Attachment member including a nail and a prestressing element

Details Attachment member including a nail and a prestressing element Attachment member including a nail and a prestressing element

1995-09-15

1997-04-29

Meyers, Steven N.

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

Impact driven fastener, e.g., nail, spike, tack, etc.

Having means to facilitate explosive driving

411480, 411544, 248 745, F16B 1500, F16B 1502, F16L 308

Patent

active

056242204

ABSTRACT:
An attachment member arranged to be secured to a surface of a hard receiving material by an explosive powder charge operated setting tool is formed of a fastening element (1), such as a nail, and a prestressing element (2). The prestressing element assures a sound attachment by bridging differences in the depth to which the nail is driven. To increase its surface contacting the surface of the hard receiving material, the prestressing element is laterally enclosed at least in part by a plastics material part (3) so that the pressure of the attachment member in contact with the receiving material and the danger of tilting of the setting tool relative to the receiving material are reduced. Further, a recess (3b) is formed in the plastics material part (3) to improve guidance between the prestressing element (2) and a bolt guide (4) of the setting tool.

REFERENCES:
patent: 2961210 (1960-11-01), Pfaff et al.
patent: 3320845 (1967-05-01), Eschweiler
patent: 3491648 (1970-01-01), Thurner
patent: 4903920 (1990-02-01), Merritt
patent: 4915561 (1990-04-01), Bohri et al.
patent: 5178503 (1993-01-01), Losada
European Search Report, Number EP 95 810 478.8 dated Apr. 3, 1996.

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