Carpet spotting machine with thermostatic protection against overflow
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United States of America Patent
Stats
-
Jul 28, 1998
Grant Date -
N/A
app pub date -
Dec 26, 1996
filing date -
Dec 26, 1996
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A portable carpet cleaning machine has a tank for storing a cleaning solution and a hand-actuatable spray nozzle for applying the solution under pressure. A vacuum motor drives a fan which produces a vacuum in a recovery tank for storing spent solution. Air flows through the recovery tank and the vacuum fan to exhaust. A fast-acting, heat-sensitive thermostatic switch is connected in electrical circuit and in heat transfer relation with the vacuum motor winding to interrupt the flow of current in the motor winding immediately upon sensing a temperature rise in the winding above a predetermined temperature and in a very short time after overflow water is passed from the recovery tank to the vacuum fan.
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