Parking brake warning system
First Claim
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1. A parking brake warning system of an automobile having a service brake and a parking brake, comprising:
- an electric power supply source;
a warning lamp;
first and second parking brake operation responsive switches which are cooperating with each other in such a manner that both of said parking brake operation responsive switches are opened or closed concurrently;
an ignition switch;
said warning lamp, said first parking brake operation responsive switch and said ignition switch being connected in series with respect to said electric power supply source;
a stop light;
a service brake operation responsive switch which is closed upon application of the service brake;
said service brake operation responsive switch and said stop light being connected in series with respect to said electric power supply source, said service brake operation responsive switch and said ignition switch being connected in parallel with respect to said electric power supply source;
said second parking brake responsive switch and said stop lamp being connected in series with respect to said electric power supply source, said second parking brake responsive switch and said ignition switch being parallel with respect to said electric power supply source;
a third parking brake operation responsive switch which is closed upon actuation of the parking brake; and
a relay coil;
said third parking brake responsive switch, said relay coil and said ignition switch being connected in series with respect to said electric power supply source;
said first and second parking brake operation responsive switches cooperating with said relay coil such that said first and second parking brake operation responsive switches are closed when said relay coil is energized.
1 Assignment
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Accused Products
Abstract
In order to indicate the operation of a parking brake of an automobile, a switching means responsive to the operation of the parking brake is disposed between the ignition switch and a power side terminal of the stop lights for indicating the braking of the automobile. The operation of the parking brake is thus indicated to the drivers of automobiles coming from behind, thereby preventing a collision from behind or the other accidents.
4 Citations
2 Claims
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1. A parking brake warning system of an automobile having a service brake and a parking brake, comprising:
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an electric power supply source; a warning lamp; first and second parking brake operation responsive switches which are cooperating with each other in such a manner that both of said parking brake operation responsive switches are opened or closed concurrently; an ignition switch; said warning lamp, said first parking brake operation responsive switch and said ignition switch being connected in series with respect to said electric power supply source; a stop light; a service brake operation responsive switch which is closed upon application of the service brake; said service brake operation responsive switch and said stop light being connected in series with respect to said electric power supply source, said service brake operation responsive switch and said ignition switch being connected in parallel with respect to said electric power supply source; said second parking brake responsive switch and said stop lamp being connected in series with respect to said electric power supply source, said second parking brake responsive switch and said ignition switch being parallel with respect to said electric power supply source; a third parking brake operation responsive switch which is closed upon actuation of the parking brake; and a relay coil; said third parking brake responsive switch, said relay coil and said ignition switch being connected in series with respect to said electric power supply source; said first and second parking brake operation responsive switches cooperating with said relay coil such that said first and second parking brake operation responsive switches are closed when said relay coil is energized.
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2. A parking brake warning system of an automobile having a service brake and a parking brake, comprising:
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an electric power supply source; a warning lamp; first and second parking brake operation responsive switches which are cooperating with each other in such a manner that both of said parking brake operation responsive switches are opened or closed concurrently; an ignition switch; said warning lamp, said first parking brake operation responsive switch and said ignition switch being connected in series with respect to said electric power supply source; a stop light; a service brake operation responsive switch which is closed upon application of the service brake, said service brake operation responsive switch and said stop light being connected in series with respect to said electric power supply source, said service brake operation responsive switch and said ignition switch being in parallel with respect to said electric power supply source; said second parking brake operation responsive switch, said ignition switch and said stop lamp being connected in series with respect to said electric power supply source; said first and second parking brake operation responsive switches being closed concurrently upon actuation of the parking brake.
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Specification
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Current AssigneeNissan Motor Co., Ltd.
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Original AssigneeNissan Motor Co., Ltd.
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InventorsTanaka, Toshiyuki
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Primary Examiner(s)Waring, Alvin H.
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Application NumberUS06/263,746Time in Patent Office614 DaysField of Search340/66, 340/69, 340/71, 340/72, 340/81 R, 340/81 F, 340/87, 340/93, 340/95US Class Current340/479CPC Class CodesB60Q 1/44 for indicating braking acti...B60Q 1/486 for indicating that vehicle...
