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Device for advancing a rotatable tube

  • US 5,350,101 A
  • Filed: 02/16/1993
  • Issued: 09/27/1994
  • Est. Priority Date: 11/20/1990
  • Status: Expired due to Fees
First Claim
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1. A device for advancing an elongated piece of stock, which comprises:

  • a housing;

    a collet for radially surrounding a portion of said stock, said collet being movable between a first configuration wherein said collet grips said stock for translation with said stock, and a second configuration wherein said collet releases said stock for independent movement of said collet relative to said stock;

    a chuck slidingly surrounding said collet and movable relative thereto between a first position and a second position for respectively moving said collet into said first and second configurations, said chuck being formed with a radial groove;

    an actuator having a projection formed perpendicularly thereon for engaging said groove of said chuck;

    an elongated advancer having first and second ends, wherein said collet is formed as said first end of said advancer, said second end of said advancer being slidably attached to said housing and said advancer being formed with a ring extending radially outward from said advancer intermediate said first and second ends, said stock slidably and rotatably extending coaxially through said advancer and said housing;

    first means attached to said device for limiting the advancing translation of said collet to cause said chuck to move into said second position; and

    second means distanced from said first means and attached to said device for limiting independent movement of said collet to move said chuck into said first position.

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