Flow control baffle for turf mower

• US 7,866,135 B2
• Filed: 08/28/2006
• Issued: 01/11/2011
• Est. Priority Date: 08/28/2006
• Status: Active Grant

• Current Assignee: Exmark Manufacturing Company Incorporated
• Original Assignee: Exmark Manufacturing Company Incorporated
• Inventors: Davis, Benjamin P., Stewart, Judd W., Nicholson, Gary L.
• Primary Examiner(s): Torres; Alicia M
• Application Number:
  US11/511,842
• Publication Number:
  US 20080047249A1
• Time in Patent Office: 1,597 Days
• Field of Search: 563/202
• US Class Current: 56/320.2
• CPC Class Codes: A01D 34/71 with means for discharging mown material A01D57/26 - A01D57/30 take precedence; combined with means for gathering or loading mown material A01D43/06

Abstract

A flow control baffle for a turf mower having a plurality of mower blades carried within a mower deck. The flow control baffle includes a foot wall section which extends from near a side discharge opening into the cutting chamber. The foot wall may be curved and may be movable to define a volute section of variable width. In one embodiment, the flow control baffle includes a panel wall and a foot wall, which are connected together and movable relative to other portions of the mower deck. In one embodiment, the flow control baffle is movable and selectively positioned within the cutting deck in order to optimize mower performance in view of location operating conditions. In one embodiment, the air flow control baffle defines sacrificial wear surfaces within the mower deck at locations of otherwise high wear.

Claims

1. A turf mower comprising:

a mower deck carrying a plurality of cutting blades and having a top wall and a plurality of walls defining a cutting chamber and a side discharge opening nearest one of said plurality of cutting blades, said top wall having a pair of apertures therethrough;

a sliding flow control baffle having a panel wall adapted to block part of the side discharge opening and a curved foot wall, with said curved foot wall extending generally vertically and inwardly into the mower deck between said top wall of the mower deck and a plane of rotation of said plurality of cutting blades, wherein a height of said foot wall decreases as said foot wall extends inwardly; and

a pair of fasteners passing through the pair of apertures and connecting the flow control baffle to an underside of the cutting chamber, together said pair of fasteners and said pair of apertures limiting a range of motion of the flow control baffle within the cutting chamber, and limiting said sliding flow control baffle to rotate generally about a center of said nearest one of said plurality of cutting blades, wherein the curved foot wall and a portion of said plurality of walls define a volute section, with said volute section having a variable width dependent on a position of said foot wall relative to said center, and with airflow through said side discharge opening being controlled by said volute width.

2. The turf mower of claim 1 wherein a curved portion of said plurality of walls is stationary and nearer to a front edge of the mower deck than the curved foot wall.

3. The turf mower of claim 1 wherein said panel wall and said foot wall remain generally vertical as said flow control baffle slides between positions.

4. The turf mower of claim 1 wherein said flow control baffle includes a top wall having a pair of apertures sized to receive said pair of fasteners.

5. A turf mower comprising:

a mower deck having a top wall and a plurality of walls together defining a cutting chamber, said mower deck having a side discharge opening through which grass is thrown during mower operation; and

a flow control baffle coupled through a sliding connection to said top wall, said baffle including a panel wall which blocks grass dispersal through a portion of said side discharge chute and a generally vertical curved foot wall, said foot wall extending inwardly into the mower deck between the top wall of the mower deck and a plane of rotation of a cutting blade, wherein said foot wall is curved, and said foot wall and a portion of said plurality of walls define a volute section of variable width dependent on said baffle position, and said sliding connection including a aperture in the top wall of the mower deck and a fastener connecting the flow control baffle to the mower deck, said sliding connection limiting said flow control baffle to rotate generally about a center axis of said cutting blade, wherein the foot wall and a curved portion of said mower deck define a volute section of variable width dependent on a position of said foot wall relative to said center axis, and with airflow through said side discharge opening being controlled by said volute width.

6. The turf mower of claim 5 wherein a height of said foot wall decreases as said foot wall extends inwardly.

7. The turf mower of claim 5 wherein said panel wall and said foot wall remain generally vertical as said flow control baffle slides between positions.

8. A turf mower comprising:

a mower deck having a top wall and a plurality of rotating cutting blades;

a flow control baffle being movable between at least two positions within the mower deck, said flow control baffle having a panel wall defining at least one edge of a side discharge opening, wherein said side discharge opening is increasingly blocked by said panel wall as said baffle moves between said at least two positions, and said flow control baffle includes a generally vertical curved foot wall extending inwardly into the mower deck between the top wall and a plane of rotation of said plurality of rotating cutting blades, wherein the foot wall and a curved portion of said mower deck define a volute section of variable width dependent on a position of said foot wall, and with airflow through said side discharge opening being controlled by volute width, and wherein a height of said foot wall decreases as said foot wall extends into the mower deck; and

a plurality of connectors to connect the flow control baffle to said mower deck, with said plurality of connectors including a fastener passing through a aperture of the mower deck and a aperture of the flow control baffle, and said plurality of connectors limit the flow control baffle to rotate generally about a center of one of said plurality of rotating cutting blades.

9. The turf mower of claim 8 wherein said panel wall extends beneath the plane of rotation of said plurality of cutting blades.

