发明名称 |
Vacuum cleaner with suction indicator |
摘要 |
A vacuum cleaner has an adjustable-height suction nozzle. A diaphragm switch is mounted in the housing inside the nozzle and determines a differential air pressure of the operating vacuum cleaner. Voltage source terminals are self-energizing with the rotation of a rotatable brush inside the nozzle and an indicator lamp is illuminated, or extinguished, upon developing a proper suction as establised by the proper adjusted height of the nozzle relative to the floor surface. The foregoing abstract is merely a resume of one general application, is not a complete discussion of all principles of operation or applications, and is not to be construed as a limitation on the scope of the claimed subject matter.
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申请公布号 |
US4955103(A) |
申请公布日期 |
1990.09.11 |
申请号 |
US19880282466 |
申请日期 |
1988.12.09 |
申请人 |
THE SCOTT FETZER COMPANY |
发明人 |
SCOTT, ERNEST R.;MURPHY, JAMES C. |
分类号 |
A47L5/34;A47L9/02;A47L9/04;A47L9/28 |
主分类号 |
A47L5/34 |
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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