Temperature sensitive decoupling method for viscous fan drives

Details Temperature sensitive decoupling method for viscous fan drives Temperature sensitive decoupling method for viscous fan drives

1998-07-24

1999-12-07

Lorence, Richard M.

192 clutches and power-stop control

Clutches

Fluent material

192 58682, 192 588, 192 82T, F16D 3502

Patent

active

059967552

ABSTRACT:
A fluid coupling device of the type including an external bimetal coil (45) operable to move a valve arm (41) from a closed position (FIG. 4) toward an open position (FIG. 5) as the external temperature increases. An internal bimetal coil (61) is provided within the fluid reservoir chamber (35), having an inner end (65) fixed to a disc-like member (63) which rotates with the valve shaft (39), and an outer end (67) fixed to the valve arm (41). The internal coil (61) is preloaded such that, when the internal fluid temperature increases, the preload is relieved, and the valve arm (41) rotates from its open position (FIG. 5) back toward a closed position (FIG. 6), thus protecting the fluid from overheating and being damaged.

REFERENCES:
patent: 3055473 (1962-09-01), Oldberg et al .
patent: 3363734 (1968-01-01), Sabat
patent: 4606445 (1986-08-01), Rockey
patent: 4662495 (1987-05-01), Brunken
patent: 5232074 (1993-08-01), Watanabe
patent: 5248018 (1993-09-01), Debrabander

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