Electrical transmission or interconnection systems – Vehicle mounted systems – Automobile
Reexamination Certificate
1999-07-01
2001-07-17
Paladini, Albert W. (Department: 2841)
Electrical transmission or interconnection systems
Vehicle mounted systems
Automobile
C307S127000, C320S165000, C439S504000
Reexamination Certificate
active
06262492
ABSTRACT:
BACKGROUND OF THE INVENTION
The present invention relates to a battery jumper cable, and more particularly to a car battery jumper cable which can automatically recognizes voltage polarity when installed, enabling a power source to be accurately coupled to the car battery to be rescued.
Following fast development of industry, a car has become the requisite transportation vehicle of most people. The power of a car is mainly provided by a car battery. If the battery of a car fails, or the engine of the car fails to charge the battery, the battery cannot provide the necessary working voltage to start the car. In such a case, a jumper cable may be used to couple a power source (normally, the battery of another car) to the battery of the car in trouble. A jumper cable for this purpose generally comprises a pair of conductors, and two pairs of clips at two opposite ends of each of the pair of conductors for connection to the positive and negative poles of the first-aid power source and the positive and negative poles of the car battery to be rescued, enabling the car battery to be charged by the power source.
When a jumper cable is used, the polarity connection between the first-aid power source and the car battery must be accurately confirmed. A polarity connection error may cause the car battery and the parts of the car to be damaged, or burned out, causing a catastrophe. The two conductors of a jumper cable are generally marked with different colors for quick recognition. However, if the color marks are covered with dirt or the jumper cable is used at night, the user may be unable to accurately recognize the polarity of the jumper cable, and a connection error may occur.
U.S. Pat. No. 4,769,586 discloses a jumper cable apparatus
10
which can automatically recognize the polarity of a battery. This structure of jumper cable apparatus
10
comprises two conductor pairs
16
,
18
for connection between two batteries
12
,
14
. When installed, the jumper cable apparatus
10
recognize the polarity of the batteries
12
,
14
based on the current in the conductor pairs
16
,
18
, and makes a switching operation, if necessary, to let the two poles of the first battery
12
be accurately coupled to the two poles of the second battery
14
. Because this jumper cable apparatus recognize the polarity by means of detecting the voltage at the conductor pairs
16
,
18
, it must intermittently detect the current at the conductor pairs
16
,
18
, and use a complicated switching circuit to switch relays
36
during detection. Therefore, the reaction of this structure of jumper cable apparatus is slow. After installation, this jumper cable apparatus
10
takes much time to detect the connection of the clips
22
,
23
,
24
,
25
at the ends of the conductor pairs
16
,
18
.
SUMMARY OF THE INVENTION
The main object of the present invention is to provide a simple, safety car battery jumper cable which can accurately couple a power source to the battery to be rescued. According to the preferred embodiment of the present invention, the car battery jumper cable comprise a relay switching circuit, first and second voltage polarity recognition circuits, a logic recognition circuit, and a driving circuit. The relay switching circuit is connected to the two poles of a first power supply device (the power source or the battery to be rescued) by a first current conductor pair, and connected to the two poles of a second power supply device (the battery to be rescued or the power source) by a second current conductor pair. The first voltage polarity recognition circuit is connected to the two poles of the first power supply device through a first voltage conductor pair to recognize the polarity of the first power supply device. The second voltage polarity recognition circuit is connected to the two poles of the second power supply device through a second voltage conductor pair to recognize the polarity of the second power supply device. The logic recognition circuit produces a control signal subject to the polarity of the first power supply device and the second power supplydevice. The driving circuit is controlled by the control signal from the logic recognition loop to drive the relay switching circuit, enabling the two poles of the first power supply device to be accurately coupled to the two poles of the second power supply device.
REFERENCES:
patent: 4400658 (1983-08-01), Yates
patent: 4871957 (1989-10-01), Taranto et al.
patent: 5993250 (1999-11-01), Hayman
patent: 6140797 (2000-10-01), Dunn
Bacon & Thomas PLLC
DHC Specialty Corp.
Paladini Albert W.
LandOfFree
Car battery jumper cable does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Car battery jumper cable, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Car battery jumper cable will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-2456687