Carpet cleaning device

• US 4,139,922 A
• Filed: 08/19/1977
• Issued: 02/20/1979
• Est. Priority Date: 08/19/1977
• Status: Expired due to Term

• Current Assignee: Chester Fitch
• Original Assignee: Chester Fitch
• Inventors: Fitch, Chester
• Primary Examiner(s): Moore, Christopher K.
• Application Number:
  US05/825,917
• Time in Patent Office: 550 Days
• Field of Search: 15/320, 15/321, 15/322, 15/340, 15/372
• US Class Current: 15/321
• CPC Class Codes: A47L 11/302 having rotary tools
• CPC Class Codes: A47L 11/34 Machines for treating carpets in position by liquid, foam, or vapour, e.g. by steam
• CPC Class Codes: A47L 11/4069 Driving or transmission means for the cleaning tools
• CPC Class Codes: A47L 11/4072 Arrangement of castors or wheels
• CPC Class Codes: A47L 11/4075 Handles; levers
• CPC Class Codes: A47L 11/4088 Supply pumps; Spraying devices; Supply conduits

Abstract

A reversible electric motor is mounted in a frame and is connected to front and rear rotary brushes mounted transversely in the frame adjacent the front of the machine with a transverse vacuum nozzle being situated between the brushes. A transverse spray nozzle bar is situated forwardly of the front brush and a further spray nozzle bar is situated rearwardly of the rear brush. A transverse ground engaging drive roller is mounted adjacent the rear of the machine and is also connected to the electric motor. A handle extends upwardly and rearwardly from the rear of the machine and carries controls for the electric motor and for the spray nozzle bars. The vacuum nozzle and the spray bars are connected by flexible hoses to a remotely situated solution tank and recovery tank unit which also includes a source of vacuum such as a vacuum cleaner. Hot water and detergent are sprayed onto the carpet through the spray nozzle assemblies in advance of one of the brushes depending upon the direction of movement of the machine and is brushed into the carpet pile and extracted together with loosened dirt, by the vacuum nozzle therebehind. The machine rides on the drive roller and the engagement of the brushes and vacuum nozzle with the carpet is controlled by the handle manipulated by the operator.

Claims

1. A carpet cleaning assembly for use with a remotely situated solution tank and recovery tank unit including a source of vacuum;

comprising in combination a frame, handle means extending upwardly and rearwardly from the rear of said frame for controlling said assembly, a source of power in said frame, a transversely situated vacuum nozzle mounted in said frame and operatively connectable to said source of vaccum, ground engaging drive means, spanning said frame forwardly of the rear thereof and being operatively connected to said source of power, two transversely situated rotatable brush components in said frame one in front of and one behind said vacuum nozzle also operatively connected to said source of power and a transversely situated spray bar assembly mounted in said frame adjacent each respective brush component and being connectable to said solution tank and valve means on said handle operatively connected between said spray bar assemblies and said solution tank for selectively controlling the connection between said solution tank and either one of said spray bar assemblies.

2. The assembly according to claim 1 in which each of said spray bar assemblies includes a manifold across said frame and a plurality of spray nozzles secured to the underside of said manifold and operatively connected thereto, at least one nozzle adjacent each end of said manifold being directed outwardly and downwardly therefrom.

3. The assembly according to claim 2 in which said ground engaging drive means comprises a roller journalled for rotation within said frame and being operatively connected to said source of power and switch means on said handle operatively connected to said source of power for controlling the stopping and starting of said roller and the direction of rotation thereof.

4. The assembly according to claim 3 in which each of said rotatable brush components includes a shaft, a rotary brush secured to said shaft and spanning said frame, a vertically slotted plate forming part of said frame adjacent each end of each of said brush components, the ends of said shaft of said brush components being mounted within said slots, and compression springs reacting between the upper ends of said slots and the ends of said shafts thereby mounting said brush components for limited vertical floating action within said frame.

5. The assembly according to claim 2 in which each of said rotatable brush components includes a shaft, a rotary brush secured to said shaft and spanning said frame, a vertically slotted plate forming part of said frame adjacent each end of each of said brush components, the ends of said shaft of said brush components being mounted within said slots, and compression springs reacting between the upper ends of said slots and the ends of said shafts thereby mounting said brush components for limited vertical floating action within said frame.

6. The assembly according to claim 1 in which said ground engaging drive means comprises a roller journalled for rotation within said frame and being operatively connected to said source of power and switch means on said handle operatively connected to said source of power for controlling the stopping and starting of said roller and the direction of rotation thereof.

7. The assembly according to claim 6 in which each of said rotatable brush components includes a shaft, a rotary brush secured to said shaft and spanning said frame, a vertically slotted plate forming part of said frame adjacent each end of each of said brush components, the ends of said shaft of said brush components being mounted within said slots, and compression springs reacting between the upper ends of said slots and the ends of said shafts thereby mounting said brush components for limited vertical floating action within said frame.

8. The assembly according to claim 1 in which each of said rotatable brush components includes a shaft, a rotary brush secured to said shaft and spanning said frame, a vertically slotted plate forming part of said frame adjacent each end of each of said brush components, the ends of said shaft of said brush components being mounted within said slots, and compression springs reacting between the upper ends of said slots and the ends of said shafts thereby mounting said brush components for limited vertical floating action within said frame.