Self-propelled carpet scrubbing machine

Details Self-propelled carpet scrubbing machine Self-propelled carpet scrubbing machine

1987-10-19

1989-02-14

Hornsby, Harvey C.

15359, A47L 700

Patent

active

048037532

ABSTRACT:
A self-propelled carpet scrubbing machine includes a solution tank for storing cleaning solution and a recovery tank for storing the dirty recovered solution. The machine is front-wheel driven and includes a rear axle which is mounted by means of a resilient member which permits it to rock about a central axis extending in the direction of travel to insure that all four wheels, and principally the drive wheels, are in contact at all times with the surface being cleaned. A vacuum recovery assembly is mounted by cushioned spring assemblies which permit the vacuum recovery assembly to rock upwardly thereby permitting the machine to be operated in reverse, without having to raise the assembly. When the machine is then returned to forward motion, the vacuum recovery assembly rotates back to the normal use position. The scrub brush is adjustable relative to the height of the carpet being cleaned whereas the vacuum shoe is always maintained in the same position relative to the carpet and under uniform pressure for more efficient and reliable recovery of the spent solution.

REFERENCES:
patent: 3065490 (1962-11-01), Arones
patent: 4000536 (1977-01-01), Nayfa et al.
patent: 4041567 (1977-08-01), Burgoon
patent: 4196492 (1980-04-01), Johnson et al.
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patent: 4334335 (1982-06-01), Brown et al.
patent: 4380844 (1983-04-01), Waldhauser et al.
patent: 4483041 (1984-11-01), Waldhauser et al.
patent: 4500113 (1985-02-01), Law
patent: 4586208 (1986-05-01), Trevarthen

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