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Modular cordless tools

  • US 3,952,239 A
  • Filed: 08/23/1974
  • Issued: 04/20/1976
  • Est. Priority Date: 08/23/1974
  • Status: Expired due to Term
First Claim
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1. A modular, cordless electric tool assembly comprising a power handle module including a casing forming a hand grip and enclosing rechargeable battery means and electric switch means on said handle manipulatable by an operator having his hand on the hand grip thereof;

  • a tool head module including a housing, output means on said housing, and an electric motor within said housing for driving said output means;

    said tool head housing and said power handle casing including complementary surfaces thereon, each of said surfaces having a length and a width, said length being greater than said width, each of said surfaces having slidably interengageable and disengagable means formed thereon for retaining said power handle and tool head together, said means being elongated in the direction of said length of said surfaces, electrical connector means exposed on the interengaged faces of said power handle module and tool head module and electrically engaging one another when said power handle and tool head are assembled together, said electrical connector means being connected to said rechargeable battery means and said switch, and to said tool output means, respectively, whereby said electrical connection is automatically made when said parts are assembled, said motor and said output means being controlled by operation of said switch operator on said handle.

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