Patent ID: 11867275
Assignee: GATES CORPORATION
Field: Mechanical elements (Mechanical engineering)
Classification: CPC F | IPC F

Claim 0:
1. A tuning device comprising:
a pulley structure for receiving a belt on an external surface;
a torsion spring positioned internal to the pulley structure, with a first end of the torsion spring fixed to a spring retainer fixed to the pulley structure and a second end of the torsion spring fixed to a spring stop ring;
a shaft extending internal to the torsion spring, the shaft having a flange with at least one recess having an arcuate length; and
the spring stop ring having at least one outwardly extending tab configured to fit within the at least one recess in the flange, the tab having an arcuate length less than the arcuate length of the recess,
wherein the pulley structure, the torsion spring and the shaft have a common rotational axis.