Patent ID: 9175756
Filing Date: 2015-11-03
Classification: A01D,F16H,Y10T

Abstract:
1. A transmission assembly for a self-propelled walk-behind lawn mower, said transmission assembly comprising: a housing; a first actuator attached to said housing; a second actuator attached to said housing; a first pulley rotatably driven by a belt extending between said first pulley and an engine, said first pulley is connected to said housing, said first pulley having an upper pulley member, a lower pulley member, and an effective diameter directly relating to a distance said upper pulley member is spaced apart from said lower pulley member, wherein said second actuator is configured to selectively move one of said upper or lower pulley members relative to the other of said upper or lower pulley members; and a drive shaft partially disposed within said housing, said drive shaft being operatively coupled to said first pulley, wherein rotation of said first pulley is transferred into rotation of said drive shaft to produce a rotational output of said drive shaft to drive a pair of ground-engaging wheels when said housing is in an engaged position, wherein translation of one of said pulley members relative to the other of said pulley members changes said distance between said upper and lower pulley members, wherein said change in said distance changes said effective diameter of said first pulley which results in a change of speed of said rotational output of said drive shaft, and wherein said first actuator is configured to move said housing selectively between an engaged position and a disengaged position, and said second actuator is configured to operate independently of said first actuator.