Continuously variable transmission down shift control

Machine element or mechanism – Rotary member or shaft indexing – e.g. – tool or work turret – Preselected indexed position

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474 12, 474 18, 474 28, B60K 4112

Patent

active

044754167

ABSTRACT:
A continuously variable transmission of the expansible frusto-conical pulley type having fluid expansion chambers controlling expansion and contraction of the V-groove includes a fluid control circuit having a ratio control pressure regulator valve, a ratio relief valve connected across the ratio control regulator valve, providing for rapid down shift of the pulley combination while maintaining non-slip engagement between pulley discs and a flexible transmission band of trapezoidal cross section.

REFERENCES:
patent: 3043152 (1962-07-01), Karig et al.
patent: 3081642 (1963-03-01), Emerson
patent: 3115049 (1963-12-01), Moan
patent: 3451283 (1969-06-01), Rattunde
patent: 3596528 (1971-08-01), Dittrich et al.
patent: 3893344 (1975-08-01), Dantlgraber et al.
patent: 3918312 (1975-11-01), Espenschied et al.
patent: 4152947 (1979-05-01), van Deursen et al.
patent: 4369675 (1983-01-01), van Deursen
patent: 4387608 (1983-06-01), Mohl et al.

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