Multi-stage fastening structure

Details Multi-stage fastening structure Multi-stage fastening structure

2007-10-23

2007-10-23

Stodola, Daniel P. (Department: 3679)

Supports: racks

Adjustable

Vertically

C211S192000, C312S265400, C403S231000, C403S241000, C403S256000, C403S403000

Reexamination Certificate

active

11192091

ABSTRACT:
A multi-stage fastening structure comprises an extension rod, a plurality of locking devices, and two fastening devices. A lateral retaining plate is formed at each end of the extension rod. A first flange and a second flange having different outer diameters from each other are formed on each of the locking devices. Each of the fastening devices comprises a sliding plate and a fastener. The sliding plate comprises: a locking part formed by bending the sliding plate; a trench formed on the sliding plate; a track mounted on each side of the trench; and a plurality of through holes formed on the sliding plate in front of the trench. The fastener comprises: a slideway on each side; an inward retaining plate on one edge of the fastener; a fingerboard on the other edge of the fastener; and a locking pawl formed on the bottom of the fastener near the fingerboard.

REFERENCES:
patent: 2619687 (1952-12-01), Kahn
patent: 6702124 (2004-03-01), Lauchner et al.
patent: 6948691 (2005-09-01), Brock et al.
patent: 7093725 (2006-08-01), Hartman et al.

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