Abstract: An operator control system for a self-propelled vehicle such as a lawn mower, wherein the control system includes two opposing and preferably upwardly extending and converging hand grips each having a corresponding drive control lever associated therewith. Each drive control lever may have at least a portion that is parallel to a grip axis of its respective hand grip. Further, each drive control lever may have a pivot axis that is substantially parallel to the corresponding grip axis such that the drive control lever remains substantially parallel to its respective hand grip throughout its travel. A neutral lock is provided to permit locking of each drive control lever in at least one position, e.g., a neutral position. Secondary levers such as operator presence control (OPC) levers may also be included. An OPC lever is associated with each hand grip.

Abstract: Multiple belt mule drive apparatus and systems for use with ground maintenance vehicles are provided. The apparatus may include two endless belts each engageable with a drive sheave of a prime mover and a driven sheave of a cutting deck. Each drive belt may further contact a guide pulley and an idler pulley on a tension side and a slack side of the belt, respectively. In one embodiment, the drive sheave has an axis generally parallel to a longitudinal axis of the vehicle. Preferably, the guide pulley and the idler pulley associated with the first endless belt are, when the vehicle is in an operating configuration, located on a first side of a vertical plane passing through the drive sheave axis, while the guide pulley and idler pulley associated with the second endless belt are located on a second side.

Abstract: An operator control system for a self-propelled vehicle such as a lawn mower is provided wherein the control system includes two opposing and preferably upwardly extending and converging hand grips each having a corresponding drive control lever associated therewith. Each drive control lever may have at least a portion that is parallel to a grip axis of its respective hand grip. Further, each drive control lever may have a pivot axis that is substantially parallel to the corresponding grip axis such that the drive control lever remains substantially parallel to its respective hand grip throughout its travel. A latching device may be provided to permit latching of each drive control lever in two or more positions, e.g., a neutral position and a park position. Secondary levers such as operator presence control (OPC) levers may also be included.

Abstract: An operator control system for a self-propelled vehicle such as a lawn mower is provided wherein the control system includes two opposing and preferably upwardly extending and converging hand grips each having a corresponding drive control lever associated therewith. Each drive control lever may have at least a portion that is parallel to a grip axis of its respective hand grip. Further, each drive control lever may have a pivot axis that is substantially parallel to the corresponding grip axis such that the drive control lever remains substantially parallel to its respective hand grip throughout its travel. In some embodiments, a neutral lock is provided to permit locking of each drive control lever in at least one position, e.g., a neutral position. Secondary levers such as operator presence control (OPC) levers may also be included. In one embodiment, an OPC lever is associated with each hand grip.

Abstract: Vegetation cutting apparatus having a frontal housing deck overlies at least three rotary blade cutters arrayed leftwardly, medially, and rightwardly for simultaneously cutting a continuous transversely extending swath and centifugally discharging the cuttings through a central and rearwardly longitudinally extending cuttings chute. The vertical shaft for each horizontal rotary blade carries a sheave; a belt transmission means, emanating from a powered gearbox, drives the respective blade sheaves and also a reversing sheave, the latter ensuring that the arrayed rotary blades direct vegetation cuttings toward the central discharge chute. A novel spring-loaded device maintains constant tension upon the circuitous belt transmission means.

Abstract: Disclosed is a clutchable pulley system conventionally having an annular first-belt and an annular second-belt, both belts enveloping a plurally-grooved transfer pulley. Also in conventional fashion; the first-belt is constantly tightly trained with a power-source pulley and at least one primary-load pulley; and the second-belt is normally loosely enveloping the plurally-grooved transfer pulley and at lest one secondary-load pulley whereby the secondary-load pulley(s) will not rotate until the second-belt is made to tightly train with the transfer pulley. Departing from the prior art utilization of the idler-pulley principle for controllably tightly entraining the second-belt with the plurally-grooved and secondary-load pulleys, the herein disclosed clutchable pulley system supplants the second-belt idler-pulley by controllably moving the plurally-grooved transfer pulley along an arcuate path.

Abstract: Steering sulkies of the present invention are based upon the "crank/steering-rod" mechanical principle but provide profound refinements thereover. Cranking is provided at first and at second stations. At the first cranking station, preferably overlapping left-link and right-link effect simultaneous rotation of the two sulky wheels about their transversely separated vertical axes in response to towing vehicle steering; such first crank is contingently abuttable against blocking stops to prevent sulky jackknifing. The second crank, which is co-rotatable with the first crank, is connected to the rearward end of elongate steering-rod that herein intersects the frame longitudinal-axis before being terminally connected to a frontal hitch. A preferred hitch provides a convenient, reliable, and multi-directional flexural connection between a lawn-mower or other towing vehicle and the trailing self-steering sulky.