Sweeper Brush Frame with Adjustable Hood
A sweeper apparatus includes a brush frame with first and second sides and a top surface. A brush roll is supported on the brush frame and is adapted for rotation to dislodge snow or other debris from an associated surface. A brush hood is connected to the brush frame and includes a hood surface located between the top surface and the brush roll. The hood surface extends between the first and second lateral sides of the brush frame and is selectively movable between an up position and a down position. A stripper bar is connected to the brush hood and is movable with the hood surface when the hood surface moves between its down and up positions. At least one actuator is operably connected between the brush frame and the brush hood and is selectively operable to move the hood surface between its up and down positions.
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This application claims priority from and benefit of the filing date of U.S. provisional patent application Ser. No. 61/415,668 filed Nov. 19, 2010, and the entire disclosure of said provisional patent application is hereby expressly incorporated by reference into the present specification.
BACKGROUNDSweepers for clearing snow or other debris from a runway or other surface are generally known. These sweeps are pushed or towed by a vehicle and include one or more rotating brush rolls that include bristles that dislodge ice, snow, sand, and other debris from the surface being cleaned and direct same forward and/or toward either lateral side of the surface being cleaned. Such sweepers include a brush hood that covers the upper portion of the rotating brush roll and that carries a stripper bar on a forward edge thereof. The position of the hood relative to the brush roll is adjustable using first and second manually operable jacks devices, to ensure that the hood is properly positioned as the size of the brush roll varies due to wear or replacement, and to ensure that the stripper bar is properly positioned to dislodge debris from the brush roll bristles without excessive contact between the bristles and the stripper bar.
Known sweepers as described have enjoyed widespread commercial success, but the means by which the brush hood is adjusted has been found to be less than optimal. With known devices, it is possible for the hood to be unevenly positioned on one lateral side as compared to the other due to the independently operable jack devices.
Also, such known brush hoods use a snow deflector connected to a forward edge thereof. The position of this deflector relative to the brush hood must be independently adjusted when the position of the brush hood is changed. This requires more operator time and effort and can lead to improper positioning of the snow deflector.
Known adjustable brush hoods have also been structured such that an outer surface thereof is oriented such that falling snow is able to accumulate thereon. This accumulation of snow is undesirable in that it increases the weight of the sweeper and reduces operator visibility of the surface being cleaned.
As such, a need has been identified for a new and improved adjustable brush hood for a sweeper that overcomes the above deficiencies and others while providing better overall results.
SUMMARYAccording to one embodiment of the present development, a sweeper apparatus includes a brush frame comprising first and second lateral sides and a top surface that extends between the first and second lateral sides. A brush roll is rotatably supported on the brush frame and is adapted for rotation relative to the brush frame to dislodge snow or other debris from an associated surface. A brush hood is connected to the brush frame and includes a hood surface located between the top surface and the brush roll. The hood surface extends between the first and second lateral sides of the brush frame and is selectively movable between an up position and a down position. A stripper bar is connected to the brush hood and is movable with said hood surface when said hood surface moves between its down and up positions. At least one actuator is operably connected between the brush frame and the brush hood and is selectively operable to move the hood surface between its up and down positions.
In accordance with another aspect of the present development, a sweeper brush frame includes first and second lateral sides and a top surface that extends between the first and second lateral sides. A brush roll support is provided for rotatably supporting an associated brush roll. A movable brush hood is connected to said brush frame and includes a hood surface located between the top surface and the brush roll. The hood surface extends between the first and second lateral sides of the brush frame and is selectively movable between an up position and a down position. At least one actuator is operably connected between a fixed part of the brush frame and the movable brush hood. The actuator is selectively operable to move the hood surface between its up and down positions.
A control system is optionally provided to vary the position of the hood surface in response to changes in the diameter of the brush roll due to wear such that the hood surface and a stripper bar connected thereto are optimally positioned at all times during use of the sweeper.
Additional features and alternative embodiments of the present development are described below.
As is generally known in the art, the sweeper S is pushed or towed in a forward direction FD on a surface (optionally angled toward one lateral side or the other of the surface) and the brush rolls rotate in a sweeping direction SD so that snow, dirt or other debris being swept is dislodged from the surface and is directed forward and laterally due to the flicking action of the brush roll bristles.
The sweeper S includes a caster frame CF that includes a plurality of casters or other wheels W that for movably support the sweeper on the surface being cleared. A coupler CP is connected to the caster frame CF and is configured to mate with the front of a vehicle that pushes the sweeper S or with a towing unit that pulls the sweeper behind a vehicle. The angle between the caster frame CF and the coupler CP is adjustable using hydraulic cylinders AA (one shown in
The brush frame BF is connected to the caster frame CF.
