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Portable labor-saving battery device for electric vehicle

  • US 6,747,437 B2
  • Filed: 10/10/2002
  • Issued: 06/08/2004
  • Est. Priority Date: 09/27/2002
  • Status: Expired due to Fees
First Claim
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1. A portable labor-saving battery device for a electric vehicle, comprising:

  • a battery set having a socket on a surface of said battery set and a contact implemented on a bottom of said battery set;

    a cap having a first end pivoting on a bottom of a upper surface of said battery set, wherein said cap lying next to said upper surface of said battery set when folded up and providing a load-bearing space when bent down;

    a wheel set implemented on a bottom of a lower surface of said battery set; and

    an extension bar having both ends penetrating through both sides on a top of said battery set and extending into said battery set, wherein said extension bar having springs implemented at both ends of said extension bar inside said battery set.

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