Control for pumping devices used in vehicles
First Claim
1. A control for a pumping device for use in vehicles comprising:
- a DC power supply;
a DC motor;
a pumping device for use in the vehicles, including a pump activated by said DC motor for generating a pressure;
a power switch for supplying a DC voltage from said DC power supply to said DC motor;
a pressure-operating unit operable by the pressure from said pump;
an actuator switch for actuating said DC motor; and
a control means for enabling said DC motor for only a given period of time in response to actuating of said power switch when said actuator switch is not actuated.
1 Assignment
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Accused Products
Abstract
Disclosed is a control for a pumping device in a vehicle application in which, upon throwing a power switch (6), a capacitor (85) is charged and a power transistor (81) is rendered conductive thereby supplying a DC voltage from batteries (5) to a DC motor (2). The DC motor drives a pump (1) which in turn feeds pressure to a pressure-operating unit (10) for storage therein. If a given period of time has elapsed after throwing of the power switch, then the voltage charged on the capacitor increases to make a transistor (83) conductive and the power transistor (81) non-conductive. In other words, the DC motor is operated to provide pressure to the pressure-operating unit for only the given period of time after throwing of the power switch. Furthermore, upon closure of a brake actuator switch (4) another transistor (84) becomes conductive and the above transistor (83) becomes non-conductive. This renders the power transistor (81) conductive and supplies the DC voltage to the DC motor.
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Citations
14 Claims
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1. A control for a pumping device for use in vehicles comprising:
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a DC power supply; a DC motor; a pumping device for use in the vehicles, including a pump activated by said DC motor for generating a pressure; a power switch for supplying a DC voltage from said DC power supply to said DC motor; a pressure-operating unit operable by the pressure from said pump; an actuator switch for actuating said DC motor; and a control means for enabling said DC motor for only a given period of time in response to actuating of said power switch when said actuator switch is not actuated. - View Dependent Claims (2, 3, 4)
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5. A control for a pumping device for use in vehicles comprising a motor for activating a pumping means for generating a pressure, used in the vehicle,
power switch means for supplying a voltage from a power supply to said motor, actuator switch means responsive to operation of a device requiring utilization of the pressure generated by the pumping means, controlled switching means connecting said motor to the power supply for energizing said motor, first energizing means for activating said motor in response to activation of said actuator switch means, second energizing means for activating said motor for a predetermined, limited, period of time in response to activation of said power switch means during a condition wherein said actuator switch means is not activated, and timing means for deactivating said motor after passage of said predetermined period of time from activation of said power switch means under said condition wherein said actuator switch means is not activated.
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13. A control for a pumping device for use in vehicles comprising a DC motor for activating a pumping means for generating pressure, used in the vehicle,
power switch means for supplying a voltage from a power supply to said DC motor, actuator switch means responsive to operation of a device requiring utilization of the pressure generated by the pumping means, controlled switching means connecting said motor to the power supply for energizing said motor, first energizing means for activating said motor in response to activation of said actuator switch means, second energizing means for activating said motor for a predetermined, limited, period of time in response to activation of said power switch means during a condition wherein said actuator switch means is not activated, and timing means for activating said motor for a predetermined time period in response to actuation of said power switch means and in response to a deactivated condition of said actuator switch means, and for deactivating said motor after passage of said predetermined time period wherein said power switch means is actuated and said actuator switch means is deactivated, said timing means further including means responsive to said actuator switch means for activating said motor for so long as said actuator switch means is activated and said power switch means is activated.
Specification