High-pressure cleaning apparatus

Details High-pressure cleaning apparatus High-pressure cleaning apparatus

1998-01-22

2000-05-16

Yuen, Henry C.

Pumps

Condition responsive control of pump drive motor

Responsive to change in rate of pump fluid flow

200 81R, F04B 4900

Patent

active

060628227

ABSTRACT:
In a high-pressure cleaning apparatus comprising an electric motor, a high-pressure pump driven by the electric motor, and an automatic switching-off means for the electric motor including a switch actuatable by an actuating element moveable in dependence upon the pressure or the flow of the liquid being conveyed by the high-pressure pump, in order to reduce the switching expenditure it is proposed that a switching-off element which is manually actuatable on the high-pressure cleaning apparatus be associated with the same switch so that in one position of the switching-off element, the switch cuts off the power supply to the electric motor independently of the pressure or the flow of the liquid being conveyed, whereas in the other position the switch is actuatable by the actuating element.

REFERENCES:
patent: 3563671 (1971-02-01), Weber
patent: 3739810 (1973-06-01), Horan, Jr.
patent: 3782858 (1974-01-01), Deters
patent: 3973877 (1976-08-01), Taki
patent: 4247260 (1981-01-01), Schonwald et al.

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