Vacuum cleaner with a motor casing

Details Vacuum cleaner with a motor casing Vacuum cleaner with a motor casing

1997-10-31

1999-11-16

Warden, Sr., Robert J.

Brushing, scrubbing, and general cleaning

Machines

With air blast or suction

15339, 15344, 15410, 15DIG10, A47L 932

Patent

active

059834447

DESCRIPTION:

BRIEF SUMMARY
FIELD AND BACKGROUND OF THE INVENTION

The invention relates to a vacuum cleaner having a motor casing, optionally having a connected filter chamber, and an appliance stem, it being possible to plug the appliance stem into a plug receptacle close to the motor casing and a power switch arranged in the motor casing being actuated on plugging in the appliance stem.
Vacuum cleaners of this kind are known. For example, WO 95/28867 has disclosed a vacuum cleaner which has an appliance stem which can be anchored in the motor casing. When plugged into the motor casing or pulled out thereof, the stem actuates a change-over switch arranged in the motor casing. The switch electronically activates or deactivates, depending on the current state, a motor-casing-side power switch. When the appliance stem is plugged into the motor casing, the motor-casing-side power switch is electronically driven into the full load position, so that a further power switch, which is connected in series therewith, in the appliance stem or in a handle of the appliance stem is activated. The electric motor of the vacuum cleaner is driven only via the appliance-stem-side power switch. When the appliance stem is pulled out of the motor casing, the change-over switch is actuated in such a manner that the motor-casing-side power switch is switched over into an OFF position. The latter switch is thus the active power switch. Vacuum cleaners with the appliance stem removed are preferably used for working above the floor, in which case the power of the suction motor is controlled using the motor-casing-side power switch.


SUMMARY OF THE INVENTION

With a view to the prior art described above, a technical problem underlying the invention is that of improving a vacuum cleaner of the type under discussion with regard to switching over the motor-casing-side power switch by means of the appliance stem.
This problem is initially and substantially solved with the present invention which covers the situation where the power switch, which is formed as a sliding switch, has a remote-actuation extension, which is acted on by plugging in the appliance stem with simultaneous actuation of the power switch. Consequently, in this case switching is performed mechanically. There is no need for any electronic components and circuits which are susceptible to faults. The power switch, which is formed as a sliding switch, in the motor casing has a remote-actuation extension which can interact with the appliance stem and with the aid of which the sliding switch is preferably moved into a full load position by plugging the appliance stem into the motor casing. Here too, as already indicated in the prior art, the motor-casing-side power switch is connected in series with a second, appliance-stem-side switch, which is preferably located in the region of an appliance-stem handle. The power switch which is on the handle side when the appliance stem has been plugged in is activated due to the series connection and the full load position of the casing-side power switch. The handle-side power switch can now be used to control the power of the suction motor. The remote-actuation extension may be integrally connected, in terms of material, to the actuation region of the power switch. Furthermore, the design may be such that the motor-casing-side power switch automatically moves back into the OFF position, for example by means of a tension spring or the like, when the appliance stem is removed from the motor casing.
This ensures that the suction motor is switched off when the appliance stem is removed. The power to the suction motor is consequently controlled only by means of the motor-casing-side power switch. In an advantageous development of the subject-matter of the invention, it is provided that the remote-actuation extension has a latching projection at its appliance-stem-side end for interaction with a latching recess on the appliance stem. When the appliance stem is plugged into the motor casing, the latching recess of the appliance stem receives the latching projection of

REFERENCES:
patent: 4052767 (1977-10-01), Dutcher
patent: 4905343 (1990-03-01), Jailor
patent: 5226527 (1993-07-01), Maurer et al.
patent: 5740583 (1998-04-01), Shimada et al.

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