Back to results
US 5,172,786 AGranted
V belt type automatic transmission system
AssigneeYamaha Hatsudoki Kabushiki Kaisha
InventorsTadakazu Ishibashi, Nozomu Kishira, Yoshiharu Isaka
Life of this patent
Estimating the term…
Abstract
Several embodiments of snowmobiles driven by an engine and variable belt transmission mechanism wherein the variable belt transmission has its input shaft journaled for rotation in the crankcase of the engine and driven from the engine crankshaft through a gear reduction so that the transmission loads are not carried by the crankshaft and wherein the crankshaft torsional vibrations are not transmitted to the transmission input shaft.
Claims20
An engine and transmission assembly comprising:
- an internal combustion engine;
- said engine including a crankcase;
- and an engine output shaft journaled within said crankcase and rotatable about an axis;
- and a transmission input shaft journaled within said crankcase;
- wherein said engine output shaft and said transmission input shaft are separate members, spaced apart from one another within said crankcase;
- and further comprising means for driving said transmission input shaft from said engine output shaft, a driving variable pulley on said transmission input shaft, a transmission output shaft journaled for rotation about an axis parallel to the axis of rotation of said transmission input shaft, a variable driven pulley on said transmission output shaft, and belt means for driving said variable driven pulley from said variable driving pulley.
3 more elements
A snowmobile, having an engine and transmission assembly comprising an internal combustion engine;
- said engine including a crankcase;
- and an engine output shaft journaled within said crankcase and rotatable about an axis;
- and a transmission input shaft journaled within said crankcase;
- wherein said engine output shaft and said transmission input shaft are separate members, spaced apart from one another within said crankcase;
- and further comprising means for driving said transmission input shaft from said engine output shaft, a driving variable pulley on said transmission input shaft, a transmission output shaft journaled for rotation about an axis parallel to the axis of rotation of said transmission input shaft, a variable driven pulley on said transmission output shaft, and belt means for driving said variable driven pulley from said variable driving pulley;
- and further having a drive belt and wherein the drive belt is driven from the transmission output shaft.
3 more elements
Dependencies are inferred from the claim text.