Machine status interlock for reversing fan control

Details Machine status interlock for reversing fan control Machine status interlock for reversing fan control

2006-12-06

2008-12-02

Ip, Paul (Department: 2837)

Electricity: motive power systems

Motor-reversing

C318S268000, C318S260000

Reexamination Certificate

active

07459870

ABSTRACT:
The air circulation fan associated with a radiator of some machines may include an automatic reversing purge cycle that is utilized to dislodge material from the radiator and/or intake screen of the cooling system housing. The purge cycle is locked out when a person may be in the vicinity of the air intake screen of the machine. A controller determines that a person may be in the vicinity of the air intake screen when the machine is idle stationary, such as by determining that a parking brake is engaged. By locking out the purge cycle during machine idle stationary conditions, the risk of blowing dislodged dirt and/or debris onto a person, who may be servicing the machine or accessing an operator station, can be avoided.

REFERENCES:
patent: 5879466 (1999-03-01), Creger et al.
patent: 6188189 (2001-02-01), Blake
patent: 6427461 (2002-08-01), Whinery et al.
patent: 6719207 (2004-04-01), Kloster
patent: 6750623 (2004-06-01), McCauley et al.
patent: 7142967 (2006-11-01), Brandt et al.
Cat Service Information System; Operation and Maintenance Manual; Jan. 12, 2004; pp. 1-37; https://sis.cat.com/sisweb/sisweb/techdoc/techdoc.

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