Combine harvester with dual range variable speed blower

Details Combine harvester with dual range variable speed blower Combine harvester with dual range variable speed blower

1991-04-25

1993-03-09

Britts, Ramon S.

Harvesters

Motorized harvester

Including driven air-blower unit

56 165, 56DIG6, 56DIG8, 474 24, 474 29, 474 37, A01D 8710

Patent

active

051917556

ABSTRACT:
A variable diameter belt type power transfer assembly having a drive sheave and a driven sheave, both of which are adjustable and include a pair of opposing coaxial flanges, one of which is axially movable relative to the other, is disclosed wherein both flanges of the drive sheave are provided with first and second belt engaging surfaces flaring radially outwardly with respect to each other so as to define first and second variable diameter belt receiving grooves therebetween. A dual range of velocity ratios between the drive sheave and the driven sheave is obtainable by selectively positioning a drive belt in the respective variable diameter belt receiving grooves.

REFERENCES:
patent: 3804231 (1974-04-01), Maiste
patent: 3881370 (1975-05-01), Vogelaar et al.
patent: 4194346 (1980-03-01), Ingalls
patent: 4303079 (1981-12-01), Claas et al.
patent: 4393644 (1983-07-01), Martenas
patent: 4906219 (1990-03-01), Matousek et al.

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