专利快速检索-快速检索全球专利，免费商用专利数据库-IPRDB

1. 发明授权

US3654518A Fast acting solid state circuit breaker 失效
标题翻译：快速动作固态断路器
公开(公告)号：US3654518A
公开(公告)日：1972-04-04
申请号：US3654518D
申请日：1970-09-17
申请人： CATERPILLAR TRACTOR CO
发明人： PHELPS WELDON L , SMITH KERWYN B
IPC分类号： H02H3/087 , H02H3/08
CPC分类号： H02H3/087
摘要： A circuit breaker includes a voltage sensing resistor and a transistor for transmitting current from a DC power source to a load. Conduction through the transistor is controlled by additional solid state circuit elements which respond to an increased voltage drop across the resistor by stopping conduction through the transistor with a regenerative feedback action whereby the current from the source to the load is cut off abruptly in response to an increase of the load current above a predetermined level. The circuit breaker has no moving contacts or the like and resets automatically when the circuit from the power supply to the load is opened by switch means or the like. The circuit breaker dissipates very little power in either the open or closed condition and the components may be included with the load circuit itself whereby the circuit breaker cannot readily by bypassed by a jumper connection or the like.
摘要翻译：断路器包括电压感测电阻器和用于将电流从直流电源传输到负载的晶体管。通过晶体管的导通由额外的固态电路元件控制，该固体电路元件通过再生反馈动作阻止通过晶体管的导通来响应电阻器上的增加的电压降，从而从源极到负载的电流响应于负载电流的增加高于预定水平。当从电源到负载的电路通过开关装置等打开时，断路器没有移动触点等并自动复位。断路器在打开或关闭状态下耗散很小的功率，并且组件可以包括在负载电路本身中，由此断路器不能容易地被跳线连接等旁路。

2. 发明授权

US3514622A Actuator circuit for a vehicle horn 失效
标题翻译：车辆执行器电路
公开(公告)号：US3514622A
公开(公告)日：1970-05-26
申请号：US3514622D
申请日：1968-04-29
申请人： CATERPILLAR TRACTOR CO
发明人： COSTA PHILIP J , PHELPS WELDON L
IPC分类号： G08B3/10 , B60G5/00
CPC分类号： G08B3/10 , Y10T307/872 , Y10T307/957

3. 发明公开

EP0051601A4 FAILSAFE WHEEL SLIP CONTROL SYSTEM AND METHOD OF OPERATING SAME. 失效
标题翻译：准确的车轮打滑和实现过程。
公开(公告)号：EP0051601A4
公开(公告)日：1985-04-25
申请号：EP81900678
申请日：1980-05-07
申请人： CATERPILLAR TRACTOR CO
发明人： MILLER ROBERT G , PHELPS WELDON L
IPC分类号： B60K23/04 , B60K17/16 , B60T20060101 , B60T8/175 , B60T8/48 , B60T8/58 , B60T8/82 , B60T8/88 , F16H48/12 , F16H48/18 , F16H48/20 , B60T8/10
CPC分类号： B60T8/175 , B60T8/4809 , B60T8/885 , B60T2270/416
摘要： A slip control system for vehicles having spaced apart drive wheels (200, 202) driven by an input shaft (204) through a differential unit (206) including means (220) for calculating wheel slip according to the ratio of wheel speeds, means (220, 230, 232) for entering a slip control mode wherein a braking force is applied to the slipping wheel and incrementally varied on a periodic review basis according to recalculated slip values. If slip increases or holds steady, the brake force is incrementally increased. As slip becomes less, the brake force is incrementally reduced, the particular increments of force reduction being selected in accordance with successive measurements of slip. A drive shaft signal (226) is compared to the high wheel speed signal to identify a wheel speed transducer failure.

4. 发明公开

EP0179066A4 MULTIPLE THRESHOLD WHEEL SLIP CONTROL APPARATUS AND METHOD. 失效
标题翻译：装置和方法与多个阈值车轮打滑。
公开(公告)号：EP0179066A4
公开(公告)日：1987-01-20
申请号：EP84902886
申请日：1984-07-12
申请人： CATERPILLAR TRACTOR CO
发明人： PHELPS WELDON L , STAHL ALAN L
IPC分类号： B60T8/58 , B60T8/175 , B60T8/1761 , B60T8/48 , B60T8/60 , B60T8/72 , B60T8/90
CPC分类号： B60T8/175 , B60T8/4809

5. 发明公开

EP0054029A4 METHOD AND APPARATUS FOR CONTROLLING DIFFERENTIALLY DRIVEN WHEEL SLIP. 失效
标题翻译：方法和设备控制差动滑动驱动轮。
公开(公告)号：EP0054029A4
公开(公告)日：1985-06-10
申请号：EP81900679
申请日：1980-05-07
申请人： CATERPILLAR TRACTOR CO
发明人： MILLER ROBERT G , MYERS ALLEN D , PHELPS WELDON L , SIEVING ALFRED W
IPC分类号： B60K17/16 , B60K23/04 , B60T20060101 , B60T8/00 , B60T8/175 , B60T8/1761 , B60T8/26 , B60T8/48 , B60T8/82 , B60T8/86 , F16H48/18 , F16H48/20 , B60T8/10
CPC分类号： B60T8/175 , B60T8/17616 , B60T8/4809 , Y10S303/06
摘要： A slip control system for vehicles having spaced apart differentially driven wheels (200, 202) including means (220) for calculating wheel slip according to the ratio of wheel speeds, means (242, 230, 232) for entering a slip control mode wherein a braking force is applied to the slipping wheel and incrementally varied on a periodic review basis according to recalculated slip values. If slip increases or holds steady, the brake force is incrementally increased. As slip becomes less, the brake force is incrementally reduced, the particular increments of force reduction being selected in accordance with successive measurements of slip. A drive shaft signal (226) is compared to the high wheel speed signal to identify a wheel speed transducer failure.

