Sanitizer attachment for a mobile floor cleaner

• US 4,429,432 A
• Filed: 05/26/1981
• Issued: 02/07/1984
• Est. Priority Date: 05/26/1981
• Status: Expired due to Term

• Current Assignee: Servicemaster Company (Rentokil Initial PLC)
• Original Assignee: Service Master Industries Incorporated
• Inventors: Shallenberg, Robert L., Blomgren, Roland A., Copeland, William M.
• Primary Examiner(s): Moore, Chris K.
• Application Number:
  US06/266,798
• Time in Patent Office: 987 Days
• Field of Search: 15/257 B, 15/320, 15/347, 15/339, 15/50 R
• US Class Current: 15/320
• CPC Class Codes: A47L 11/29 Floor-scrubbing machines characterised by means for taking-up dirty liquid
• CPC Class Codes: A47L 11/4011 Regulation of the cleaning machine by electric means; Control systems and remote control systems therefor
• CPC Class Codes: A47L 11/4027 Filtering or separating contaminants or debris
• CPC Class Codes: A47L 11/4077 Skirts or splash guards
• CPC Class Codes: A47L 11/4083 Liquid supply reservoirs; Preparation of the agents, e.g. mixing devices
• CPC Class Codes: A47L 11/4088 Supply pumps; Spraying devices; Supply conduits

Abstract

An improved apparatus for spraying a fluid or fluid and gas mixture behind and substantially in the path of a mobile floor cleaner. An attachment housing is attached to the mobile floor cleaner, and at least one spray nozzle is positioned in the housing to generate a fluid or fluid and gas spray. Fluid is supplied to the spray nozzle by a fluid reservoir that is attached to the housing and connected to the spray nozzle by means of a fluid line.

Claims

1. In a mobile vehicle floor cleaner, the improvement comprising an apparatus for spraying a fluid on a floor, said apparatus comprising:

(a) a spray nozzle rigidly mounted on the floor cleaner and directed toward the floor behind the floor cleaner;

(b) a fluid reservoir fixed to the floor cleaner;

(c) a fluid line connecting the fluid reservoir to the spray nozzle;

(d) a housing having an upper end and an open lower end opposite the upper end and nearest the floor, the housing being rigidly secured to the floor cleaner, surrounding the spray nozzle, and terminating at the lower end in a shroud for confining the spray from the spray nozzle to a predetermined portion of the floor behind and substantially in the path of the floor cleaner as the floor cleaner advances; and

(e) means for forcing fluid from the fluid reservoir through the spray nozzle.

2. The improved mobile floor cleaner of claim 1 wherein the forcing means (e) comprises a source of pressurized gas connected to the fluid reservoir and the spray nozzle.

3. The improved mobile floor cleaner of claim 1 or 2 wherein the lower end of the shroud includes a flexible skirt extending downwardly toward the floor and providing a barrier to confine the spray from the spray nozzle to the predetermined area of the floor.

4. The improved mobile floor cleaner of claim 2 wherein the source of pressurized gas includes means for supplying pressurized gas, a gas supply line from the supplying means to a central connector, a first conduit from the central connector to the spray nozzle, a second conduit from the central connector to the fluid reservoir, and a pressure regulator in the second conduit.

5. The improved mobile floor cleaner of claim 4 wherein the improvement also includes gas control means for increasing or decreasing the pressure of the gas delivered to the spray nozzle by the first conduit, and liquid valve control means for starting the fluid spraying action of the spray nozzle when the pressure delivered by the first conduit rises above a predetermined value and stopping the spraying action when the pressure drops below a predetermined value, the air control means and liquid valve control means being fixed to the mobile floor cleaner.

6. The improved mobile floor cleaner of claim 1 or 2 wherein the improvement also includes liquid control means for stopping and starting the forcing means and thereby stopping and starting the spraying action of the spray nozzle.

7. The improved mobile floor cleaner of claim 1, 2, 4, or 5, wherein (i) the mobile floor cleaner includes a vacuum device for transporting debris from a surface into an air stream, (ii) the spraying apparatus includes a first filter attached to the housing, and (iii) the housing is removably attachable to the floor cleaner and includes means for directing the air stream to the first filter.

8. The improved mobile floor cleaner of claim 7 wherein the mobile floor cleaner includes a second filter and the spraying apparatus also includes second means for receiving the air stream from the first filter and directing the air stream to the second filter, the first filter defining a trap for larger debris in the air stream and the second filter defining a trap for smaller debris in the air stream.

9. The improved mobile floor cleaner of claim 7 wherein the mobile floor cleaner includes a plurality of filters in series and the spraying apparatus also includes second means for receiving the air stream from the first filter and directing the air stream to the plurality of filters, the first filter providing a trap for larger debris in the air stream and said plurality of filters providing a trap for smaller debris in the air stream.

10. In an improved mobile floor cleaner of the type that has a forward and a rearward end and that includes (i) a vacuum cleaner for delivering debris gathered from a floor-like surface to an air stream, (ii) at least one cleaner filter, and (iii) a rearwardly extending handle for guiding the floor cleaner, the improvement comprising, in combination:

(a) a spray nozzle rigidly mounted on the floor cleaner below the handle and directed downwardly toward the floor behind the floor cleaner, the spray nozzle providing means for combining fluid and gas and generating a fluid and gas spray;

(b) a fluid reservoir mounted in the housing and including a receptacle for the receipt of pressurized gas;

(c) a fluid line connecting the fluid reservoir to the spray nozzle;

(d) a housing having an upper end nearest the handle and a lower end adjacent the floor, the housing being rigidly secured to the rearward end of the floor cleaner, surrounding the spray nozzle, and terminating at the lower end in a shroud including a flexible skirt abutting the floor, the shroud providing means for confining the spray from the spray nozzle to a predetermined portion of the floor behind and substantially in the path of the floor cleaner as the floor cleaner advances;

(e) a pressurized gas source including means for supplying pressurized gas, a central connector, a supply line for delivering gas from the supply means to the central connector, a first conduit for delivering gas from the central connector to the spray nozzle, a second conduit for delivering gas from the central connector to the fluid reservoir, and a pressure regulator for regulating the pressure of the gas delivered by the second conduit to the reservoir;

gas control means for increasing or decreasing the pressure of the gas delivered to the spray nozzle by the first conduit;

liquid valve control means for starting the fluid and gas spraying action of the spray nozzle when the pressure of the gas delivered by the first conduit rises above a predetermined value and stopping the spraying action when the pressure drops below a predetermined value;

an attachment filter attached to the housing;

first receiving means for receiving the air stream from the vacuum cleaner and delivering the air stream to the attachment filter; and

second receiving means for receiving the air stream from the attachment filter and delivering the air stream to the cleaner filter.