Armstrong, Westerman, Hattori, McLeland & Naughton, LLP
Battery case
 A battery case comprising a case body, a closure for closing an open end of the case body, a pivotal plate pivotally movably supported in the vicinity of an opening edge of another open end of the case body for covering this open end, and a spring attached to the case body externally thereof for biasing the pivotal plate inwardly of the case body. Contact pieces are provided on the closure and the pivotal plate each on the inner surface thereof and adapted to contact the positive electrode and the negative electrode of a battery respectively. 
Sanyo Electric Co., Ltd.
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Y02E H01M H01M H01M H01M H01M
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Akihiro Hisao
Suzuki Yamada