Abstract:
A self-cleaning, energy efficient blade assembly (10) for use on lawn maintenance equipment and devices is provided. The blade assembly includes a shell (12) and plurality of blades (16) releasably attachable to the shell, wherein the shell is generally bowl-shaped. The blade assembly may also include a stabilizer ring (14) that is positioned immediately adjacent to the shell for added structural rigidity and strength.
Abstract:
Provided is a snow thrower impeller assembly (24) that defines a mounting slot (84) for a wiper (70). The wiper includes a wiper portion (86) that slides into the mounting slot to mount the wiper to the impeller (54). The wiper contacts an interior wall (56) of an associated impeller housing during rotational operation of the impeller in order to limit a gap (74) between an impeller blade (66) and the interior wall. The wiper can move radially inward and outward to remain in contact with the interior wall without input from the operator. Another embodiment of the impeller assembly includes impeller blades with a first portion (116) and a second portion (118). The second portion extends at a non-zero angle from the first blade portion of the impeller blade. Methods of improving the efficiency of the snow thrower are also provided.
Abstract:
A mower blade assembly (20) attaches to a rotatable spindle (24) and includes a mounting plate (54) which defines a first pin aperture (68). The mounting plate (54) and a retaining plate are attached to the rotatable spindle (24). The retaining plate (70) defines a second pin aperture (76). A movable pin plate (78) comprises a pin (80). A blade (26) is selectively attachable to the mounting plate. The blade defines a retaining plate aperture and a third pin aperture. A biasing member (98) urges the movable pin plate from a disengaged position to an engaged position. The pin is engageable with the pin apertures for mounting and retaining the cutting blade (26) to the mounting plate. The blade is attached by moving the blade over the retaining plate aperture, urging the movable pin plate to the disengaged position, rotating the blade, and releasing the movable pin plate. Another embodiment includes a force finger (204).
Abstract:
A belt drive system (21) for a vehicle (10) such as a riding lawn mower that includes a prime mover (12) and a double-stacked output pulley (42) rotated by the prime mover (12). The belt drive system (21) also includes a transaxle (20) having an input shaft (46) and a double- stacked input pulley (44) connected to the input shaft (46). A forward belt drive system (100) operatively connects a first sheave (102) of the output pulley (42) to a first sheave (104) of the input pulley (44) and a reverse belt drive system (200) operatively connects a second sheave (202) of the output pulley (42) to a second sheave (204) of the input pulley (44). The forward belt drive system (100) rotates the input shaft (46) of the transaxle (20) in a first direction to drive the vehicle (10) in a forward direction and the reverse belt drive system (200) rotates the input shaft (46) in the opposite direction to drive the vehicle (10) in a reverse direction.
Abstract:
A six wheeled off-road utility vehicle includes a frame upon which is mounted an engine for use in providing locomotive power to drive the vehicle. A steering wheel is also connected to a steering system for use in providing steering for the ground engaging wheels. Turning the steering wheel rotates a steering column rod about a longitudinal axis and rotates a pinion gear. The first and second front ground engaging wheels are connected to a first axle and first and second rear ground engaging wheels are connected to the second axle. A mechanical linkage is operatively connected between the first and second front ground engaging wheels and the first and second rear ground engaging wheels. The mechanical linkage is engaged in a first linkage direction, the first and second front ground engaging wheels pivot in a first steering direction, and the first and second rear ground engaging wheels pivot in a second steering direction. A steering angle A1 of the first and second front ground engaging wheels forms a steering ratio with the steering angle A2 of the first and second rear ground engaging wheels in the range substantially between 1 and 4.
Abstract:
A high efficiency turf maintenance apparatus having low power consumption and good cutting performance including a bagging apparatus for turf clippings is presented herein. A blade configuration is disclosed to provide lift and to propel turf clippings from a mow deck (710) to the bagging apparatus. Further, the blade configuration can be implemented with minimal increase in power consumption, allowing the bagging apparatus to be utilized with an electric motor power source with little or no impact on battery life.
Abstract:
A maintenance vehicle having a frame supported by a pair of traction wheels and at least one steered wheel. The maintenance vehicle also includes a steering assembly having a pair of control levers for directly controlling a pair of transmissions that drive the traction wheels, a pair of sensors for measuring a characteristic of each transmission, the sensors being operatively connected to a system controller which generates an output signal to a steering controller for independently controlling the steering of the steered wheel(s).
Abstract:
A snow thrower having a power supply with a crankshaft operatively connected thereto is provided. The snow thrower further includes an impeller operatively connected to a first drive shaft (28). A first drive train (250) operatively connects the crankshaft to the first drive shaft to provide a first rotational speed of the first drive shaft and impeller. An impeller speed adjustment assembly includes a second drive train (243) that operatively connects the crankshaft to the first drive shaft to provide a second rotational speed of the first drive shaft and impeller therebetween, wherein the first and second rotational speeds of the first drive shaft and impeller are different.
Abstract:
A high-efficiency lawn maintenance tool (20) includes a frame (24, 28) and a deck (28) attached to the frame (24, 28). A plurality of ground engaging members (26) are attached to the frame (24, 28), and a power source (34) is attached to one of the frame (24, 28) and the deck (28), wherein the power source (34) is connected to a drive shaft (36) that passes through the deck (28). A high-efficiency blade (56) system is attached to the drive shaft (36). A controller is electrically connected to the power source (34), and the controller is configured to correlate the load and/or the mower (20) groundspeed independent of an operator's control. Other examples include reduced operating speeds of the drive shaft (36) and commensurate reduced tip speeds of a set of cutting blades (56).
Abstract:
A multiple-stage snow thrower having a housing, a power supply operatively connected to a plurality of drive shafts for rotating a plurality of stage assemblies. Each stage assembly of the multiple-stage snow thrower is configured to move snow either axially along the axis of rotation or radially away from the axis of rotation. The first stage assembly is configured to expel snow from the housing, thereby throwing the snow away from the snow thrower. The second, third, and fourth stages assemblies are configured to push the snow toward the longitudinal centerline of the housing and then rearwardly toward the first stage assembly.