公开(公告)号：US6024172A

公开(公告)日：2000-02-15

申请号：US071044

申请日：1998-05-01

申请人： Daniel Lee

发明人： Daniel Lee

IPC分类号： E21B33/06

CPC分类号： E21B33/06 ,  E21B33/062

摘要： The invention provides a versatile blow-out preventer having a hydraulically activated bladder and a mechanically operated set of rams mounted in a single body, occupying a minimum of vertical space, and being adapted to operate whether or not there is equipment such as pump rods or cables in the well head.

摘要翻译： 本发明提供了一种多功能防喷器，其具有液压活化气囊和机械操作的一组安装在单个主体中的凸起，占据最小的垂直空间，并适于操作是否存在诸如泵杆或设备 电缆在井口。

公开(公告)号：US5656871A

公开(公告)日：1997-08-12

申请号：US520419

申请日：1995-08-29

申请人： Daniel Lee

发明人： Daniel Lee

IPC分类号： H02J9/06 ,  H02J7/00

CPC分类号： H02J9/06 ,  Y10T307/615 ,  Y10T307/625

摘要： An uninterrupted power supply with improved circuit arrangement includes a controller, a detecting circuit and a control circuit. When the incoming AC voltage is normal and in a positive half-wave cycle, an input pin of the controller detects the actual voltage level of the secondary voltage of a transformer. When the incoming AC voltage is in a negative half-wave cycle, the input pin of the controller receives a sinusoidal input waveform voltage based on the voltage Vcc which acts as a reference voltage, and the controller processes the sinusoidal input waveform voltage by subtracting the secondary voltage of the transformer from the voltage reference Vcc to obtain a sinusoidal half-wave voltage with positive half-wave cycle. The controller combines the positive and negative half-wave cycle signals to obtain a composite voltage, and then calculates the RMS value of the composite voltage so as to determine the changing situation of the incoming AC voltage. The controller further actuates a series of transistors to energize an autotransformer to supply a stable regulated voltage.

摘要翻译： 具有改进的电路布置的不间断电源包括控制器，检测电路和控制电路。 当输入交流电压正常并处于正半波周期时，控制器的输入引脚检测变压器次级电压的实际电压电平。 当输入的交流电压处于负半波周期时，控制器的输入引脚基于作为参考电压的电压Vcc接收正弦输入波形电压，控制器通过减去正弦输入波形电压 变压器的二次电压从参考电压Vcc获得正半波周期的正半波电压。 控制器组合正和负半波周期信号以获得复合电压，然后计算复合电压的RMS值，以确定输入交流电压的变化情况。 控制器进一步致动一系列晶体管以使自耦变压器通电以提供稳定的调节电压。