Patent Document

BACKGROUND 
     1. Technical Field 
     This invention relates generally to rechargeable batteries and more specifically to the field of removable covers for rechargeable batteries. 
     2. Background Art 
     Many outdoorsmen use two-way radios to communicate. Most two-way radios, as well as many other portable electronic devices, employ rechargeable batteries as the primary power source. When the consumer buys a radio, there is generally a charger that mates to the radio. When the charger is coupled to the radio, the battery within begins charging. 
     Other radios include desktop stands in which the radio sits. These desktop stands generally include a form-fitted pocket for the radio. When the radio is placed in the pocket, the battery begins charging. 
     Often the shape, or “form-factor” of the radio is quite different from that of the radio. For example, the battery may be rectangular while the radio is rounded so as to fit in the hand more easily. Consequently, a charger or desktop stand designed to mate with the radio will not mate with the battery. If a user wants to charge two batteries, he must insert one in the radio and couple the radio to the charger or desktop stand. Once that battery is charged, he must remove it, insert the second battery into the radio, and couple the radio to the charger or desktop stand. This serial charging process is slow and tedious. 
     There is thus a need for a means of charging a battery without an electronic host device. 
    
    
     BRIEF DESCRIPTION OF THE DRAWINGS 
     FIG. 1 is an illustration of one embodiment of a battery and charging cover in accordance with the invention. 
     FIG. 2 is an illustration of a battery inserted in a charging cover in accordance with the invention. 
     FIG. 3 is an illustration of a charging device coupled to a battery inserted in a charging cover in accordance with the invention. 
    
    
     DETAILED DESCRIPTION OF THE INVENTION 
     A preferred embodiment of the invention is now described in detail. Referring to the drawings, like numbers indicate like parts throughout the views. As used in the description herein and throughout the claims, the following terms take the meanings explicitly associated herein, unless the context clearly dictates otherwise: the meaning of “a,” “an,” and “the” includes plural reference, the meaning of “in” includes “in” and “on.” 
     Referring now to FIG. 1, illustrated therein is a cover  1  for a battery  2 . The battery  2  has a housing  4  having a top part  7  and a bottom part  8 . The housing  4  has charging contacts  3  disposed thereon. The housing  4  also includes optional mating prongs  5 , 6 . In one embodiment, the housing  4  includes a first set of mating prongs  6  disposed on the bottom part  8 . 
     The cover  1  comprises a base  9 , a back  10 , a first side  18 , a second side  19 , and a belt  13 . Attached to the back is a latch  11  having optional finger ridges  12  for ease of use. The belt  13 , in combination with the first side  18 , the left side  19  and the base  9  circumscribe a main orifice  14 . The first side  18  includes a first orifice  16 , and the second side  19  includes a second orifice  15 . The cover  1  is designed such that the battery  2  may be inserted into the cover  1 . Upon insertion, the latch  11  will couple with the top part of the battery  7 , the base  9  will couple with the bottom part of the battery  8  and the belt  13  will wrap about the housing  4 . When the optional first set of mating prongs  6  are included on the battery housing  2 , the cover may include a set of mating receptacles  17  to assure a proper fit. 
     The cover  1  may be manufactured by any number of manufacturing processes, including injection molding. The cover may be made from any number of materials, including plastics, styrene, acrylic, polycarbonates, resins, rubber, or other compounds. 
     Referring now to FIG. 2, illustrated therein is the battery  2  inserted into the cover  1 . During the insertion process, the back, being manufactured from a flexible material like plastic, deflects in a cantilever motion to allow the latch  11  to move about the battery housing and engage the top part  7 . Likewise, to disengage the latch  11  and remove the battery  2  from the cover  1 , one simply places a finger on the finger ridges  12  and depresses the latch away from the battery  2 , causing the back  10  to again deflect with a cantilever motion. Once the back  10  is deflected, the battery  2  can be easily removed. 
     When the battery  2  is inserted into the cover  1 , the charging contacts  3  are exposed through the main orifice  14 . This exposure is critical to the invention, as the first orifice  16  and the second orifice (not shown) enable a charging plug to be coupled to the charging contacts  3  through the main orifice  14 . 
     Referring now to FIG. 3, illustrated therein is a charging plug  30  coupled to the cover  1  via the first orifice  16  and the second orifice (not shown). The charging plug has a first hook  31  that engages with the first orifice  16 . The charging plug has a second hook that engages with the second orifice in a likewise manner. The second hook is coupled to a thumb lever  32  so that it may be deflected with a cantilever motion. To couple the charging plug  30  to the cover  1 , one inserts the first hook  31  in the first orifice  16 . The mechanical interface between the first hook  31  and the first orifice  16  work as a fulcrum about which the charging plug  30  may be rotated. By rotating the charging plug  30  towards the cover  1 , the second hook deflects about the second side  19  until it snaps into the second orifice. The charging plug  30  is removed by placing a finger on the thumb lever  32  and deflecting the second hook out of the second orifice while pulling the charging plug  30  away from the cover. 
     The charging plug  30  has power terminals disposed thereon in a mirror image to the charging contacts. The power terminals may be spring loaded so as to ensure a low-impedance electrical connection when the charging plug is coupled to the cover  1 . When the charging plug  30  is coupled to the cover  1  with a battery  2  inserted, the power terminals mate electrically with the charging terminals to charge the battery. Charging circuitry may be disposed in a power supply that is coupled to the charging plug  30  via a wire or cable. 
     Thus, the invention allows charging of a battery without the need of a desktop stand or other electronic device. It allows a charging plug having mechanical contacts which are not compatible with the mechanical form factor of a battery to successfully couple electrically with the battery, thereby enabling the charging process. 
     While the preferred embodiments of the invention have been illustrated and described, it is clear that the invention is not so limited. Numerous modifications, changes, variations, substitutions, and equivalents will occur to those skilled in the art without departing from the spirit and scope of the present invention as defined by the following claims. For example, while one embodiment of the cover has been illustrated as having three orifices, any number of ridges, orifices may be needed to accommodate the wide variety of charging plugs that abound today.

Technology Category: h