Patent ID: 6036236
Filing Date: 2000-03-14
Classification: F28F,Y10S

Abstract:
A heat exchanger comprising:a tank having a wall, an opening through the wall, and an annular collar concentric with the opening and extending from an outer surface of the wall;a retaining washer positioned substantially concentrically within the annular collar and engaging an outer surface of the wall, the retaining washer having an opening;a connector having a threaded portion inserted through the opening of the retaining washer and the opening of the wall, the connector being connected to the retaining washer so that the connector does not rotate relative to the retaining washer;a nut receiving the threaded portion and the connector being secured to the wall by rotating the connector in one direction,wherein the retaining washer has first projections and the annular collar has second projections, the first projections engaging the second projections, andwherein the first and second projections are arranged to permit the retaining washer to rotate in the one direction and prevent unintentional rotation in the opposite direction.