Patent ID: 9709154
Date: 2017-07-18
CPC Classifications: F16B,F16C,F16H

Claim:
1. A pulley device for a chain or belt, comprising: an inner ring; an outer ring; at least one row of rolling elements mounted between the inner ring and the outer ring; a pulley secured in rotation with the outer ring and provided with an outer radial surface for engaging with a chain or belt; a screw comprising a head and a stem housed radially in the inner ring and provided with an outer peripheral groove; a mounting support element provided with a receiving bore for the stem of the screw; and an axial retaining member keeping the stem of the screw inside the receiving bore, the axial retaining member being engaged in the outer peripheral groove of the stem of the screw, wherein the mounting support element is provided with a cavity that emerges in the receiving bore, wherein, when the screw is installed in the receiving bore of the device, the outer peripheral groove is axially across from the cavity of the mounting support element and the axial retaining member is also engaged in the cavity of the mounting support element, wherein a first axial length of the axial retaining member is one of equal to or slightly larger than a second axial length of the cavity of the mounting support element, wherein the mounting support element defines a housing for receiving the head of the screw.