Referring now also to
Prior sweepers have covered the top surface TS of the brush frame with a “shed” or other cowling or covering that is intended to prevent snow build-up thereon. These prior sheds included a flat surface that has been found to allow snow to accumulate under certain conditions when the brush frame BF is pivoted forward/down relative to the caster frame CF. According to the present development, as best seen in
As shown in broken lines in
The inner end H1 of the hood H is pivotally connected to a hood support tube T2 that runs laterally across the brush frame BF between the side walls W1,W2 and that is arranged parallel to the frame support tube T1 of the caster frame CF. More particularly, the brush frame BF comprises one or more hood support hinges G that are spaced laterally across the brush frame. As shown in
A snow deflector SD comprises an upper deflector or upper deflector portion UD and comprises a lower deflector or deflector portion LD. The snow deflector SD is located and extends between the side walls W1,W2. The upper deflector portion UD comprises a sheet of steel or a polymeric or other material that extends between and covers the first links L1 of each support linkage L. The lower deflector portion LD comprises a sheet of steel or a polymeric or other material that extends between and covers the second links L2 of each support linkage L. Preferably the snow deflector SD extends completely and continuously between the opposite lateral side walls W1,W2 of the brush frame BF. The upper and lower snow deflectors UD,LD cooperate to define the snow deflector SD that changes size and shape as the hood H is moved up and down, due to the movement of the links L1,L2 as described. In particular, with reference to
Referring specifically to
As also shown in
In a first example, this is accomplished by operably connecting each hinge actuator AT hydraulically or otherwise to the brush frame pivot actuator(s) TA that controls the angular position of the brush frame BF relative to the caster frame CF on the arc A. For example, as shown in
The present development ensures that the hood surface HS and stripper bar SB are correctly positioned relative to the brush roll BR so that the stripper bar SB is properly positioned to dislodge ice and other debris from the brush roll BR, and also to minimize undesired turbulence in the air stream that flows between the brush roll BR and the hood surface HS in order to increase the cleaning efficiency and power of the brush roll BR.
The claims, as originally presented and as they may be amended, encompass variations, alternatives, modifications, improvements, equivalents, and substantial equivalents of the embodiments and teachings disclosed herein, including those that are presently unforeseen or unappreciated, and that, for example, may arise from applicants/patentees and others.
Claims
1. A sweeper apparatus comprising:
- a brush frame comprising first and second lateral sides and a top surface that extends between the first and second lateral sides;
- a brush roll rotatably supported on the brush frame and adapted for rotation relative to the brush frame to dislodge snow or other debris from an associated surface;
- a brush hood connected to said brush frame and comprising a hood surface located between the top surface and the brush roll, said hood surface extending between said first and second lateral sides of the brush frame and selectively movable between an up position and a down position;
- a stripper bar connected to said brush hood and movable with said hood surface when said hood surface moves between its down and up positions;
- at least one actuator operably connected between said brush frame and said brush hood and selectively operable to move said hood surface between its up and down positions.
2. The sweeper apparatus as set forth in claim 1, further comprising a plurality of hinges that pivotally connect said hood surface to said brush frame, each of said hinges comprising a hood support arm and a support linkage, said hood support arm including an inner end pivotally connected to the brush frame and an outer end pivotally connected to said support linkage, wherein said hood surface is connected to each of said hood support arms.
3. The sweeper apparatus as set forth in claim 2, wherein each respective support linkage connected to an outer end of one of said hood support arms comprises:
- a first link including inner and outer ends, said inner end of said first link pivotally connected to said brush frame in a fixed location;
- a second link including inner and outer ends, said inner end of said second link pivotally connected to said outer end of the respective hood support arm;
- wherein said outer ends of said first and second links are pivotally connected to each other.
4. The sweeper apparatus as set forth in claim 3, wherein said brush frame further comprises:
- a first link cross bar secured in a fixed position, wherein the inner end of the first link of each support linkage is pivotally connected to said first link cross bar;
- a second link cross bar arranged parallel to the first link cross bar, wherein to outer ends of the first and second links of each support linkage are pivotally interconnected by the second link cross bar;
- wherein said second link cross bar moves relative to said first link cross bar when said hood surface moves between its up and down positions.
