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POWER PACK

  • US 3,883,789 A
  • Filed: 03/19/1974
  • Issued: 05/13/1975
  • Est. Priority Date: 06/08/1973
  • Status: Expired due to Term
First Claim
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1. A power pack for use with a hand tool comprising a housing, an electric motor positioned within the forward end of said housing;

  • a reciprocating tool assembly extending from the forward end of said housing and being coupled for operation to said motor;

    an integral handle portion extending rearwardly from the rear upper portion of said housing;

    the rear-most free end of said handle having a downwardly facing groove defined by a pair of spaced surfaces;

    the lower rear portion of said tool housing having a hollow rearwardly facing collar;

    first electrical contact means along one interior surface of said collar;

    one wall of said collar having an opening;

    said power pack comprising;

    an L-shaped housing;

    a plurality of batteries in said L-shaped housing;

    means in said L-shaped housing for electrically connecting said batteries;

    one limb of said L-shaped housing having a configuration conforming to the shape of the hollow limb receiving collar provided at the lower rear end of said tool housing;

    said one limb being adapted to be slidably inserted into said hollow collar;

    second electrical contact means along one exterior portion of said one limb and means for connecting said second contact means to said batteries;

    said second contact means slidably engaging said first contact means when said one limb is inserted into said collar;

    the remaining limb of said L-shaped housing having a T-shaped projection for slidably engaging the facing edges of said spaced surfaces when said one limb is inserted into said hollow collar;

    said one limb having a locking projection, biasing means for urging said locking projection outwardly and into said collar opening to lock said L-shaped housing in said collar when said one limb is inserted into said hollow collar;

    said tool housing handle and said L-shaped housing collectively defining a large opening for receiving the operator'"'"''"'"'s hand to facilitate gripping of the tool.

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