Dust control for power floor treating apparatus

• US 3,979,789 A
• Filed: 12/10/1973
• Issued: 09/14/1976
• Est. Priority Date: 03/16/1973
• Status: Expired due to Term

• Current Assignee: Tennant Company
• Original Assignee: Tennant Company
• Inventors: Hennessey, Robert D., Peabody, Ralph C.
• Primary Examiner(s): Moore, Christopher K.
• Application Number:
  US05/423,294
• Time in Patent Office: 1,009 Days
• Field of Search: 15/340, 15/347, 15/349, 15/373
• US Class Current: 15/349
• CPC Class Codes: A47L 11/24 Floor-sweeping machines, motor-driven
• CPC Class Codes: A47L 11/4027 Filtering or separating contaminants or debris
• CPC Class Codes: A47L 11/4041 Roll shaped surface treating tools
• CPC Class Codes: A47L 11/4052 Movement of the tools or the like perpendicular to the cleaning surface
• CPC Class Codes: A47L 11/4055 for lifting the tools to a non-working position
• CPC Class Codes: A47L 11/4069 Driving or transmission means for the cleaning tools
• CPC Class Codes: A47L 11/4077 Skirts or splash guards

Abstract

A power floor treating assembly having an improved arrangement for housing and mounting the rotary brush or other floor maintenance tool for sealing the brush or tool enclosure from ambient. The apparatus includes a main frame along with a powered output shaft for driving the rotary brush. Housing means are coupled to the frame to define a brush or rotary tool receiving enclosure, along with a solid debris receiving chamber which is in communication with the brush receiving enclosure. The rotary tool receiving enclosure is an enclosed sector having generally closed ends with transverse walls including a top wall, side walls, and with an open bottom. In addition, a solid-air separator is provided with a fluid evacuation port being formed in one of the brush enclosure walls. A baffle is provided within the rotary tool receiving enclosure, with the baffle means being disposed adjacent one of the transverse walls, and extending generally parallel to the axis of the rotary tool, with the location of the baffle being generally between the fluid evacuation port and the bottom opening in the rotary tool receiving enclosure.

Claims

1. Floor maintenance apparatus having a floor treating means including rotary brush means operatively coupled thereto and comprising, in combination:

a. a frame structure having support wheels coupled thereto, housing means coupled to said frame and defining a brush receiving enclosure with said enclosure having walls including a pair of opposed side walls arranged laterally of said enclosure, a solid debris receiving chamber in communication with said brush receiving enclosure, and a source of rotary power mounted on said frame and having a powered output shaft;

b. rotary brush suspension means coupled to said frame for journaled support of said rotary brush therewithin, said brush suspension means including first and second generally longitudinally extending laterally disposed support arms secured to said frame and being disposed adjacent said opposed side walls;

c. drive means coupled to said powered output shaft for imparting rotary motion to said rotary brush;

d. solid-air separation chamber means being provided to remove dust from dust-ladened air, and vacuum means in communication with said separation chamber and interposed between said separation chamber and ambient, conduit means extending between a port formed in said separation chamber and said vacuum means for establishing fluid communication between said separation chamber and said vacuum means, said solid-air separation chamber means being in communication with said brush receiving enclosure through a fluid receiving port formed in a wall of said brush receiving enclosure;

e. said brush receiving enclosure generally comprising an enclosed sector having generally closed ends and transverse walls and including a top wall and said opposed side walls with a bottom opening to define a work surface exposing opening, a solid debris transferring opening formed in one of said transverse walls for transfer of solid debris from said brush receiving enclosure to said solid debris receiving chamber disposed adjacent said solid debris transferring opening, a pair of spaced apart baffles disposed adjacent one of said transverse walls and extending generally parallel to the axis of said rotary brush, said baffles extending inwardly from said transverse walls and being arranged in close running clearance with the periphery of said rotary brush and being disposed between said fluid receiving port and said work surface exposing opening.

2. The floor maintenance apparatus as defined in claim 1 being particularly characterized in that filter means are mounted within said separation chamber and interpose a filter barrier between said fluid receiving port and said vacuum means.

3. The floor maintenance apparatus as defined in claim 1 being particularly characterized in that said rotary brush is mounted within said brush receiving enclosure with the periphery thereof being arranged for free-floating contact with the work surface being treated.

4. The floor maintenance apparatus as defined in claim 3 wherein flexible seals are provided along the base of a first of said side walls, and wherein the end of said rotary maintenance tool is disposed immediately adjacent said first side wall seal.

5. The floor maintenance apparatus as defined in claim 1 wherein flexible seals are provided about the entire periphery of said work surface exposing opening.

