Saw chain having headless fastener

Details Saw chain having headless fastener Saw chain having headless fastener

1991-06-20

1992-06-23

Yost, Frank T.

Stone working

Sawing

Endless

83698, 83830, 411500, B27B 1700

Patent

active

051234009

ABSTRACT:
A saw chain having center links and side link pairs that are pivotally joined by a headless fastener. The side link pairs are formed into an integral unit, by a bridge portion to receive a center link therebetween. The center link and the side link pair have aligned bores for receiving a fastener. The fastener has a center section that is rotatably received in the bore of the center link and has larger end sections on each side of the center section that are received in the bores of the side link pair. The diameter of the center section of the fastener is smaller than the diameter of the end sections. The bore of the center link is of a smaller diameter than the bores in the side link pair. The fastener is forcibly inserted into the aligned bores of the side link pair and the center link. The forced insertion of the fastener forces the bore of the center link to enlarge permitting an end section of fastener to pass through with the center section of the fastener residing in the bore of the center link. The bore of the center link returns to its original dimension to capture the fastener in the assembly. The fastener has a length corresponding to the width of the side link pair and therefore does not extend beyond either side of the pair.

REFERENCES:
patent: 1637247 (1927-07-01), Snyder
patent: 2652076 (1953-09-01), Bye
patent: 2713806 (1955-07-01), Dodge
patent: 2747624 (1956-05-01), Cox
patent: 2792035 (1957-05-01), Aumann
patent: 4750886 (1988-06-01), Portelli et al.

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