6. 发明公开

EP0077770A4 PULSE WIDTH MODULATED CONSTANT CURRENT SERVO DRIVER. 失效
标题翻译：功率控制脉宽调制恒定电流。
公开(公告)号：EP0077770A4
公开(公告)日：1983-05-16
申请号：EP81901581
申请日：1980-12-29
申请人： CATERPILLAR TRACTOR CO
发明人： PHELPS WELDON L
IPC分类号： F15B13/044 , F16K31/02 , F16K31/06 , G05D7/06
CPC分类号： G05D7/0635 , F16K31/0675
摘要： A method and apparatus for controlling a coil (40) operated hydraulic valve (48) employs a constant current source (36) to consistently control valve response (P u) irrespective of variations in power supply voltage and coil resistance (R u). A switching circuit (58) controls the delivery of constant current pulses from the current source (36) to the coil (40) in accordance with a series of pulse width modulated control signals whose duty factors (t u/t u) are proportionate to preselected values of hydraulic output pressures (P u) developed by the valve (48). A voltage regulator circuit (38) provides regulated supply voltage to the constant current source (36) in order to reduce variations in the coil current (I u) at small pulse widths.

7. 发明专利

CA1112337A ELECTRONIC DIRECTIONAL CONTROL CIRCUIT 未知
公开(公告)号：CA1112337A
公开(公告)日：1981-11-10
申请号：CA330414
申请日：1979-06-22
申请人： CATERPILLAR TRACTOR CO
发明人： PHELPS WELDON L
IPC分类号： B66F9/24 , F16H59/08 , F16H61/02 , F16H61/18 , G05B24/02
摘要： ELECTRONIC DIRECTIONAL CONTROL CIRCUIT Lift trucks (10) have many hand control levers which are manipulated to hoist a load, propel the lift truck (10) forward and rearward, and steer the lift truck (10). Some operations must be performed sequentially rather than simultaneously which increases loading time. An electronic directional control circuit(34) includes apparatus (36) for producing first and second command signals, apparatus (38) for producing first and second outputs in response to the first and second command signals, and apparatus (40) for delaying production of a preselected one of the first and second outputs a preselected time sufficient for the selected output to decrease to a preselected magnitude prior to the production of the other of the first and second outputs. The electronic directional control circuit (34) is useable with vehicles (10) which initiate the command signals with a foot operated pedal (12) while leaving the hands free for simultaneously operating other controls.

8. 发明专利

AU3155184A MULTIPLE THRESHOLD WHEEL SLIP CONTROL APPARATUS AND METHOD 未知
公开(公告)号：AU3155184A
公开(公告)日：1985-11-28
申请号：AU3155184
申请日：1984-07-12
申请人： CATERPILLAR TRACTOR CO
发明人： PHELPS WELDON L , STAHL ALAN L
IPC分类号： B60T8/58 , B60T8/175 , B60T8/1761 , B60T8/48 , B60T8/60 , B60T8/72 , B60T8/90 , B60T8/10

9. 发明专利

AU545575B2 METHOD AND APPARATUS FOR CONTROLLING DIFFERENTIALLY DRIVEN WHEEL SLIP 未知
公开(公告)号：AU545575B2
公开(公告)日：1985-07-18
申请号：AU6928481
申请日：1980-05-07
申请人： CATERPILLAR TRACTOR CO
发明人： MILLER ROBERT G , MYERS ALLEN D , PHELPS WELDON L , SIEVING ALFRED W
IPC分类号： B60K17/16 , B60K23/04 , B60T20060101 , B60T8/00 , B60T8/175 , B60T8/1761 , B60T8/26 , B60T8/48 , B60T8/82 , B60T8/86 , F16H48/18 , F16H48/20

10. 发明专利

CA1158345A PULSE WIDTH MODULATED CONSTANT CURRENT SERVO DRIVER 未知
公开(公告)号：CA1158345A
公开(公告)日：1983-12-06
申请号：CA383882
申请日：1981-08-14
申请人： CATERPILLAR TRACTOR CO
发明人： PHELPS WELDON L
IPC分类号： B60T8/1761 , F15B9/09 , F15B11/00
摘要： PULSE WIDTH MODULATED CONSTANT CURRENT SERVO DRIVER A method and apparatus for controlling a coil operated hydraulic valve employs a constant current source to consistently control valve response irrespective of variations in power supply voltage and coil resistance. A switching circuit controls the delivery of constant current pulses from the current source to the coil in accordance with a series of pulse width modulated control signals whose duty factors are proportionate to preselected values of hydraulic output pressures developed by the valve. A voltage regulator circuit provides regulated supply voltage to the constant current source in order to reduce variations in the coil current at small pulse widths.

你已经成功收藏专利！

检索式保存成功!

IPRDB

热门服务

关于我们

友情链接

联系方式