Cutting reel suspension with adjustable spring downloading
First Claim
Patent Images
1. A lift arm assembly for a turf mower, having a frame comprising:
- a subframe adapted for attachment to the frame of the mower;
a plurality of lift arms arranged generally side-by-side, each lift arm including inner and outer ends;
means for pivotally securing the inner end of each lift arm to said subframe for pivotal movement between raised and lowered positions;
a plurality of cutting reels;
means for pivotally securing one of said cutting reels to the outer end of each of said lift arms;
means coupled between each lift arm and said subframe for effecting relative pivotal movement thereof; and
means coupled between said subframe and each lift arm for normally biasing the outer ends of the lift arm and cutting reel suspended thereon toward the lowered position.
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Accused Products
Abstract
A lift arm assembly (30, 32) for a commercial riding mower includes pivotal lift arms (36, 38, 40, 120), each of which is biased downwardly by an adjustable spring arrangement for better control and contact between the underlying turf and the cutting reels supported on the outer ends of the lift arms.
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Citations
13 Claims
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1. A lift arm assembly for a turf mower, having a frame comprising:
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a subframe adapted for attachment to the frame of the mower; a plurality of lift arms arranged generally side-by-side, each lift arm including inner and outer ends; means for pivotally securing the inner end of each lift arm to said subframe for pivotal movement between raised and lowered positions; a plurality of cutting reels; means for pivotally securing one of said cutting reels to the outer end of each of said lift arms; means coupled between each lift arm and said subframe for effecting relative pivotal movement thereof; and means coupled between said subframe and each lift arm for normally biasing the outer ends of the lift arm and cutting reel suspended thereon toward the lowered position. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. A cutting reel lift arm assembly for a turf mower, comprising:
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a plurality of L-shaped lift arms arranged side-by-side, each lift arm including inner and outer ends; means for supporting the inner ends of said lift arms for pivotal movement about generally longitudinal axes between raised and lowered positions; a plurality of cutting reels; means for pivotally securing one of said cutting reels to the outer end of each of said lift arms; means for selectively effecting relative pivotal movement of each of said lift arms; a plurality of springs, each spring being connected at one end to one of said lift arms in order to normally bias the outer end thereof and the respective cutting reel suspended thereon toward the lowered position; and means connected to the other end of each lift arm for selectively adjusting the amount by which said lift arm is biased downwardly by the respective spring. - View Dependent Claims (9, 10, 11, 12)
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13. A cutting reel lift arm assembly for a turf mower, having a frame comprising:
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a transverse subframe adapted for attachment to the frame of the mower; a plurality of L-shaped lift arms arranged generally side-by-side, each lift arm including inner and outer ends; means for pivotally securing the inner end of each lift arm to said subframe for pivotal movement between raised and lowered positions; a plurality of cutting reels; means for securing one of said cutting reels to the outer end of each of said lift arms; means coupled between each lift arm and said subframe for selectively effecting relative pivotal movement thereof; a plurality of springs, each spring being connected at one end to one of said lift arms in order to normally bias the outer end thereof and the respective cutting reel suspended thereon toward the lowered position; and means coupled between said subframe and the other end of each of said springs for selectively adjusting spring tension as desired.
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Specification