US 5,369,838 A · Automatic floor scrubber

Abstract

An automatic floor scrubber (10) is disclosed having its frame divided into a truck (12) and an upper assembly (14) isolated from each other by a multiplicity of elastomeric isolator mounts (106) arranged in a nonlinear fashion. The wheels (18, 20), the drive motor (22), the squeegee system (26), and the brush scrub system (28) are mounted to the subframe (16) of the truck (12). The control handle (46), solution tanks (48, 50), and batteries (74) are mounted to the chassis (44) of the upper assembly (14). The mounts (106) include integral first and second portions (108, 110), with the first portion (108) sandwiched between the subframe (16) and the chassis (44) and the second portion (110) insertable into a mount aperture (118) and axially compressed into a mushroom shape by bolts (122) to capture the mount aperture (118). An acoustical tunnel (84) extends longitudinally in the chassis ( 44) intermediate the batteries (74) and defines a closed volume lined with foam sheets (88). The outlet hose (104) of the vacuum system (52) extends through the open end of the tunnel (84) and exhausts the air therein, with the air escaping from the closed volume flowing around the outlet hose (104) and through the open end of the tunnel (84).

Claims21

Dependent claims

Machine for cleaning floors comprising, in combination:

a truck comprising, in combination:
a subframe, means mounted to the subframe for movably supporting the subframe upon the floor, means mounted to the subframe for moving the subframe upon the floor, and means mounted to the subframe for scrubbing the floor;
an upper assembly comprising, in combination:
a chassis, at least a first tank carried by the chassis for holding floor cleaning solution, and a control handle mounted to the chassis;
and suspension means between the subframe and the chassis for mounting the chassis to the subframe and dampening the transmission of vibrations at all attachments between the subframe and the chassis.

2 more elements

In a machine for cleaning floors including means for movably supporting the machine upon the floor, means for moving the machine upon the floor, means for scrubbing the floor, and at least a first tank for holding floor cleaning solution, an improved suspension system comprising, in combination:

a truck, with the movably supporting means mounted to the truck;
an upper assembly, with the first tank carried by the upper assembly;
and a multiplicity of elastomeric isolator mounts between the truck and the upper assembly and arranged in a nonlinear fashion for dampening the transmission of vibrations at all attachments between the truck and the upper assembly.

Dependencies are inferred from the claim text.

Automatic floor scrubber

Life of this patent

Automatic floor scrubber

Life of this patent

Abstract

Claims21