Fastener for blind holes

Details Fastener for blind holes Fastener for blind holes

1980-04-08

1982-03-09

Britts, Ramon S.

Expanded, threaded, driven, headed, tool-deformed, or locked-thr

Headed fastener element with nut, washer, securing means or cap

Securing means pivotable about axis transverse to fastener...

411392, F16B 3504

Patent

active

043186513

ABSTRACT:
A fastener for use in plaster walls, ceilings, and the like to support a lamp or plant, includes a conventional screw of uniform diameter, a spring threaded over the screw, and a toggle with a screw threaded hole of large enough diameter to be threaded over the outer surface of the spring. The screw may be capable of engaging the threads in the toggle plate, although the diameter must be small enough so that the spring may be received between the threads of the lag screw and the threads of the hole in the toggle plate. The screw may be a lag screw, a machine screw thread, etc. The screw shank is full-sized, not reduced to receive the helical spring. The spring serves to connect the screw and the toggle plate by being threaded partially one into the other and has the capability of being bent resiliently so that toggle and screw are parallel to each other for insertion into a blind hole, after which the toggle springs back into position and the assembly is screwed together. The spring may be a plastic tube.

REFERENCES:
patent: 2203146 (1940-06-01), Hexdall
patent: 4047462 (1977-09-01), Hurtig
patent: 4196883 (1980-04-01), Einhorn et al.

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