Electrical terminal with a collet grip for a defibrillator

An implantable defibrillator including a pulse generator housing and a header coupled to said housing, said header including a spring contact supported within said header and a terminal for detachably connecting one or more leads each having one or more lead connector pins to said defibrillator, said terminal comprising:

• an outer sleeve adapted to be mechanically fixed and electrically connected to said implantable defibrillator;
• a collet structure adapted to be carried by said outer sleeve for movement between first and second positions relative to said outer sleeve, said collet structure having at least two fingers thereon movable relatively toward and away from one another between a first spaced apart position less than the diameter of said electrical lead connector pin and a second spaced apart position greater than the diameter of said electrical lead connector pin for gripping said lead connector pin in substantially said first spaced apart position and receiving and releasing said lead connector pin in said second spaced apart position;
• push button positioning means for moving said collet from said first position to said second position, thus moving said fingers from said first spaced apart position to said second spaced apart position;
• and
• spring positioning means for moving said collet from said second position to said first position, thus moving said fingers from said second spaced apart position to first spaced apart position;
• wherein said collet has a tapered outer surface portion, said outer sleeve has a tapered inner surface portion, and said collet tapered outer surface portion is in sliding contact with said outer sleeve tapered inner surface portion;
• wherein the cross sections of said outer sleeve tapered inner surface portion and of said collet tapered outer surface portion are noncircular to prevent rotation of said collet with respect to said outer sleeve;
• and
• wherein when said terminal receives a bipolar lead having a connector pin and a connector ring said connector pin is received in said collet structure and said connector ring is engaged by said spring contact.