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
2008-11-07
2011-12-27
Marcelo, Emmanuel M (Department: 3654)
Endless belt power transmission systems or components
Pulley with expansible rim means or pulleys with alternately...
Structure for variably adjusting radius of rim section
C474S052000, C474S053000, C474S070000
Reexamination Certificate
active
08083621
ABSTRACT:
A multiple-ratio drive transmission comprises first and second spaced disc systems, each system of which is composed of three separate discs: (1) a retention disc located at an outermost side; a pin receiving disc located at an innermost side; and, (3) a pin holding disc sandwiched between. Each disc comprises concentric rings of proportionally spaced holes through which corresponding pins are maintained, inserted, retracted, or traversed. As the disc system rotates, each pin on a ring associated for a selected gear passes through a shifting zone in which a ramp mechanism is inserted. A plurality of selection cams rotates to urge a sequential outward deflection of cams. By rotating the selection cam, sequential deflection cams extend into the drive position; they urge a pivoting of a select deflection ramp. The ramp for the pre-selected gear ratio causes the ring to extend to the drive position. As the pins lift, the chain impinges and the gear ratio completely changes during one revolution. All other pins not engaged in the chain slot are held in a neutral or a retracted position by the retention disc.
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Gugliotta, PE, Esq. John D.
Marcelo Emmanuel M
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