Patent ID: 6868588
Filing Date: 2005-03-22
Classification: F16B,Y10T

Abstract:
1. An assembly comprising: a spring fastener comprising a first side and a second side opposite the first side, the first side connected to the second side thereby forming a U-shaped structure having a cavity between the first side and the second side, a bottom portion wherein the first side and the second side are connected, and a top portion, the first side comprising first barbs having first front ends, and a first engagement spring, the first engagement spring connected to the first side in the vicinity of the bottom portion, the second side comprising second barbs second front ends, and a second engagement spring, the second engagement spring connected to the second side in the vicinity of the bottom portion, each of the first and second engagement springs having a recess and a free end in the vicinity of the top portion, each spring also comprising a peak and an engagement region with a hindrance portion between the recess and the peak, the hindrance portion comprising one structure selected from ripple, side rib, upward solid bent extension parallel to the peak and the recess, knurled region, bent teeth, each having a depth, and a combination thereof; a first part comprising a rib inserted into the cavity of the spring fastener and engaged to the first and second barbs; and a second part comprising a slot, the slot having a width and edges, the fastener being disposed in the slot in a manner that the edges of said slot are engaged to the engagement regions of the spring fastener; with the requirement that by pulling the rib, the fastener is extracted from the slot without damage to the fastener, and with a higher force than a force required in the absence of the hindrance portion.