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Extension element for use with wrench-type hand tools

  • US 5,033,337 A
  • Filed: 11/20/1990
  • Issued: 07/23/1991
  • Est. Priority Date: 11/20/1990
  • Status: Expired due to Fees
First Claim
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1. An extension unit for use with wrench-type hand tools comprising:

  • (A) a tubular hollow handle element having(1) a first end,(2) a second end,(3) a cylindrical body connecting said first and second ends together, said cylindrical body including a longitudinal axis extending from said first end to said second end, and(4) a bore defined through said body from said first end to said second end, said bore being rectangular in cross section and including planar sides, adjacent ones of which intersect each other to form corners;

    (B) a monolithic extension arm element slidably attached to said handle element and including(1) a first end,(2) a second end,(3) a ratchet accommodating element on said extension arm first end,(4) means for accommodating a socket element on said extension arm second end,(5) said extension arm including a longitudinal axis extending from said extension arm first end to said extension arm second end and having a rectangular cross section with planar sides adjacent ones of which intersect each other to form corners, said extension arm corners being received in said handle bore corners;

    (C) connecting means for coupling said extension arm element to said handle element and including(1) a plurality of blind-ended bores defined in said extension arm at locations which are uniformly spaced apart along said extension arm longitudinal axis,(2) a spring element located in each blind-ended bore and being connected at one end thereof to said extension arm element,(3) a ball element in each blind-ended bore and being connected to the spring element in said blind-ended bore, said spring element biasing said ball element outwardly of said blind-ended bore,(4) a release pin bore defined through said handle element adjacent to said handle element first end to intersect said handle element bore,(5) a release pin slidably mounted in said release pin bore with a lower end located in said release pin bore and an upper end which is located outside of said release pin bore, said release pin being slidable in said release pin bore from a first location with said release pin lower end spaced from said handle element bore to a second position with said release pin lower end being flush with said handle element adjacent to said handle element bore, and(6) a tether element connecting said release pin to said handle element.

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