Expandable pulley

Details Expandable pulley Expandable pulley

2006-04-25

2006-04-25

Johnson, Vicky A. (Department: 3682)

Endless belt power transmission systems or components

Pulley with expansible rim means or pulleys with alternately...

Structure for variably adjusting radius of rim section

Reexamination Certificate

active

07033293

ABSTRACT:
An expandable pulley. The expandable pulley comprises a plurality of belt blocks arranged about an axis of rotation. Each belt block bears upon a radial surface extending normally to the axis of rotation. Another surface of each belt block bears upon a conical member surface which is moveable coaxially with the axis of rotation. A spring bears upon the conical member which urges the conical member in an axial direction, which in turn urges the belt blocks radially outward to compensate for a belt length change and to maintain a belt tension. An elastic member holds the belt blocks in contact with the conical member.

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