Joints and connections – Member ends joined by inserted section – Expansible section
Reexamination Certificate
2006-01-31
2006-01-31
Stodola, Daniel P. (Department: 3679)
Joints and connections
Member ends joined by inserted section
Expansible section
C403S292000, C403S309000, C403S313000, C403SDIG011, C403SDIG013, C411S479000
Reexamination Certificate
active
06991397
ABSTRACT:
An improved dowel fastener for compressive insertion within a recess, bore or aperture in each of two joint members of wood, metal, plastic or combinations thereof to frictionally retain one joint member to the other. The dowel fastener includes a flexible, resilient, tubular body having a preferably spiral slot extending from end to end and at least one and preferably two spaced tabs at positions along the slot. The tabs each extend from one slot edge across the slot toward the opposing slot edge and engage the inside surface of the tubular body adjacent the opposing slot edge. The body provides a cylindrical exterior gripping surface for engagement with the sides of the joint apertures and is sufficiently flexible for compression from its normal, uncompressed diameter for insertion in a smaller fastening aperture. The resiliency of the tubular body and the engagement of the tabs with the inside surface of the body resist compression for secure frictional engagement by the body exterior with the sides of the fastening apertures.
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Brochure, “Whenever fastening problems arise . . . Consider Elastic Stop Nuts,” by Elastic Stop Nut Corporation of America, Union, New Jersey (1952).
Photograph of compression dowel of the type described in U.S. Pat. No. 4,474,943 but also including a phosphate coating, manufactured and sold more than one year prior to the filing date of this application by Modular Systems, Inc., Fruitport, Michigan 49417.
Ferguson Michael P.
Modular Systems, Inc.
Stodola Daniel P.
Van Dyke Gardner, Linn & Burkhart, LLP
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