Endless belt power transmission systems or components – Positive drive pulley or guide roll – With particular belt
Patent
1997-07-09
1999-07-13
Jeffery, John A.
Endless belt power transmission systems or components
Positive drive pulley or guide roll
With particular belt
474157, F16H 706
Patent
active
059218770
ABSTRACT:
A tooth profile for a roller chain sprocket, is provided, which is capable of making the rollers of a chain come into engagement with the teeth of the roller chain sprocket without generating a large noise, and which is capable of making the rollers disengage smoothly from the teeth of the roller chain sprocket. The tooth profile has a first section between a first working point on a clearance flank on the back side with respect to the direction of a movement chain and the tip of a tooth, having a circular profile conforming to a moving path along which the outer circumference of a succeeding roller turns about the center of a preceding roller. The tooth profile has a second section between the first working point to the bottom of the tooth, which is continuous with the first section having a circular profile conforming to the outer circumference of the roller. The tooth profiles a third section between a second working point on a working flank on the forward side with respect to the moving direction of the chain and the tip of the tooth. The third section has a profile which will not interfere with a circular moving path along which the outer circumference of the roller turns about the center of a succeeding roller when disengaging from the sprocket.
REFERENCES:
patent: 2725755 (1955-11-01), Riopelle
patent: 4036071 (1977-07-01), McKnight et al.
patent: 4099424 (1978-07-01), Pemberton
patent: 4116081 (1978-09-01), Luttrell et al.
Charles Marcus
Jeffery John A.
Tsubakimoto Chain Co.
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