Mower drive wheel biasing member being a non-metal biasing member

A mower, comprising:

• a chassis having a front portion and a rear portion;
• a prime mover mounted on the chassis;
• a cutter deck supported by the chassis;
• front wheels attached to the front portion of the chassis;
• two drive wheel assemblies on different sides of the rear portion of the chassis, each drive wheel assembly connected to the chassis by at least one link assembly;
• each link assembly pivotably connected at an inner end to a pivot point on the chassis and pivotably connected at an outer end to a pivot point on the wheel assembly;
• at least one biasing member coupled to each drive wheel assembly, the biasing member being constructed of a non-metal material;
• wherein the drive wheels and front wheels support the chassis for movement over a surface;
• each drive wheel assembly comprising a drive wheel rotated by the prime mover;
• and
• wherein each drive wheel assembly moves relative to the chassis, respectively against and with force exerted by the biasing member, independently of movement of the opposing drive wheel assembly.

A mower comprising;

• a chassis having a front portion, a rear portion, and a longitudinal axis;
• a subframe pivotably connected to the front portion of the chassis for pivoting about the longitudinal axis and adapted to receive two front wheels;
• a prime mover mounted on the chassis;
• the two front wheels attached to different sides of the subframe;
• two drive wheel assemblies, one each on different sides of the rear end of the chassis and connected thereto by at least one link assembly, each link assembly comprising at least one link pivotably connected at an inner end to a pivot point on the chassis and pivotably connected at an outer end to a pivot point on the wheel assembly, each drive wheel assembly comprising a wheel driven by the prime mover;
• a biasing member pressing on each wheel assembly for urging the wheel assembly downwardly, the biasing member being constructed of a non-metal material;
• and
• wherein each drive wheel assembly moves up and down relative to the chassis, respectively against and with force exerted by the biasing member, independently of movement of the opposing wheel assembly.

A mower, comprising:

• a chassis;
• a prime mover mounted on the chassis;
• a cutter deck supported from the chassis;
• two pairs of wheels, one each attached to the chassis at different ends thereof;
• wherein:
• the wheels support the chassis for movement over a surface,
• one of the pairs of wheels comprises drive wheels rotated by the prime mover;
• and each of the one pair of drive wheels is attached to the chassis by at least one link assembly pivotably connected to the chassis and the drive wheel;
• and
• each drive wheel moves up and down relative to the chassis, respectively against and with force transmitted to the wheel by a biasing member, independently of movement of the other wheel of the pair, the biasing member being constructed of a non-metal material.