10. The turf mower of claim 9 wherein said panel wall and foot wall remain generally vertical as said flow control baffle rotates about said cutting blade center.

11. A turf mower comprising:

a mower deck carrying a plurality of cutting blades and having a top wall and a plurality of generally vertical walls together defining a cutting chamber;

a movable baffle having a curved foot wall extended generally from a side discharge opening into said cutting chamber, said foot wall together with at least one of said plurality of generally vertical walls defining a volute section of variable width dependent on a position of said movable baffle within said cutting chamber, wherein said at least one of said plurality of generally vertical walls is stationary relative to said movable baffle, and airflow through said side discharge opening is substantially dependent on a position of said movable baffle within said cutting chamber; and

means for connecting the baffle to an underside of the mower deck, said means including a first fastener connected to the baffle and passing through a first slot opening of the top wall of the mower deck and a second fastener connected to the baffle and passing through a second slot opening of the top wall, said means for connecting allowing the baffle to be selectively positioned within the cutting chamber, and said first and second slot openings limiting the baffle to rotate generally about a center of one of said plurality of cutting blades nearest to the side discharge opening.

12. The turf mower of claim 11 wherein said foot wall is generally vertical.

13. The turf mower of claim 11 wherein said foot wall extends into said cutting chamber between a mower blade and said top wall.

14. The turf mower of claim 11 wherein a height of said foot wall decreases as said wall extends into said cutting chamber.

15. The turf mower of claim 11 wherein said baffle includes a panel which blocks a portion of said side discharge opening dependent on said movable baffle position.

16. A turf mower comprising:

a mower deck carrying a plurality of cutting blades and having a top wall and a plurality of generally vertical walls together defining a cutting chamber;

a baffle having a curved foot wall extended generally from a side discharge opening into said cutting chamber, said foot wall extending between a plane of rotation of one of said plurality of cutting blades and the top wall of the cutting chamber, and said foot wall together with at least one of said plurality of generally vertical walls defining a volute section with a width dependent on a position of said baffle within said cutting chamber, wherein airflow through said side discharge opening is substantially dependent on a position of said baffle; and

a plurality of fasteners to connect the baffle to an underside of the mower deck, said plurality of fasteners cooperating with a plurality of apertures in the mower deck or the baffle or both to limit the baffle to rotation about a center axis of said one cutting blade.

17. The turf mower of claim 16 wherein said foot wall extends into said cutting chamber between a mower blade and said top wall.

18. A turf mower comprising:

a mower deck having a plurality of walls defining a cutting chamber containing a plurality of cutting blades and a side discharge opening nearest one of said plurality of cutting blades;

a flow control baffle having a panel wall and a curved foot wall extending inwardly between an upper wall of the mower deck and a cutting blade plane of rotation, with a height of said foot wall decreasing as said foot wall extends inwardly; and

a plurality of fasteners to connect the flow control baffle to an underside of the mower deck, with said plurality of fasteners cooperating with a plurality of apertures in the mower deck to limit positions of the flow control baffle within the mower deck, wherein said positions are related by rotation about a center axis of said nearest one of said plurality of cutting blades, and wherein the foot wall and a curved portion of the mower deck define a volute section of variable width dependent on a position of said foot wall, and with airflow through said side discharge opening being controlled by said volute width.

19. The turf mower of claim 18 wherein said flow control baffle is movably connected to said upper wall of said mower deck and is capable of being repositioned in order to optimize mower performance.

20. The turf mower of claim 19 wherein a portion of said flow control baffle is adapted to block part of the side discharge opening of said mower deck.

21. The turf mower of claim 20 wherein said portion is a portion of said panel wall.

22. The turf mower of claim 18 wherein said panel wall and said foot wall are generally vertically oriented during mower operation.

23. The turf mower of claim 18 wherein said foot wall extends from near said upper wall to a location above said cutting plane of rotation.

24. A method of turf mowing using a mower comprising:

providing a mower deck having a plurality of walls defining a cutting chamber containing a plurality of cutting blades and a side discharge opening nearest one of said plurality of cutting blades, a flow control baffle having a curved foot wall extending inwardly between an upper wall of the mower deck and a cutting blade plane of rotation, with a height of said foot wall decreasing as said foot wall extends inwardly, and a plurality of fasteners to connect the flow control baffle to an underside of the mower deck, with said plurality of fasteners cooperating with a plurality of apertures in the mower deck to define a range of positions of the flow control baffle within the mower deck, wherein positions in said range of positions are related by rotation of the flow control baffle about a center axis of said nearest one of said plurality of cutting blades, and wherein the foot wall and a curved portion of the plurality of walls define a volute section of variable width dependent on a position of said foot wall, and with airflow through said side discharge opening being controlled by said volute width;

accessing the plurality of fasteners and positioning the flow control baffle in a first position defining a volute section having a first width;

mowing turf with said flow control baffle in a first position;

accessing the plurality of fasteners and positioning the flow control baffle in a second position defining a volute section having a second width, with said second position being defined by rotation of the flow control baffle generally about said center axis; and

mowing turf with said flow control baffle in a second position.

25. The method of claim 24 wherein said accessing includes accessing the plurality of fasteners from above the mower deck, and said positioning includes sliding the flow control baffle about said center axis.