Abstract:
Control circuits for a riding lawn mower providing an override condition for selectively allowing the cutting blades of the lawn mower to operate when the vehicle is traveling in reverse. The circuits incorporate a multi-position ignition switch, an override switch, a vehicle reverse switch, a PTO switch and a park brake switch. In one aspect of the invention, the control circuits disable the engine when the vehicle is placed in reverse with the PTO engaged and without the override condition having been established. In another aspect of the invention, an electric PTO clutch is disabled when the vehicle is placed in reverse with the PTO engaged and without the override condition having been established. The override condition is terminated when the ignition switch is moved away from the override position, or when the operator activates the park brake switch.
Abstract:
A spark plug that simultaneously produces a plurality of sparks in a combustion chamber of an internal combustion engine using a plurality of electrodes in series. The spark plug includes an insulative body, a main electrode, a ground, and a plurality of intermediate electrodes partially embedded in the insulative portion of the spark plug so that the high voltage power jumps a plurality of gaps between the electrodes and then to ground at a final gap. Preferably, the intermediate electrodes are generally U-shaped and are sealed in the insulative portion of the spark plug body such that the tips of the legs extend from a combustion chamber facing surface of the spark plug. The tips of the intermediate electrodes are spaced apart from one another to form spark gaps between adjacent tips.
Abstract:
A muffler for coupling to an exhaust port of an internal combustion engine. The muffler includes a housing having an exhaust inlet configured to receive exhaust gas from the engine, at least one internal expansion chamber and an outlet opening. The muffler further includes a diffuser cover attached to the housing over the exhaust opening of the housing forming an exhaust outlet of the muffler. The diffuser cover forms a trap chamber, a restricted throat and an ejector portion. The ejector portion is configured to draw in ambient air through an air inlet to cool the exhaust gas as it passes through the exhaust outlet. The restricted throat is positioned downstream from said trap chamber so as to increase the velocity of the exhaust gas as the exhaust gas passes through the restricted throat and into the ejector portion so as to aid in drawing in ambient air.
Abstract:
A method of manufacturing injection-molded components having complex features is disclosed. Prior methods typically require the use of a three-piece mold system to form an injection molded component having a complex feature, such as a lawn mower hood having a parabolic shaped front. With the development of a new rigid type of reflective material the present method can thereby utilize a two-piece mold system to form an injection molded component having complex features such as a lawn mower hood (30) having a C-shaped open cavity (36) located at the front of the hood. According to the invention, a reflective material having a certain degree of flexibility is inserted into the C-shaped open cavity (36), said reflective material having at least a hole receiving a headlight (32).
Abstract:
An apparatus, systems and methods for automatically disengaging and re-engaging a cutting implement on a mowing machine by disconnecting and connecting, respectively, electrical power to an implement drive means. Power to the implement drive means is disconnected or connected according to gear positions of transmission control levers provided on the mowing machine. At designated gear positions, cut-out switches associated with the implement drive means are effective to interrupt power to the implement drive means. Repositioning the control levers to non-designated gear positions restores power to the implement drive means. The automatic disengagement/re-engagement of the cutting implement based on the gear position of transmission control levers may be used for two lever zero-turn-ride-on mowing machines or more traditional single lever ride-on mowing machines.
Abstract:
A vibration damping assembly may be used with a lawn tractor to reduce vibrations caused by operation of a mower deck. A pulley belt drive system includes a pulley belt connecting a drive pulley to one or more driven pulleys. The vibration damping assembly includes a first idler pulley and a second idler pulley to dampen associated vibrations caused during operation of the mower deck. The vibration damping assembly further includes biasing means, such as springs, to keep the first and second idler pulleys in contact with the pulley belt.
Abstract:
A tiller assembly (30) includes a tine assembly (36) that is rotatably connected to a tiller body (34) and the tine assembly (36) includes at least one tine for use in tilling associated soil. A hydraulic system (50) is operatively connected to the tine assembly (36) and includes a hydraulic pump (32), a hydraulic motor (42) for use in rotating the tine assembly (36) in first and second directions, a control valve (44), and hydraulic hose for use in communicating hydraulic fluid (48) between the hydraulic pump (32), the hydraulic motor (42), and the control valve (44). The control valve (44) may be positioned on-the-go into a first position thereby causing the tine assembly (36) to rotate in a first direction and into a second position thereby causing the tine assembly (36) to rotate in a second direction. The tiller assembly (30) may also include a roller assembly (70) that has a roller frame (72) pivotably connected to the tiller body (34). The roller assembly (70) also includes a roller (78) that is rotatably connected to the roller frame (72) and a spring for use in maintaining the roller (78) against the soil. The roller (78) has a contact surface for use in repacking the tilled soil. The spring permits the roller frame (72) to move with respect to the tiller body (34).
Abstract:
An automated steering device is provided usable in conjunction with power equipment machines. By way of example, the automated steering device can provide user-assisted steering for a power equipment machine to maintain tight parallel paths. The user-assisted steering can be defined relative to an initial vector traversed through user directed operation of the power equipment machine, independent of or at least in part independent of a predefined area of operation for the power equipment machine. Position location data refined by local terrestrial positioning system correction devices, or onboard rotational correction devices can be provided to obtain high positioning accuracy, and minimal path deviation. As a result, highly accurate pathing can be provided by way of the disclosed automated steering devices.
Abstract:
A machine vision device is provided usable in conjunction with power equipment machines. By way of example, an array of sensors can be deployed to detect proximity of objects to the power equipment machine, and issue an alert in response to detecting an object within a threshold distance. The alert can be utilized by the power equipment machine to take corrective action to mitigate or avoid running over or striking the object. Sensors having respective fields of view can be arranged along an arc to facilitate machine vision of a spatial volume in a proximity of the machine, and ranging determinations can be coupled with low cost processing devices to facilitate a machine vision solution far more cost effective than other technologies in the art.
Abstract:
A passive self-adjusting seat assembly for a lawn maintenance vehicle having a frame. The passive self-adjusting seat assembly includes a base, a guide assembly attached to the base, and a platform assembly that is selectively movable or slidable relative to the guide assembly in order to maintain an operator in an upright or substantially vertical orientation as the lawn maintenance vehicle traverses uneven or sloped ground. The seat assembly further including a locking assembly for selectively locking the sliding or movement of the platform assembly relative to the guide assembly.