motor compartment covered with a hood defining an air plenum having at least one air inlet positioned near the top of the hood spaced from the floor. The plenum includes a discharge outlet immediately adjacent the motor such that clean air is drawn through the air inlet, flows through the plenum to the discharge outlet for providing clean air to cool the burnishing motor.

Abstract: An automatic floor cleaning machine includes a unitary, self-contained and propelled, power driven body mounting from front to rear in a normal cleaning direction of travel: a propulsion mechanism including drive wheels and guide wheels for dry tracking on the floor surface to be cleaned, a scrubber mechanism including a pair of rearwardly disposed, vertically articulated counter-rotating magnetically and floatably mounted brushes for wetting and cleaning such floor surface, a vacuum mechanism including a vertically and horizontally articulated quick-detachable squeegee for drying of and proper tracking on the cleaned surface, and a combined mechanical and electrical control system operatively associated with each of such propulsion, scrubber and vacuum mechanisms, for convenient actuation by a walk-behind operator to control actuation of such machine.

Abstract: An improved support (48) for mounting a crescent shaped squeegee assembly (46) on the body (18) of a self propelled walk behind floor scrubbing machine (10) of the type which deposits cleaning fluid on a hard surfaced floor, scrubs the floor, and then squeegees and vacuums the dirty cleaning fluid from the floor. The squeegee supporting means (48) includes first and second intermediate members (84, 98) and first, second, and third pivot means (68, 70, 72). The first pivot means (68) secures the first intermediate member (84) to the body (18) for swinging movement about a generally vertically extending axis (Z). The second pivot means (70) secures a forward portion of a downwardly and rearwardly extending arm (90) to the first intermediate member for swinging movement about a generally transversely extending axis (Y). The second intermediate member is secured to a rear portion of the arm, the securing means including an attitude adjusting member (102).

Abstract: An improvement for floor maintenance equipment employing electrically driven scrubbing or polishing brushes including means for varying the speed of the brush motors. Two brush speeds are provided by switching apparatus which change the interconnection of the brush motors from series to parallel and from parallel to series. This results in a substantial change in motor speed and power.