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US 5,918,344 AGranted
Self-evacuating vacuum cleaner
AssigneeShop Vac Corporation
InventorsRobert L. Crevling, Jr., Craig A. Seasholtz
Life of this patent
Estimating the term…
Abstract
A vacuum cleaner has an electric motor driving an air impeller for creating suction and a pump impeller which is located in the tank and draws liquid material from the bottom of the tank and expels it from the tank. The vacuum cleaner may have an electrical or mechanical shut-off apparatus which turns off the electric motor if the water level in the tank is too high. The shut-off switch may be bypassed by a user to allow the motor to continue driving the pump impeller to remove liquid from the tank.
Claims7
A wet/dry vacuum cleaner for vacuuming liquid or debris, comprising:
- a tank for collecting material;
- an air impeller for creating low pressure in the tank to draw material into the tank;
- a motor driving the air impeller;
- a switch having a first position in which power is provided to the motor and a second position in which power to the motor is interrupted;
- a user-operated actuator mechanism mechanically linked to the switch and capable of moving the switch to the first position or the second position;
- and
- a float mechanically linked to the switch and capable of moving the switch from the first position to the second position.
4 more elements
Dependencies are inferred from the claim text.