Recharging system for low-voltage, cordless appliances

• US 20080042623A1
• Filed: 08/09/2007
• Published: 02/21/2008
• Est. Priority Date: 08/18/2006
• Status: Abandoned Application

• Current Assignee: Anthony Kit Lun Leung
• Original Assignee: Anthony Kit Lun Leung
• Inventors: Leung, Anthony Kit Lun
• Application Number:
  US11/891,099
• Publication Number:
  US 20080042623A1
• Time in Patent Office: Days
• US Class Current: 320/165
• CPC Class Codes: H02J 7/0045 concerning the insertion or the connection of the batteries

Abstract

An appliance charger comprises an electrical cord (6) for connection to an electrical source, a transformer (2), a control circuit board (4) or chip, contact terminals (7) for contacting an appliance (8), and a switch (5) for selectively closing a circuit when an appliance is connected to the charger and for opening the circuit by default when the appliance is removed, thereby cutting off power to the transformer.

Claims

1. A recharging base for a rechargeable electric appliance, said base comprising

a housing;

an electrical cord extending from said housing and having one end adapted to plug into an external electrical source for supplying electrical energy to said base;

at least one electrical contact surface exposed externally of said housing for transferring electrical energy from said external electrical source to a rechargeable battery that is placed in electrically conductive contact with said contact surface; and

a switch associated with said contact surface for selectively enabling or disabling transfer of electrical energy to said contact surface.

2. A base according to claim 1, further comprising

a receptacle on said housing for receiving an appliance containing said battery and maintaining said battery in electrically conductive contact with said contact surface.

3. A base according to claim 1, further comprising

an actuating mechanism associated with said switch for selectively enabling and disabling said switch when said mechanism is contacted by said battery or a structure connected to said battery.

4. A base according to claim 2, further comprising

an actuating mechanism associated with said switch for selectively enabling and disabling said switch when said mechanism is contacted by said appliance.

5. A base according to claim 1, further comprising

an electrical transformer located in said housing.

6. A base according to claim 1, further comprising

a control circuit board located in said housing for controlling one or more functions of said base.

7. A base according to claim 1, wherein

said switch is moveable between a first position in which said switch completes a closed electric circuit and draws electrical power from said external electrical source, and a second position in which said switch opens said closed electric circuit so that no electrical power is drawn from said external electrical source.