Patent ID: 9730385
Date: 2017-08-15
CPC Classifications: A01D

Claim:
1. A lawn mower comprising: a blade housing; an engine supported at least in part by the blade housing and configured to rotate a drive shaft; a mobility assembly selectively operably coupled to the engine to provide mobility of the lawn mower responsive at least in part to operation of the engine, wherein the mobility assembly comprises a first set of wheels and second set of wheels; and a rocking transmission operably coupled to the first set of wheels to provide drive power to the first set of wheels via a drive system responsive to engagement of the rocking transmission, wherein the drive system comprises: a drive belt; a drive pulley disposed at the rocking transmission to transfer drive belt motion to power for the first set of wheels via the rocking transmission when the rocking transmission is in an engaged position; a drive shaft pulley operably coupled to the drive shaft to rotate responsive to rotation of the drive shaft, the drive shaft pulley engaging the drive belt responsive to the rocking transmission being in the engaged position; and an idler pulley disposed substantially between the drive pulley and the drive shaft pulley and configured to engage the drive belt when the rocking transmission is in the engaged position, such that a belt wrap around the drive shaft pulley is greater than about 200 degrees and a belt wrap around the drive pulley is greater than about 190 degrees, wherein the rocking transmission is configured to rotate relative to an axle corresponding to the first set of wheels between the engaged position and the disengaged position, wherein rotation of the rocking transmission to the engaged position causes tension to be applied to the drive belt and rotation of the transmission to the disengaged position releases the tension on the drive belt.