Pumps – Condition responsive control of pump drive motor – Responsive to change in rate of pump fluid flow
Reexamination Certificate
2005-03-15
2005-03-15
Freay, Charles G. (Department: 3746)
Pumps
Condition responsive control of pump drive motor
Responsive to change in rate of pump fluid flow
C417S044200, C417S044800, C417S415000
Reexamination Certificate
active
06866483
ABSTRACT:
High-pressure cleaning device with an electric motor and a pump for conveying a cleaning fluid, with a plunger, which is displaceable by the cleaning fluid in dependence on its pressure or its flow rate, and with an electric switch, which is actuable by the plunger on its displacement, with electrical leads from the power source and to the windings of the electric motor disposed in the box, with devices attached to the box for fastening the box to the casing of the electric motor and/or pump, characterised in that the switch is disposed in the box, that the walls of the box have openings for the electrical leads, in which outwardly directed contacts are disposed, wherein at least one opening is configured as a multiple plug connection, that the box is fastened via a plug connection to the casing and that the multiple plug connections are disposed on the box in such a manner that at least one matching plug connection fastened to fit on the casing is necessarily connected when the box is fastened to the casing of the electric motor and/or pump.
REFERENCES:
patent: 4675479 (1987-06-01), Wallin
patent: 6062822 (2000-05-01), Nathan
patent: 6273684 (2001-08-01), Jensen et al.
patent: 6745667 (2004-06-01), Dinkel et al.
patent: 44 04 924 (1994-11-01), None
patent: 295 17 915 (1997-04-01), None
Alfred Kaercher GmbH & Co. KG
Freay Charles G.
Lipsitz Barry R.
McAllister Douglas M.
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