5. The sweeper apparatus as set forth in claim 4, further comprising:
- a deflector that extends between the first and second lateral sides of the brush frame, said snow deflector comprising an upper deflector portion that covers the first link of each support linkage and a lower deflector portion that covers the second link of each support linkage.
6. The sweeper apparatus as set forth in claim 5, wherein an angle defined between said upper and lower deflector portions changes size depending on a location of said hood surface between its up and down positions.
7. The sweeper apparatus as set forth in claim 2, wherein said brush frame comprises a plurality of ribs that support said top surface, wherein each of said hood support arms is laterally aligned with one of said ribs.
8. The sweeper apparatus as set forth in claim 7, wherein said at least one actuator comprises a plurality of actuators, each of which is operably connected between one of said ribs and a corresponding one of said hinges.
9. The sweeper apparatus as set forth in claim 2, further comprising a caster frame connected to said brush frame, said caster frame comprising a plurality of wheels that movably support said brush frame relative to an associated surface to be cleaned.
10. The sweeper apparatus as set forth in claim 9, wherein said brush frame is pivotally connected to said caster frame and pivots about a pivot axis between first and second positions.
11. The sweeper apparatus as set forth in claim 10, further comprising a control system operatively connected to said at least one actuator to control movement of said hood surface between its up and down positions, wherein said control system controls said at least one actuator based upon a change in an angular position of said brush frame relative to said caster frame.
12. The sweeper apparatus as set forth in claim 1, further comprising a control system operatively connected to said at least one actuator to control movement of said hood surface between its up and down positions, wherein said control system controls said at least one actuator based upon input received from at least one of: (i) a user operated switch; (ii) a sensor that detects a relative position between said hood surface or said stripper bar and said brush roll.
13. The sweeper apparatus as set forth in claim 1, further comprising a control system operatively connected to said at least one actuator to control movement of said hood surface between its up and down positions, wherein said control system is programmed to move said hood surface from an up position toward a down position periodically based upon elapsed time usage of said sweeper apparatus.
14. The sweeper apparatus as set forth in claim 5, wherein said at least one actuator for moving the hood surface between its up and down positions is located inside a space defined between said top surface, said deflector, and said hood surface.
15. A sweeper brush frame comprising:
- first and second lateral sides and a top surface that extends between the first and second lateral sides;
- a brush roll support for rotatably supporting an associated brush roll;
- a movable brush hood connected to said brush frame and comprising a hood surface located between the top surface and the brush roll, said hood surface extending between said first and second lateral sides of the brush frame and selectively movable between an up position and a down position;
- at least one actuator operably connected between a fixed part of said brush frame and said movable brush hood, said actuator selectively operable to move said hood surface between its up and down positions.
16. The sweeper brush frame as set forth in claim 15, further comprising a plurality of hinges that pivotally connect said hood surface to a fixed part of said brush frame, each of said hinges comprising a hood support arm and a support linkage, said hood support arm including an inner end pivotally connected to the fixed part of the brush frame and an outer end pivotally connected to said support linkage, wherein said hood surface is connected to each of said hood support arms.
17. The sweeper brush frame as set forth in claim 16, wherein each respective support linkage connected to an outer end of one of said hood support arms comprises:
- a first link including inner and outer ends, said inner end of said first link pivotally connected to said brush frame in a fixed location;
- a second link including inner and outer ends, said inner end of said second link pivotally connected to said outer end of the respective hood support arm;
- wherein said outer ends of said first and second links are pivotally connected to each other.
18. The sweeper brush frame as set forth in claim 17, wherein said brush frame further comprises:
- a first link cross bar secured in a fixed position, wherein the inner end of the first link of each support linkage is pivotally connected to said first link cross bar;
- a second link cross bar arranged parallel to the first link cross bar, wherein to outer ends of the first and second links of each support linkage are pivotally interconnected by the second link cross bar;
- wherein said second link cross bar moves relative to said first link cross bar when said hood surface moves between its up and down positions.
19. The sweeper brush frame as set forth in claim 15, wherein said at least one actuator for moving the hood surface between its up and down positions is located inside a space defined between said top surface and said movable brush hood.
Type: Application
Filed: Nov 19, 2011
Publication Date: Jul 5, 2012
Applicant:
Inventors: R. Dane Davis (Boise, ID), Robert Sikorski (Stow, OH), Steven Shank (Brooklyn, MI), Jamie Davis (Ypsilanti, MI)
Application Number: 13/300,559
International Classification: A47L 11/24 (20060101); A46B 13/02 (20060101);