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1. (WO1998015219) SELF-EVACUATING VACUUM CLEANER

Pub. No.:    WO/1998/015219    International Application No.:    PCT/US1997/018134
Publication Date: Apr 16, 1998 International Filing Date: Oct 6, 1997
IPC: A47L 11/30
Applicants: SHOP VAC CORPORATION
Inventors: CREVLING, Robert, L.
SEAHOLTZ, Craig, A.
Title: SELF-EVACUATING VACUUM CLEANER
Abstract:
A vacuum cleaner has an electric motor driving an air impeller (74) for creating suction and a pump (104) which draws liquid material through an inlet tube from the bottom of a tank and expels it from the tank (32). The vacuum cleaner also includes a mechanical shut-off and override assembly (144) that automatically shuts off the motor if the liquid level in the tank gets too high. A user, however, can mechanically override this automatic shut-off in order to continue pumping liquid out of the tank (32). A priming apparatus is disposed in the tank in fluid communication with the pump, and a valve is selectively actuable to establish a pressure differential across liquid in the priming apparatus to thereby prime the pump.