6. The floor maintenance apparatus as defined in claim 5 being particularly characterized in that filter means having a certain predetermined area are mounted within said separation chamber and interpose a filter barrier between said fluid receiving port and said vacuum means, and wherein the volume of air passing through said filter means is approximately 1/2 cubic foot per minute per inch of said flexible peripheral seal.

7. Floor maintenance apparatus having a floor treating means including rotary brush means operatively coupled thereto and comprising, in combination:

a. a frame structure having support wheels coupled thereto, housing means coupled to said frame and defining a brush receiving enclosure with said enclosure having walls including a pair of opposed side walls arranged laterally of said enclosure, a solid debris receiving chamber in communication with said brush receiving enclosure, and a source of rotary power mounted on said frame and having a powered output shaft;

b. rotary brush suspension means coupled to said frame for journaled support of said rotary brush therewithin, said brush suspension means including first and second generally longitudinally extending laterally disposed support arms secured to said frame and being disposed adjacent said opposed side walls;

c. drive means coupled to said powered output shaft for imparting rotary motion to said rotary brush;

d. solid-air separation chamber means being provided to remove dust from dust-ladened air, and vacuum means in communication with said separation chamber and interposed between said separation chamber and ambient, conduit means extending between a port formed in said separation chamber and said vacuum means for establishing fluid communication between said separation chamber and said vacuum means, said solid-air separation chamber means being in communication with said brush receiving enclosure through a fluid receiving port formed in a wall of said brush receiving enclosure;

e. said brush receiving enclosure generally comprising an enclosed sector having generally closed ends and transverse walls and including a top wall and said opposed side walls with a bottom opening to define a work surface exposing opening, a solid debris transferring opening formed in one of said transverse walls for transfer of solid debris from said brush receiving enclosure to said solid debris receiving chamber disposed adjacent said solid debris transferring opening, a first baffle and an auxilliary baffle being arranged along a wall of said brush receiving enclosure, with said baffles being arranged along the rear edge of said work surface exposing opening, with said first baffle and said auxilliary baffle being arranged in spaced said fluid receiving port, said first baffle and auxilliary baffle each extending generally parallel to the axis of said rotary brush.

8. Floor maintenance apparatus having a floor treating means including rotary brush means operatively coupled thereto and comprising, in combination:

a. a frame structure having support wheels coupled thereto, housing means coupled to said frame and defining a brush receiving enclosure with said enclosure having walls including a pair of opposed side walls arranged laterally of said enclosure, a solid debris receiving chamber in communication with said brush receiving enclosure, and a source of rotary power mounted on said frame and having a powered output shaft;

b. rotary brush suspension means coupled to said frame for journaled support of said rotary brush therewithin, said brush suspension means including first and second generally longitudinally extending laterally disposed support arms secured to said frame and being disposed adjacent said opposed side walls;

c. drive means coupled to said powered output shaft for imparting rotary motion to said rotary brush along a normal rotational direction;

d. solid-air separation chamber means being provided to remove dust from dust-ladened air, and vacuum means in communication with said separation chamber and interposed between said separation chamber and ambient, conduit means extending between a port formed in said separation chamber and said vacuum means for establishing fluid communication between said separation chamber and said vacuum means, said solid-air separation chamber means being in communication with said brush receiving enclosure through a fluid receiving port formed in a wall of said brush receiving enclosure;

e. said brush receiving enclosure generally comprising an enclosed sector having generally closed ends and transverse walls and including a top wall and said opposed side walls with a bottom opening to define a work surface exposing opening, a solid debris transferring opening formed in one of said transverse walls for transfer of solid debris from said brush receiving enclosure to said solid debris receiving chamber disposed adjacent said solid debris transferring opening, a baffle disposed adjacent one of said transverse walls and extending generally parallel to the axis of said rotary brush and being interposed between said fluid receiving port and said work surface exposing opening;

f. flexible seals being arranged in depending relationship from at least one wall of said brush receiving enclosure and disposed about the periphery of said work surface exposing opening, said flexible seals comprising skirt means coupled to said wall means and extending generally adjacent the periphery of at least one wall for isolating at least a portion of said brush receiving enclosure from ambient, said skirt means including a plurality of generally parallelly disposed spaced apart sealing elements cooperatively arranged to define at least one sealing chamber between adjacent sealing elements, and at least one opening being formed through that certain sealing element disposed along and adjacent said brush receiving enclosure to provide gaseous fluid communication between said floor treating means enclosure and said sealing chamber.

9. The floor maintenance apparatus as defined in claim 8 being particularly characterized in that said skirt means is disposed adjacent said baffle.