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公开(公告)号：US4969229A
公开(公告)日：1990-11-13
申请号：US460168
申请日：1990-01-29
CPC分类号： H02P7/14 , A47L9/2842 , A47L9/2857 , A47L9/2884 , A47L9/2889
摘要： A battery-operated surface treatment apparatus having a booster function, preferably a vacuum cleaner, comprises an electric motor (10) which drives a treatment unit, such as a suction fan. Further, the apparatus comprises a battery-powered power supply unit (11) for the motor and, in addition, the apparatus is provided with a coupling device (18,23) for the activation of the booster function by temporarily connecting a separate battery (14) in series with the batteries in the power supply unit (11).
摘要翻译： PCT No.PCT / SE89 / 00319 Sec。 371 1990年1月29日第 102（e）1990年1月29日PCT PCT。 出版物WO89 / 日期为1989年12月14日。具有增压功能的电池操作表面处理装置，优选为真空吸尘器，包括驱动诸如吸风机等处理单元的电动机（10）。 此外，该装置包括用于电动机的电池供电的电源单元（11），此外，该装置还具有用于通过临时连接单独的电池来激活升压功能的耦合装置（18,23） 14）与电源单元（11）中的电池串联。
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公开(公告)号：US4940474A
公开(公告)日：1990-07-10
申请号：US351077
申请日：1989-05-11
IPC分类号： A47L9/28
CPC分类号： A47L9/2889 , A47L9/2821 , A47L9/2842 , Y02B40/82 , Y10S55/34
摘要： In a suction cleaner comprising a housing (10) having an inlet (11), a filter chamber (12) with a filter bag (13), a suction fan (14) with a motor (15), and an outlet passage (17) through which filtered air passes from the suction fan to an outet (16), the motor is provided with a control circuit (20) adapted to be activated by a first pressure switch (21) which is actuated by the underpressure in the filter chamber (12) in order to control the motor power at a predetermined level. According to the invention, the suction cleaner is provided with a second pressure switch (22) which is actuated by the pressure in the outlet (17) and adapted to activate the control circuit (20) when said pressure exceeds a predetermined level.
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公开(公告)号：US4944065A
公开(公告)日：1990-07-31
申请号：US399315
申请日：1989-08-28
CPC分类号： A47L5/36
摘要： A portable suction cleaner comprises a housing (10) with a filter bag (11) and a suction fan (12) driven by a motor (13). The suction cleaner is characterized in that the housing (10) is provided with a carrier belt (19) adapted to be applied around the bearer's waist or hips.
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公开(公告)号：US4936883A
公开(公告)日：1990-06-26
申请号：US333441
申请日：1989-04-05
IPC分类号： A47L9/14
CPC分类号： A47L9/1427
摘要： In a suction cleaner comprising a housing (10) with a disposable filter bag (13) a movable tube piece (17) is provided which is adapted to enter the inlet opening (14a) of the filter bag. According to the invention, the tube piece (17) is provided with a control means actuatable by a pressure difference, preferably the difference between atmospheric pressure and the underpressure in the suction cleaner housing.
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公开(公告)号：US4910444A
公开(公告)日：1990-03-20
申请号：US205227
申请日：1988-06-09
CPC分类号： B65H75/4486 , B65H75/4436 , B65H75/4484 , H02G11/02 , B65H2403/61 , B65H2403/7254
摘要： Arrangement for winding of an electric cable which arrangement comprises a rotatable drum from which the cable is arranged to be wound off manually, and an electric motor (M) arranged to be connected to a first circuit for driving the drum in the winding direction and arranged to be rotated by the drum during unwinding of the cable. A second circuit (M,1,3,4) comprises besides the motor (M) also a contact means (1) arranged to be closed when the motor (M) is inoperative. During unwinding of the cable from the drum the motor generates a braking moment which increases with the speed of rotation of the motor.The second circuit preferably comprises a voltage dependent switch (3), preferably a Zener-diode, which is arranged to be closed when the voltage generated by the motor (M) during the unwinding exceeds a value corresponding to a predetermined speed of rotation of the drum and, as a consequence, of the motor.
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