Prevention of electro-chemical corrosion at charging contacts of a battery-powered handpiece and its charger device
First Claim
Patent Images
1. A battery-powered handpiece, comprising:
- a first charging contact connectable to a first contact of a battery; and
means for allowing charging current to flow from said first charging contact into said battery but preventing current flow in the opposite direction.
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Abstract
The present invention relates to the prevention of electro-chemical corrosion at charging pins, especially of a battery-powered handpiece and its charging station.
33 Citations
31 Claims
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1. A battery-powered handpiece, comprising:
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a first charging contact connectable to a first contact of a battery; and
means for allowing charging current to flow from said first charging contact into said battery but preventing current flow in the opposite direction. - View Dependent Claims (2, 3, 4, 5)
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6. A battery-powered handpiece, comprising:
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a first charging contact connectable to a first contact of a battery;
a second charging contact connectable to a second contact of said battery; and
a sensing contact arranged in the path of potential electrolytic current flow between said first charging contact and said second charging contact. - View Dependent Claims (7, 8)
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- 9. A charger device for a battery-powered handpiece, comprising a dectector for detecting the presence or absence of said battery-powered handpiece and a switch for switching on or off the charging voltage dependent on detection of the presence or absence of said handpiece.
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13. A charger device for a battery-powered handpiece, comprising:
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a first charging pin;
a second charging pin; and
a sensing pin arranged in the path of potential electrolytic current flow between said first charging pin and said second charging pin. - View Dependent Claims (14, 15)
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16. A device comprising a battery-powered handpiece and a charger device for a battery-powered handpiece wherein:
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a) said battery-powered handpiece comprises a first charging contact connectable to a first contact of a battery, and means for allowing charging current to flow from said first charging contact into said battery, but preventing current flow in the opposite direction; and
b) said charger device for a battery-powered handpiece comprises a detector for detecting the presence of absence of said battery-powered handpiece, and a switch for switching off or on the charging voltage dependent on detection of the presence or absence of the handpeice. - View Dependent Claims (17, 18, 19, 20, 21, 22, 23, 24, 25, 26)
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27. A device comprising a battery-powered handpiece and a charger device for a battery-powered handpiece comprising:
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a) a battery-powered handpiece comprising;
a first charging contact connectable to a first contact of a battery;
a second charging contact connectable to a second contact of said battery; and
a sensing contact arranged in the path of potential electrolytic current flow between said first charging contact and said second charging contact.b) a charger device for a battery-powered handpiece comprising;
a first charging pin;
a second charging pin; and
a sensing pin arranged in the path of potential electrolytic current flow between said first charging pin and said second charging pin. - View Dependent Claims (28, 29, 30, 31)
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Specification