发明名称 |
SELF-EVACUATING VACUUM CLEANER |
摘要 |
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 (310) from the bottom of a tank (32) and expels it from the tank. 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. 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.
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申请公布号 |
WO9802081(A1) |
申请公布日期 |
1998.01.22 |
申请号 |
WO1997US12067 |
申请日期 |
1997.07.11 |
申请人 |
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发明人 |
BERFIELD, ROBERT, C.;BUSS, RANDY, L.;CREVLING, ROBERT, L.;SEASHOLTZ, CRAIG, A. |
分类号 |
A47L7/00;A47L11/30;(IPC1-7):A47L11/30 |
主分类号 |
A47L7/00 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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